CN106533537A - Method for inputting ground station remote control instruction into satellite - Google Patents
Method for inputting ground station remote control instruction into satellite Download PDFInfo
- Publication number
- CN106533537A CN106533537A CN201611001252.1A CN201611001252A CN106533537A CN 106533537 A CN106533537 A CN 106533537A CN 201611001252 A CN201611001252 A CN 201611001252A CN 106533537 A CN106533537 A CN 106533537A
- Authority
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- China
- Prior art keywords
- earth station
- satellite
- telecommand
- transmission frame
- information
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Classifications
-
- 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
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
-
- 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
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18517—Transmission equipment in earth stations
-
- 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
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
-
- 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
- H04B7/204—Multiple access
Abstract
The invention relates to a method for inputting a ground station remote control instruction into a satellite. The method comprises a step of distinguishing ground station remote control instruction input ports, a step of framing an input remote control instruction and obtaining a transmission frame, a step of enabling a plurality of ground stations to simultaneously get access to the same satellite; and a step of coordinating the plurality of ground stations to transmit the transmission frame to the same satellite in sequence, wherein the step of distinguishing the ground station remote command input ports comprises reading transmission source address information, destination address information, source port number information, destination port number information, and transmission priority information by means of the ground station, and then adds the transmission source address information, the destination address information, the source port number information, the destination port number information, and the transmission priority information to a transmission frame header.
Description
Technical field
The present invention relates to a kind of method that earth station's telecommand injects satellite.
Background technology
During conventional satellite telecommand is injected, different satellites take different observing and controlling frequencies.When multiple earth stations
Interference occurring to communicate when simultaneously a satellite injection telecommand is so that instruction injection failure.Therefore ground observing and controlling
The design of net, building-up work will become complex, it is impossible to adapt to flexible use demand.Instruct in more advanced spread spectrum remote control
In method for implanting, due to the intersymbol interference of the asynchronous behavior and spreading code of the transmission of different satellite telemetering datas, can connect simultaneously
Enter and inject earth station's quantity of telecommand less than 10, while accessing and injecting to satellite earth station's quantity of telecommand
It is very limited, and the implementation complexity of receiving device on star can be greatly increased.With gradually opening and various for satellite application
Change, multiple earth stations inject the application scenarios of telecommand simultaneously will be more and more, it is necessary to provide a kind of more economical
Method is realizing multiple earth stations using identical frequency to same satellite injection telecommand.
The content of the invention
In order that in earth station more using identical frequency to same satellite injection telecommand, the invention provides
A kind of method that earth station's telecommand injects satellite, the step of including making a distinction to earth station's telecommand injection port；
The step of framing is carried out to injected telecommand and transmission frame is obtained；The step of multiple earth stations access same satellite simultaneously；
Coordinate multiple earth stations to same satellite chronologically send transmission frame the step of；It is described that earth station's telecommand injection port is entered
The step of row is distinguished, reads transmission source address information, destination address information, source port number information, purpose including by earth station
The operation of port number information and transmission priority information；Then will transmission source address information, destination address information, source port number letter
Breath, destination slogan information and transmission priority information are added to the operation of transmission frame frame header position.
Preferably, it is described the step of framing is carried out to injected telecommand and transmission frame is obtained, including earth station is distant
Control instruction is divided into the operation of multiple packets according to fixed length；Packet framing is added into the operation of transmission frame.
Preferably, it is described to coordinate the step of multiple earth stations chronologically send transmission frame to same satellite to be by each ground
Channel between the station of face based on collision detection retains what access mode was realized, including the behaviour waited to satellite by earth station
Make, operation of the earth station by cable network reception channel frequency state, if the communication frequency between satellite and earth station is idle,
Then earth station sends the operation of transmission frame to satellite；Otherwise, the operation resumed waiting for satellite by earth station；
If earth station sends the operation success of transmission frame to satellite, detect whether to receive the response of satellite；If receive should
Answer, then the up subsequent transmission frame for sending same service；Otherwise, the operation resumed waiting for satellite by earth station.
Preferably, the operation resumed waiting for satellite by the earth station be by earth station additionally wait one it is random between
Realize every the time.
Preferably, the earth station additionally waits a random interval is voluntarily generated random number and matched somebody with somebody by each earth station
Close what some earth station sent broadcasting instructions to complete to other earth stations.
It is, in order to distinguish node address, to make that the present invention adopts the step of making a distinction to earth station's telecommand injection port
Distinguish mutually to realize there is between multiple earth stations and same satellite different communication link in Different Ground station.And to same
The different services of same node point are distinguished at face station using service port number, the satellite data transmission passage of same frequency is weighed
It is multiple to use.
