CN114339920A - Cross-border vehicle-mounted management system and communication network self-adaptive switching method - Google Patents
Cross-border vehicle-mounted management system and communication network self-adaptive switching method Download PDFInfo
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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
Technical Field
The invention belongs to the technical field of satellite navigation systems, and relates to a self-adaptive switching method for realizing communication networks of different countries across border terminals in a cross-border process in a cross-border vehicle-mounted management system. The method is used for detecting the behavior of the vehicle entering and exiting a national boundary line in real time on the premise of not influencing the communication performance during cross-border driving of the vehicle, adaptively selecting a communication network of a corresponding country for transmitting data such as positions and texts according to the position of the vehicle, and realizing the adaptive switching of the communication network in the cross-border process.
Background
In the process of cross-border transportation, the supervision means of cross-border vehicles, particularly inbound vehicles, is weak. Meanwhile, the phenomena of untimely rescue and the like caused by the problems of languages, mechanism setting and the like are caused by the safety rescue of personnel and vehicles in the operation process of international road transport vehicles, and the problems are all the problems which need to be solved urgently at present.
In the aspect of vehicle monitoring in a single country, the terminal with a satellite positioning system and a national public network communication module can be applied, and the monitoring and scheduling functions of the vehicle are realized by combining an intelligent platform system. The scheme can achieve the aim of vehicle management in the cross-border use process, communication networks of different countries need to be switched, the characteristic of overhigh mobile roaming cost exists, great economic burden is brought to users, and batch popularization and application are hindered. In addition, two vehicle-mounted terminals can be arranged on a single cross-border vehicle to respectively support communication systems of two countries inside and outside the country, so that the function of monitoring and managing the vehicle in cross-border operation is achieved. But this scheme possesses the communication price height, and the installation is complicated, to the characteristics of vehicle mounted position higher requirement. Therefore, it is necessary to use a cross-border communication network adaptive strategy which is convenient to install and intelligent to switch.
Disclosure of Invention
Technical problem to be solved
The invention provides a cross-border vehicle-mounted management system and a communication network self-adaptive switching method, aiming at solving the problems of high cost and unstable switching in cross-border communication in the prior art. The design of the cross-border vehicle-mounted terminal in international road transportation is simplified, the use cost is reduced, and the functionality, the use convenience and the low cost of the cross-border vehicle-mounted terminal communication are considered.
Technical scheme
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.
The further technical scheme of the invention is as follows: the cross-border vehicle-mounted communication positioning terminal supports Beidou, GPS and GLONASS positioning.
The further technical scheme of the invention is as follows: the cross-border vehicle-mounted communication positioning terminal comprises a Beidou/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 Beidou/GLONASS/GPS antenna receives signals sent by a Beidou/GLONASS/GPS satellite system and transmits the signals to the positioning module, the positioning module transmits positioning information to the information processing and control module, and on one hand, the information processing and control module utilizes the communication module to communicate position information with a central platform through the communication antenna and on the other hand, the information processing and control module transmits the position information to other peripheral equipment needing the 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.
A communication network self-adaptive switching method of a cross-border vehicle-mounted management system is characterized by comprising the following steps:
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.
The further technical scheme of the invention is as follows: and 3, according to the precision of the positioning module, taking the range of the region with three times of enlarged precision in the inner and outer directions as the range of the region entering the port.
Advantageous effects
According to the cross-border vehicle-mounted management system and the communication network self-adaptive switching method, through reasonable division of cross-border areas, the positions of the cross-border vehicle-mounted positioning communication terminals are detected and marked in real time, cross-border behaviors of the terminals are 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. Has the following beneficial effects:
1. the communication module is additionally arranged on the structure of the single communication module of the universal vehicle-mounted terminal, so that the communication functions of the countries 1 and 2 on two sides of the cross border are respectively realized, the structure and the connection relation of the existing system are not changed, the operation is simple, the realization is easy, and the cost is controlled to be in the lowest state.
2. When the switching is carried out to a corresponding country region after crossing, the strategy of enlarging the cross-border behavior judgment region is adopted, and the robustness of the switching jitter of the communication network is improved.
3. And the position of the terminal is periodically detected, and the communication network is selected according to the cross-border behavior completion identification. And judging whether the terminal crosses into another country region and stably enters into another country region, and judging the completion of the cross-border behavior through a mark. And the judgment is converted into digital judgment, so that the visual judgment is visual and is not easy to make mistakes.
