CN101179327A - Control system and method of satellite synchronous receiving card - Google Patents
Control system and method of satellite synchronous receiving card Download PDFInfo
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- CN101179327A CN101179327A CNA2007101792351A CN200710179235A CN101179327A CN 101179327 A CN101179327 A CN 101179327A CN A2007101792351 A CNA2007101792351 A CN A2007101792351A CN 200710179235 A CN200710179235 A CN 200710179235A CN 101179327 A CN101179327 A CN 101179327A
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Abstract
The invention relates to a control system of the satellite synchronization receiving cards. The system includes a central processing unit, a clock processing unit and a receiving card unit which comprises at least two satellite synchronization receiving cards; A logical unit which is used for detecting whether the satellite synchronization receiving cards are under normal running conditions and then according to the configuration strategy to choose one of the normal satellite synchronization receiving cards to establish communication connections with the central processing unit. The logical unit is also used for sending clock signals of the normal satellite synchronization receiving card to the clock processing unit. The invention also relates to a control system and method of the satellite synchronization receiving cards, which can support the automatic selection and switching of many sets of the satellite synchronization systems and increase significantly the reliability of the satellite synchronization system at the base station.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of control system and method for satellite synchronous receiving card.
Background technology
The major function of satellite synchronous receiving card in the wireless network (be called for short star card) is that the control system to satellite synchronous receiving card provides time service, comprise temporal information and pulse per second (PPS) (1Pulse Per Second, 1PPS) signal etc., pps pulse per second signal be as frequency reference, and be synchronous etc. to keep interframe.Base station (BTS) utilizes the timing function of satellite synchro system, adopts phase-locked, the memory technique of intelligence software, and the interference reductions such as signal drift shake that the ionospheric error of relevant satellite, tropospheric error etc. are introduced arrive minimum.The timing signal of satellite synchro system is reliable and stable, has the good long term frequency stability, and BTS uses the crystal clock of high stability, and the short-term stability of this crystal clock combines with the long-term stability of satellite synchro system, has guaranteed that the clock stable of system is reliable.
The operable satellite synchro system of control system of domsat synchronous receiving card has global positioning system (Global Positioning Syetem at present, GPS), GLONASS (Global Navigation Satellite System) (GlobalNavigation Satellite System, GLONASS) and triones navigation system (BDT-1) etc., GPS is a kind of round-the-clock, the satellite navigation system of radio work mode, can make the user accurately determine three-dimensional position in the world, speed and time, the three-dimensional position information that GPS provides is accurate in 10 yards (about 9.1m), the time signal precision that provides is better than 100ns, can be used as reference frequency after treatment and uses; GLONASS is former Soviet Union's development is also continued development by Russia a GPS (Global Position System), and its composition is similar with GPS of USA, but satellite coverage is not as good as gps system; Triones navigation system is round-the-clock, the full-time RNAV system that the satellite navigation locating information is provided of Chinese independent development, has time service, location, communication three big functions.
The control system of existing satellite synchronous receiving card is only installed a cover satellite synchro system at synchronization, as shown in Figure 5, for having the structural representation of a plurality of satellite synchronous receiving card control system now, base station control station is controlled the control system of a plurality of satellite synchronous receiving cards, satellite synchronous receiving card generally places the inside of base station, simultaneously the signal of satellite earth antenna is introduced inside of base station, as shown in Figure 6, structural representation for the control system of existing satellite synchronous receiving card, the control system of this satellite synchronous receiving card receives the pps pulse per second signal of satellite synchronous receiving card by the clock processing unit, carry out serial communication by CPU and satellite synchronous receiving card, but lost efficacy or can't the satellite system corresponding communicate with this star card owing to satellite failure or weather reason cause the satellite synchro system, and do not have standby system in time to switch, thereby cause synchro system time service reliability not high; Simultaneously,, many cover satellite synchro systems be can not connect simultaneously, thereby the automatic selection and the switching of many cover satellite synchro systems caused to support because a cover satellite synchro system is only supported in the base station.
Summary of the invention
The embodiment of the invention provides a kind of control system and method for satellite synchronous receiving card, to improve the reliability of base station satellite synchro system, makes the base station can connect many cover satellite synchronous receiving cards simultaneously, supports the automatic selection and the switching of many cover satellite synchro systems.
