CN111200458B - Automatic control method and system based on satellite link communication power and modulation mode - Google Patents

Automatic control method and system based on satellite link communication power and modulation mode Download PDF

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CN111200458B
CN111200458B CN202010008225.7A CN202010008225A CN111200458B CN 111200458 B CN111200458 B CN 111200458B CN 202010008225 A CN202010008225 A CN 202010008225A CN 111200458 B CN111200458 B CN 111200458B
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modcod
txpwr
theoretical value
link
value
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CN111200458A (en
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黎小明
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Sichuan Andi Technology Industrial Co Ltd
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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
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

The automatic control method based on the satellite link communication power and the modulation mode comprises the following steps: e for receiving periodic collection feedback of remote stationS/N0Actual value, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel; for received ES/N0Carrying out moving average processing on the actual value; according to E after treatmentS/N0Actual value, query ES/N0-a Modcod entry automatically adjusting Modcod or Txpwr of the link to determine a theoretical value of Modcod or Txpwr; when the link state is excellent, firstly adjusting the ModCod to the maximum value, and if the link state is still excellent, adjusting the Txpwr; when the link state is poor, adjusting Txpwr to the maximum value, and if the link state is still poor, adjusting ModCod; feeding back the ModCod theoretical value or the Txpwr theoretical value to the remote station so that the remote station adjusts the ModCod or Txpwr of the transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value; the invention automatically regulates and controls the link in real time, reduces the transmitting power while maintaining higher modulation code rate, so that the link is in the best state, optimizes the transmission performance and saves the cost.

Description

Automatic control method and system based on satellite link communication power and modulation mode
Technical Field
The invention relates to the technical field of satellite communication, in particular to a control method for automatic optimization of a satellite communication network on a transmission link.
Background
In many scenes, the communication quality of satellite network communication is easily affected by objective factors, for example, link interruption or reduction of transmission performance is easily caused in non-ideal weather conditions such as rainstorm, thunderstorm, cloud cover, ionospheric radiation and the like, or in terrain such as mountains, valleys and the like. Because the influence of rain attenuation and cloud shielding on Ku/KA band communication is large, compared with the Ku band, the KA band signal is more easily influenced by rainfall, and a link is interrupted under a severe condition. Under the ideal condition of the link state, the fixed bandwidth, the fixed coding and the modulation mode are provided, so that the link transmission efficiency can be optimized; however, when the link state is not ideal, the higher modulation scheme/code rate or the lower transmission power is forced to be used, and the situations of link interruption and poor communication quality are likely to occur.
To solve this problem, when the link state is not ideal, the modulation scheme/code rate can be manually reduced to a low order and the transmission power can be increased. However, the manual regulation and control method cannot perform real-time modulation according to the link state, which is not beneficial to operation, and the manpower and material resources consumed by manual setting each time can greatly increase the maintenance cost of satellite link communication.
Disclosure of Invention
In order to solve the above problems, the present invention provides an automatic control method and system based on satellite link communication power and modulation mode, which automatically controls the link in real time, and reduces the transmission power while maintaining a higher modulation code rate, so that the link is in an optimal state, transmission performance is optimized, and cost is saved.
In order to solve the technical problem, the invention adopts the following scheme:
an automatic control method based on satellite link communication power and modulation mode comprises the following steps:
e for receiving periodic collection feedback of remote stationS/N0Actual value, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel;
for received ES/N0Carrying out moving average processing on the actual value;
according to E after treatmentS/N0Actual value, by querying ES/N0-a Modcod entry automatically adjusting Modcod or Txpwr of the link to determine a theoretical value of Modcod or Txpwr;
feeding back the ModCod theoretical value or the Txpwr theoretical value to the remote station so that the remote station adjusts the ModCod or Txpwr of the transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value;
the method for automatically adjusting the ModCod or Txpwr of the link to determine the ModCod theoretical value or Txpwr theoretical value comprises the following steps:
determining E received over a period of timeS/N0Whether the actual values are all higher than E corresponding to ModCod lower limit of link configurationS/N0A threshold;
if yes, the current link state is excellent, and the current E is inquired and judgedS/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod upper limit of the link configuration;
if not, adjusting the ModCod, and taking the adjusted ModCod as a ModCod theoretical value;
if yes, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr lower limit of the link configuration or not;
if yes, finishing the adjustment;
if not, down-regulating Txpwr, and taking the down-regulated Txpwr as a Txpwr theoretical value;
if not, the current link state is poor, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr upper limit or not;
if not, adjusting the Txpwr, and taking the adjusted Txpwr as a Txpwr theoretical value;
if yes, inquiring and judging the current ES/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod lower limit of the link configuration;
if yes, finishing the adjustment;
and if not, down-regulating the ModCod, and taking the down-regulated ModCod as a ModCod theoretical value.