Adopt in this way, same satellite can be accessed remote control by 65536 earth stations simultaneously.When multiple earth stations need
By collision detection, when telecommand is injected to a satellite simultaneously, realize that channel retains so as to complete multiple access between earth station
Access, be remotely controlled instruction note using the satellite remote control transmission channel of Stochastic accessing and time-sharing multiplex same frequency to satellite
Enter.Inexpensive remote control to multiple earth stations is realized by Sharing measure and control frequency.Retain to coordinate by collision detection and channel
Earth station chronologically uploads remote-control data to each satellite.
Description of the drawings
Fig. 1 is that transmitting terminal sends transmission frame step schematic diagram.
Fig. 2 is that receiving terminal receives transmission frame step schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment that the present invention is provided is elaborated.
As Fig. 1 transmitting terminals are sent shown in transmission frame step schematic diagram and Fig. 2 receiving terminals reception transmission frame step schematic diagram,
In satellite remote control task, up injection satellite remote control data are the main tasks of satellite-ground link.The specific embodiment of the present invention
Up injection satellite remote command is realized using following step.By earth station to satellite send data come realize it is up injection defend
Star telecommand.
In order to distinguish the data that multiple earth stations are sent to same satellite, need using different node address to make difference
The different communication link that earth station distinguishes to realize having between multiple earth stations and same satellite mutually.Defend for same
Star, these communication links have identical transmission frequency.Made from earth station by making a distinction to telecommand injection port
The telecommand data of up injection satellite distinguished.In up injection satellite remote command, earth station is used as transmission
Hold and satellite is used as receiving terminal.This process is that earth station's telecommand injection port is made a distinction.Earth station's remote control is referred to
Make injection port make a distinction, transmission source address information, destination address information, source port number letter are read including by each earth station
Breath, destination slogan information and transmission priority information；Then will transmission source address information, destination address information, source port number
Information, destination slogan information and transmission priority information are added to transmission frame frame header position.
Up injection satellite remote command is the process that earth station's telecommand is injected satellite.The telecommand injected
There must be particular content, these particular contents are compressed in transmission frame in, i.e., framing be carried out simultaneously to injected telecommand
Obtain transmission frame.First, satellite remote command is divided into multiple packets, and each packet according to fixed length by earth station
It is encapsulated in a transmission frame in.Each satellite remote command is divided into the packet of multiple fixed length according at least 200 bytes.
The data form of transmission frame is by source address field, destination address field (DAF), source port number field, destination slogan field, priority
Field, satellite remote control packets fields and check code field composition.Wherein, source address information takes 2 bytes, destination address information
Take 2 bytes, source port number information take 1 byte, destination slogan information take 1 byte, precedence information take 1 byte,
Satellite data package informatin takes at least 200 bytes, check code information and takes 4 bytes.Byte shared by each transmission frame is
Above byte sum.
Source address is the Different Ground station identification numbers for sending telecommand.Destination address is that the difference for receiving telecommand is defended
Star identification number.Source port number is that the telecommand of earth station sends COS number, for distinguishing the difference in same earth station
Service.Destination slogan is the telecommand reception processing COS number of satellite, for distinguishing the different services of receiving terminal.Preferentially
Level is determined by the importance of the telecommand frame, and more important telecommand frame, its priority are higher.Priority is used to control
The access order of different user processed, when multiple earth stations are to same satellite transmission transmission frame, for controlling the biography of different services
Defeated frame injects the order of same satellite.
One satellite remote command intercepts satellite remote control data by every at least 200 byte longs from its a data
Bag.Therefore, a satellite remote command can be divided into multiple satellite telemetering data bags.It is divided in a satellite remote command
Afterwards, if a satellite telemetering data bag is less than 200 byte longs, 0 occupy-place of insufficient section.So, longer satellite remote control refers to
Order is divided into the satellite remote control packet of multiple 200 byte longs.
Check code information can be generated using CRC check code, then the CRC check code of generation is added to transmission frame.
Multiple earth stations can access same satellite simultaneously, but multiple earth stations can not be injected simultaneously to same satellite
Telecommand.Accordingly, it would be desirable to coordinating multiple earth stations chronologically uploads satellite remote control data to same satellite.This requires to coordinate
Multiple earth stations chronologically send defeated frame to same satellite.
