WO2022017016A1 - 基于广播的差分数据播发方法、装置、设备及存储介质 - Google Patents

基于广播的差分数据播发方法、装置、设备及存储介质 Download PDF

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Publication number
WO2022017016A1
WO2022017016A1 PCT/CN2021/098395 CN2021098395W WO2022017016A1 WO 2022017016 A1 WO2022017016 A1 WO 2022017016A1 CN 2021098395 W CN2021098395 W CN 2021098395W WO 2022017016 A1 WO2022017016 A1 WO 2022017016A1
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WIPO (PCT)
Prior art keywords
broadcast
current
coverage area
information
differential data
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PCT/CN2021/098395
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English (en)
French (fr)
Inventor
翦林鹏
朱钧
尹华镜
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深圳思凯微电子有限公司
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Publication of WO2022017016A1 publication Critical patent/WO2022017016A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/38—Arrangements for distribution where lower stations, e.g. receivers, interact with the broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/42—Arrangements for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/49—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying locations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/68—Systems specially adapted for using specific information, e.g. geographical or meteorological information
    • H04H60/70—Systems specially adapted for using specific information, e.g. geographical or meteorological information using geographical information, e.g. maps, charts or atlases

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a broadcast-based differential data broadcasting method, apparatus, device, and storage medium.
  • Location-based services based on navigation satellites are widely used in various fields. With the development of user experience, the development of emerging industries, and the upgrading of standardized management requirements, location-based services have higher and higher requirements for positioning accuracy.
  • a typical way to improve the accuracy of satellite navigation and positioning is to establish a ground-based augmentation system, that is, ground-based augmentation systems (GBAS). usability, positioning accuracy, etc.
  • the ground-based augmentation system is mainly composed of Continuously Operating Reference Stations (CORS), data broadcasting system and user terminal.
  • CORS Continuously Operating Reference Stations
  • the CORS station is a fixed station on the ground. It generates differential correction data according to the satellite signal received in real time, and transmits it to a specific user through the data broadcasting system.
  • the user terminal corrects the positioning information according to the obtained differential correction data.
  • the effect of the user terminal directly using the differential data broadcast by the CORS station to improve the positioning accuracy will also deteriorate.
  • the differential data broadcast method based on the mobile communication network is network RTK, and the carrier phase differential technology (Real time kinematic, RTK) can generate a virtual reference station technology (Virtual Reference Station, VRS) according to the approximate location uploaded by the user, so as to solve the problem between user terminals and CORS.
  • VRS Virtual Reference Station
  • the effect of the distance between stations baseline distance.
  • mobile communication networks have many constraints, such as limited user capacity, low concurrency, high usage costs, and limited signal coverage, making it difficult to support large-scale applications.
  • Broadcast RTK based on broadcast has unlimited user capacity, but due to the lack of backhaul channels, it can only work in single base station mode at present, and the enhancement effect of differential data becomes worse as the baseline distance increases.
  • the main purpose of this application is to provide a broadcast-based differential data broadcasting method, device, equipment and storage medium, which aims to solve the problem that broadcasting technology cannot perform positioning like network RTK due to the lack of a return channel, resulting in low positioning accuracy of broadcasting technology. technical issues.
  • the present application provides a broadcast-based differential data broadcast method, the method includes the following steps:
  • the current broadcast station information, the neighboring broadcast station information, the target meshing information, and the differential data are broadcast.
  • the step of determining the current broadcast station information according to the current broadcast coverage area and determining the adjacent broadcast station information according to the adjacent broadcast coverage area includes:
  • the general information of the neighboring broadcasting station and the coverage information of the neighboring broadcasting station are encapsulated to obtain the neighboring broadcasting station information.
  • the step of determining the coverage information of the current broadcast station according to the current broadcast coverage area includes:
  • the current broadcast station coverage information is determined according to the center point, the number and the relative distance.
  • the step of determining the center point of the current broadcast coverage area according to the current broadcast coverage area includes:
  • the center point of the current broadcast coverage area is determined according to the target longitude and the target latitude.
  • the step of dividing the current broadcast coverage area into a plurality of grid intervals, and determining target grid division information according to the division result includes:
  • the target meshing information is determined according to the division result.
  • the step of sequentially dividing the long side of the region and the short side of the region to obtain multiple grid intervals includes:
  • a plurality of grid intervals are determined according to the area bisectors.
  • the method further includes:
  • the current grid number is compared with a preset number, and the preset distance is adjusted according to the comparison result.
  • the present application also proposes a broadcast-based differential data broadcast device, the broadcast-based differential data broadcast device includes:
  • the acquisition module is used to acquire the current broadcast coverage area and the adjacent broadcast coverage area;
  • an extraction module configured to determine current broadcast station information according to the current broadcast coverage area, and determine adjacent broadcast station information according to the adjacent broadcast coverage area;
  • a division module configured to divide the current broadcast coverage area into a plurality of grid intervals, and determine target grid division information according to the division result;
  • the generating module is used to generate corresponding virtual reference stations in each grid interval, and obtain differential data generated by each virtual reference station;
  • a broadcasting module configured to broadcast the current broadcasting station information, the neighboring broadcasting station information, the target meshing information and the differential data.
  • the present application also proposes a broadcast-based differential data broadcast device, the broadcast-based differential data broadcast device includes: a memory, a processor, and a device stored in the memory and available in the processor
  • a broadcast-based differential data broadcast program running on the broadcast-based differential data broadcast program is configured to implement the steps of the broadcast-based differential data broadcast method as described above.
  • the present application also proposes a storage medium, where a broadcast-based differential data broadcast program is stored on the storage medium, and the broadcast-based differential data broadcast program is implemented as described above when executed by a processor. The steps of the broadcast-based differential data broadcast method.
  • the current broadcast coverage area and the adjacent broadcast coverage area are obtained; the current broadcast station information is determined according to the current broadcast coverage area, and the adjacent broadcast station information is determined according to the adjacent broadcast coverage area; the current broadcast coverage area is divided into multiple grid intervals, according to The division result determines the target grid division information; respectively generates corresponding virtual reference stations in each grid interval, and obtains the differential data generated by each virtual reference station; divides the current broadcast station information, neighboring broadcast station information, and target grid division information
  • the present application broadcasts the current broadcasting station information, neighboring broadcasting station information, target grid division information and differential data together to improve the positioning accuracy of the broadcasting-based differential data broadcasting technology.
  • FIG. 1 is a schematic structural diagram of a broadcast-based differential data broadcasting device of the hardware operating environment involved in the solution of the embodiment of the present application.
  • FIG. 2 is a schematic flowchart of the first embodiment of the broadcast-based differential data broadcasting method of the present application.
  • FIG. 3 is a schematic diagram of a positioning scenario according to the first embodiment of the broadcast-based differential data broadcasting method of the present application.
  • FIG. 4 is a schematic flowchart of a second embodiment of a broadcast-based differential data broadcasting method of the present application.
  • FIG. 5 is a schematic diagram of boundary point selection according to the second embodiment of the broadcast-based differential data broadcasting method of the present application.
  • FIG. 6 is a schematic flowchart of a third embodiment of a broadcast-based differential data broadcasting method of the present application.
  • FIG. 7 is a schematic diagram of grid division of a third embodiment of a broadcast-based differential data broadcasting method of the present application.
  • FIG. 8 is a structural block diagram of a first embodiment of a broadcast-based differential data broadcasting apparatus of the present application.
  • FIG. 1 is a schematic structural diagram of a broadcast-based differential data broadcasting device of the hardware operating environment involved in the solution of the embodiment of the present application.
  • the broadcast-based differential data broadcasting device may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005.
  • the communication bus 1002 is used to realize the connection and communication between these components.
  • the user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface.
  • the network interface 1004 may include a standard wired interface and a wireless interface (eg, a Wireless-Fidelity (WI-FI) interface).
  • WI-FI Wireless-Fidelity
  • the memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory.
  • RAM Random Access Memory
  • NVM Non-Volatile Memory
  • the memory 1005 may also be a storage device independent of the aforementioned processor 1001 .