Further, when Txpwr is up-regulated, according to ES/N0Whether the actual value has reached E corresponding to the lower limit of ModCodS/N0And determining the adjustment amplitude by a threshold, adjusting Txpwr in a step-by-step manner if the adjustment amplitude reaches the threshold, and adjusting Txpwr in a step-by-step manner if the adjustment amplitude does not reach the threshold.
Further, the upper limit of Txpwr refers to the rated maximum transmitting power Pm; based on reference transmission power Pr and reference symbol rate Rr, in combination with the maximum modulation code rate configured by the link and the current symbol rate Ra, considering the transmission power fading reserve margin, the calculation formula of the rated maximum transmission power is as follows: pm ═ Pr +10log (Ra/Rr) +. DELTA.Th + margin.
Specifically, the setting range of the rated maximum transmission power:
1. when the ACM is started, the maximum ModCod is changed, and the Delta Th is the difference value between the maximum ModCod threshold and the reference ModCod threshold;
2. when the ACM is closed, the current ModCod is set to be changed, and the Delta Th is the difference value between the current ModCod threshold and the reference ModCod threshold;
3. the Ra symbol rate changes, including bandwidth and roll-off factor.
Further, since the master station TDM carrier is a point-to-multipoint carrier, it is likely that E of multiple remote stations will be receivedS/N0Feedback, in this case, if E of multiple remote station feedback is receivedS/N0Actual value, then with the lowest ES/N0The actual value is processed by a running average to adjust the ModCod or Txpwr of the link.
An automatic control method based on satellite link communication power and modulation mode comprises the following steps:
periodic acquisition ES/N0Actual value and fed back to the master station, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel;
receiving a ModCod theoretical value or a Txpwr theoretical value fed back by the master station, and adjusting the ModCod or Txpwr of a transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value;
the ModCod theoretical value or the Txpwr theoretical value refers to the value of ES/N0The actual value is fed back to the master station, so that the master station receives the ES/N0The actual values are subjected to a running average and the master station is made to pass an inquiry ES/N0The Modcod table entry adjusts the ModCod or Txpwr of the link according to the link state to determine a ModCod theoretical value or Txpwr theoretical value;
the method comprises the following steps that a master station adjusts the ModCod or Txpwr of a link to determine a ModCod theoretical value or Txpwr theoretical value, and specifically comprises the following steps:
causing the primary station to determine E received over a period of timeS/N0Whether the actual values are all higher than E corresponding to ModCod lower limit of link configurationS/N0A threshold, and the following operations are carried out according to the judgment result;
if yes, inquiring if the current link state is excellentAnd judging the current ES/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod upper limit of the link configuration;
if not, adjusting the ModCod, and taking the adjusted ModCod as a ModCod theoretical value;
if yes, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr lower limit of the link configuration or not;
if yes, finishing the adjustment;
if not, down-regulating Txpwr, and taking the down-regulated Txpwr as a Txpwr theoretical value;
if not, the current link state is poor, inquiring and judging the current ES/N0Whether the actual value of Txpwr corresponding to the actual value reaches the upper limit of Txpwr,
if not, adjusting the Txpwr, and taking the adjusted Txpwr as a Txpwr theoretical value;
if yes, inquiring and judging the current ES/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod lower limit of the link configuration;
if yes, finishing the adjustment;
and if not, down-regulating the ModCod, and taking the down-regulated ModCod as a ModCod theoretical value.
Further, when Txpwr is up-regulated, according to ES/N0Whether the actual value has reached E corresponding to the lower limit of ModCodS/N0And determining the adjustment amplitude by a threshold, adjusting Txpwr in a step-by-step manner if the adjustment amplitude reaches the threshold, and adjusting Txpwr in a step-by-step manner if the adjustment amplitude does not reach the threshold.
Further, the upper limit of Txpwr refers to the rated maximum transmitting power Pm; based on reference transmission power Pr and reference symbol rate Rr, in combination with the maximum modulation code rate configured by the link and the current symbol rate Ra, considering the transmission power fading reserve margin, the calculation formula of the rated maximum transmission power is as follows: pm ═ Pr +10log (Ra/Rr) +. DELTA.Th + margin.