Multiple access method is retained using the channel of collision detection, multiple earth stations can be realized to the shared frequency of a satellite
Point remote control and chronologically upload satellite remote command data, take into account the simple telecommand short message of transmission burst and orbit parameter note
Enter to instruct continuous data stream.Each earth station is connected with each other by cable network.If an earth station sending out in telecommand
Send state, then the earth station for state being sent in telecommand is broadcasted to the earth station being waited for by cable network
Send the occupied information of channel.The earth station for receiving the occupied information of channel will be again attempted to after selection one fixed response time of wait
Send satellite remote command data flow.Each earth station retains multicast data by the channel that network completes collision detection.Touch
The channel reservation multicast data for hitting detection include that earth station is waited to satellite, and earth station is real by cable network interconnection
Between existing earth station, telecommand sends the information exchange of state, so as to realize the collision detection between multiple earth stations.
Now, earth station is transmitting terminal, and satellite is receiving terminal.Earth station is waited to satellite so that judge whether can be to
Satellite sends telecommand transmission frame.
Earth station sends telecommand transmission frame.Examined by wired network communication channel between earth station at regular intervals
Channel is surveyed whether occupied.If channel frequency is occupied, mean that channel frequency is busy, the channel is unavailable.Now, have
A certain earth station is sending telecommand, and other ground station receptions will not be sent to satellite to channel frequency busy state information
Data.And other earth stations are resumed waiting for.When information is sent to satellite without earth station, i.e., satellite frequency is idle, ground
Face station sends telecommand data and waits satellite to make answer signal.When earth station receives satellite answer signal, earth station's energy
Enough determine that transmission frame sends success and continues to send next transmission frame to all remote controls for completing the same service of the earth station
Note on director data, then the earth station is again introduced into waiting.If earth station does not receive satellite answer signal, the earth station
Assert that transmission frame sends failure.Collision detection is re-started between earth station, determines whether frequency can use.
Satellite reception transmission frame.Satellite can wait earth station's transmission data.Once the number that satellite reception is transmitted to earth station
According to then satellite is returned to corresponding response.
After collision detection is carried out between earth station, when as a result showing that frequency is busy, earth station is by adjusting collision detection etc.
Treat interval time T (n) to carry out collision detection to earth station again.Will be by identical wait interval time T between each earth station
(1) collect seizure condition information.Satellite cannot be such as accessed, then earth station is needed after random interval δ t (n) to channel
Seizure condition is detected to attempt accessing satellite again.
If certain earth station needs to satellite the telecommand being continuously injected into, then this ground in transmission state
Face station will send instruction to adjust the earth station that be waited for initial to the earth station being waited for by network
Wait phase delta t, and wherein earth station up injection continuous data stream when, dispatch other earth stations and avoided.
Channel occupancy information receives the stand-by period for T (n)=T (1)+δ t (n)+Δ t, and wherein n is to be successfully accessed front detection
The number of times of channel occupation status information.If a certain earth station is successfully accessed satellite, its n value reverts to 1.T (1) enters a country for satellite
Afterwards, earth station sends the stand-by period of first time channel occupation status infomation detection before telecommand, and all satellites have identical T
(1).δ t (n) detected after channel occupation status information every time for arbitrary earth station, it is found that frequency is busy or access failure after, ground
Face station automatically generates random number the Random Waiting Time for increasing according to this, and the time is less than T (1) and δ t (1)=0.Δ t gives tacit consent to
For 0, each earth station in channel occupation status is actively waited for other by way of sending broadcasting instructions
Earth station send continue waiting for instruction, the ground that the command request is waited for according to Δ t values wait, send broadcast
The earth station of instruction be successfully accessed satellite and inject instruction after, Δ t is automatically restored to 0.Send out when the ground head of a station time takes frequency
When sending larger data, can actively apply adjusting initial latency phase delta t of other earth stations, broadcasting instructions be sent to other institutes
Have a networking earth station, Shi Ge earth stations Δ t=D, each earth station will under conditions of original initial latency phase invariant same time delay
Attempt afterwards accessing after D durations, then Δ t is automatically restored to 0.
When certain earth station's request arranges Δ t=0, it is adjusted earth station and will records actual channel occupancy duration L, and and D
It is compared, system design margin is P and 0≤P≤1.D is less than if there is (1+P) × L, then the earth station of all networkings can
Refused with receiving when Δ t arranges request in next time.The interference information outside automatic network in future can be so avoided to be mistakenly considered
The information come in automatic network, it is to avoid initial latency phase delta t is maliciously adjusted.
