CN107147707A - Android platform Big Dipper ephemeris service control method and system - Google Patents
Android platform Big Dipper ephemeris service control method and system Download PDFInfo
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- CN107147707A CN107147707A CN201710283497.6A CN201710283497A CN107147707A CN 107147707 A CN107147707 A CN 107147707A CN 201710283497 A CN201710283497 A CN 201710283497A CN 107147707 A CN107147707 A CN 107147707A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18545—Arrangements for managing station mobility, i.e. for station registration or localisation
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- Computer Networks & Wireless Communication (AREA)
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- Aviation & Aerospace Engineering (AREA)
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Abstract
The present invention proposes a kind of Android platform Big Dipper ephemeris service control method and system, including：The terminal device for being provided with android system monitors whether to open following functions：Whether Big Dipper locating module is opened, whether mobile data or WIFI functions open；If monitoring is opened, next step is performed；Terminal device is set up with ephemeris server and is connected；Terminal device downloads almanac data automatically, and stores to local almanac data storehouse, wherein, the downloading mode of almanac data includes：Download immediately and timing is downloaded；When judgement, which is received, receives predetermined system event or ephemeris Service events, the almanac data downloaded as needed updates almanac data storehouse, and almanac data is read from almanac data storehouse and transmission to Big Dipper locating module is used simultaneously.The present invention, by almanac data locally downloading database in real time, and is handed down to Big Dipper locating module, to shorten cold start-up and track and localization time in good time by mobile data network.
Description
Technical field
The present invention relates to Big Dipper ephemeris service technology field, more particularly to a kind of Android platform Big Dipper ephemeris service control
Method and system processed.
Background technology
BEI-DOU position system is mainly used in mobile unit and military equipment, with flourishing for mobile terminal industry, hand
Machine industry is merged with the continuous of conventional terminal equipment industry, and mobile phone carrying BEI-DOU position system has become numerous sector terminals and set
Standby standard configuration.Current big-dipper satellite limited amount, positions relative difficulty, and strengthening Beidou antenna signal can the positive normal open of interference handset
News.So far, it is not yet present in the related art scheme that Big Dipper ephemeris Service controll is realized in Android phone.
The content of the invention
The purpose of the present invention is intended at least solve one of described technological deficiency.
Therefore, it is an object of the invention to propose a kind of Android platform Big Dipper ephemeris service control method and system, can
, by almanac data locally downloading database in real time, and to be handed down to Big Dipper locating module in good time by mobile data network, with
Shorten cold start-up and track and localization time.
To achieve these goals, embodiments of the invention provide a kind of Android platform Big Dipper ephemeris Service controll side
Method, comprises the following steps：
Step S1, the terminal device for being provided with android system monitors whether to open following functions：Big Dipper locating module is
Whether no unlatching, mobile data or WIFI functions open；If monitoring is opened, step S2 is performed；
Step S2, the terminal device is set up with ephemeris server and is connected；
Step S3, the terminal device is automatic from the ephemeris server to download almanac data, and stores to local
Almanac data storehouse, wherein, the downloading mode of the almanac data includes：Download immediately and timing is downloaded；
Step S4, when judgement, which is received, receives predetermined system event or ephemeris Service events, is downloaded as needed
Almanac data updates the almanac data storehouse, and almanac data is read from the almanac data storehouse and is sent simultaneously to the Big Dipper
Locating module is used.
Further, in the step S1, Big Dipper locating module provides at one of following functions：Big Dipper location-independent,
GPS location-independents, the Big Dipper and GPS integrated positioning patterns.
Further, in the step S3, the downloading mode of the almanac data, including：
(1) download immediately：
When not having data in the almanac data storehouse, the service of first time activation system or service data are eliminated, and are created
Local data base, without almanac data record, it is necessary to download immediately；
When almanac data has failed in database, the difference of present system time and almanac data modification time is checked,
If less than 0 or more than 1 hour, it is believed that ephemeris has failed, modification time system data or for a long time closing Big Dipper positioning work(
It can all cause almanac data failure, it is necessary to download immediately.