The embodiment of the invention provides a kind of control system of satellite synchronous receiving card, specifically comprises CPU, clock processing unit, also comprises:
The receiving card unit comprises at least two satellite synchronous receiving cards;
Logical block, whether the operating state that is used to detect described satellite synchronous receiving card is normal, select normal satellite synchronous receiving card of one of them operating state and CPU to establish a communications link according to collocation strategy, and export the clock signal of the normal satellite synchronous receiving card of this operating state to the clock processing unit.
Said system connects a plurality of satellite synchronous receiving cards simultaneously, can support the automatic selection and the switching of many cover satellite synchro systems, has improved the reliability of base station satellite synchro system greatly.
The embodiment of the invention provides a kind of control system of satellite synchronous receiving card, specifically comprise CPU, clock processing unit, also comprise: at least two satellite synchronous receiving card unit and handover module, wherein, a satellite synchronous receiving card unit comprises:
The receiving card unit comprises at least two satellite synchronous receiving cards;
Logical block, whether the operating state that is used to detect described satellite synchronous receiving card is normal, select normal satellite synchronous receiving card of one of them operating state and CPU to establish a communications link according to collocation strategy, and export the clock signal of the normal satellite synchronous receiving card of this operating state to the clock processing unit.Described handover module is used for when operation irregularity appears in a satellite synchronous receiving card unit, and switch to other satellite synchronous receiving card unit from this satellite synchronous receiving card unit and carry out work,
Said system connects a plurality of satellite synchronous receiving cards simultaneously, can support the automatic selection and the switching of many cover satellite synchro systems, has improved the reliability of base station satellite synchro system greatly.
The embodiment of the invention provides a kind of control method of satellite synchronous receiving card, specifically comprises:
Obtain the operating state of a highest satellite synchronous receiving card of satellite synchronous receiving card priority list medium priority;
Whether the operating state of judging this satellite synchronous receiving card is normal, if normal, then this satellite synchronous receiving card and CPU established a communications link, and exports the clock signal of the normal satellite synchronous receiving card of this operating state to the clock processing unit; As if undesired, then from this satellite synchronous receiving card priority list, obtain the operating state of the highest satellite synchronous receiving card of next priority, judge whether the operating state of this satellite synchronous receiving card is normal; All satellite synchronous receiving cards in having judged described satellite synchronous receiving card priority list or to judge operating state be normal satellite synchronous receiving card, when judging operating state and be normal satellite synchronous receiving card, this satellite synchronous receiving card and CPU are established a communications link, and export the clock signal of the normal satellite synchronous receiving card of this operating state to the clock processing unit, finish this operation when having judged all satellite synchronous receiving cards and not judged operating state when being normal satellite synchronous receiving card.
Said method connects a plurality of satellite synchronous receiving cards simultaneously, adopts the mode of priority list to control the automatic selection and the switchings of overlapping the satellite synchro systems more, has improved the reliability of base station satellite synchro system greatly.
Description of drawings
Fig. 1 is the structural representation of the control system embodiment one of satellite synchronous receiving card of the present invention;
Fig. 2 is the structural representation of the control system embodiment two of satellite synchronous receiving card of the present invention;
Fig. 3 is the structural representation of the control system embodiment three of satellite synchronous receiving card of the present invention;
Fig. 4 is the flow chart of the control method embodiment of satellite synchronous receiving card of the present invention;
Fig. 5 is for having the structural representation of a plurality of satellite synchronous receiving card control system now;
Fig. 6 is the structural representation of the control system of existing satellite synchronous receiving card.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
As shown in Figure 1, execute the structural representation of example one for the control system of satellite synchronous receiving card of the present invention, this system comprises: receiving card unit 11, logical block 12, CPU 13 and clock processing unit 14; Wherein, receiving card unit 11 comprises at least two satellite synchronous receiving cards; Logical block 12, whether the operating state that is used to detect above-mentioned satellite synchronous receiving card is normal, and select normal satellite synchronous receiving card of one of them operating state and CPU 13 to establish a communications link, and to the clock signal of the normal satellite synchronous receiving card of clock processing unit 14 these operating states of output according to collocation strategy.
