CN114339920A - A kind of cross-border vehicle management system and communication network adaptive switching method - Google Patents

Abstract

The invention relates to a cross-border vehicle-mounted management system and a communication network self-adaptive switching method, and belongs to the technical field of satellite navigation systems. By reasonably dividing the cross-border area, the position of the cross-border vehicle-mounted positioning communication terminal is detected and marked in real time, the cross-border behavior of the terminal is automatically judged, and a communication network switching strategy is executed. The method is simple and easy to implement, can ensure that a stable communication network is used in the cross-border process, avoids the condition of poor communication quality caused by frequent network switching in the port area, and has the characteristics of stable communication quality and low cost.

Description

A kind of cross-border vehicle management system and communication network adaptive switching method

technical field

The invention belongs to the technical field of satellite navigation systems, and relates to a method for self-adaptive switching of a cross-border terminal to realize communication networks of different countries in a cross-border process in a cross-border vehicle management system. It is used to realize real-time detection of the behavior of vehicles entering and leaving the national border during cross-border driving without affecting the communication performance, and adaptively select the communication network of the corresponding country according to the location of the vehicle for location, text and other data. It can realize the adaptive switching of the communication network in the cross-border process.

Background technique

In the process of cross-border transportation, the supervision of cross-border vehicles, especially inbound vehicles, is relatively weak. At the same time, the safety rescue of personnel and vehicles during the operation of international road transport vehicles is also delayed due to language and institutional settings, which are all problems that urgently need to be solved at present.

In terms of vehicle monitoring within a single country, a terminal equipped with a satellite positioning system and a national public network communication module can be used, combined with an intelligent platform system, to realize the monitoring and dispatching function of vehicles. This solution can achieve the purpose of vehicle management in the process of cross-border use. It needs to switch communication networks in different countries. It has the characteristics of high mobile roaming charges, which brings a large economic burden to users, thus hindering mass promotion and application. In addition, two in-vehicle terminals can be installed on a single cross-border vehicle to support the communication systems of two countries at home and abroad respectively, so as to achieve the function of vehicle monitoring and management in cross-border operations. However, this solution has the characteristics of high communication price, complicated installation, and high requirements for the installation position of the vehicle. Therefore, it is necessary to use a cross-border communication network adaptive strategy that is easy to install and switch intelligent.

SUMMARY OF THE INVENTION

technical problem to be solved

In order to solve the problems of high cost and unstable handover in cross-border communication in the prior art, the present invention proposes a cross-border vehicle management system and a communication network adaptive handover method. Simplify the design of cross-border vehicle-mounted terminals in international road transportation, reduce usage costs, and take into account the functionality, convenience and cost reduction of cross-border vehicle-mounted terminal communications.

Technical solutions

A cross-border on-board management system is characterized by comprising a cross-border on-board communication positioning terminal and a central platform, and the cross-border on-board communication positioning terminal has a positioning function and dual communication modules, which can realize real-time location through public network communication. The central platform, the central platform receives the location information through the wireless network and displays the location of the vehicle.

A further technical solution of the present invention: the cross-border vehicle communication positioning terminal supports Beidou, GPS and GLONASS positioning.

A further technical solution of the present invention: the cross-border vehicle communication positioning terminal includes a Beidou/GLONASS/GPS integrated antenna, a communication antenna, a communication module, a positioning module, an information processing and control module, an interface circuit and a power management module, wherein the Beidou/GLONASS/GPS integrated antenna The /GLONASS/GPS antenna receives the signals from the Beidou/GLONASS/GPS satellite system and transmits it to the positioning module. The positioning module transmits the positioning information to the information processing and control module. On the one hand, the information processing and control module uses the communication module to communicate with the center through the communication antenna. The platform communicates location information, on the one hand, it transmits it to other peripherals that need location information through the interface circuit; the power management module is responsible for providing power supply for the location module, communication module, information processing and control module, and interface circuit.

A communication network adaptive switching method for a cross-border vehicle management system, characterized in that the steps are as follows:

Step 1: According to the actual location of the port involved in the cross-border vehicle itinerary, export the administrative region boundary point of the region;

Step 2: Connect the port coordinate points in the administrative area border points as the cross-border border line;

Step 3: Extend from the border line to both sides, draw polygonal areas inside and outside the border crossing road area of the port respectively, and the area should cover the entire port location as much as possible;

Step 4: Set the domestic area and overseas area of the port to the terminal according to the specific port that the vehicle needs to pass through;

Step 5: After the satellite signal is received through the integrated antenna, and the positioning module is successfully positioned, after the information processing and control module receives the positioning information of the positioning module, it uploads the central platform through the communication module and the communication antenna according to the agreed protocol, and the information is processed and controlled. The module judges at fixed time intervals whether the terminal location is within the above two areas, the domestic area and the overseas area, and whether there is cross-border behavior; when the information processing and control module judges that the current terminal location is within the territory of country 1, and not at the port of country 1 In the area, set the cross-border flag to 1; when the information processing and control module determines that the current terminal location is within the territory of country 2 and leaves the port area of country 2, set the cross-border flag to 2; when the flag changes from 1 to 1 When it is 2, it means that the cross-border behavior of the vehicle from country 1 to country 2 is completed; when the flag bit changes from 2 to 1, it means that the cross-border behavior of the vehicle from country 2 to country 1 is completed, and the current location of the vehicle is marked as country 1;

Step 6: The information processing and control module enables the corresponding country 1 communication module or country 2 communication module according to the state of the country location labeling to realize automatic switching.