(2) timing is downloaded；
After the service of Big Dipper ephemeris starts or after the completion of almanac data download, ephemeris service is calculated down according to system time
The duration of one integral point, starts the service of timing wake-up cell phone system；When integral point is reached, system is waken up and sends timing and downloads
Message, Big Dipper ephemeris service downloads almanac data when receiving timing download message.
Further, in the step S3, binary system almanac data is preserved using blob types, preserved using integer type
Almanac data length, creation time and modification time are preserved using text type.
Further, in the step S4, the predetermined system event includes：
Network connection event：Received when network switching is opened；
System startup completion event：Received after mobile phone power-on；
Date-time event is set：User sets system time to receive.
Further, the ephemeris Service events start work in big dipper module startup, removing almanac data, cold start-up, navigation
Condition is received；Big dipper module switching working mode, Big Dipper location-independent, GPS location-independents, the Big Dipper and GPS integrated positioning patterns are cut
Received when changing.
The present invention also proposes a kind of Android platform Big Dipper ephemeris operation control system, including：Android systems are installed
The terminal device and ephemeris server of system, wherein, the terminal device is built-in with Big Dipper locating module,
The terminal device is used to monitor whether to open following functions：Whether Big Dipper locating module is opened, mobile data or
Whether WIFI functions open, and the terminal device is set up with the ephemeris server and is connected if opening；
The terminal device is automatic from the ephemeris server to download almanac data, and stores to local almanac data
Storehouse, wherein, the downloading mode of the almanac data includes：Download immediately and timing is downloaded；
The terminal device judge receive receive predetermined system event or ephemeris Service events when, as needed under
The almanac data of load updates the almanac data storehouse, and almanac data is read from the almanac data storehouse and is sent simultaneously to described
Big Dipper locating module is used.
Further, the Big Dipper locating module provides at one of following functions：Big Dipper location-independent, GPS location-independents,
The Big Dipper and GPS integrated positioning patterns.
Further, the downloading mode of the almanac data, including：
(1) download immediately：
When not having data in the almanac data storehouse, the service of first time activation system or service data are eliminated, and are created
Local data base, without almanac data record, it is necessary to download immediately；
When almanac data has failed in database, the difference of present system time and almanac data modification time is checked,
If less than 0 or more than 1 hour, it is believed that ephemeris has failed, modification time system data or for a long time closing Big Dipper positioning work(
It can all cause almanac data failure, it is necessary to download immediately.
(2) timing is downloaded；
After the service of Big Dipper ephemeris starts or after the completion of almanac data download, ephemeris service is calculated down according to system time
The duration of one integral point, starts the service of timing wake-up cell phone system；When integral point is reached, system is waken up and sends timing and downloads
Message, Big Dipper ephemeris service downloads almanac data when receiving timing download message.
Further, the almanac data storehouse preserves binary system almanac data using blob types, is preserved using integer type
Almanac data length, creation time and modification time are preserved using text type.
Android platform Big Dipper ephemeris service control method according to embodiments of the present invention and system, it is possible to achieve automatic
Download and update Big Dipper almanac data, whether needed to download according to ephemeris Effective judgement, the data of user are reduced to greatest extent
Flow is consumed.Almanac data is in time read from local data base after big dipper module startup, big dipper module is handed down to and uses,
The locating speed of big dipper module is greatly improved, present satellites lazy weight is compensate for the full extent, locating and tracking is solved
Difficult the problem of, Big Dipper positioning is reached practical purpose on mobile terminals, substantially increase the competitiveness of product, be
Product is won the market to be ensured there is provided strong.The present invention is locally downloading in real time by almanac data by mobile data network
Database, and Big Dipper locating module is handed down in good time, to shorten cold start-up and track and localization time.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the flow chart of the Android platform Big Dipper ephemeris service control method according to the embodiment of the present invention；
Fig. 2 is the structure chart of the Android platform Big Dipper ephemeris operation control system according to the embodiment of the present invention；
Fig. 3 is the schematic diagram of the Big Dipper almanac data library structure according to the embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
As shown in figure 1, the Android platform Big Dipper ephemeris service control method of the embodiment of the present invention, comprises the following steps：
Step S1, the terminal device for being provided with android system monitors whether to open following functions：Big Dipper locating module is
Whether no unlatching, mobile data or WIFI functions open；If monitoring is opened, step S2 is performed.