Above-mentioned collocation strategy can be the priority list collocation strategy, promptly selects the highest satellite synchro system of priority according to priority list; Also can be mandatory policy, promptly select the triones navigation system of China according to the requirement of national security in some zone, above-mentioned clock signal is a pps pulse per second signal.
Wherein, can comprise state detection module 121 and routing control module 122 in the logical block 12, this system receives first by logical block 12, second, the clock signal of the 3rd satellite synchronous receiving card, and by communication serial port switching rs 232 serial interface signal, CPU 13 judges by the state detection module 121 in the logical block 12 whether the operating state of certain satellite synchronous receiving card is normal, if it is normal, then the control interface by logical block is provided with satellite synchronous receiving card routing control module 122, and the rs 232 serial interface signal that the clock signal and the communication serial port of satellite synchronous receiving card working properly are exported outputs to respectively in clock processing unit 14 and the CPU 13, if it is undesired, then select another satellite synchronous receiving card, and whether the operating state that rejudges this satellite synchronous receiving card is normal, till choosing a satellite synchronous receiving card that is in normal operating conditions, if the operating state of all satellite synchronous receiving cards is all undesired, then end operation.
Above-mentioned first; second; the 3rd satellite synchronous receiving card can correspond respectively to and gps system; GLONASS system and triones navigation system; as shown in Figure 1; also can adjust the corresponding order of above-mentioned satellite synchronous receiving card and satellite synchro system as required; for example use triones navigation system in the area and the industry of China's national security sensitivity; guaranteed when a certain satellite synchronous receiving card occurs maybe can't receiving the signal of respective satellite unusually by said system; can select another satellite synchronous receiving card to carry out work; finish relevant work by the satellite system of this satellite synchronous receiving card correspondence, thereby guaranteed the reliability of system synchronization.
Said system connects a plurality of satellite synchronous receiving cards simultaneously, can support the automatic selection and the switching of many cover satellite synchro systems, has improved the reliability of base station satellite synchro system greatly.
The embodiment of the invention also relates to a kind of control system of satellite synchronous receiving card, comprises CPU, clock processing unit, also comprises:
At least two satellite synchronous receiving card unit and handover module, one of them satellite synchronous receiving card unit comprises:
The receiving card unit comprises at least two satellite synchronous receiving cards;
Logical block, whether the operating state that is used to detect described satellite synchronous receiving card is normal, select normal satellite synchronous receiving card of one of them operating state and CPU to establish a communications link according to collocation strategy, and export the clock signal of the normal satellite synchronous receiving card of this operating state to the clock processing unit;
Above-mentioned handover module is used for control when operation irregularity appears in a satellite synchronous receiving card unit, switches to other satellite synchronous receiving card unit from this satellite synchronous receiving card unit and carries out work.
As shown in Figure 2, structural representation for the control system embodiment two of satellite synchronous receiving card of the present invention, this system specifically comprises: primary satellite synchronous receiving card unit 21, backup satellite synchronous receiving card unit 22 and handover module 23, handover module 23 is used for control when operation irregularity appears in primary satellite synchronous receiving card unit 21, switch to backup satellite synchronous receiving card unit 22 and carry out work, wherein, above-mentioned primary, spare satellite synchronous receiving card unit includes:
A satellite synchronous receiving card is used for the tranmitting data register signal;
Satellite synchronous receiving card in the above-mentioned primary satellite synchronous receiving card unit is first satellite synchronous receiving card, satellite synchronous receiving card in the backup satellite synchronous receiving card unit is second satellite synchronous receiving card, above-mentioned first, second satellite synchronous receiving card also can exchange, and above-mentioned first, second satellite synchronous receiving card can link to each other with triones navigation system, GLONASS system or gps system.
In addition, above-mentioned backup satellite synchronous receiving card unit can be for a plurality of, when can switch to another backup satellite synchronous receiving card unit and carrying out work, thereby having guaranteed the reliability of system synchronization when unusual appears in primary satellite synchronous receiving card unit.
Said system realizes connecting satellite synchronous receiving card by active and standby with the satellite synchronous receiving card unit, thereby supports the automatic selection and the switching of many cover satellite synchro systems, has improved the reliability of base station satellite synchro system greatly.
