CN111954264B - Transmission method, system and server for airport scene monitoring radar data - Google Patents
Transmission method, system and server for airport scene monitoring radar data Download PDFInfo
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- CN111954264B CN111954264B CN202010718931.0A CN202010718931A CN111954264B CN 111954264 B CN111954264 B CN 111954264B CN 202010718931 A CN202010718931 A CN 202010718931A CN 111954264 B CN111954264 B CN 111954264B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/164—Adaptation or special uses of UDP protocol
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0226—Traffic management, e.g. flow control or congestion control based on location or mobility
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Abstract
The invention provides a method, a system and a server for transmitting airport surface monitoring radar data based on a 4G private network. The transmission method comprises the following steps: acquiring airport scene surveillance radar data; filtering the airport scene monitoring radar data according to the longitude and latitude data and the data content, and reserving the data with the given area range and available content of the airport; merging the reserved data packets; and screening the data packets based on time, combining the data packets and then sending the data packets. By acquiring airport scene monitoring radar data and performing filtering, merging and screening operations on the acquired data, the invention overcomes the defects of wide coverage airspace, large data volume and short single data of the airport scene monitoring radar, ensures that the processed data is more suitable for the transmission of a 4G private network, has low packet loss rate, and can also avoid the interference to airport users caused by the fact that the scene monitoring radar data is introduced into a 4G network to occupy overhigh bandwidth.
Description
Technical Field
The invention relates to the field of airport surface special vehicle operation, in particular to an airport surface monitoring radar data transmission method, an airport surface monitoring radar data transmission system and a server based on a 4G private network.
Background
Airport scene special vehicles are an extremely important link in an air transportation chain, and the normal operation of an aircraft needs the guarantee of various ground service vehicles such as a guide vehicle, a tractor, a ferry vehicle, a luggage transfer vehicle, a food vehicle, a refueling vehicle and the like.
IN order to ensure the running reliability of special vehicles on airport surfaces, the application of special vehicles based on ADS-B IN technology on the airport surface traffic situation perception enhancement technology is available at present, but the application only depends on ADS-B data issued by an aircraft as a single data source, and the following three problems exist under the condition that no other data source is available:
1) the flight number information of the aircraft cannot be obtained due to improper operation of the unit;
2) the ADS-B OUT system is not started according to the requirement of the aircraft, so that the traffic situation information of the aircraft cannot be obtained;
3) partial aircraft ADS-B data caused by scene signal shielding is unavailable;
the three problems are troubling the reliable operation of the special vehicle ADS-B IN traffic situation enhancement system on the airport scene, and when ADS-B data is incomplete or unavailable, the traffic situation information needs to be compensated IN a mode of fusing other data sources by an algorithm.
The supplement of the data of the airport surface surveillance radar is the direction of the current research of the applicant, but the difficulty of the data fusion technology based on the aircraft ADS-B and the airport surface surveillance radar is as follows: the data of the airport scene monitoring radar is required to be preprocessed before being transmitted to a vehicle-mounted end of a special vehicle of the airport scene, so that the airport scene monitoring radar is more suitable for transmission of a 4G private network, and more effective compensation is formed for data fused with an aircraft ADS-B.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, a system, and a server for transmitting airport surface surveillance radar data based on a 4G private network, which at least partially solve the problems in the prior art.
In a first aspect, the invention provides a method for transmitting airport surface surveillance radar data based on a 4G private network, which is used for transmitting the airport surface surveillance radar data, and the transmitted data is fused with ADS-B data of an aircraft at a vehicle-mounted end of a special vehicle on the airport surface, and the method for transmitting the airport surface surveillance radar data comprises the following steps:
the method comprises the steps of obtaining airport scene monitoring radar data, wherein the data comprise flight numbers and longitude and latitude position information corresponding to each flight;
filtering, namely filtering the airport scene monitoring radar data according to the longitude and latitude data and the data content, and reserving data with a given area range and available content of an airport;
a merging step, merging the reserved data packets;
and a screening step, namely screening the data packets based on time, combining the data packets and then sending the data packets.