An automatic control system based on satellite link communication power and modulation mode comprises a main station and a plurality of remote stations;
remote station for periodic acquisition ES/N0Actual value and feedback toA master station, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel; meanwhile, receiving a ModCod theoretical value or a Txpwr theoretical value fed back by the master station, and adjusting the ModCod or Txpwr of a transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value;
a master station for receiving feedback from the remote stationS/N0Actual value, and for received ES/N0Carrying out moving average processing on the actual value; and is based on processed ES/N0Actual value, by querying ES/N0-a Modcod entry for automatically adjusting the Modcod or Txpwr of the link to determine a theoretical value of Modcod or Txpwr and feeding back the theoretical value of Modcod or Txpwr to the remote station;
the method for automatically adjusting the ModCod or Txpwr of the link to determine the ModCod theoretical value or Txpwr theoretical value comprises the following steps:
determining E received over a period of timeS/N0Whether the actual values are all higher than E corresponding to ModCod lower limit of link configurationS/N0A threshold;
if yes, the current link state is excellent, and the current E is inquired and judgedS/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod upper limit of the link configuration;
if not, adjusting the ModCod, and taking the adjusted ModCod as a ModCod theoretical value;
if yes, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr lower limit of the link configuration or not;
if yes, finishing the adjustment;
if not, down-regulating Txpwr, and taking the down-regulated Txpwr as a Txpwr theoretical value;
if not, the current link state is poor, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr upper limit or not;
if not, adjusting the Txpwr, and taking the adjusted Txpwr as a Txpwr theoretical value;
if yes, inquiring and judging the current ES/N0Actual valueWhether the corresponding actual value of the ModCod reaches the ModCod lower limit of the link configuration or not;
if yes, finishing the adjustment;
and if not, down-regulating the ModCod, and taking the down-regulated ModCod as a ModCod theoretical value.
An automatic control system based on satellite link communication power and modulation mode, comprising:
a data receiving module for receiving the feedback E of the remote stationS/N0An actual value; wherein E isS/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel;
a data processing module for receiving ES/N0Carrying out moving average processing on the actual value;
a link control module for processing the ES/N0Actual value, by querying ES/N0The Modcod table entry regulates and controls ModCod or Txpwr of the link and determines a ModCod theoretical value or Txpwr theoretical value;
the data sending module is used for feeding back the ModCod theoretical value or the Txpwr theoretical value to the remote station so that the remote station can adjust the ModCod or the Txpwr of the transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value;
wherein the link control module is configured to:
determining E received over a period of timeS/N0Whether the actual values are all higher than E corresponding to ModCod lower limit of link configurationS/N0A threshold;
if yes, the current link state is excellent, and the current E is inquired and judgedS/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod upper limit of the link configuration;
if not, adjusting the ModCod, and taking the adjusted ModCod as a ModCod theoretical value;
if yes, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr lower limit of the link configuration or not;
if yes, finishing the adjustment;
if not, down-regulating Txpwr, and taking the down-regulated Txpwr as a Txpwr theoretical value;
if not, the current link state is poor, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr upper limit or not;
if not, adjusting the Txpwr, and taking the adjusted Txpwr as a Txpwr theoretical value;
if yes, inquiring and judging the current ES/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod lower limit of the link configuration;
if yes, finishing the adjustment;
and if not, down-regulating the ModCod, and taking the down-regulated ModCod as a ModCod theoretical value.
An automatic control system based on satellite link communication power and modulation mode, comprising:
a data acquisition module for periodically acquiring ES/N0Actual value, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel;
a data feedback module for collecting ES/N0The actual value is fed back to the master station and the master station is enabled to act according to ES/N0The actual value is processed by a sliding average and E within a period of time is judgedS/N0Whether the actual values are all higher than E corresponding to ModCod lower limit of link configurationS/N0A threshold, and the following operations are carried out according to the judgment result;
if yes, the current link state is excellent, and the current E is inquired and judgedS/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod upper limit of the link configuration;
if not, adjusting the ModCod, and taking the adjusted ModCod as a ModCod theoretical value;
if yes, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr lower limit of the link configuration or not;
if yes, finishing the adjustment;
if not, down-regulating Txpwr, and taking the down-regulated Txpwr as a Txpwr theoretical value;
if not, the current link state is poor, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr upper limit or not;
if not, adjusting the Txpwr, and taking the adjusted Txpwr as a Txpwr theoretical value;
if yes, inquiring and judging the current ES/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod lower limit of the link configuration;
if yes, finishing the adjustment;
if not, down-regulating the ModCod, and taking the down-regulated ModCod as a ModCod theoretical value;
receiving a ModCod theoretical value or a Txpwr theoretical value;
and the link adjusting module is used for receiving the ModCod theoretical value or the Txpwr theoretical value fed back by the main station and adjusting the ModCod or the Txpwr of the transmitting channel.
The invention has the following beneficial effects:
the scheme can be introduced to dynamically ensure the link communication quality, and automatically adjust the transmitting power and the modulation mode/code rate according to the signal-to-noise ratio range of the link feedback receiving signal, such as: under ideal weather conditions, the link modulation mode/code rate can be improved to the maximum, and the power is adjusted to a reasonable threshold value to reduce the power consumption, so that the communication cost is reduced and the transmission efficiency is improved; under non-ideal environment, the modulation mode/code rate can be automatically reduced, the transmitting power can be enhanced, and the communication quality of a link can be ensured.