  • FIG. 1 does not constitute a limitation on the broadcast-based differential data broadcasting device, and may include more or less components than the one shown, or combine some components, or different Component placement.
  • the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module and a broadcast-based differential data broadcasting program.
  • the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; in the broadcast-based differential data broadcasting device of the present application
  • the processor 1001 and the memory 1005 can be set in the broadcast-based differential data broadcast device, and the broadcast-based differential data broadcast device calls the broadcast-based differential data broadcast program stored in the memory 1005 through the processor 1001, and executes the present application
  • the broadcast-based differential data broadcast method provided by the embodiment
  • FIG. 2 is a schematic flowchart of a first embodiment of a broadcast-based differential data broadcast method of the present application.
  • the broadcast-based differential data broadcasting method includes the following steps:
  • Step S10 Acquire the current broadcast coverage area and the adjacent broadcast coverage area.
  • the executive body of this embodiment is a broadcast data broadcasting device, and the broadcast data broadcasting device may be a terminal device or other device, which is not limited in this embodiment.
  • a neighboring broadcasting station is defined as starting from any position of the current broadcasting station, continuously moving in a certain direction, and entering the coverage area of any other broadcasting station for the first time after leaving the coverage area of the current broadcasting station.
  • the broadcasting station is called a neighboring broadcasting station, the current number of broadcasting stations is one, and the number of neighboring broadcasting stations is more than one.
  • X 1 is the current broadcasting station
  • X 2 is one of the neighboring broadcasting stations of X 1
  • Y is the user terminal
  • R 1 is the current broadcasting station corresponding to the current broadcasting station X 1.
  • the broadcast coverage area R 2 is the current broadcast coverage area corresponding to the adjacent broadcast station X 2
  • the location of the user terminal Y corresponds to the location of the user
  • the current broadcast station X 1 is the broadcast station in the area where the user terminal Y is located.
  • X 1 is the current broadcasting station currently broadcasting the coverage area R 1
  • X 1 to the current broadcast station transmitting differential data in real time to the user terminal Y, the user terminal Y positioning itself corrects the differential data received.
  • Step S20 Determine current broadcast station information according to the current broadcast coverage area, and determine adjacent broadcast station information according to the adjacent broadcast coverage area.
  • the general information of the current broadcast station and the general information of the adjacent broadcast stations can be determined according to the latitude and longitude range of the current broadcast coverage area and the adjacent broadcast coverage area and the mode frequency point information. For the coverage area boundary of the current broadcasting station and the neighboring broadcasting station, select the boundary point according to the angle interval to the center point, and obtain the coverage information of the current broadcasting station and the neighboring broadcasting station, and compare the general information of the current broadcasting station with the current broadcasting station. The coverage information is encapsulated to obtain the current broadcasting station information, and the neighboring broadcasting station general information and the neighboring broadcasting station coverage information are encapsulated to obtain the neighboring broadcasting station information.
  • Step S30 Divide the current broadcast coverage area into a plurality of grid intervals, and determine target grid division information according to the division result.
  • this embodiment solves this problem by dividing the broadcast coverage area, specifically, dividing the broadcast coverage area into multiple grid intervals. , so the broadcast coverage area is divided into grid intervals according to the preset distance, wherein the preset distance is the distance between the center points of the two grid intervals.
  • the target grid division information can be obtained according to the division result of each grid interval.
  • Step S40 Generate corresponding virtual reference stations in each grid interval respectively, and acquire differential data generated by each virtual reference station.
  • the center position of each grid interval can be determined according to the grid division, a virtual reference station is generated at each center position, and the data generated by each virtual reference station can be obtained. differential data.
  • Step S50 Broadcast the current broadcasting station information, the neighboring broadcasting station information, the target meshing information and the differential data.
  • the current broadcast coverage area and the adjacent broadcast coverage area are obtained; the current broadcast station information is determined according to the current broadcast coverage area, and the adjacent broadcast station information is determined according to the adjacent broadcast coverage area; the current broadcast coverage area is divided into a plurality of grid intervals, Determine the target grid division information according to the division result; generate corresponding virtual reference stations in each grid interval, and obtain the differential data generated by each virtual reference station; divide the current broadcast station information, neighboring broadcast station information, and target grid The information and differential data are broadcasted.
  • the current broadcast station information, neighboring broadcast station information, target grid division information and differential data are broadcast together to improve the positioning accuracy of the broadcast-based differential data broadcast technology.
  • FIG. 4 is a schematic flowchart of a second embodiment of a broadcast-based differential data broadcasting method of the present application.
  • the step S20 includes:
  • Step S201 Determine the general information of the current broadcast station according to the current broadcast coverage area, and determine the general information of the adjacent broadcast stations according to the adjacent broadcast coverage area.
  • the general information of the broadcasting station includes the identification number of the broadcasting station, the identification of the broadcasting station (wherein the identification of the current broadcasting station is 1, and the identification of the neighboring broadcasting station is 0), the signal spectrum mode, and the frequency of the broadcasting station. After the current broadcast coverage area is exceeded, it is necessary to switch to the adjacent broadcast station for positioning. Therefore, in this embodiment, the general information of the current broadcast station and the general information of the adjacent broadcast stations are broadcast together, so that the user terminal can switch the frequency point from the current broadcast station. to a nearby radio station.
  • Signal spectrum modes include 0x00->I1, 0x01->I2, 0x02->I3, 0x03->I4, 0x10->II1, 0x11->II2, 0x12->II, 0x13->II4, etc.
  • the unit is 10 ⁇ -2MHz, for example, the frequency value 10200 represents 102MHz, and the general broadcast information is shown in Table 1.
  • Step S202 Determine current broadcast station coverage information according to the current broadcast coverage area, and determine adjacent broadcast station coverage information according to the adjacent broadcast coverage area.
  • the current broadcast station coverage information is determined according to the current broadcast coverage area
  • the adjacent broadcast station coverage information is determined according to the adjacent broadcast coverage area, because the processes for determining the current broadcast station coverage information and the adjacent broadcast station coverage information are similar , only the specific process of the coverage information of the current broadcasting station is described.
  • the step of determining the coverage information of the current broadcast station according to the current broadcast coverage area includes: determining a center point of the current broadcast coverage area according to the current broadcast coverage area; Select multiple boundary points in sequence on the area boundary of the area; obtain the number of the boundary points, and the relative distance between the center point and each boundary point; determine according to the center point, the number and the relative distance Current broadcast station coverage information.
  • the center point of the coverage area of the current broadcast station can be determined according to the coverage area of the current broadcast station.
  • the specific process is to obtain the longitude and latitude of each boundary point on the area boundary of the current broadcast station coverage area, and calculate The target longitude is calculated, and the target latitude is calculated according to the latitude of each boundary point, and the center point of the current broadcast coverage area is determined according to the target longitude and the target latitude.
  • the coverage area is a circular area as an example, and the boundary points P 0 , P 1 , P 2 , P 3 , P 4 , and P are selected on the area boundary according to the preset interval of 45°.
  • the step of determining the center point of the current broadcast coverage area according to the current broadcast coverage area includes: acquiring the longitude and latitude of each boundary point on the area boundary of the current broadcast station coverage area; Calculate the target longitude according to the longitude of each boundary point, and calculate the target latitude according to the latitude of each boundary point; determine the center point of the current broadcast coverage area according to the target longitude and the target latitude.
  • the target longitude is the average of the longitudes of the border points of each area
  • the target latitude is the average point of the latitudes of the border points of each area
  • the point corresponding to the target longitude and the target latitude in the broadcast coverage area is the center point.
  • Step S203 Encapsulate the current broadcast station overview information and the current broadcast station coverage information to obtain current broadcast station information.
  • Step S204 Encapsulate the overview information of the neighboring broadcasting station and the coverage information of the neighboring broadcasting station to obtain the neighboring broadcasting station information.
  • the encapsulation of broadcast station information is shown in Table 3.