Further, in the above transmission method, the filtering step includes: predefining the longitude and latitude of each point of a polygon to enable the polygon to cover the airport and the specified surrounding environment thereof; and judging whether the corresponding aircraft is positioned in the polygon or not according to the latitude and longitude information contained in the airport scene monitoring radar data, and if not, discarding the scene monitoring radar data of the aircraft.
Further, in the above transmission method, the combining step includes: the plurality of UDP packets are combined into 1 UDP packet.
Further, in the above transmission method, the combining step further includes: and filling the merged UDP packet with blank data.
Further, in the above transmission method, the screening step is: appointing 4n-1 to 4n seconds of data packets and then sending the packets; wherein n is a natural number.
In a second aspect, the invention discloses a 4G private network-based airport surface surveillance radar data transmission system, which is used for transmitting airport surface surveillance radar data, and the transmitted data is fused with ADS-B data of an aircraft at a vehicle-mounted end of a special vehicle on an airport surface, and the transmission system comprises: the device comprises an obtaining module, a filtering module, a merging module and a screening module. The acquisition module is used for acquiring airport scene monitoring radar data, wherein the data comprises flight numbers and longitude and latitude position information corresponding to each flight; the filtering module is used for filtering the airport scene monitoring radar data according to the longitude and latitude data and the data content, and reserving data with a given area range and available content of an airport; the merging module is used for merging the reserved data packets; the screening module is used for screening the data packets based on time, combining the data packets and then sending the data packets.
Further, in the above transmission system, the filter module includes: a polygon specifying unit and a filtering unit. The polygon specifying unit is used for predefining the longitude and latitude of each point of a polygon so that the polygon covers the airport and the specified surrounding environment thereof; the filtering unit is used for judging whether the corresponding aircraft is positioned in the polygon or not according to the latitude and longitude information contained in the airport scene monitoring radar data, and if not, the scene monitoring radar data of the aircraft are discarded; the merging module is further configured to merge the plurality of UDP packets into 1 UDP packet.
Further, in the above transmission system, the merging module is further configured to fill the merged UDP packet with blank data.
Further, in the transmission system, the screening module is configured to designate data packets occurring in 4n-1 to 4n seconds to be included and then to send the data packets; wherein n is a natural number.
In a third aspect, the present invention further provides a server, including at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform any of the aforementioned methods of 4G private network-based airport surface surveillance radar data transmission.
The airport surface monitoring radar data transmission method based on the 4G private network overcomes the defects of wide coverage airspace, large data volume and short single data of the airport surface monitoring radar by obtaining the airport surface monitoring radar data and carrying out filtering, merging and screening on the obtained data, so that the processed data is more suitable for the transmission of the 4G private network, the packet loss rate is low, and the interference to airport users caused by the fact that the 4G network occupies too high bandwidth due to the introduction of the airport surface monitoring radar data can be avoided.
When the processed airport scene surveillance radar data is fused with the ADS-B data of the aircraft of the airport scene special vehicle, the ADS-B data is used as a base, the surveillance data is used for carrying out data supplement, data correction and data enhancement on the airport scene surveillance radar data, and the defect that the operation of the airport scene special vehicle is guaranteed by only depending on the ADS-B data of the aircraft is overcome, so that the special vehicle can operate more reliably.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flowchart illustrating steps of a method for transmitting airport surface surveillance radar data based on a 4G private network according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating the steps of filtering in the method for transmitting airport surface surveillance radar data based on the 4G private network according to the embodiment of the present invention;
fig. 3 is a schematic diagram of a working principle of time-based screening in a method for transmitting airport surface surveillance radar data based on a 4G private network according to an embodiment of the present invention;
FIG. 4 is a block diagram of a transmission system for airport surface surveillance radar data based on a 4G private network according to an embodiment of the present invention;
FIG. 5 is a block diagram of a filtering module in the airport surface surveillance radar data transmission system based on the 4G private network according to the embodiment of the present invention;
fig. 6 is a schematic diagram illustrating the working principle of data transmission between a service end and a special vehicle on an airport surface according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The implementation planning of the civil aviation ADS-B aims to realize the comprehensive operation of the transportation aviation ADS-B OUT. But a few flights still exist in the actual operation process and do not operate the ADS-B OUT system according to the requirements. Therefore, a method and a system are reasonably adopted to fuse the aircraft ADS-B data with airport scene monitoring radar data accurately carrying aircraft flight number and model information. But the airport scene monitoring radar data is transmitted to the vehicle-mounted end of the special vehicle, so that the problem exists.