Compared with the prior Art (ACM), the invention optimizes the link quality assurance performance for the satellite communication link, and can more quickly adjust the ModCod or Txpwr of the link in real time according to the link state by adopting the method of coupling AUPC and ACM, so that the link can reach the optimal working state under the condition of the required minimum power consumption, thereby not only reducing the communication cost of the satellite link, but also ensuring the link quality to be optimal.
Drawings
Fig. 1 is a schematic view of an application scenario of the present invention.
Fig. 2 is a schematic diagram of the adjustment of the transmission power.
Fig. 3 is a schematic diagram of automatic control of the transmission power and the modulation code rate.
FIG. 4 is a flow chart of the steps of the method described in example 1.
FIG. 5 is a flow chart of the steps of the method described in example 2.
FIG. 6 is a flow chart of the steps of the method described in example 3.
FIG. 7 is a flowchart of the steps of the method of embodiment 4.
Fig. 8 is a block diagram of the system described in embodiment 6.
Fig. 9 is a block configuration diagram of the system described in embodiment 7.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Description of the principle:
ACM (adaptive coded modulation) brief description: the ACM dynamically adjusts the sending modulation mode/code rate of the local terminal based on the received signal strength of the remote station or the beacon of the local terminal, thereby ensuring that the signal quality of the opposite terminal is maintained at a reasonable level and solving the influence of rain attenuation on the satellite link transmission. For short: and (5) automatic modulation code rate adjustment.
AUPC (automatic uplink power control technology) brief description: the AUPC dynamically adjusts the sending power of the local terminal based on the received signal strength of the remote station or the beacon machine of the local terminal, thereby ensuring that the signal quality of the opposite terminal is maintained at a reasonable level and solving the influence of rain attenuation on satellite link transmission. For short: and (4) automatic power adjustment.
Brief description of ACM coupling to AUPC: communication quality is guaranteed based on weather conditions, ModCod is guaranteed to be kept the largest preferentially, bandwidth is reasonably and effectively utilized, the communication quality is guaranteed to be optimal, and in the process that rain attenuation gradually increases, link ModCod is guaranteed preferentially by increasing the transmitting equipment Txpwr. And when the Txpwr reaches the maximum and the rain attenuation is still continuously increased, the communication quality of the link is ensured by reducing the ModCod.
4. Description of the overall scheme of the invention: according to E of feedbackS/N0The actual value is used for judging whether the E corresponding to the ModCod lower limit of the link configuration is reachedS/N0If the threshold is reached, the power is rapidly amplified; monitoring remote station acquisition in real timeS/N0The actual value changes if ES/N0The actual value is gradually increased, and the ModCod can be adjusted up if the link state is continuously improved; if E isS/N0The actual value corresponds to E at the target ModCodS/N0If the fluctuation is within a certain range of the threshold, the adjustment is not carried out; link E when ModCod adjusts to ModCod upper bound of link configurationS/N0The actual value is still higher than the E corresponding to the current ModCod upper limitS/N0If the threshold is exceeded and the link status is still good, the transmit power is decreased until the transmit power reaches the lowest value for normal operation of the device (the lowest transmit power is different for each type of communication device).
5. Scene description: the remote station feeds back E through the satellite according to the link stateS/N0Giving a master station; the master station receives E corresponding to each remote stationS/N0Then, by the calculation method of the moving average, for ES/N0And processing the data and submitting the result to a link control module. Link control module query ES/N0And calculating the corresponding ModCod/Txpwr according to the value and the corresponding modecode table entry, and feeding back the latest value to the remote station in time. After receiving the latest ModCod/Txpwr value, the remote station immediately adjusts the transmission channel parameters, thus forming a closed loop for signal quality acquisition and feedback, and ensuring the link communication quality. Calculation of ModCod/Txpwr is dependent on the calculation by ES/N0ModCod entry, query ES/N0A value and a corresponding modecode entry that is a representation of the transmission performance of the satellite device.
Example 1
The present embodiment provides an automatic control method based on communication power and modulation mode of a satellite link, as shown in fig. 4, including the following steps:
e for receiving periodic collection feedback of remote stationS/N0Actual value, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel;
for received ES/N0Carrying out moving average processing on the actual value;
according to E after treatmentS/N0Actual value, by querying ES/N0-a Modcod entry automatically adjusting Modcod or Txpwr of the link to determine a theoretical value of Modcod or Txpwr;
and feeding back the ModCod theoretical value or the Txpwr theoretical value to the remote station so that the remote station adjusts the ModCod or Txpwr of the transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value.