Specifically, the service of Big Dipper ephemeris operates in system background, automatically all the time as an android system service
Management almanac data is downloaded and almanac data is handed down into Big Dipper locating module in good time.Wherein, the premise bar of almanac data is downloaded
Part is that big dipper module positioning has been started up, and mobile data function is opened or WIFI functions are opened, and terminal device can normally connect
On the ephemeris server that manufacturer's offer is provided.Based on this, it is necessary first to perform step S1 unlatching monitoring function.Wherein, terminal
Equipment can be mobile phone or tablet personal computer etc..
In one embodiment of the invention, Big Dipper locating module provides at one of following functions：Big Dipper location-independent,
GPS location-independents, the Big Dipper and GPS integrated positioning patterns.
Step S2, terminal device is set up with ephemeris server and is connected.
Step S3, terminal device is automatic from ephemeris server to download almanac data, and stores to local almanac data
Storehouse, wherein, the downloading mode of almanac data includes：Download immediately and timing is downloaded.
The almanac data stored in almanac data server corresponds to the following term of validity respectively：
GPS almanac datas every 2 hours update once, and Big Dipper almanac data every 1 hour updates once.Therefore, this hair
The minimum term of validity for clearly determining almanac data is 1 hour.
The structure in almanac data storehouse is illustrated below with reference to Fig. 3：An almanac data storehouse is being locallyd create, is only being preserved
One record, binary system almanac data is preserved using blob types, almanac data length is preserved using integer type, using text
Type preserves creation time and modification time.
In one embodiment of the invention, almanac data downloading mode is divided into two kinds, downloads immediately and timing is downloaded.Under
The almanac data of load is stored in local data base, is used while being handed down to Big Dipper locating module.
Specifically, the downloading mode of almanac data, including：
(1) download immediately：
When there is no data in almanac data storehouse, first time activation system service or service data be eliminated (including recover
Default Value), local data base is created, without almanac data record, it is necessary to download immediately；
When almanac data has failed in database, the difference of present system time and almanac data modification time is checked,
If less than 0 or more than 1 hour, it is believed that ephemeris has failed, modification time system data or for a long time closing Big Dipper positioning work(
It can all cause almanac data failure, it is necessary to download immediately.
(2) timing is downloaded；
After the service of Big Dipper ephemeris starts or after the completion of almanac data download, ephemeris service is calculated down according to system time
The duration of one integral point, starts the service of timing wake-up cell phone system；When integral point is reached, system is waken up and sends timing and downloads
Message, Big Dipper ephemeris service downloads almanac data when receiving timing download message.
Step S4, when judgement, which is received, receives predetermined system event or ephemeris Service events, is downloaded as needed
Almanac data updates almanac data storehouse, and almanac data is read from almanac data storehouse and is sent simultaneously to Big Dipper locating module makes
With.
In one embodiment of the invention, predetermined system event includes：
1) network connection event (" android.net.conn.CONNECTIVITY_CHANGE "), when network switching (is moved
Dynamic data or WIFI) receive when opening；
2) after system startup completion event (" android.intent.action.BOOT_COMPLETED "), mobile phone power-on
Receive；
3) date-time event (" android.intent.action.TIME_SET ") is set, and user sets system time
Receive.
Ephemeris Service events " android.intent.action.ACTION_EPHEMERIS_SERVICE ", in Big Dipper mould
Block, which starts, remove almanac data, cold start-up, navigation the operating mode such as starts and receives；Big dipper module switching working mode, the Big Dipper is independently fixed
Received when position, GPS location-independents, the Big Dipper and GPS integrated positioning pattern switchings.