  • the general information of the current broadcast station is determined according to the current broadcast coverage area, and the general information of the adjacent broadcast stations is determined according to the proximity broadcast coverage area; the current broadcast station coverage information is determined according to the current broadcast coverage area, and the current broadcast station coverage information is determined according to the proximity broadcast
  • the coverage area determines the coverage information of the neighboring broadcasting stations; encapsulates the current broadcasting station general information and the current broadcasting station coverage information to obtain the current broadcasting station information; Encapsulation is performed to obtain the information of the adjacent broadcasting stations, and the information of the broadcasting stations can be better transmitted through the encapsulation of the information.
  • FIG. 6 is a schematic flowchart of a third embodiment of a broadcast-based differential data broadcasting method of the present application.
  • the step S30 includes:
  • Step S301 Acquire a longitude range and a latitude range corresponding to the current broadcast coverage area.
  • the longitude range and the latitude range can be determined according to the current broadcast coverage area, the longitude range is used to calculate the longitude difference of the current broadcast coverage area, and the latitude range is used to calculate the latitude difference of the current broadcast coverage area.
  • Step S302 Determine the area long side and the area short side corresponding to the current broadcast coverage area according to the longitude range and the latitude range.
  • the larger value of the distance corresponding to the longitude difference and the distance corresponding to the latitude difference is the long side of the area, and the smaller value is the short side of the area.
  • the long side of the area is D AB
  • the short side of the area is D AC
  • D AB (end latitude-start latitude)*111
  • D AC cos (end longitude)*(end longitude-start longitude)*111
  • 111 refers to the latitude of 1° in the longitude direction. distance (km).
  • Step S303 Divide the long side of the region and the short side of the region in sequence to obtain a plurality of grid intervals.
  • the area length and the area width are sequentially divided according to the preset distance, so as to obtain a plurality of grid intervals
  • the preset distance is the distance between the center points of the two grid intervals
  • the preset distance Corresponding settings can be made according to actual needs.
  • the step of sequentially dividing the long side of the area and the short side of the area to obtain multiple grid intervals includes: dividing the long side of the area according to a preset distance to obtain multiple lengths, etc.
  • the area length and the area width are divided according to the preset distance, respectively, and multiple length equalization points and multiple width equalization points can be obtained.
  • the area length bisectors are L, M, R, etc.
  • the width bisectors are E, F, etc.
  • multiple area bisectors can be determined according to the length bisectors and the width bisectors, Such as EH, FJ and MOQ and so on.
  • a plurality of grid intervals can be obtained by dividing according to the area bisector, such as grid 1, grid 2, grid 3, and so on.
  • N D AB /D m , where N is the number of equal length points, D AB is the area length, and D m is a preset distance.
  • the long side AB of the area is first divided, ABDC is divided into four rectangular areas AKLC, KQML, QURM and UBDR, and then the short side AC of the area is divided, and the short side AC of the divided area is divided into Two steps are described in this embodiment by taking AKLC as an example, 1) first determine the latitude and longitude range of the coverage area of the broadcasting station within the AKLC, remove the EHLC in the area without broadcast signal coverage, 2) then divide the KH to obtain etc.
  • the dividing point J, and then the dividing point F can be determined according to the dividing point J, thereby dividing the AKHE into two grid intervals, AKJF and FJHE.
  • AKJF is grid 1
  • FJHE is grid 2
  • KQPI is grid 3
  • IPNG is grid 4
  • QUSO is grid 5
  • OSWM is grid 6
  • TVDR is grid 7.
  • Step S304 Determine the target mesh division information according to the division result.
  • the divided grid number and the latitude and longitude of the upper right point of the grid interval can be obtained.
  • the upper right points of grid 1 to grid 7 are J, H, P, N, S, W, D in sequence.
  • the grid division information is shown in Table 4.
  • the longitude and The latitude of point 1 is the longitude and latitude of the upper right point J of grid 1 in Fig. 7, the longitude and latitude of the upper right point H of grid 2 of the second point longitude and latitude of grid 2, and so on.
  • grid division information can be determined according to the grid interval division result, as shown in Table 4.
  • step S303 it also includes:
  • Step S3031 Obtain the current grid number corresponding to the grid interval.
  • the number of grids corresponding to the grid interval is obtained.
  • Step S3032 Compare the current grid number with a preset number, and adjust the preset distance according to the comparison result.
  • the number of grids is limited by comparing the number of grids with the preset number.
  • the preset number is the maximum number of grids that the broadcasting station and the user terminal can bear.
  • the preset distance is appropriate. If the number of grids is greater than the preset number, the preset distance needs to be increased, one scale at a time, until the current grid data is less than or equal to the preset number. If the current grid number is equal to the preset number, then the preset distance is appropriate.
  • the longitude range and the latitude range corresponding to the current broadcast coverage area are obtained; the area long side and the area short side corresponding to the current broadcast coverage area are determined according to the longitude range and the latitude range; The side and the short side of the region are divided to obtain a plurality of grid intervals; the target grid division information is determined according to the division result, and the current grid number corresponding to the grid interval is obtained; the current grid number and the grid interval are obtained. The preset number is compared, and the preset distance is adjusted according to the comparison result, so that more grid intervals can be divided to the maximum extent.
  • an embodiment of the present application also proposes a storage medium, where a broadcast-based differential data broadcast program is stored thereon, and when the broadcast-based differential data broadcast program is executed by a processor, the broadcast-based broadcast-based program as described above is implemented. The steps of the differential data broadcast method.
  • FIG. 8 is a structural block diagram of a first embodiment of a broadcast-based differential data broadcasting apparatus of the present application.
  • the broadcast-based differential data broadcasting apparatus proposed in the embodiment of the present application includes:
  • the obtaining module 10 is configured to obtain the current broadcast coverage area and the adjacent broadcast coverage area.
  • the execution body of this embodiment is a broadcast data broadcasting device, and the broadcast data broadcasting device may be a terminal device or other devices, which are not limited in this embodiment.
  • a neighboring broadcasting station is defined as starting from any position of the current broadcasting station, continuously moving in a certain direction, and entering the coverage area of any other broadcasting station for the first time after leaving the coverage area of the current broadcasting station.
  • the broadcasting station is called a neighboring broadcasting station, the current number of broadcasting stations is one, and the number of neighboring broadcasting stations is more than one.
  • X 1 is the current broadcasting station
  • X 2 is one of the neighboring broadcasting stations of X 1
  • Y is the user terminal
  • R 1 is the current broadcasting station corresponding to the current broadcasting station X 1.
  • the broadcast coverage area R 2 is the current broadcast coverage area corresponding to the adjacent broadcast station X 2
  • the location of the user terminal Y corresponds to the location of the user
  • the current broadcast station X 1 is the broadcast station in the area where the user terminal Y is located.
  • this broadcasting station X 1 current broadcast coverage region R 1 the current real-time transmitting a broadcast station X 1 difference data to the user terminal Y, the user terminal Y of its own position is corrected based on the differential data received, if when the user terminal Y to move this X is other than a broadcast station, the user terminal Y receives the broadcast station X currently poor reception quality of the broadcast signal or a broadcast signal can not be received, in order to improve the accuracy of the positioning of the user terminal, the user terminal needs Y Switch the frequency point to the neighboring broadcast station X 2 .
  • the extraction module 20 is configured to determine current broadcast station information according to the current broadcast coverage area, and determine adjacent broadcast station information according to the adjacent broadcast coverage area.
  • the general information of the current broadcast station and the general information of the adjacent broadcast stations can be determined according to the latitude and longitude range of the current broadcast coverage area and the adjacent broadcast coverage area and the mode frequency point information. For the coverage area boundary of the current broadcasting station and the neighboring broadcasting station, select the boundary point according to the angle interval to the center point, and obtain the coverage information of the current broadcasting station and the neighboring broadcasting station, and compare the general information of the current broadcasting station with the current broadcasting station. The coverage information is encapsulated to obtain the current broadcasting station information, and the neighboring broadcasting station general information and the neighboring broadcasting station coverage information are encapsulated to obtain the neighboring broadcasting station information.
  • the dividing module 30 is configured to divide the current broadcast coverage area into a plurality of grid intervals, and determine target grid dividing information according to the dividing result.