After the master station determines the ModCod theoretical value or the Txpwr theoretical value and sends the ModCod theoretical value or the Txpwr theoretical value to the remote station, the remote station adjusts the ModCod parameter or the Txpwr parameter of a transmission channel according to the ModCod theoretical value or the Txpwr theoretical value, and the E fed back by the remote station is enabled to beS/N0The actual value changes, and the master station receives the latest E of the remote stationS/N0After the actual value, the data processing and theoretical value determination are performed again to form a closed loop, and finally the transmission channel parameters of the remote station are adjusted to the optimal state.
Specifically, the automatic adjustment of ModCod or Txpwr of the link to determine the ModCod theoretical value or Txpwr theoretical value, as shown in fig. 3, includes:
determining E received over a period of timeS/N0Whether the actual values are all higher than E corresponding to ModCod lower limit of link configurationS/N0A threshold; (the time period of judgment can be specifically determined according to the actual conditions of the equipment)
If yes, the current link state is excellent, and the current E is inquired and judgedS/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod upper limit of the link configuration;
if not, adjusting the ModCod, and taking the adjusted ModCod as a ModCod theoretical value;
if yes, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr lower limit of the link configuration or not;
if yes, finishing the adjustment;
if not, down-regulating Txpwr, and taking the down-regulated Txpwr as a Txpwr theoretical value;
if not, the current chainIf the road state is poor, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr upper limit or not;
if not, adjusting the Txpwr, and taking the adjusted Txpwr as a Txpwr theoretical value;
if yes, inquiring and judging the current ES/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod lower limit of the link configuration;
if yes, finishing the adjustment;
and if not, down-regulating the ModCod, and taking the down-regulated ModCod as a ModCod theoretical value.
Further, when Txpwr is up-regulated, according to ES/N0Whether the actual value has reached E corresponding to the lower limit of ModCodS/N0And determining the adjustment amplitude by a threshold, quickly adjusting the Txpwr if the adjustment amplitude reaches the threshold, and gradually adjusting the Txpwr if the adjustment amplitude does not reach the threshold.
Specifically, the Txpwr upper limit refers to the rated maximum transmission power Pm; as shown in fig. 2, based on the reference transmission power Pr and the reference symbol rate Rr, in combination with the maximum modulation code rate configured for the link and the current symbol rate Ra, considering the transmission power fading margin, the calculation formula of the rated maximum transmission power is: pm ═ Pr +10log (Ra/Rr) +. DELTA.Th + margin.
Specifically, the setting range of the rated maximum transmission power:
1. when the ACM is started, the maximum ModCod is changed, and the Delta Th is the difference value between the maximum ModCod threshold and the reference ModCod threshold;
2. when the ACM is closed, the current ModCod is set to be changed, and the Delta Th is the difference value between the current ModCod threshold and the reference ModCod threshold;
3. the Ra symbol rate changes, including bandwidth and roll-off factor.
Further, since the master station TDM carrier is a point-to-multipoint carrier, it is likely that E of multiple remote stations will be receivedS/N0Feedback, in this case, if E of multiple remote station feedback is receivedS/N0Actual value, then with the lowest ES/N0The actual value is processed by moving average to adjust ModCod orTxpwr。
Example 2
The present embodiment provides an automatic control method based on communication power and modulation mode of a satellite link, as shown in fig. 5, including the following steps:
periodic acquisition ES/N0Actual value and fed back to the master station, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel;
receiving a ModCod theoretical value or a Txpwr theoretical value fed back by the master station, and adjusting the ModCod or Txpwr of a transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value;
the ModCod theoretical value or the Txpwr theoretical value refers to the value of ES/N0The actual value is fed back to the master station, so that the master station receives the ES/N0The actual values are subjected to a running average and the master station is made to pass an inquiry ES/N0The Modcod table entry adjusts the ModCod or Txpwr of the link according to the link state to determine the ModCod theoretical value or Txpwr theoretical value.
After receiving the ModCod theoretical value or Txpwr theoretical value determined by the master station, the remote station adjusts the ModCod or Txpwr parameter of the transmitting channel accordingly, so as to feed back E to the master stationS/N0The actual value also changes so that the master station receives the latest ES/N0After the actual value, the data processing is carried out again and the theoretical value is determined, the remote station adjusts the transmission channel parameter again according to the received ModCod theoretical value or Txpwr theoretical value, so as to form a closed loop, and the transmission channel parameter of the remote station is finally adjusted to the optimal state.
According to the control principle shown in fig. 3, the master station automatically adjusts the ModCod or Txpwr of the link to determine the ModCod theoretical value or Txpwr theoretical value, and the adjustment and control process is the same as that in embodiment 1 and is not described again.