As shown in Figure 3, structural representation for the control system embodiment three of satellite synchronous receiving card of the present invention, this system specifically comprises: primary satellite synchronous receiving card unit 31, backup satellite synchronous receiving card unit 22 and handover module 23, handover module 23 is used for control when operation irregularity appears in primary satellite synchronous receiving card unit, switch to backup satellite synchronous receiving card unit and carry out work, wherein, primary satellite synchronous receiving card unit 31 comprises receiving card unit 11, logical block 12, CPU 13 and clock processing unit 14; Wherein, receiving card unit 11 comprises a plurality of satellite synchronous receiving cards; Logical block 12, whether the operating state that is used to detect above-mentioned satellite synchronous receiving card is normal, select normal satellite synchronous receiving card of one of them operating state and CPU 13 to establish a communications link according to collocation strategy, and export the clock signal of the normal satellite synchronous receiving card of these operating states to clock processing unit 14.
Backup satellite synchronous receiving card unit 22 comprises: a satellite synchronous receiving card is used for the tranmitting data register signal; CPU 13 is used for carrying out serial communication with described satellite synchronous receiving card; Clock processing unit 14 is used for the receive clock signal.
The satellite synchronous receiving card that comprises in the above-mentioned primary satellite synchronous receiving card unit is respectively first, second and the 3rd satellite synchronous receiving card, the used satellite synchronous receiving card in backup satellite synchronous receiving card unit is the 4th satellite synchronous receiving card, above-mentioned four satellite synchronous receiving cards are four different satellite synchronous receiving cards, for example can be triones navigation system, GLONASS system or gps system etc., the above-mentioned order that is provided with also can be changed as required, and the number of the satellite synchronous receiving card of above-mentioned setting also can suitably increase or reduce as required.
Comprise state detection module and routing control module in the above-mentioned logical block, receive first by logical block in this system, second, the clock signal of the 3rd satellite synchronous receiving card, and by communication serial port switching rs 232 serial interface signal, CPU judges by the state detection module in the logical block whether the operating state of certain satellite synchronous receiving card is normal, if it is normal, then the control interface by logical block is provided with satellite synchronous receiving card routing control module, and the clock signal and the communication serial port output signal of satellite synchronous receiving card working properly outputed to respectively in clock processing unit and the CPU, if it is undesired, then select another satellite synchronous receiving card, whether the operating state that rejudges satellite synchronous receiving card is normal, till choosing a satellite synchronous receiving card that is in normal operating conditions, if the operating state of all satellite synchronous receiving card is all undesired, then handover module can automatically switch to this satellite synchronous receiving card backup satellite synchronous receiving card unit and carries out work; If the clock processing unit of primary satellite synchronous receiving card unit or CPU occur when unusual, handover module also can automatically switch to this satellite synchronous receiving card backup satellite synchronous receiving card unit and carry out work.
Said system connects a plurality of satellite synchronous receiving cards simultaneously, can support the automatic selection and the switching of many cover satellite synchro systems, has improved the reliability of base station satellite synchro system greatly.
As shown in Figure 4, be the flow chart of the control method embodiment of satellite synchronous receiving card of the present invention, this method specifically comprises:
From the satellite synchronous receiving card priority list, obtain a highest satellite synchronous receiving card of priority, but when the identical satellite synchronous receiving card of priority occurring, can select one of them at random, also can select according to its order in priority list;
CPU (CPU) judges by the state detection module of logical block whether the operating state of this satellite synchronous receiving card is normal;
Step 103, this satellite synchronous receiving card and CPU are established a communications link, and export the clock signal of the normal satellite synchronous receiving card of this operating state, finish this operation to the clock processing unit;
When the operating state of this satellite synchronous receiving card just often, CPU outputs to clock processing unit and CPU by the routing control module is set respectively with the clock signal of this satellite synchronous receiving card and the signal of communication serial port output;
When this satellite synchronous receiving card is not last satellite synchronous receiving card in the satellite synchronous receiving card priority list, then obtains the operating state of next satellite synchronous receiving card, and turn to above-mentioned steps 102.
If there is the signal of a satellite synchronous receiving card to output to the base station, then EO is operated also end if the state of all satellite synchronous receiving cards is all undesired.
In addition, also comprised before above-mentioned steps 101: the reliability and the importance of each satellite synchronous receiving card that connects according to the base station are provided with the satellite synchronous receiving card priority list according to priority order from high to low.