As shown in Fig. 2 the Android platform Big Dipper ephemeris operation control system of the embodiment of the present invention, including：It is provided with
The terminal device 1 and ephemeris server 2 of android system.Wherein, terminal device 1 is built-in with Big Dipper locating module.
Specifically, terminal device 1 is used to monitor whether to open following functions：Whether Big Dipper locating module is opened, mobile number
According to or WIFI functions whether open, the foundation of terminal device 1 and ephemeris server 2 is connected if opening.
Because the precondition for downloading almanac data is that big dipper module positioning has been started up, and mobile data function is opened
Or WIFI functions are opened, terminal device can be just often connected on the ephemeris server of manufacturer's offer.Based on this, it is necessary first to perform
The Big Dipper is positioned and network opens monitoring function.Wherein, terminal device 1 can be mobile phone or tablet personal computer etc..
In one embodiment of the invention, Big Dipper locating module provides at one of following functions：Big Dipper location-independent,
GPS location-independents, the Big Dipper and GPS integrated positioning patterns.
Terminal device 1 is automatic from ephemeris server 2 to download almanac data, and stores to local almanac data storehouse.
The almanac data stored in ephemeris server 2 corresponds to the following term of validity respectively：
GPS almanac datas every 2 hours update once, and Big Dipper almanac data every 1 hour updates once.Therefore, this hair
The minimum term of validity for clearly determining almanac data is 1 hour.
The structure in almanac data storehouse is illustrated below with reference to Fig. 3：An almanac data storehouse is being locallyd create, is only being preserved
One record, binary system almanac data is preserved using blob types, almanac data length is preserved using integer type, using text
Type preserves creation time and modification time.
In one embodiment of the invention, almanac data downloading mode is divided into two kinds, downloads immediately and timing is downloaded.Under
The almanac data of load is stored in local data base, is used while being handed down to Big Dipper locating module.
Specifically, the downloading mode of almanac data, including：
(1) download immediately：
When there is no data in almanac data storehouse, first time activation system service or service data be eliminated (including recover
Default Value), local data base is created, without almanac data record, it is necessary to download immediately；
When almanac data has failed in database, the difference of present system time and almanac data modification time is checked,
If less than 0 or more than 1 hour, it is believed that ephemeris has failed, modification time system data or for a long time closing Big Dipper positioning work(
It can all cause almanac data failure, it is necessary to download immediately.
(2) timing is downloaded；
After the service of Big Dipper ephemeris starts or after the completion of almanac data download, ephemeris service is calculated down according to system time
The duration of one integral point, starts the service of timing wake-up cell phone system；When integral point is reached, system is waken up and sends timing and downloads
Message, Big Dipper ephemeris service downloads almanac data when receiving timing download message.
Terminal device 1 is downloaded as needed when judgement receives and receives predetermined system event or ephemeris Service events
Almanac data update almanac data storehouse, almanac data is read from almanac data storehouse and is sent simultaneously to Big Dipper locating module makes
With.
In one embodiment of the invention, predetermined system event includes：
1) network connection event (" android.net.conn.CONNECTIVITY_CHANGE "), when network switching (is moved
Dynamic data or WIFI) receive when opening；
2) after system startup completion event (" android.intent.action.BOOT_COMPLETED "), mobile phone power-on
Receive；
3) date-time event (" android.intent.action.TIME_SET ") is set, and user sets system time
Receive.
Ephemeris Service events " android.intent.action.ACTION_EPHEMERIS_SERVICE ", in Big Dipper mould
Block, which starts, remove almanac data, cold start-up, navigation the operating mode such as starts and receives；Big dipper module switching working mode, the Big Dipper is independently fixed
Received when position, GPS location-independents, the Big Dipper and GPS integrated positioning pattern switchings.