Example 3
This embodiment provides an automatic control method based on the communication power and modulation mode of the satellite link when the link status is bad, and provides a method for controlling the communication power and modulation mode of the satellite link when the link status is bad, ES/N0The actual value has reached the link configurationSet ModCod lower limit corresponding ES/N0And a threshold, wherein the transmitting power should be rapidly amplified in order to ensure the communication quality of the link.
Description of the overall process: poor link status, ES/N0And under the condition of poor actual value, the current actual transmission modulation code rate is assumed to be larger than the lowest modulation code rate. The receiving end judges the receiving ES/N0When the modulation code rate is lower than the corresponding threshold of the lowest modulation code rate, the transmitting power is preferentially amplified to ensure that a link is smooth, the power amplification process is shown in fig. 2, and the actual regulation and control process can refer to fig. 3; when the transmission power reaches the maximum value of the device, ES/N0The actual value is still lower than the current modulation code rate corresponding to ES/N0And (3) threshold, starting to reduce the modulation code rate until the modulation code rate is reduced to the lowest modulation code rate of the link configuration, referring to fig. 1 and fig. 3. The speed of amplitude adjustment is based on ES/N0Whether the actual value reaches E corresponding to the lowest modulation mode/modulation code rate of ACM configurationS/N0And if the threshold is reached, the threshold must be adjusted quickly, and if the threshold is not reached, the threshold can be adjusted gradually.
Purpose of automatic adjustment of transmission power:
a) the influence of external factors such as rain attenuation, cloud cover shielding and ionosphere radiation on the signal quality is resisted, so that the remote station can receive the high enough ES/N0To increase satellite link transmission reliability;
b) let E receivedS/N0The value is not too high, thereby preventing the power of the repeater from being wasted and reducing the power consumption of equipment at the transmitting side;
c) the link can work in a higher modulation mode/code rate as much as possible by combining the automatic code rate modulation function, and the effective utilization efficiency of the frequency spectrum is improved.
In particular, if E is received within a period of timeS/N0The actual value reaches or is lower than E corresponding to ModCod lower limit of link configuration in whole or partS/N0Threshold, the current link status is bad. As shown in fig. 6, the automatic control method based on the communication power and modulation mode of the satellite link provided in this embodiment is as follows:
s1, farE for periodically acquiring feedback by end stationS/N0Actual value and fed back to the master station, wherein ES/N0The actual value varies dynamically according to the ModCod and Txpwr of the current remote station transmit channel.
S2, E received by the master station pairS/N0The actual values are subjected to a running average process.
S3, according to the processed ES/N0Actual value, by querying ES/N0Modcod table entry, which automatically adjusts Modcod or Txpwr of the link in real time.
Adjusting the ModCod or Txpwr of a link includes the steps of:
s300, query ES/N0ModCod entry and determine current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr upper limit or not;
s301, when the judgment result of S300 is negative, up-regulating a first-stage Txpwr, and feeding back the up-regulated Txpwr as a Txpwr theoretical value to a remote station;
s401, the remote station adjusts the Txpwr of the transmitting channel according to the received Txpwr theoretical value;
looping steps S1, S2, S3, S300, S301 and S401, when the actual value of Txpwr reaches the upper limit of Txpwr, i.e. S301 does not hold, terminating steps S301 and S401, and beginning to execute the following steps:
s302, when the judgment result of S300 is yes, inquiring and judging the current ES/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod lower limit of the link configuration;
s3021, if yes, ending the adjustment;
s3022, if not, down-regulating the primary ModCod, and feeding back the down-regulated ModCod serving as a ModCod theoretical value to the remote station;
s402, the remote station adjusts the ModCod of the transmitting channel according to the received ModCod theoretical value;
looping through steps S1, S2, S3, S300, S302, S3022, and S402, if the ModCod actual value reaches the ModCod lower limit of the link configuration, step S3022 is not established, and step S3021 is executed, i.e., the adjustment is ended.
Example 4
This embodiment provides an automatic control method based on the communication power and modulation mode of the satellite link when the link state is good, and provides an automatic control method based on the communication power and modulation mode of the satellite link when the link state is good, ES/N0E corresponding to the actual value higher than ModCod lower limit of link configurationS/N0And the threshold is used for increasing the modulation code rate of the link so as to improve the communication speed of the link.