According to a further technical solution of the present invention, in step 3, according to the accuracy of the positioning module, the area in the inner and outer directions is expanded by three times the scope of the area to determine the entry port area.

beneficial effect

The cross-border vehicle management system and the communication network adaptive switching method proposed by the present invention can detect and mark the location of the cross-border vehicle positioning communication terminal in real time by reasonably dividing the cross-border area, and automatically determine the cross-border behavior of the terminal and execute it. Communication network switching strategy. The invention is simple and easy to implement, can ensure the use of a stable communication network in the cross-border process, avoid the situation of poor communication quality caused by frequent network switching in the port area, and has the characteristics of stable communication quality and low cost. Has the following beneficial effects:

1. A new communication module is added to the structure of the single communication module of the general vehicle terminal, which realizes the communication functions of country 1 and country 2 on both sides of the border respectively, without changing the structure and connection relationship of the existing system, simple operation and easy implementation, And the cost is kept to a minimum.

2. When switching to a foreign country after the cross-border, the strategy of expanding the cross-border behavior judgment area is adopted to improve the robustness of the handover jitter of the communication network.

3. The terminal position is detected periodically, and the selection of the communication network is carried out according to the completion of the cross-border behavior. It is judged whether the terminal has entered another country area across the border, and has entered another country area stably, and the completion of the cross-border behavior is determined by marking. Converted to digital judgment, visual and less error-prone.

4. By pre-constructing domestic areas and overseas areas and storing them in the information processing and control module, accurately obtaining positioning information through the positioning module, and determining the vehicle based on the positioning information, the location of the cross-border vehicle positioning communication terminal can be detected and marked in real time. , which automatically executes the communication network switching strategy.

5. Determine the area to which it belongs based on the location information, and then use the communication module corresponding to the corresponding area to communicate. Use the division of cross-border areas to ensure the use of a stable communication network during the cross-border process, and avoid frequent network switching in the port area. Communication caused by In the case of poor quality, it has the advantages of stable communication quality and low cost.

Description of drawings

The drawings are for the purpose of illustrating specific embodiments only and are not to be considered limiting of the invention, and like reference numerals refer to like parts throughout the drawings.

Figure 1 The composition of the cross-border vehicle monitoring system;

Figure 2 is a structural diagram of a cross-border vehicle communication positioning terminal;

Fig. 3 communication network adaptive handover method;

Figure 4 Schematic diagram of the judgment area at the cross-border port at home and abroad.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in FIG. 1 , the cross-border vehicle monitoring system applied by the present invention is composed of a cross-border vehicle-mounted positioning communication terminal, a central platform and a public communication network. The cross-border vehicle positioning communication terminal is connected to the central platform through the public communication network. The terminal supports Beidou, GPS, and GLONASS positioning, and has dual communication modules, which can send real-time location to the central platform through public network communication. The central platform is the core of the monitoring system. It can receive the location and image information of the vehicle terminal through the wireless network, realize the two-way interaction of audio and video, and display the location of the vehicle through the GIS system.

As shown in Figure 2, the communication part of the cross-border vehicle positioning communication terminal is composed of two communication modules. The mid-border vehicle communication positioning terminal is composed of a satellite receiving antenna, a communication antenna, a communication module, a positioning module, an information processing and control module, an interface circuit and a power management module. The terminal supports Beidou, GPS, and GLONASS positioning, and has dual communication modules, which can send real-time location to the central platform through public network communication. The Beidou/GLONASS/GPS antenna receives the signals sent by the Beidou/GLONASS/GPS satellite system, and transmits it to the Beidou/GLONASS/GPS positioning module for signal processing to obtain positioning information, and the positioning module transmits the positioning information to the information processing and control module. On the one hand, the communication module uses the communication module to communicate position information and text information with the central platform through the communication antenna, and on the other hand, transmits it to other peripherals that need positioning information through the interface circuit. The power management module is responsible for providing power supply for the positioning module, the communication module, the information processing and control module, and the interface circuit.

The central platform is the core of the monitoring system, adopts B/S architecture, and the server is deployed in the user management center, which can receive the location information of the vehicle terminal through the wireless network and display the location of the vehicle.

The communication network adaptive switching method in the cross-border vehicle management system is based on the idea of an electronic map, calculates the country where the vehicle is located through the current latitude and longitude, and accurately determines whether the current location of the vehicle is within the country or abroad. Its core technology is to divide the electronic map into multiple regions according to national borders, and determine which region the location is in according to the current latitude and longitude. However, due to the limited computing power of the vehicle-mounted terminal, the entire electronic map cannot be built-in. Therefore, the judgment of the region can be simplified and cross-border judgment can be realized according to the specific location of each port.