Before the above specific problems are explained, it is to be laid down that some airports are provided with an airport mobile 4G private network, which is integrated into a national mobile 4G network and uses a VPN-like technology to implement a 4G network environment in which an airport local area network is isolated from an external network. That is, airport 4G private network users can communicate nationwide and do not cross-link data with the external network.
The applicant finds that through performance tests on the airport mobile 4G private network, when transmitting UDP protocol data packets at a high rate, the airport mobile 4G private network has a situation that packet loss rate of small-volume packets is high (about 45% packet loss rate), and large-volume packets are normally transmitted (0% packet loss rate). Because the original scene surveillance radar data of the airport accords with the characteristics of high-speed and small-volume UDP data packets, special processing needs to be carried out on the data during actual transmission.
Meanwhile, the applicant also finds that as other users in the airport use the airport mobile 4G private network, the introduction of the field monitoring radar data causes the data to occupy too high bandwidth and generate interference to other users.
Referring to fig. 1, fig. 1 is a flowchart of steps of a transmission method of airport surface surveillance radar data based on a 4G private network according to an embodiment of the present invention, which is used for transmitting the airport surface surveillance radar data, and fusing the transmitted data with ADS-B data of an aircraft at a vehicle-mounted end of a special vehicle at the airport surface, and includes the following steps:
an obtaining step S110, obtaining airport scene monitoring radar data, wherein the data comprises flight numbers and longitude and latitude position information corresponding to each flight;
a filtering step S120, filtering the airport scene monitoring radar data according to the longitude and latitude data and the data content, and reserving the data with the given area range and available content of the airport;
a merging step S130, merging the reserved data packets;
a filtering step S140, filtering the data packets based on time, merging the data packets, and transmitting the merged data packets.
The obtaining step S110, the filtering step 120, the merging step 130, and the screening step 140 are performed for a server capable of receiving airport scene surveillance radar data.
Further, referring to fig. 2, the filtering step S120 may be implemented by:
step S1201, pre-defining the longitude and latitude of each point of a polygon to enable the polygon to cover the airport and the surrounding environment thereof;
step S1202, determine whether the aircraft is in the polygon, if not, discard the radar data for the scene monitoring of the aircraft.
Further, the merging step S130 may be implemented by: the plurality of UDP packets are combined into 1 UDP packet. And, in a more preferred embodiment, the merging step further comprises padding said merged UDP packet with blank data. That is to say, because the UDP transmission in some airport 4G private networks has the problem of serious packet loss of small volume packets, the 4G private network can be adapted in a manner of merging multiple UDP packets into 1 UDP packet. If the amount of data is too small, the merged large-volume UDP packet is also filled with blank data.
Because the data transmission frequency of the scene monitoring radar is once per second, and the requirement of the vehicle-mounted application on the data frequency of the scene monitoring radar can be properly reduced, the data screening method based on time can be adopted to reduce the transmission frequency. In one embodiment, the screening step may be: appointing 4n-1 to 4n seconds of data packets and then sending the packets; wherein n is a natural number. That is, only the data appearing from the 3 rd second to the 4 th second are combined and then sent to the vehicle-mounted terminal through the 4G private network, and then the data appearing from the 7 th second and the 8 th second are combined and then sent to the vehicle-mounted terminal through the 4G private network, and the steps are repeated. As shown with reference to fig. 3.
In the method for transmitting airport surface surveillance radar data based on the 4G private network, by obtaining the airport surface surveillance radar data and performing the operations of filtering, merging and screening on the obtained data, the defects that the airport surface surveillance radar has wide coverage airspace, large data volume and short single data are overcome, so that the processed data is more suitable for transmission of the 4G private network, the packet loss rate is low, and the interference to airport users caused by the fact that the 4G network occupies too high bandwidth due to the introduction of the airport surface surveillance radar data can be avoided.