  • this embodiment solves this problem by dividing the broadcast coverage area, specifically, dividing the broadcast coverage area into multiple grid intervals. , this embodiment divides the broadcast coverage area into grid intervals according to a preset distance, where the preset distance is the distance between the center points of two grid intervals. After the broadcast coverage area is divided into a plurality of grid intervals, the target grid division information can be obtained according to the division results of each grid interval.
  • the processing module 40 is configured to generate corresponding virtual reference stations in each grid interval respectively, and acquire differential data generated by each virtual reference station.
  • the center position of each grid interval can be determined according to the grid division, a virtual reference station is generated at each center position, and the difference generated by each virtual reference station is obtained. data.
  • the broadcasting module 50 is configured to broadcast the current broadcasting station information, the neighboring broadcasting station information, the target meshing information and the differential data.
  • the current broadcast coverage area and the adjacent broadcast coverage area are obtained; the current broadcast station information is determined according to the current broadcast coverage area, and the adjacent broadcast station information is determined according to the adjacent broadcast coverage area; the current broadcast coverage area is divided into a plurality of grid intervals, Determine the target grid division information according to the division result; generate corresponding virtual reference stations in each grid interval, and obtain the differential data generated by each virtual reference station; divide the current broadcast station information, neighboring broadcast station information, and target grid The information and differential data are broadcasted.
  • the current broadcast station information, neighboring broadcast station information, target grid division information and differential data are broadcast together to improve the positioning accuracy of the broadcast-based differential data broadcast technology.
  • the extracting module 20 is further configured to determine the general information of the current broadcasting station according to the current broadcast coverage area, determine the general information of the adjacent broadcast stations according to the adjacent broadcast coverage area; according to the current broadcast coverage area Determine the coverage information of the current broadcast station, and determine the coverage information of the adjacent broadcast station according to the adjacent broadcast coverage area; encapsulate the general information of the current broadcast station and the coverage information of the current broadcast station to obtain the current broadcast station information; The general information of the broadcasting station and the coverage information of the neighboring broadcasting stations are encapsulated to obtain the neighboring broadcasting station information.
  • the extraction module 20 is further configured to determine the center point of the current broadcast coverage area according to the current broadcast coverage area; and select sequentially on the area boundary of the current broadcast coverage area according to preset intervals. multiple boundary points; obtain the number of the boundary points and the relative distance between the center point and each boundary point; determine the coverage information of the current broadcasting station according to the center point, the number and the relative distance.
  • the extraction module 20 is further configured to obtain the longitude and latitude of each boundary point on the area boundary of the coverage area of the current broadcasting station; calculate the target longitude according to the longitude of each boundary point, and according to each boundary point Calculate the target latitude according to the latitude of the target; determine the center point of the current broadcast coverage area according to the target longitude and the target latitude.
  • the dividing module 30 is further configured to acquire the longitude range and latitude range corresponding to the current broadcast coverage area; determine the area long side corresponding to the current broadcast coverage area according to the longitude range and latitude range and the short side of the area; divide the long side of the area and the short side of the area in sequence to obtain a plurality of mesh intervals; determine the target mesh division information according to the division result.