Overall scheme description:
ES/N0assuming received E is better under continuous and better link statusS/N0The actual value reaches the maximum modulation code rate corresponding to ES/N0The threshold, and the actual modulation code rate is smaller than the maximum value of the link configuration. As shown in fig. 1, when the master station receives the feedback from the remote station ES/N0After the actual value, judge ES/N0If the actual value is in the up-regulation range of the current modulation code rate, the first-level modulation code rate is increased, at this time, the power does not change, and the modulation code rate up-regulation process can refer to fig. 3. The circulation is carried out until the modulation code rate is adjusted to the configured maximum modulation mode/code rate, and then the current E is judgedS/N0The actual value is still higher than the current increased modulation code rate corresponding to ES/N0And (4) threshold. Then, in conjunction with fig. 2, the transmission power is reduced to save energy, and the transmission power reduction process can refer to fig. 3 until the transmission power is reduced to the lowest transmission power (the lowest transmission power of each type of communication device is different) required for normal communication of the link.
In particular, if E is received within a period of timeS/N0E corresponding to the ModCod lower limit of the link configuration with the actual value higher thanS/N0And if the threshold is exceeded, the current link state is excellent. As shown in fig. 7, the automatic control method based on the communication power and modulation mode of the satellite link provided in this embodiment is as follows:
s1, E, periodically collecting feedback by remote stationS/N0Value and fed back to the master station, wherein ES/N0The actual value varies dynamically according to the ModCod and Txpwr of the current remote station transmit channel.
S2 Master station pairReceived ES/N0The actual values are subjected to a running average process.
S5, according to the processed ES/N0Actual value, by querying ES/N0Modcod table entry, which automatically adjusts Modcod or Txpwr of the link in real time.
Adjusting the ModCod or Txpwr of a link includes the steps of:
s500, query ES/N0ModCod entry and determine current ES/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod upper limit of the link configuration;
s501, when the judgment result of the S500 is negative, a primary ModCod is adjusted upwards, and the adjusted ModCod is used as a ModCod theoretical value to be fed back to a remote station;
s601, the remote station adjusts the ModCod of the transmitting channel according to the received ModCod theoretical value;
looping through steps S1, S2, S5, S500, S501, and S601, when the actual value of ModCod reaches the ModCod upper limit of the link configuration, i.e., S301 does not hold, terminating steps S501 and S601, and beginning to perform the following steps:
s502, when the judgment result of S500 is yes, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr lower limit of the link configuration or not;
s5021, if yes, finishing adjustment;
s5022, if not, down-regulating the first-stage Txpwr, and feeding back the down-regulated Txpwr serving as a Txpwr theoretical value to a remote station;
s602, the remote station adjusts the Txpwr of the transmitting channel according to the received Txpwr theoretical value;
looping through steps S1, S2, S5, S500, S502, S5022 and S602, if the actual value of Txpwr reaches the lower limit of Txpwr of the link configuration and step S5022 does not hold, step S5021 is executed, that is, the adjustment is ended.
Example 5
The embodiment provides an automatic control system based on satellite link communication power and modulation mode, as shown in fig. 1, including a master station and a plurality of remote stations;
remote station for periodic acquisition ES/N0Actual value and fed back to the master station, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel; meanwhile, receiving a ModCod theoretical value or a Txpwr theoretical value fed back by the master station, and adjusting the ModCod or Txpwr of a transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value;
a master station for receiving feedback from the remote stationS/N0Actual value, and for received ES/N0Carrying out moving average processing on the actual value; and is based on processed ES/N0Actual value, by querying ES/N0Modcod table entries for automatically adjusting the ModCod or Txpwr of the link to determine a ModCod theoretical value or Txpwr theoretical value and feeding back the ModCod theoretical value or Txpwr theoretical value to the remote station.
As shown in FIG. 1, the remote station acquires E in real timeS/N0Feeding back the actual value to the master station; the master station receives the feedback E from the remote stationS/N0After the actual value is subjected to the sliding average processing, automatically adjusting ModCod or Txpwr of a link, and determining a ModCod theoretical value or Txpwr theoretical value to be fed back to a remote station; the remote station adjusts the parameters of the transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value, so that E fed back to the master stationS/N0The actual value changes along with the change; the master station receiving the latest ES/N0The actual values again adjust the link and determine the theoretical values, and finally the remote station's transmit channel parameters are adjusted to the optimum state.
Specifically, the automatic adjustment of ModCod or Txpwr of the link to determine the ModCod theoretical value or Txpwr theoretical value, as shown in fig. 3, includes:
determining E received over a period of timeS/N0Whether the actual values are all higher than E corresponding to ModCod lower limit of link configurationS/N0A threshold;
if yes, the current link state is excellent, and the current E is inquired and judgedS/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod upper limit of the link configuration;
if not, adjusting the ModCod, and taking the adjusted ModCod as a ModCod theoretical value;
if yes, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr lower limit of the link configuration or not;
if yes, finishing the adjustment;
if not, down-regulating Txpwr, and taking the down-regulated Txpwr as a Txpwr theoretical value;
if not, the current link state is poor, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr upper limit or not;
if not, adjusting the Txpwr, and taking the adjusted Txpwr as a Txpwr theoretical value;
if yes, inquiring and judging the current ES/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod lower limit of the link configuration;
if yes, finishing the adjustment;
and if not, down-regulating the ModCod, and taking the down-regulated ModCod as a ModCod theoretical value.