Android platform Big Dipper ephemeris service control method according to embodiments of the present invention and system, it is possible to achieve automatic
Download and update Big Dipper almanac data, whether needed to download according to ephemeris Effective judgement, the data of user are reduced to greatest extent
Flow is consumed.Almanac data is in time read from local data base after big dipper module startup, big dipper module is handed down to and uses,
The locating speed of big dipper module is greatly improved, present satellites lazy weight is compensate for the full extent, locating and tracking is solved
Difficult the problem of, Big Dipper positioning is reached practical purpose on mobile terminals, substantially increase the competitiveness of product, be
Product is won the market to be ensured there is provided strong.The present invention is locally downloading in real time by almanac data by mobile data network
Database, and Big Dipper locating module is handed down in good time, to shorten cold start-up and track and localization time.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is not departing from the principle and objective of the present invention
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.The scope of the present invention
By appended claims and its equivalent limit.
Claims (10)
1. a kind of Android platform Big Dipper ephemeris service control method, it is characterised in that comprise the following steps：
Step S1, the terminal device for being provided with android system monitors whether to open following functions：Whether Big Dipper locating module is opened
Open, whether mobile data or WIFI functions open；If monitoring is opened, step S2 is performed；
Step S2, the terminal device is set up with ephemeris server and is connected；
Step S3, the terminal device is automatic from the ephemeris server to download almanac data, and stores to local ephemeris
Database, wherein, the downloading mode of the almanac data includes：Download immediately and timing is downloaded；
Step S4, when judgement, which is received, receives predetermined system event or ephemeris Service events, the ephemeris downloaded as needed
Data update the almanac data storehouse, and almanac data is read from the almanac data storehouse and is sent simultaneously to Big Dipper positioning
Module is used.
2. Android platform Big Dipper ephemeris service control method as claimed in claim 1, it is characterised in that in the step
In S1, Big Dipper locating module provides at one of following functions：Big Dipper location-independent, GPS location-independents, the Big Dipper are combined with GPS
Station-keeping mode.
3. Android platform Big Dipper ephemeris service control method as claimed in claim 1, it is characterised in that in the step
In S3, the downloading mode of the almanac data, including：
(1) download immediately：
When not having data in the almanac data storehouse, the service of first time activation system or service data are eliminated, and create local
Database, without almanac data record, it is necessary to download immediately；
When almanac data has failed in database, the difference of present system time and almanac data modification time is checked, if
Less than 0 or more than 1 hour, it is believed that ephemeris has failed, modification time system data or for a long time closing Big Dipper positioning function are all
Almanac data failure can be caused, it is necessary to download immediately.
(2) timing is downloaded；
After the service of Big Dipper ephemeris starts or after the completion of almanac data download, ephemeris service calculates next according to system time
The duration of integral point, starts the service of timing wake-up cell phone system；When integral point is reached, system, which is waken up and sends timing and download, to disappear
Breath, Big Dipper ephemeris service downloads almanac data when receiving timing download message.
4. Android platform Big Dipper ephemeris service control method as claimed in claim 1, it is characterised in that in the step
In S3, binary system almanac data is preserved using blob types, almanac data length is preserved using integer type, using text type
Preserve creation time and modification time.
5. Android platform Big Dipper almanac data service control method as claimed in claim 1, it is characterised in that described
In step S4, the predetermined system event includes：
Network connection event：Received when network switching is opened；
System startup completion event：Received after mobile phone power-on；
Date-time event is set：User sets system time to receive.
6. Android platform Big Dipper almanac data service control method as claimed in claim 1, it is characterised in that the star
Service events are gone through to start operating mode in big dipper module startup, removing almanac data, cold start-up, navigation and receive；Big dipper module switches work
Operation mode, is received when Big Dipper location-independent, GPS location-independents, the Big Dipper and GPS integrated positioning pattern switchings.