  • the dividing module 30 is further configured to divide the long side of the area according to a preset distance to obtain a plurality of length equal points; divide the short side of the area according to the preset distance to obtain A plurality of width bisectors; a plurality of area bisectors are determined according to the length bisectors and the width bisectors; and a plurality of grid intervals are determined according to the area bisectors.
  • the broadcast-based differential data broadcasting apparatus further includes an adjustment module for acquiring the current grid number corresponding to the grid interval; comparing the current grid number with a preset number, and The preset distance is adjusted according to the comparison result.
  • the method of the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is better implementation.
  • the technical solutions of the present application can be embodied in the form of software products in essence or the parts that make contributions to the prior art.
  • the computer software products are stored in a storage medium (such as a read-only memory (Read Only Memory). , ROM)/RAM, magnetic disk, optical disk), including several instructions to make a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) execute the methods described in the various embodiments of the present application.

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Abstract

本申请公开了一种基于广播的差分数据播发方法、装置、设备及存储介质，属于通信技术领域。本申请中获取当前广播覆盖区域以及邻近广播覆盖区域；根据当前广播覆盖区域确定当前广播站信息，根据邻近广播覆盖区域确定邻近广播站信息；将当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息；分别在各个网格区间内生成相应的虚拟参考站，并获取各个虚拟参考站生成的差分数据；将当前广播站信息、邻近广播站信息、目标网格划分信息以及差分数据进行广播。

Description

基于广播的差分数据播发方法、装置、设备及存储介质
优先权信息
本申请要求于2020年7月21日申请的、申请号为202010707665.1的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种基于广播的差分数据播发方法、装置、设备及存储介质。
背景技术
基于导航卫星的位置服务在各个领域中被广泛应用，随着用户体验、新兴产业的发展以及规范管理的需求升级，位置服务对定位精度的要求越来越高。
提升卫星导航定位精度的典型方式是建立地基增强系统，即ground-based augmentation systems(GBAS)，通过地基设备提供差分修正信号对卫星导航系统的定位和授时性能进行增强，以达到增加系统可靠性、可用性、定位精度等目的。地基增强系统主要由连续运行参考站系统(Continuously Operating Reference Stations，CORS)、数据播发系统以及用户终端组成。CORS站为地面固定站，根据实时接收到的卫星信号产生差分修正数据，通过数据播发系统传给特定的用户，用户终端根据得到的差分修正数据，修正定位信息。但是当用户终端与CORS站之间的距离增大，用户终端直接利用CORS站播发的差分数据来提高定位精度的效果也将变差。
现有北斗导航地基增强系统中的数据播发系统主要有两种方式：移动通信网络和数字广播技术。基于移动通信网的差分数据播发方法即网络RTK,载波相位差分技术(Real time kinematic，RTK)可根据用户上传的概略位置来生成虚拟参考站技术(Virtual Reference Station，VRS)从而解决用户终端与CORS站间的距离(基线距离)所带来的影响。但是移动通信网络存在用户容量有限、并发性低、使用成本高、信号覆盖范围受限等多种限制条件，难以支持大规模应用。基于广播方式的广播RTK，用户容量无限，但由于缺少回传通道， 目前只能工作于单基站模式，差分数据的增强效果随基线距离增加而变差。
上述内容仅用于辅助理解本申请的技术方案，并不代表承认上述内容是现有技术。
发明内容
本申请的主要目的在于提供一种基于广播的差分数据播发方法、装置、设备及存储介质，旨在解决广播技术因缺少回传通道而无法像网络RTK进行定位，导致广播技术的定位精度较低的技术问题。
为实现上述目的，本申请提供了一种基于广播的差分数据播发方法，所述方法包括以下步骤：
获取当前广播覆盖区域以及邻近广播覆盖区域；
根据所述当前广播覆盖区域确定当前广播站信息，根据所述邻近广播覆盖区域确定邻近广播站信息；
将所述当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息；
分别在各个网格区间内生成相应的虚拟参考站，并获取各个虚拟参考站生成的差分数据；
将所述当前广播站信息、所述邻近广播站信息、所述目标网格划分信息以及所述差分数据进行广播。
在一实施例中，所述根据所述当前广播覆盖区域确定当前广播站信息，根据所述邻近广播覆盖区域确定邻近广播站信息的步骤，包括：
根据所述当前广播覆盖区域确定当前广播站概略信息，根据所述邻近广播覆盖区域确定邻近广播站概略信息；
根据所述当前广播覆盖区域确定当前广播站覆盖信息，根据所述邻近广播覆盖区域确定邻近广播站覆盖信息；
对所述当前广播站概略信息和所述当前广播站覆盖信息进行封装，得到当前广播站信息；
对所述邻近广播站概略信息和所述邻近广播站覆盖信息进行封装，得到邻近广播站信息。
在一实施例中，所述根据所述当前广播覆盖区域确定当前广播站覆盖信息的步骤，包括：
根据所述当前广播覆盖区域确定所述当前广播覆盖区域的中心点；
按照预设间隔在所述当前广播覆盖区域的区域边界上依次选取多个边界点；
获取所述边界点的数量，以及所述中心点与各个边界点之间的相对距离；
根据所述中心点、所述数量以及所述相对距离确定当前广播站覆盖信息。
在一实施例中，所述根据所述当前广播覆盖区域确定所述当前广播覆盖区域的中心点的步骤，包括：
获取所述当前广播站覆盖区域的区域边界上各个边界点的经度和纬度；
根据各个边界点的经度计算目标经度，并根据各个边界点的纬度计算目标纬度；
根据所述目标经度和所述目标纬度确定所述当前广播覆盖区域的中心点。
在一实施例中，所述将所述当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息的步骤，包括：
获取所述当前广播覆盖区域对应的经度范围和纬度范围；
根据所述经度范围和纬度范围确定所述当前广播覆盖区域对应的区域长边和区域短边；
依次对所述区域长边和所述区域短边进行划分，以获得多个网格区间；
根据划分结果确定目标网格划分信息。
在一实施例中，所述依次对所述区域长边和所述区域短边进行划分，以获得多个网格区间的步骤包括：
按照预设距离对所述区域长边进行划分，得到多个长度等分点；
按照预设距离对所述区域短边进行划分，得到多个宽度等分点；
根据所述长度等分点和所述宽度等分点确定多条区域等分线；
根据所述区域等分线确定多个网格区间。
在一实施例中，所述依次对所述区域长边和所述区域短边进行划分，以获得多个网格区间的步骤之后，还包括：
获取所述网格区间对应的当前网格数；
将所述当前网格数与预设数量进行比较，并根据比较结果对所述预设距离进行调整。
此外，为实现上述目的，本申请还提出一种基于广播的差分数据播发装置，所述基于广播的差分数据播发装置包括：
获取模块，用于获取当前广播覆盖区域以及邻近广播覆盖区域；
提取模块，用于根据所述当前广播覆盖区域确定当前广播站信息，根据所述邻近广播覆盖区域确定邻近广播站信息；
划分模块，用于将所述当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息；
生成模块，用于分别在各个网格区间内生成相应的虚拟参考站，并获取各个虚拟参考站生成的差分数据；
广播模块，用于将所述当前广播站信息、所述邻近广播站信息、所述目标网格划分信息以及所述差分数据进行广播。
此外，为实现上述目的，本申请还提出一种基于广播的差分数据播发设备，所述基于广播的差分数据播发设备包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的基于广播的差分数据播发程序，所述基于广播的差分数据播发程序配置为实现如上文所述的基于广播的差分数据播发方法的步骤。
此外，为实现上述目的，本申请还提出一种存储介质，所述存储介质上存储有基于广播的差分数据播发程序，所述基于广播的差分数据播发程序被处理器执行时实现如上文所述的基于广播的差分数据播发方法的步骤。