Make to be distinguished between Different Ground station mutually using node address, and same node point is distinguished not by service port number
With servicing, same satellite data transmission passage is enable to be reused.Adopt in this way, same satellite can be while quilt
65536 earth stations access remote control.Connected by cable network between earth station, mutually transmission channel occupancy information realization with
Machine is accessed and time-sharing multiplex is realizing shared satellite data transmission passage to complete the data between earth station and satellite.By altogether
Enjoy observing and controlling frequency and realize inexpensive telecommand data injection of multiple earth stations to same satellite.By believing to channel occupancy
Breath receives the adjustment of stand-by period and realizes accessing each earth station, sends telecommand using identical frequency, to avoid earth station
Between interference.This method greatly reduces cost of implementation and technical risk, with stronger engineer applied and system can
It is realisation.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, under the premise without departing from the principles of the invention, can also make some improvements and modifications, and these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (5)
1. a kind of method that earth station's telecommand injects satellite, it is characterised in that include to earth station's telecommand injection end
The step of mouth makes a distinction；The step of framing is carried out to injected telecommand and transmission frame is obtained；Multiple earth stations connect simultaneously
The step of entering same satellite；Coordinate multiple earth stations to same satellite chronologically send transmission frame the step of；It is described to earth station
The step of telecommand injection port makes a distinction, including by earth station read transmission source address information, destination address information,
The operation of source port number information, destination slogan information and transmission priority information；Then will transmission source address information, destination
Location information, source port number information, destination slogan information and transmission priority information are added to the operation of transmission frame frame header position.
2. the method that earth station's telecommand injects satellite according to claim 1, it is characterised in that described to injected distant
The step of control instruction carries out framing and obtains transmission frame, is divided into multiple data according to fixed length including by earth station's telecommand
The operation of bag；Packet framing is added into the operation of transmission frame.
3. the method that earth station's telecommand injects satellite according to claim 2, it is characterised in that the coordination is multiplely
The step of face station chronologically sends transmission frame to same satellite is protected by the channel between each earth station based on collision detection
Stay what access mode was realized, including the operation waited to satellite by earth station, earth station is believed by cable network reception
The operation of road frequency state, if the communication frequency between satellite and earth station is idle, earth station sends transmission frame to satellite
Operation；Otherwise, the operation resumed waiting for satellite by earth station；
If earth station sends the operation success of transmission frame to satellite, detect whether to receive the response of satellite；If receiving response,
The up subsequent transmission frame for sending same service；Otherwise, the operation resumed waiting for satellite by earth station.
4. the method that earth station's telecommand injects satellite according to claim 3, it is characterised in that the earth station is to defending
The operation resumed waiting for by star is additionally waited a random interval time to realize by earth station.
5. the method that earth station's telecommand injects satellite according to claim 4, it is characterised in that the earth station is extra
Wait random interval be from each earth station voluntarily generate random number and with some earth station other earth stations are sent out
Send broadcasting instructions to complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611001252.1A CN106533537B (en) | 2016-11-14 | 2016-11-14 | Method for injecting remote control instruction of ground station into satellite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611001252.1A CN106533537B (en) | 2016-11-14 | 2016-11-14 | Method for injecting remote control instruction of ground station into satellite |
Publications (2)
| Publication Number | Publication Date |
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| CN106533537A true CN106533537A (en) | 2017-03-22 |
| CN106533537B CN106533537B (en) | 2019-12-13 |
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| CN201611001252.1A Active CN106533537B (en) | 2016-11-14 | 2016-11-14 | Method for injecting remote control instruction of ground station into satellite |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107612612A (en) * | 2017-09-22 | 2018-01-19 | 上海卫星工程研究所 | Satellite TT＆C system |
| CN108696945A (en) * | 2018-05-11 | 2018-10-23 | 西安空间无线电技术研究所 | A kind of accidental access method towards LEO satellite communication systems |
| CN109347537A (en) * | 2018-09-19 | 2019-02-15 | 上海微小卫星工程中心 | The data priority synchronous adjustment and data retrieval method of time-division system Constellation Network |
| CN114285460A (en) * | 2021-12-31 | 2022-04-05 | 浙江时空道宇科技有限公司 | Satellite measurement and control method, device, electronic equipment, storage medium and program product |
| CN115242287A (en) * | 2022-01-04 | 2022-10-25 | 北京电子工程总体研究所 | Ground measurement, operation and control method and system for satellite constellation |
| CN114285460B (en) * | 2021-12-31 | 2024-04-19 | 浙江时空道宇科技有限公司 | Satellite measurement and control method, device, electronic equipment, storage medium and program product |
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| CN115242287A (en) * | 2022-01-04 | 2022-10-25 | 北京电子工程总体研究所 | Ground measurement, operation and control method and system for satellite constellation |
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