In a second aspect, the present invention further discloses an embodiment of a transmission system for airport surface surveillance radar data based on a 4G private network, which is used for transmitting the airport surface surveillance radar data, and the transmitted data is fused with ADS-B data of an aircraft at a vehicle-mounted end of a special vehicle at an airport surface, and referring to fig. 4, a structural block diagram of the embodiment of the transmission system is shown, and the structural block diagram includes:
an obtaining module 40, configured to obtain airport scene monitoring radar data, where the data includes flight numbers and longitude and latitude position information corresponding to each flight;
the filtering module 41 is configured to filter the airport scene surveillance radar data according to the longitude and latitude data and the data content, and reserve data in a given area range of the airport and available content;
a merging module 42, configured to merge the reserved data packets;
and the screening module is used for screening the merged data packet based on time.
The obtaining module 40, the filtering module 41, the merging module 42, and the filtering module 43 are executed by a server capable of receiving airport scene surveillance radar data.
Further, referring to fig. 5, in one embodiment, the filtering module may include: a polygon specification unit 411 and a filtering unit 412. A polygon specifying unit 411, configured to customize the longitude and latitude of each point of a polygon in advance, so that the polygon covers an airport and its surrounding environment; the filter unit 412 is used to determine whether the aircraft is within the polygon, and if not, the surveillance radar data for the scene of the aircraft is discarded.
The merge module 42 is further configured to: the plurality of UDP packets are combined into 1 UDP packet. And, in a more preferred embodiment, the merging step further comprises padding said merged UDP packet with blank data. That is to say, because the UDP transmission in some airport 4G private networks has the problem of serious packet loss of small volume packets, the 4G private network can be adapted in a manner of merging multiple UDP packets into 1 UDP packet. If the amount of data is too small, the merged large-volume UDP packet is also filled with blank data.
Because the data transmission frequency of the scene monitoring radar is once per second, and the requirement of the vehicle-mounted application on the data frequency of the scene monitoring radar can be properly reduced, the data screening method based on time can be adopted to reduce the transmission frequency. In one embodiment, the screening step may be: appointing 4n-1 to 4n seconds of data packets and then sending the packets; wherein n is a natural number. That is, only the data appearing from the 3 rd second to the 4 th second are combined and then sent to the vehicle-mounted terminal through the 4G private network, and then the data appearing from the 7 th second and the 8 th second are combined and then sent to the vehicle-mounted terminal through the 4G private network, and the steps are repeated. As shown with reference to fig. 3.
In the airport surface monitoring radar data transmission system based on the 4G private network, by obtaining airport surface monitoring radar data and performing filtering, merging and screening operations on the obtained data, the defects that the airport surface monitoring radar has wide coverage airspace, large data volume and short single data are overcome, the processed data are more suitable for transmission of the 4G private network, the packet loss rate is low, and the interference to airport users caused by the fact that the 4G network occupies too high bandwidth due to introduction of the surface monitoring radar data can be avoided.
When the processed airport scene surveillance radar data is fused with the ADS-B data of the aircraft of the airport scene special vehicle, the ADS-B data is used as a base, the surveillance data is used for carrying out data supplement, data correction and data enhancement on the airport scene surveillance radar data, and the defect that the operation of the airport scene special vehicle is guaranteed by only depending on the ADS-B data of the aircraft is overcome, so that the special vehicle can operate more reliably.
In the airport surface monitoring radar data transmission system based on the 4G private network, by obtaining airport surface monitoring radar data and performing filtering, merging and screening operations on the obtained data, the defects that the airport surface monitoring radar has wide coverage airspace, large data volume and short single data are overcome, the processed data are more suitable for transmission of the 4G private network, the packet loss rate is low, and the interference to airport users caused by the fact that the 4G network occupies too high bandwidth due to introduction of the surface monitoring radar data can be avoided.
In a third aspect, the present invention further provides an embodiment of a server, and referring to fig. 6, fig. 6 is a schematic diagram illustrating an operation principle of data transmission between the server and a special vehicle in an airport scene. Wherein the server 1 comprises a plurality of airport surface surveillance radars 10, at least one processor 20; and a memory 30 communicatively coupled to the at least one processor 20. Wherein the memory 30 stores instructions executable by the at least one processor 20 to enable the at least one processor 20 to perform the aforementioned method of transmitting airport surface surveillance radar data based on 4G private network.