本申请中获取当前广播覆盖区域以及邻近广播覆盖区域；根据当前广播覆盖区域确定当前广播站信息，根据邻近广播覆盖区域确定邻近广播站信息；将当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息；分别在各个网格区间内生成相应的虚拟参考站，并获取各个虚拟参考站生成的差分数据；将当前广播站信息、邻近广播站信息、目标网格划分信息以及差分数据进行广播，本申请通过将当前广播站信息、邻近广播站信息、目标网格划分信息以及差分数据一起进行广播，提高基于广播的差分数据播 发技术的定位精度。
附图说明
图1是本申请实施例方案涉及的硬件运行环境的基于广播的差分数据播发设备的结构示意图。
图2为本申请基于广播的差分数据播发方法第一实施例的流程示意图。
图3为本申请基于广播的差分数据播发方法第一实施例的定位场景示意图。
图4为本申请基于广播的差分数据播发方法第二实施例的流程示意图。
图5为本申请基于广播的差分数据播发方法第二实施例的边界点选取示意图。
图6为本申请基于广播的差分数据播发方法第三实施例的流程示意图。
图7为本申请基于广播的差分数据播发方法第三实施例的网格划分示意图。
图8为本申请基于广播的差分数据播发装置第一实施例的结构框图。
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
参照图1，图1为本申请实施例方案涉及的硬件运行环境的基于广播的差分数据播发设备结构示意图。
如图1所示，该基于广播的差分数据播发设备可以包括：处理器1001，例如中央处理器(Central Processing Unit，CPU)，通信总线1002、用户接口1003，网络接口1004，存储器1005。其中，通信总线1002用于实现这些组件之间的连接通信。用户接口1003可以包括显示屏(Display)、输入单元比如键盘(Keyboard)，可选用户接口1003还可以包括标准的有线接口、无线接口。网络接口1004可选的可以包括标准的有线接口、无线接口(如无线保真(Wireless-Fidelity，WI-FI)接口)。存储器1005可以是高速的随机存取存 储器(Random Access Memory，RAM)存储器，也可以是稳定的非易失性存储器(Non-Volatile Memory，NVM)，例如磁盘存储器。存储器1005可选的还可以是独立于前述处理器1001的存储装置。
本领域技术人员可以理解，图1中示出的结构并不构成对基于广播的差分数据播发设备的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
如图1所示，作为一种存储介质的存储器1005中可以包括操作系统、网络通信模块、用户接口模块以及基于广播的差分数据播发程序。
在图1所示的基于广播的差分数据播发设备中，网络接口1004主要用于与网络服务器进行数据通信；用户接口1003主要用于与用户进行数据交互；本申请基于广播的差分数据播发设备中的处理器1001、存储器1005可以设置在基于广播的差分数据播发设备中，所述基于广播的差分数据播发设备通过处理器1001调用存储器1005中存储的基于广播的差分数据播发程序，并执行本申请实施例提供的基于广播的差分数据播发方法。
本申请实施例提供了一种基于广播的差分数据播发方法，参照图2，图2为本申请一种基于广播的差分数据播发方法第一实施例的流程示意图。
本实施例中，所述基于广播的差分数据播发方法包括以下步骤：
步骤S10：获取当前广播覆盖区域以及邻近广播覆盖区域。
需要说明的是，本实施例的执行主体为广播数据播发设备，广播数据播发设备可以为终端设备，也可以为其他设备，本实施例不加以限制。
在本实施例中，邻近广播站的定义为从当前广播站的任意位置出发，朝着某个方向连续移动，在离开当前广播站的覆盖区域后任何首次进入的其他广播站覆盖区域，这类广播站被称为邻近广播站，当前广播站的个数为一个，而邻近广播站的个数在一个以上。
在本实施例中，实际定位场景如图3所示，X 1为当前广播站，X 2为X 1的其中一个邻近广播站，Y为用户终端，R 1为当前广播站X 1对应的当前广播覆盖区域，R 2为邻近广播站X 2对应的当前广播覆盖区域，用户终端Y所在位置对应的是用户所在位置，当前广播站X 1为用户终端Y所在区域的广播站，用户终端Y在当前广播站X 1的当前广播覆盖区域R 1内，当前广播站X 1将差 分数据实时发送给用户终端Y，用户终端Y根据接收到的差分数据对自身的定位进行校正。如果当用户终端Y移动至当前广播站X 1之外时，用户终端Y接收到的当前广播站X 1的广播信号的接收质量很差或者无法接收到广播信号，为了提高用户终端定位的准确性，用户终端Y需要将频点切换到邻近广播站X 2。
步骤S20：根据所述当前广播覆盖区域确定当前广播站信息，根据所述邻近广播覆盖区域确定邻近广播站信息。
在本实施例中，根据当前广播覆盖区域和邻近广播覆盖区域的经纬度范围以及模式频点信息可以确定当前广播站概略信息和邻近广播站概略信息。对当前广播站和邻近广播站的覆盖区域边界，根据其到中心点的角度间隔进行边界点选取，可以得到当前广播站覆盖信息和邻近广播站覆盖信息，将当前广播站概略信息与当前广播站覆盖信息进行封装得到当前广播站信息，将邻近广播站概略信息与邻近广播站覆盖信息进行封装得到邻近广播站信息。
步骤S30：将所述当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息。
需要说明的是，为了解决广播技术缺少回传通道只能基于单基站模式的问题，本实施例通过对广播覆盖区域进行划分以解决此问题，具体为将广播覆盖区域划分成多个网格区间，故而按照预设距离对广播覆盖区域进行网格区间的划分，其中，预设距离为两个网格区间中心点之间的距离。本实施例在将广播覆盖区域划分成多个网格区间后，根据各个网格区间的划分结果，可以得到目标网格划分信息。
步骤S40：分别在各个网格区间内生成相应的虚拟参考站，并获取各个虚拟参考站生成的差分数据。
在本实施例中，在划分好各个网格区间之后，根据网格的划分情况可以哦确定各个网格区间的中心位置，在各个中心位置处生成虚拟参考站，并获取各个虚拟参考站生成的差分数据。
步骤S50：将所述当前广播站信息、所述邻近广播站信息、所述目标网格划分信息以及所述差分数据进行广播。
本实施例中获取当前广播覆盖区域以及邻近广播覆盖区域；根据当前广播覆盖区域确定当前广播站信息，根据邻近广播覆盖区域确定邻近广播站信 息；将当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息；分别在各个网格区间内生成相应的虚拟参考站，并获取各个虚拟参考站生成的差分数据；将当前广播站信息、邻近广播站信息、目标网格划分信息以及差分数据进行广播，本实施例通过将当前广播站信息、邻近广播站信息、目标网格划分信息以及差分数据一起进行广播，提高基于广播的差分数据播发技术的定位精度。
参考图4，图4为本申请一种基于广播的差分数据播发方法第二实施例的流程示意图。
基于上述第一实施例，在本实施例中，所述步骤S20包括：
步骤S201：根据所述当前广播覆盖区域确定当前广播站概略信息，根据所述邻近广播覆盖区域确定邻近广播站概略信息。
在本实施例中，广播站概略信息包括广播站的身份标识号、广播站标志(其中，当前广播站标志为1，邻近广播站标识为0)、信号频谱模式以及广播站频点等。在超出当前广播覆盖区域之后，需要切换至邻近广播站进行定位，因此本实施例中是将当前广播站概略信息与邻近广播站概略信息一起进行广播，便于用户终端将频点从当前广播站切换至邻近广播站。信号频谱模式包括0x00->I1、0x01->I2、0x02->I3、0x03->I4、0x10->II1、0x11->II2、0x12->II、0x13->II4等，广播站频点的单位为10^-2MHz，例如频点值10200代表102MHz，广播概略信息如表1所示。
Figure PCTCN2021098395-appb-000001
Figure PCTCN2021098395-appb-000002
表1广播站概略信息
步骤S202：根据所述当前广播覆盖区域确定当前广播站覆盖信息，根据所述邻近广播覆盖区域确定邻近广播站覆盖信息。
在本实施例中，根据所述当前广播覆盖区域确定当前广播站覆盖信息，根据所述邻近广播覆盖区域确定邻近广播站覆盖信息，由于当前广播站覆盖信息和邻近广播站覆盖信息的确定过程类似，仅对当前广播站覆盖信息的具体过程进行说明。具体地，所述根据所述当前广播覆盖区域确定当前广播站覆盖信息的步骤包括：根据所述当前广播覆盖区域确定所述当前广播覆盖区域的中心点；按照预设间隔在所述当前广播覆盖区域的区域边界上依次选取多个边界点；获取所述边界点的数量，以及所述中心点与各个边界点之间的相对距离；根据所述中心点、所述数量以及所述相对距离确定当前广播站覆盖信息。
在具体实施中，根据当前广播站覆盖区域可以确定当前广播站覆盖区域的中心点，具体过程为获取当前广播站覆盖区域的区域边界上各个边界点的经度和纬度，根据各个边界点的经度计算目标经度，并根据各个边界点的纬度计算目标纬度，根据目标经度和目标纬度即确定当前广播覆盖区域的中心点。
在具体实施中，在选取完边界点之后，获取边界点的数量，同时计算中心点与各个边界点之间的相对距离。如图5所示，图5中以覆盖范围为圆形范围为例进行说明，按照预设间隔45°在区域边界上选取边界点P 0、P 1、P 2、P 3、P 4、P 5、P 6以及P 7，其中P 0为与中心点处于相同经度且纬度最大的点，点O为中心点，r 0、r 1、r 2、r 3、r 4、r 5、r 6以及r 7分别为各个边界点与中心点O之间的相对距离，再根据中心点、边界点的数量以及中心点与各个边界点之间的相对距离即可得到当前广播站覆盖信息，广播站覆盖信息如表2所示。
Figure PCTCN2021098395-appb-000003
Figure PCTCN2021098395-appb-000004
表2广播站覆盖信息
进一步地，所述根据所述当前广播覆盖区域确定所述当前广播覆盖区域的中心点的步骤包括：获取所述当前广播站覆盖区域的区域边界上各个边界点的经度和纬度；根据各个边界点的经度计算目标经度，并根据各个边界点的纬度计算目标纬度；根据所述目标经度和所述目标纬度确定所述当前广播覆盖区域的中心点。
需要说明的是，目标经度为各个区域边界点的经度的平均值，目标纬度为各个区域边界点的纬度的平均点，目标经度和目标纬度在广播覆盖区域中对应的点为中心点。
步骤S203：对所述当前广播站概略信息和所述当前广播站覆盖信息进行封装，得到当前广播站信息。
步骤S204：对所述邻近广播站概略信息和所述邻近广播站覆盖信息进行封装，得到邻近广播站信息。
在具体实施中，广播站信息的封装如表3所示。
字段名 类型 备注
引导字 uint8 二进制：11010011
保留字 uint6 二进制：000000
消息长度 uint10 ......
消息编号 uint12  
保留字 uint4 二进制：0000
广播站概略信息 ...... 16byte
广播站覆盖信息 ...... 跟间隔大小有关
CRC校验 uint24 ......