Said method, connect a plurality of satellite synchronous receiving cards simultaneously, adopt the mode of priority list to control the automatic selection and the switchings of overlapping the satellite synchro systems more, the selection and the switching problem of many covers navigation system have been solved preferably, improved the base station synchronization reliability of signals greatly, simultaneously, also satisfied the special requirement of certain areas and industry.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. the control system of a satellite synchronous receiving card comprises CPU, clock processing unit, it is characterized in that also comprising:
The receiving card unit comprises at least two satellite synchronous receiving cards;
Logical block, whether the operating state that is used to detect described satellite synchronous receiving card is normal, select normal satellite synchronous receiving card of one of them operating state and CPU to establish a communications link according to collocation strategy, and export the clock signal of the normal satellite synchronous receiving card of this operating state to the clock processing unit.
2. the control system of satellite synchronous receiving card according to claim 1 is characterized in that described logical block comprises:
State detection module, whether the operating state that is used to detect described satellite synchronous receiving card is normal;
The routing control module is used for selecting a normal satellite synchronous receiving card of operating state and CPU to establish a communications link according to collocation strategy, and exports the clock signal of the normal satellite synchronous receiving card of this operating state to the clock processing unit.
3. the control system of satellite synchronous receiving card according to claim 1 and 2 is characterized in that described collocation strategy is specially the priority collocation strategy.
4. the control system of a satellite synchronous receiving card comprises CPU, clock processing unit, it is characterized in that also comprising: at least two satellite synchronous receiving card unit and handover module, and wherein, a satellite synchronous receiving card unit comprises:
The receiving card unit comprises at least two satellite synchronous receiving cards;
Logical block, whether the operating state that is used to detect described satellite synchronous receiving card is normal, select normal satellite synchronous receiving card of one of them operating state and CPU to establish a communications link according to collocation strategy, and export the clock signal of the normal satellite synchronous receiving card of this operating state to the clock processing unit;
Described handover module is used for when operation irregularity appears in a satellite synchronous receiving card unit, switches to other satellite synchronous receiving card unit from this satellite synchronous receiving card unit and carries out work.
5. the control system of satellite synchronous receiving card according to claim 4 is characterized in that described logical block comprises:
State detection module, whether the operating state that is used to detect described satellite synchronous receiving card is normal;
The routing control module is used for selecting a normal satellite synchronous receiving card of operating state and CPU to establish a communications link according to collocation strategy, and exports the clock signal of the normal satellite synchronous receiving card of this operating state to the clock processing unit.
6. according to the control system of claim 4 or 5 described satellite synchronous receiving cards, it is characterized in that described collocation strategy is specially the priority collocation strategy.
7. the control method of a satellite synchronous receiving card is characterized in that comprising:
Obtain the operating state of a highest satellite synchronous receiving card of satellite synchronous receiving card priority list medium priority;
Whether the operating state of judging this satellite synchronous receiving card is normal, if normal, then this satellite synchronous receiving card and CPU established a communications link, and exports the clock signal of the normal satellite synchronous receiving card of this operating state to the clock processing unit; As if undesired, then from this satellite synchronous receiving card priority list, obtain the operating state of the highest satellite synchronous receiving card of next priority, judge whether the operating state of this satellite synchronous receiving card is normal; All satellite synchronous receiving cards in having judged described satellite synchronous receiving card priority list or to judge operating state be normal satellite synchronous receiving card, when judging operating state and be normal satellite synchronous receiving card, this satellite synchronous receiving card and CPU are established a communications link, and export the clock signal of the normal satellite synchronous receiving card of this operating state to the clock processing unit, finish this operation when having judged all satellite synchronous receiving cards and not judged operating state when being normal satellite synchronous receiving card.
8. the control method of satellite synchronous receiving card according to claim 7, it is characterized in that the described operating state of obtaining a highest satellite synchronous receiving card of satellite synchronous receiving card priority list medium priority also comprises before:, the satellite synchronous receiving card priority list is set according to priority order from high to low according to the reliability and the importance of satellite synchronous receiving card.