7. a kind of Android platform Big Dipper ephemeris operation control system, it is characterised in that including：Android system is installed
Terminal device and ephemeris server, wherein, the terminal device is built-in with Big Dipper locating module,
The terminal device is used to monitor whether to open following functions：Whether Big Dipper locating module is opened, mobile data or WIFI
Whether function opens, and the terminal device is set up with the ephemeris server and is connected if opening；
The terminal device is automatic from the ephemeris server to download almanac data, and stores to local almanac data storehouse,
Wherein, the downloading mode of the almanac data includes：Download immediately and timing is downloaded；
The terminal device is downloaded as needed when judgement receives and receives predetermined system event or ephemeris Service events
Almanac data updates the almanac data storehouse, and almanac data is read from the almanac data storehouse and is sent simultaneously to the Big Dipper
Locating module is used.
8. Android platform Big Dipper ephemeris operation control system as claimed in claim 7, it is characterised in that the Big Dipper is determined
Position module provides at one of following functions：Big Dipper location-independent, GPS location-independents, the Big Dipper and GPS integrated positioning patterns.
9. Android platform Big Dipper ephemeris operation control system as claimed in claim 7, it is characterised in that the ephemeris number
According to downloading mode, including：
(1) download immediately：
When not having data in the almanac data storehouse, the service of first time activation system or service data are eliminated, and create local
Database, without almanac data record, it is necessary to download immediately；
When almanac data has failed in database, the difference of present system time and almanac data modification time is checked, if
Less than 0 or more than 1 hour, it is believed that ephemeris has failed, modification time system data or for a long time closing Big Dipper positioning function are all
Almanac data failure can be caused, it is necessary to download immediately.
(2) timing is downloaded；
After the service of Big Dipper ephemeris starts or after the completion of almanac data download, ephemeris service calculates next according to system time
The duration of integral point, starts the service of timing wake-up cell phone system；When integral point is reached, system, which is waken up and sends timing and download, to disappear
Breath, Big Dipper ephemeris service downloads almanac data when receiving timing download message.
10. Android platform Big Dipper ephemeris operation control system as claimed in claim 7, it is characterised in that the ephemeris number
Binary system almanac data is preserved using blob types according to storehouse, almanac data length is preserved using integer type, using text type
Preserve creation time and modification time.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111148015A (en) * | 2018-11-06 | 2020-05-12 | 千寻位置网络有限公司 | Positioning method and device, mobile terminal, Android system terminal and Android system application system |
| WO2021004233A1 (en) * | 2019-07-08 | 2021-01-14 | 华为技术有限公司 | Satellite communication method and apparatus, terminal device, satellite, and readable storage medium |
| CN112764067A (en) * | 2020-12-23 | 2021-05-07 | 深圳创维数字技术有限公司 | Method and device for acquiring ephemeris data of GPS (Global positioning System) satellite, and vehicle-mounted and readable storage medium |
| CN115733538A (en) * | 2022-11-11 | 2023-03-03 | 航天行云科技有限公司 | Ephemeris data acquisition and distribution method and system for low-orbit satellite Internet of things terminal |
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| CN111148015B (en) * | 2018-11-06 | 2021-05-04 | 千寻位置网络有限公司 | Positioning method and device, mobile terminal, Android system terminal and Android system application system |
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| US11962396B2 (en) | 2019-07-08 | 2024-04-16 | Huawei Technologies Co., Ltd. | Satellite communication method and apparatus, terminal device, satellite, and readable storage medium |
| CN112764067A (en) * | 2020-12-23 | 2021-05-07 | 深圳创维数字技术有限公司 | Method and device for acquiring ephemeris data of GPS (Global positioning System) satellite, and vehicle-mounted and readable storage medium |
| CN112764067B (en) * | 2020-12-23 | 2023-07-07 | 深圳创维数字技术有限公司 | GPS satellite ephemeris data acquisition method and device, vehicle-mounted and readable storage medium |
| CN115733538A (en) * | 2022-11-11 | 2023-03-03 | 航天行云科技有限公司 | Ephemeris data acquisition and distribution method and system for low-orbit satellite Internet of things terminal |
| CN115733538B (en) * | 2022-11-11 | 2023-11-14 | 航天行云科技有限公司 | Ephemeris data acquisition and distribution method and system of low orbit satellite Internet of things terminal |
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Application publication date: 20170908 |