表3广播站信息
本实施例根据所述当前广播覆盖区域确定当前广播站概略信息，根据所述邻近广播覆盖区域确定邻近广播站概略信息；根据所述当前广播覆盖区域 确定当前广播站覆盖信息，根据所述邻近广播覆盖区域确定邻近广播站覆盖信息；对所述当前广播站概略信息和所述当前广播站覆盖信息进行封装，得到当前广播站信息；对所述邻近广播站概略信息和所述邻近广播站覆盖信息进行封装，得到邻近广播站信息，通过信息的封装使得广播站信息能够更好的进行传输。
参考图6，图6为本申请一种基于广播的差分数据播发方法第三实施例的流程示意图。
基于上述第一实施例或第二实施例，提出本申请一种基于广播的差分数据播发方法第三实施例。
以基于第一实施例为例进行说明，在本实施例中，所述步骤S30包括：
步骤S301：获取所述当前广播覆盖区域对应的经度范围和纬度范围。
在本实施例中，根据当前广播覆盖区域可以确定经度范围和纬度范围，经度范围用于计算当前广播覆盖区域的经度差，纬度范围用于计算当前广播覆盖区域的纬度差。
步骤S302：根据所述经度范围和纬度范围确定所述当前广播覆盖区域对应的区域长边和区域短边。
需要说明的是，经度差对应的距离和纬度差对应的距离中较大值为区域长边，较小值为区域短边，如图7所示，区域长边为D AB，区域短边为D AC，D AB＝(终止纬度-起始纬度)*111，D AC＝cos(终止经度)*(终止经度-起始经度)*111，其中，其中，111指经度方向上纬度1°代表的距离(公里)。
步骤S303：依次对所述区域长边和所述区域短边进行划分，以获得多个网格区间。
需要说明的是，本实施例是按照预设距离对区域长度和区域宽度依次进行划分，从而得到多个网格区间，预设距离为两个网格区间之间中心点的距离，预设距离可以根据实际需要进行相应的设置。具体地，所述依次对所述区域长边和所述区域短边进行划分，以获得多个网格区间的步骤包括：按照预设距离对所述区域长边进行划分，得到多个长度等分点；按照预设距离对所述区域短边进行划分，得到多个宽度等分点；根据所述长度等分点和所述宽度等分点确定多条区域等分线；根据所述区域等分线确定多个网格区间。
在具体实施中，分别按照预设距离对区域长度和区域宽度进行划分，可以得到多个长度等分点和多个宽度等分点。如图7所示，其中，区域长度等分点为L、M以及R等，宽度等分点为E和F等，根据长度等分点和宽度等分点可以确定多条区域等分线，例如EH、FJ以及MOQ等。根据区域等分线进行划分即可得到多个网格区间，如网格1、网格2以及网格3等。N＝D AB/D m，其中，N为长度等分点的数量，D AB为区域长度，D m为预设距离。进一步地，在具体划分过程中先对区域长边AB进行划分，将ABDC划分成四个长方形区域AKLC、KQML、QURM以及UBDR，然后再对区域短边AC进行划分，划分区域短边AC分为两个步骤，本实施例中以AKLC为例进行说明，1)先确定广播站覆盖区域在AKLC内的经纬度范围，将没有广播信号覆盖的区域EHLC去除，2)然后对KH进行划分，得到等分点J，进而根据等分点J可以确定等分点F，从而将AKHE划分成AKJF和FJHE两个网格区间。
在得到多个网格区间后，按照从左至右和从下至上的顺序对网格区间进行命名。如图7所示，AKJF为网格1，FJHE为网格2，KQPI为网格3，IPNG为网格4，QUSO为网格5，OSWM为网格6，TVDR为网格7。
步骤S304：根据划分结果确定目标网格划分信息。
在本实施例中，在划分完网格区间后，可以得到划分的网格数和网格区间右上点的经纬度。如图7所示网格1至网格7的右上点依次为J、H、P、N、S、W、D，网格划分信息如表4所示，表4中第1点经度和第1点纬度为图7中网格1的右上点J的经度和纬度，第2点经度和第2点纬度网格2的右上点H的经度和纬度，依此类推。
在本实施例中，在划分完网格区间后，根据网格区间划分结果可以确定网格划分信息，如表4所示。
Figure PCTCN2021098395-appb-000005
Figure PCTCN2021098395-appb-000006
表4网格划分信息
在具体实施中，在得到网格划分信息后，需要对网格划分信息进行封装，从而得到目标网格划分信息，如表5所示。
字段名 类型 备注
引导字 uint8 二进制：11010011
保留字 uint6 二进制：000000
消息长度 uint10 ......
消息编号 uint12  
保留字 uint4 二进制：0000
网格划分信息 ......  
CRC校验 uint24 ......
表5目标网格划分信息
进一步地，在所述步骤S303之后还包括：
步骤S3031：获取所述网格区间对应的当前网格数。
在本实施例中，在网格区间划分完成之后，获取网格区间对应的网格数。
步骤S3032：将所述当前网格数与预设数量进行比较，并根据比较结果对所述预设距离进行调整。
需要说明的是，广播站所划分的网格数越多，代表广播站覆盖区域的网格区间越多，这样使得用户终端接收到的差分数据与用户终端所在的地理位置具有更好的相关性，但是考虑到实际情况中，受到广播站的带宽以及用户终端的计算能力的限制，数量较多的网格区间反而不便于进行定位，因此需要对网格数进行限制。本实施例中通过将网格数与预设数量进行比较实现对网格数的限制，预设数量为广播站和用户终端所能承受的最大网格数，预设距离越大，所划分的网格数就越少，如果当前网格数小于预设数量，在此基础上假如预设距离减小一个尺度，若当前网格数超过预设数量，那么预设距离就是合适的，如果当前网格数大于预设数量，则需要增加预设距离，每次 增加一个尺度，直至当前网格数据小于等于预设数量，如果当前网格数等于预设数量，那么预设距离就是合适的。
本实施例通过获取所述当前广播覆盖区域对应的经度范围和纬度范围；根据所述经度范围和纬度范围确定所述当前广播覆盖区域对应的区域长边和区域短边；依次对所述区域长边和所述区域短边进行划分，以获得多个网格区间；根据划分结果确定目标网格划分信息，并获取所述网格区间对应的当前网格数；将所述当前网格数与预设数量进行比较，并根据比较结果对所述预设距离进行调整，能够在最大限度内划分出更多的网格区间。
此外，本申请实施例还提出一种存储介质，所述存储介质上存储有基于广播的差分数据播发程序，所述基于广播的差分数据播发程序被处理器执行时实现如上文所述的基于广播的差分数据播发方法的步骤。
参照图8，图8为本申请基于广播的差分数据播发装置第一实施例的结构框图。
如图8所示，本申请实施例提出的基于广播的差分数据播发装置包括：
获取模块10，用于获取当前广播覆盖区域以及邻近广播覆盖区域。
需要说明的是，本实施例的执行主体为广播数据播发设备，广播数据播发设备可以为终端设备，也可以为其他设备，本实施例不加以限制。
在本实施例中，邻近广播站的定义为从当前广播站的任意位置出发，朝着某个方向连续移动，在离开当前广播站的覆盖区域后任何首次进入的其他广播站覆盖区域，这类广播站被称为邻近广播站，当前广播站的个数为一个，而邻近广播站的个数在一个以上。
在本实施例中，实际定位场景如图3所示，X 1为当前广播站，X 2为X 1的其中一个邻近广播站，Y为用户终端，R 1为当前广播站X 1对应的当前广播覆盖区域，R 2为邻近广播站X 2对应的当前广播覆盖区域，用户终端Y所在位置对应的是用户所在位置，当前广播站X 1为用户终端Y所在区域的广播站，用户终端Y在当前广播站X 1的当前广播覆盖区域R 1内，当前广播站X 1将差分数据实时发送给用户终端Y，用户终端Y根据接收到的差分数据对自身的定位进行校正，如果当用户终端Y移动至当前广播站X 1之外时，用户终端Y接收到的当前广播站X 1的广播信号的接收质量很差或者无法接收到广播信 号，为了提高用户终端定位的准确性，用户终端Y需要将频点切换到邻近广播站X 2。
提取模块20，用于根据所述当前广播覆盖区域确定当前广播站信息，根据所述邻近广播覆盖区域确定邻近广播站信息。
在本实施例中，根据当前广播覆盖区域和邻近广播覆盖区域的经纬度范围以及模式频点信息可以确定当前广播站概略信息和邻近广播站概略信息。对当前广播站和邻近广播站的覆盖区域边界，根据其到中心点的角度间隔进行边界点选取，可以得到当前广播站覆盖信息和邻近广播站覆盖信息，将当前广播站概略信息与当前广播站覆盖信息进行封装得到当前广播站信息，将邻近广播站概略信息与邻近广播站覆盖信息进行封装得到邻近广播站信息。
划分模块30，用于将所述当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息。
需要说明的是，为了解决广播技术缺少回传通道只能基于单基站模式的问题，本实施例通过对广播覆盖区域进行划分以解决此问题，具体为将广播覆盖区域划分成多个网格区间，本实施例按照预设距离对广播覆盖区域进行网格区间的划分，预设距离为两个网格区间中心点之间的距离。在将广播覆盖区域划分成多个网格区间后，根据各个网格区间的划分结果，可以得到目标网格划分信息。
处理模块40，用于分别在各个网格区间内生成相应的虚拟参考站，并获取各个虚拟参考站生成的差分数据。
在本实施例中，在划分好各个网格区间之后，根据网格的划分情况可以确定各个网格区间的中心位置，在各个中心位置处生成虚拟参考站，并获取各个虚拟参考站生成的差分数据。
广播模块50，用于将所述当前广播站信息、所述邻近广播站信息、所述目标网格划分信息以及所述差分数据进行广播。