9. according to the control method of claim 7 or 8 described satellite synchronous receiving cards, it is characterized in that describedly judging whether the operating state of this satellite synchronous receiving card normally is specially: judge by inquiry operating state marker bit whether the operating state of this satellite synchronous receiving card is normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101792351A CN101179327A (en) | 2007-12-11 | 2007-12-11 | Control system and method of satellite synchronous receiving card |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101792351A CN101179327A (en) | 2007-12-11 | 2007-12-11 | Control system and method of satellite synchronous receiving card |
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| CN101179327A true CN101179327A (en) | 2008-05-14 |
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| CNA2007101792351A Pending CN101179327A (en) | 2007-12-11 | 2007-12-11 | Control system and method of satellite synchronous receiving card |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101932092A (en) * | 2009-06-23 | 2010-12-29 | 中国移动通信集团公司 | Method and system for implementing macro base station clock synchronization and macro base station equipment |
| CN102540962A (en) * | 2012-01-12 | 2012-07-04 | 孙得膑 | Intelligent multi-time source automatic optimizing and negotiating timing time synchronous system and timing method |
| CN104834226A (en) * | 2015-04-22 | 2015-08-12 | 上海微小卫星工程中心 | Digital satellite simulation system and digital satellite state rapid switching method |
| CN105553538A (en) * | 2015-12-11 | 2016-05-04 | 泛太通信导航有限公司 | Mimo satellite service terminal |
| CN106788686A (en) * | 2017-01-20 | 2017-05-31 | 徐志勇 | Multipoint reception base station is used based on unmanned plane |
| CN106850042A (en) * | 2017-01-18 | 2017-06-13 | 成都科脉通信技术有限公司 | Double star backup fixed base stations |
| CN111766644A (en) * | 2020-06-29 | 2020-10-13 | 北京华云星地通科技有限公司 | Multisource satellite data receiving and processing method based on rest service |
| CN112083639A (en) * | 2020-09-14 | 2020-12-15 | 南方科技大学 | Time synchronization device and time synchronization method |
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- 2007-12-11 CN CNA2007101792351A patent/CN101179327A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101932092B (en) * | 2009-06-23 | 2013-04-24 | 中国移动通信集团公司 | Method and system for implementing macro base station clock synchronization and macro base station equipment |
| CN101932092A (en) * | 2009-06-23 | 2010-12-29 | 中国移动通信集团公司 | Method and system for implementing macro base station clock synchronization and macro base station equipment |
| CN102540962A (en) * | 2012-01-12 | 2012-07-04 | 孙得膑 | Intelligent multi-time source automatic optimizing and negotiating timing time synchronous system and timing method |
| CN102540962B (en) * | 2012-01-12 | 2013-10-02 | 孙得膑 | Intelligent multi-time source automatic optimizing and negotiating timing time synchronous system and timing method |
| CN104834226B (en) * | 2015-04-22 | 2017-06-20 | 上海微小卫星工程中心 | A kind of digital satellite analogue system and digital satellite state fast switch over method |
| CN104834226A (en) * | 2015-04-22 | 2015-08-12 | 上海微小卫星工程中心 | Digital satellite simulation system and digital satellite state rapid switching method |
| CN105553538B (en) * | 2015-12-11 | 2018-10-16 | 泛太通信导航有限公司 | MIMO satellite service terminals |
| CN105553538A (en) * | 2015-12-11 | 2016-05-04 | 泛太通信导航有限公司 | Mimo satellite service terminal |
| US10461815B2 (en) | 2015-12-11 | 2019-10-29 | Pacific Telecom & Navigation Limited | Multi-input and multi-output satellite service terminal |
| CN106850042A (en) * | 2017-01-18 | 2017-06-13 | 成都科脉通信技术有限公司 | Double star backup fixed base stations |
| CN106788686A (en) * | 2017-01-20 | 2017-05-31 | 徐志勇 | Multipoint reception base station is used based on unmanned plane |
| CN106788686B (en) * | 2017-01-20 | 2020-09-25 | 苏州甫腾智能科技有限公司 | Multipoint receiving base station based on unmanned aerial vehicle |
| CN111766644A (en) * | 2020-06-29 | 2020-10-13 | 北京华云星地通科技有限公司 | Multisource satellite data receiving and processing method based on rest service |
| CN112083639A (en) * | 2020-09-14 | 2020-12-15 | 南方科技大学 | Time synchronization device and time synchronization method |
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Application publication date: 20080514 |