As shown in FIG. 3 , the communication network adaptive switching method in the cross-border on-board management system of the present invention is realized by the software of the cross-border on-board terminal controller. The workflow of the cross-border communication network switching method is as follows:

(1) According to the actual location of the port involved in the cross-border vehicle itinerary, the administrative region boundary point of the region is derived.

(2) Select several coordinate points near the port from the border points of the administrative region as cross-border border lines.

(3) As shown in Figure 4, extending from the border line to both sides, draw polygonal areas inside and outside the country respectively, and the area should cover the entire port location as much as possible. Since the accuracy of the positioning module is generally within 15 meters, the area is expanded by about 50 meters in both internal and external directions as the port area.

(4) According to the specific port that the vehicle needs to pass through, the domestic area and overseas area of the port are sent to the terminal through the USB interface or platform, and the terminal judges whether there is initial area information, and whether the newly received area information is consistent with the saved area information. , if inconsistent, save the area information again.

(5) After the terminal is successfully located, determine whether the terminal location is within the above two areas and whether there is cross-border behavior at fixed time intervals. When it is judged that the location is within the territory of country 1 and is not within the range of the port area of country 1, the cross-border flag bit of the terminal is set to 1; The boundary flag is set to 2. When the flag bit changes from 1 to 2, it means that the cross-border behavior of the vehicle from country 1 to country 2 is completed. When the flag bit changes from 2 to 1, it means that the cross-border behavior of the vehicle from country 2 to country 1 is completed, and the current location of the vehicle is marked as country 1.

(6) Enable the corresponding communication module according to the state of the national location marking to realize automatic switching.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed by the present invention. Modifications or substitutions should be included within the protection scope of the present invention.

Claims (5)

1. The cross-border vehicle-mounted management system is characterized by comprising a cross-border vehicle-mounted communication positioning terminal and a center platform, wherein the cross-border vehicle-mounted communication positioning terminal has a positioning function and a double communication module, a real-time position can be sent to the center platform through public network communication, and the center platform receives position information and displays the position of a vehicle through a wireless network.

2. The system of claim 1, wherein the cross-border vehicle communication positioning terminal supports Beidou, GPS and GLONASS positioning.

3. The cross-border vehicle-mounted management system as claimed in claim 2, wherein the cross-border vehicle-mounted communication positioning terminal comprises a big dipper/GLONASS/GPS integrated antenna, a communication module, a positioning module, an information processing and control module, an interface circuit and a power management module, wherein the big dipper/GLONASS/GPS antenna receives signals sent by a big dipper/GLONASS/GPS satellite system and transmits the signals to the positioning module, the positioning module transmits the positioning information to the information processing and control module, the information processing and control module communicates position information with the central platform through the communication antenna by using the communication module on one hand, and transmits the position information to other peripherals needing the positioning information through the interface circuit on the other hand; the power management module is responsible for providing power supply for the positioning module, the communication module, the information processing and control module and the interface circuit.

4. A method for adaptive handoff of a communication network of a cross-border vehicle-mounted management system as claimed in claim 3, characterized by the steps of:

step 1: according to the actual position of the port related to the cross-border vehicle journey, deriving the administrative region boundary point of the region;

step 2: connecting port coordinate points in boundary points of the administrative regions to form a cross-border line;

and step 3: extending from the border line to two sides, and respectively drawing polygonal areas inside and outside the border of the cross-border road area of the port, wherein the area should cover the position of the whole port as much as possible;

and 4, step 4: setting an internal region and an external region of a port to a terminal according to a specific port through which a vehicle needs to pass;

and 5: receiving satellite signals through the integrated antenna, uploading positioning information of the positioning module to a central platform through the communication module and the communication antenna according to an agreed protocol after the positioning module successfully positions, and judging whether the terminal position is in two areas, namely an above-internal area and an off-shore area, and whether cross-border behaviors exist or not by the information processing and control module at fixed time intervals; when the information processing and control module judges that the current terminal positioning position is a national 1 interior region and is not in a national 1 port region range, the cross-border flag bit is set to be 1; when the information processing and control module judges that the current terminal positioning position is in the national 2 interior region and leaves the national 2 port region range, the cross-border flag bit is set to be 2; when the flag bit is changed from 1 to 2, the cross-border behavior of the vehicle from country 1 to country 2 is finished; when the flag bit is changed from 2 to 1, the cross-border behavior of the vehicle from the country 2 to the country 1 is finished, and the current position of the vehicle is marked as the country 1;

step 6: and the information processing and control module enables the corresponding country 1 communication module or country 2 communication module according to the country position marking state to realize automatic switching.

5. The adaptive switching method for communication networks of the cross-border vehicle-mounted management system according to claim 4, wherein in step 3, according to the precision of the positioning module, the range of the area expanded in the inside and outside directions by three times of precision is used as the range of the judgment entry port area.

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