The processor 20 transmits the processed airport surface surveillance radar data to the onboard end 2 of the airport surface special vehicle. When the processed airport scene surveillance radar data is fused with the ADS-B data of the aircraft of the airport scene special vehicle, the ADS-B data is used as a base, the surveillance data is used for carrying out data supplement, data correction and data enhancement on the airport scene surveillance radar data, and the defect that the operation of the airport scene special vehicle is guaranteed by only depending on the ADS-B data of the aircraft is overcome, so that the special vehicle can operate more reliably.
Since the embodiment of the transmission method of the airport surface surveillance radar data based on the 4G private network has been described above, the detailed description of the present application is omitted.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A transmission method of airport surface monitoring radar data based on a 4G private network is used for transmitting the airport surface monitoring radar data, and the transmitted data is fused with ADS-B data of an aircraft at a vehicle-mounted end of a special vehicle at the airport surface, and is characterized by comprising the following steps:
the method comprises the steps of obtaining airport scene monitoring radar data, wherein the data comprise flight numbers and longitude and latitude position information corresponding to each flight;
filtering, namely filtering the airport scene monitoring radar data according to the longitude and latitude data and the data content, and reserving data with a given area range and available content of an airport;
a merging step, merging the reserved data packets;
and a screening step, namely screening the data packets based on time, combining the data packets and then sending the data packets.
2. The transmission method according to claim 1, wherein the filtering step comprises:
predefining the longitude and latitude of each point of a polygon to enable the polygon to cover the airport and the specified surrounding environment thereof;
and judging whether the corresponding aircraft is positioned in the polygon or not according to the latitude and longitude information contained in the airport scene monitoring radar data, and if not, discarding the scene monitoring radar data of the aircraft.
3. The transmission method according to claim 2, wherein the combining step comprises:
the plurality of UDP packets are combined into 1 UDP packet.
4. The transmission method according to claim 3, wherein the combining step further comprises: and filling the merged UDP packet with blank data.
5. The transmission method according to claim 4, wherein the screening step is: appointing 4n-1 to 4n seconds of data packets and then sending the packets; wherein n is a natural number.
6. A4G private network-based airport surface surveillance radar data transmission system is used for transmitting airport surface surveillance radar data, and the transmitted data is fused with ADS-B data of aircrafts on vehicle-mounted ends of special vehicles on the airport surface, and the transmission system is characterized by comprising:
the system comprises an obtaining module, a processing module and a processing module, wherein the obtaining module is used for obtaining airport scene monitoring radar data, and the data comprises flight numbers and longitude and latitude position information corresponding to each flight;
the filtering module is used for filtering the airport scene monitoring radar data according to the longitude and latitude data and the data content, and reserving data with a given area range and available content of an airport;
the merging module is used for merging the reserved data packets;
and the screening module is used for screening the data packets based on time, combining the data packets and then sending the data packets.
7. The transmission system according to claim 6, wherein the filtering module comprises:
a polygon specifying unit for specifying the latitude and longitude of each point of a polygon in advance so that the polygon covers the airport and the specified surrounding environment thereof;
the filtering unit is used for judging whether the corresponding aircraft is positioned in the polygon or not according to the latitude and longitude information contained in the airport scene monitoring radar data, and if not, the scene monitoring radar data of the aircraft are discarded;
the merging module is further configured to merge the plurality of UDP packets into 1 UDP packet.
8. The transmission system according to claim 7, wherein the merging module is further configured to fill the merged UDP packet with blank data.
9. The transmission system according to claim 8, wherein the screening module is configured to designate the packets of data occurring in 4n-1 to 4n seconds to be sent after the packets are combined; wherein n is a natural number.
10. A server, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of transmitting 4G private network-based airport surface surveillance radar data of any of claims 1-5.
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| US10302759B1 (en) * | 2013-03-05 | 2019-05-28 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Automatic dependent surveillance broadcast (ADS-B) system with radar for ownship and traffic situational awareness |
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