本实施例中获取当前广播覆盖区域以及邻近广播覆盖区域；根据当前广播覆盖区域确定当前广播站信息，根据邻近广播覆盖区域确定邻近广播站信息；将当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息；分别在各个网格区间内生成相应的虚拟参考站，并获取各个虚拟参考站生成的差分数据；将当前广播站信息、邻近广播站信息、目标网格划 分信息以及差分数据进行广播，本实施例通过将当前广播站信息、邻近广播站信息、目标网格划分信息以及差分数据一起进行广播，提高基于广播的差分数据播发技术的定位精度。
在一实施例中，所述提取模块20，还用于根据所述当前广播覆盖区域确定当前广播站概略信息，根据所述邻近广播覆盖区域确定邻近广播站概略信息；根据所述当前广播覆盖区域确定当前广播站覆盖信息，根据所述邻近广播覆盖区域确定邻近广播站覆盖信息；对所述当前广播站概略信息和所述当前广播站覆盖信息进行封装，得到当前广播站信息；对所述邻近广播站概略信息和所述邻近广播站覆盖信息进行封装，得到邻近广播站信息。
在一实施例中，所述提取模块20，还用于根据所述当前广播覆盖区域确定所述当前广播覆盖区域的中心点；按照预设间隔在所述当前广播覆盖区域的区域边界上依次选取多个边界点；获取所述边界点的数量，以及所述中心点与各个边界点之间的相对距离；根据所述中心点、所述数量以及所述相对距离确定当前广播站覆盖信息。
在一实施例中，所述提取模块20，还用于获取所述当前广播站覆盖区域的区域边界上各个边界点的经度和纬度；根据各个边界点的经度计算目标经度，并根据各个边界点的纬度计算目标纬度；根据所述目标经度和所述目标纬度确定所述当前广播覆盖区域的中心点。
在一实施例中，所述划分模块30，还用于获取所述当前广播覆盖区域对应的经度范围和纬度范围；根据所述经度范围和纬度范围确定所述当前广播覆盖区域对应的区域长边和区域短边；依次对所述区域长边和所述区域短边进行划分，以获得多个网格区间；根据划分结果确定目标网格划分信息。
在一实施例中，所述划分模块30，还用于按照预设距离对所述区域长边进行划分，得到多个长度等分点；按照预设距离对所述区域短边进行划分，得到多个宽度等分点；根据所述长度等分点和所述宽度等分点确定多条区域等分线；根据所述区域等分线确定多个网格区间。
在一实施例中，所述基于广播的差分数据播发装置还包括调整模块，用于获取所述网格区间对应的当前网格数；将所述当前网格数与预设数量进行比较，并根据比较结果对所述预设距离进行调整。
应当理解的是，以上仅为举例说明，对本申请的技术方案并不构成任何限定，在具体应用中，本领域的技术人员可以根据需要进行设置，本申请对此不做限制。
需要说明的是，以上所描述的工作流程仅仅是示意性的，并不对本申请的保护范围构成限定，在实际应用中，本领域的技术人员可以根据实际的需要选择其中的部分或者全部来实现本实施例方案的目的，此处不做限制。
另外，未在本实施例中详尽描述的技术细节，可参见本申请任意实施例所提供的基于广播的差分数据播发方法，此处不再赘述。
此外，需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者系统不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者系统所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者系统中还存在另外的相同要素。
上述本申请实施例序号仅仅为了描述，不代表实施例的优劣。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如只读存储器(Read Only Memory，ROM)/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本申请各个实施例所述的方法。
以上仅为本申请的优选实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (10)

  1. 一种基于广播的差分数据播发方法，其中，所述基于广播的差分数据播发方法包括：
    获取当前广播覆盖区域以及邻近广播覆盖区域；
    根据所述当前广播覆盖区域确定当前广播站信息，根据所述邻近广播覆盖区域确定邻近广播站信息；
    将所述当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息；
    分别在各个网格区间内生成相应的虚拟参考站，并获取各个虚拟参考站生成的差分数据；
    将所述当前广播站信息、所述邻近广播站信息、所述目标网格划分信息以及所述差分数据进行广播。
  2. 如权利要求1所述的基于广播的差分数据播发方法，其中，所述根据所述当前广播覆盖区域确定当前广播站信息，根据所述邻近广播覆盖区域确定邻近广播站信息的步骤，包括：
    根据所述当前广播覆盖区域确定当前广播站概略信息，根据所述邻近广播覆盖区域确定邻近广播站概略信息；
    根据所述当前广播覆盖区域确定当前广播站覆盖信息，根据所述邻近广播覆盖区域确定邻近广播站覆盖信息；
    对所述当前广播站概略信息和所述当前广播站覆盖信息进行封装，得到当前广播站信息；
    对所述邻近广播站概略信息和所述邻近广播站覆盖信息进行封装，得到邻近广播站信息。
  3. 如权利要求2所述的基于广播的差分数据播发方法，其中，所述根据所述当前广播覆盖区域确定当前广播站覆盖信息的步骤，包括：
    根据所述当前广播覆盖区域确定所述当前广播覆盖区域的中心点；
    按照预设间隔在所述当前广播覆盖区域的区域边界上依次选取多个边界 点；
    获取所述边界点的数量，以及所述中心点与各个边界点之间的相对距离；
    根据所述中心点、所述数量以及所述相对距离确定当前广播站覆盖信息。
  4. 如权利要求3所述的基于广播的差分数据播发方法，其中，所述根据所述当前广播覆盖区域确定所述当前广播覆盖区域的中心点的步骤，包括：
    获取所述当前广播站覆盖区域的区域边界上各个边界点的经度和纬度；
    根据各个边界点的经度计算目标经度，并根据各个边界点的纬度计算目标纬度；
    根据所述目标经度和所述目标纬度确定所述当前广播覆盖区域的中心点。
  5. 如权利要求1至4中任一项所述的基于广播的差分数据播发方法，其中，所述将所述当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息的步骤，包括：
    获取所述当前广播覆盖区域对应的经度范围和纬度范围；
    根据所述经度范围和纬度范围确定所述当前广播覆盖区域对应的区域长边和区域短边；
    依次对所述区域长边和所述区域短边进行划分，以获得多个网格区间；
    根据划分结果确定目标网格划分信息。
  6. 如权利要求5所述的基于广播的差分数据播发方法，其中，所述依次对所述区域长边和所述区域短边进行划分，以获得多个网格区间的步骤包括：
    按照预设距离对所述区域长边进行划分，得到多个长度等分点；
    按照预设距离对所述区域短边进行划分，得到多个宽度等分点；
    根据所述长度等分点和所述宽度等分点确定多条区域等分线；
    根据所述区域等分线确定多个网格区间。
  7. 如权利要求6所述的基于广播的差分数据播发方法，其中，所述依次对所述区域长边和所述区域短边进行划分，以获得多个网格区间的步骤之后， 还包括：
    获取所述网格区间对应的当前网格数；
    将所述当前网格数与预设数量进行比较，并根据比较结果对所述预设距离进行调整。
  8. 一种基于广播的差分数据播发装置，其中，所述基于广播的差分数据播发装置包括：
    获取模块，用于获取当前广播覆盖区域以及邻近广播覆盖区域；
    提取模块，用于根据所述当前广播覆盖区域确定当前广播站信息，根据所述邻近广播覆盖区域确定邻近广播站信息；
    划分模块，用于将所述当前广播覆盖区域划分成多个网格区间，根据划分结果确定目标网格划分信息；
    生成模块，用于分别在各个网格区间内生成相应的虚拟参考站，并获取各个虚拟参考站生成的差分数据；
    广播模块，用于将所述当前广播站信息、所述邻近广播站信息、所述目标网格划分信息以及所述差分数据进行广播。
  9. 一种基于广播的差分数据播发设备，其中，所述基于广播的差分数据播发设备包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的基于广播的差分数据播发程序，所述基于广播的差分数据播发程序配置为实现如权利要求1至7中任一项所述的基于广播的差分数据播发方法的步骤。
  10. 一种存储介质，其中，所述存储介质上存储有基于广播的差分数据播发程序，所述基于广播的差分数据播发程序被处理器执行时实现如权利要求1至7中任一项所述的基于广播的差分数据播发方法的步骤。
PCT/CN2021/098395 2020-07-21 2021-06-04 基于广播的差分数据播发方法、装置、设备及存储介质 WO2022017016A1 (zh)

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