4. The method comprises the steps of pre-constructing an internal region and an external region and storing the internal region and the external region into an information processing and control module, accurately acquiring positioning information through a positioning module, judging a vehicle according to the positioning information, detecting and marking the position of a cross-border vehicle-mounted positioning communication terminal in real time, and automatically executing a communication network switching strategy.
5. The area to which the mobile terminal belongs is judged through the position information, then the communication module corresponding to the corresponding area is used for communication, the stable communication network is used in the cross-border process through the cross-border area division, the situation that the communication quality is poor due to frequent network switching in the port area is avoided, and the mobile terminal has the advantages of stable communication quality and low cost.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a cross-border vehicle monitoring system composition diagram;
FIG. 2 is a block diagram of a cross-border vehicle-mounted communication positioning terminal;
fig. 3 a communication network adaptive handover method;
fig. 4 is a schematic diagram of the determination region inside and outside the cross-border port.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may 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 in 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-mounted positioning communication terminal is connected with the central platform through a public communication network. The terminal supports Beidou, GPS and GLONASS positioning, is provided with a dual communication module, and can send the real-time position to the central platform through public network communication. The central platform is the core of the monitoring system, can receive the position and the image information of the vehicle-mounted terminal through a wireless network, realizes audio-video bidirectional interaction, and displays the position of a vehicle through a GIS system.
As shown in fig. 2, the cross-border vehicle-mounted positioning communication terminal communication part is composed of two communication modules. The mid-span vehicle-mounted communication positioning terminal consists of a satellite receiving antenna, a communication module, a positioning module, an information processing and control module, an interface circuit and a power supply management module. The terminal supports Beidou, GPS and GLONASS positioning, is provided with a dual communication module, and can send the real-time position to the central platform through public network communication. The Beidou/GLONASS/GPS antenna receives signals sent by the Beidou/GLONASS/GPS satellite system, the signals are transmitted to the Beidou/GLONASS/GPS positioning module to be processed to obtain positioning information, the positioning module transmits the positioning information to the information processing and controlling module, on one hand, the information processing and controlling module utilizes the communication module to communicate position information and text information with the central platform through the communication antenna, and on the other hand, the information is transmitted to other peripherals needing the 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 center platform is the core of the monitoring system, a B/S architecture is adopted, the server is deployed in the user management center, the position information of the vehicle-mounted terminal can be received through a wireless network, and the position of the vehicle is displayed.
The communication network self-adaptive switching method in the cross-border vehicle-mounted management system is characterized in that the country where the vehicle is located is calculated through the current longitude and latitude by means of the thought of an electronic map, and the current position of the vehicle is accurately judged to be in the interior or out of the country. The core technology is that the electronic map is divided into a plurality of areas according to national boundaries, and the area in which the position is located is judged according to the current longitude and latitude. However, because the computing power of the vehicle-mounted terminal is limited, the whole electronic map cannot be built in, and therefore the judgment of the area can be simplified according to the specific position of each port, and cross-border judgment is achieved.
As shown in fig. 3, the adaptive switching method of the communication network in the cross-border vehicle-mounted management system according to the present invention is implemented by cross-border vehicle-mounted terminal controller software. The working flow of the cross-border communication network switching method is as follows:
(1) and deriving the administrative region boundary points of the region according to the actual positions of the ports involved in the cross-border vehicle journey.
(2) Several coordinate points near the port are selected as border lines across the border of the administrative area.
(3) As shown in fig. 4, polygonal regions are drawn from the border line to both sides, and the regions should cover the entire port 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 the inner and outer directions to be the port area range.
(4) And according to the specific port through which the vehicle needs to pass, issuing the internal region and the external region of the port to the terminal through the USB interface or the platform, judging whether the initial region information exists by the terminal, judging whether the newly received region information is consistent with the stored region information by the terminal, and if not, re-storing the region information.
(5) And after the terminal is successfully positioned, judging whether the position of the terminal is in the two areas or not and whether cross-border behaviors exist or not at fixed time intervals. When the terminal is judged to be located in the national 1 interior region and not in the national 1 port region range, the terminal cross-border flag bit is 1; and when the terminal is judged to be located in the national 2 interior region and leaves the national 2 port region range, the terminal cross-border flag bit is 2. When the flag changes from 1 to 2, it indicates that the cross-country behavior of the vehicle from country 1 to country 2 is completed. When the flag bit is changed from 2 to 1, indicating that the cross-border behavior of the vehicle from country 2 to country 1 is completed, the current position of the vehicle is marked as country 1.
(6) And enabling the corresponding communication module according to the state of the country position label to realize automatic switching.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present disclosure.
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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