Example 6
The present embodiment provides an automatic control system based on satellite link communication power and modulation mode, as shown in fig. 8, including:
a data receiving module for receiving the feedback E of the remote stationS/N0An actual value; wherein E isS/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel;
a data processing module for receiving ES/N0Carrying out moving average processing on the actual value;
a link control module for processing the ES/N0Actual value, by querying ES/N0The Modcod table entry regulates and controls ModCod or Txpwr of the link and determines a ModCod theoretical value or Txpwr theoretical value;
the data sending module is used for feeding back the ModCod theoretical value or the Txpwr theoretical value to the remote station so that the remote station can adjust the ModCod or the Txpwr of the transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value;
the link control module is configured to automatically adjust the ModCod or Txpwr of the link to determine a ModCod theoretical value or a Txpwr theoretical value, a control principle of the link control module is shown in fig. 3, and a specific process is the same as that in embodiment 6 and is not described again.
As shown in fig. 8, the data receiving module receives feedback E from the remote stationS/N0After the actual value, the data processing module pairs the received ES/N0Carrying out moving average processing on the actual value; according to the control principle as shown in FIG. 3, the link control module is based on the processed ES/N0Actual value, by querying ES/N0The Modcod table entry regulates and controls ModCod or Txpwr of the link and determines a ModCod theoretical value or Txpwr theoretical value; and the data sending module feeds back the ModCod theoretical value or the Txpwr theoretical value to the remote station so that the remote station adjusts the ModCod or Txpwr of the transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value. E for the remote station to adjust the transmission channel parameters and to feed backS/N0The actual value changes in real time, and the data receiving module receives the latest ES/N0After the actual value is processed again by the data processing module, the link control module regulates and controls the ModCod or Txpwr of the link again, and determines a new ModCod theoretical value or Txpwr theoretical value again, so that the remote station regulates and controls the ModCod or Txpwr of the transmission channel again, and the remote station regulates and controls the ModCod or Txpwr in this way circularly, and finally regulates the transmission state to be the optimal state.
Example 7
The present embodiment provides an automatic control system based on satellite link communication power and modulation mode, as shown in fig. 9, including:
a data acquisition module for periodically acquiring ES/N0Actual value, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel;
a data feedback module for collecting ES/N0The actual value is fed back to the master station and the master station is enabled to act according to ES/N0The actual value is processed by a sliding average and E within a period of time is judgedS/N0Whether the actual values are all higher than E corresponding to ModCod lower limit of link configurationS/N0And a threshold, automatically adjusting the ModCod or Txpwr of the link according to the determination result to determine a ModCod theoretical value or Txpwr theoretical value, wherein a control principle is as shown in fig. 3, and a specific process of adjusting the link to determine the ModCod theoretical value or Txpwr theoretical value is the same as that in embodiment 6, and is not described again.
And the link adjusting module is used for receiving the ModCod theoretical value or the Txpwr theoretical value fed back by the main station and adjusting the ModCod or the Txpwr of the transmitting channel.
As shown in FIG. 9, the data acquisition module periodically acquires ES/N0An actual value; e to be acquired by data feedback moduleS/N0The actual value is fed back to the master station and the master station is enabled to act according to ES/N0The actual value is processed by a sliding average and E within a period of time is judgedS/N0Whether the actual values are all higher than E corresponding to ModCod lower limit of link configurationS/N0A threshold, according to the control principle shown in fig. 3, automatically adjusting ModCod or Txpwr of the link according to the judgment result to determine a ModCod theoretical value or Txpwr theoretical value; and after receiving the ModCod theoretical value or the Txpwr theoretical value fed back by the master station, the link adjusting module adjusts the ModCod or Txpwr of the transmitting channel. After the parameters of the transmitting channel are adjusted, the data acquisition module and the data feedback module acquire and feed back to the E of the master stationS/N0The actual value changes in real time so that the master station receives the latest ES/N0After the actual value is processed, the ModCod or Txpwr of the link is regulated again, a new ModCod theoretical value or Txpwr theoretical value is determined again and fed back to the link regulation module, the ModCod or Txpwr of the transmitting channel is regulated again by the link regulation module, and the ModCod or Txpwr is regulated in a circulating mode and finally regulated to the optimal transmitting state.
The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.

Claims (8)

1. An automatic control method based on satellite link communication power and a modulation mode is applied to a main station and is characterized by comprising the following steps:
e for receiving periodic collection feedback of remote stationS/N0Actual value, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel;
for received ES/N0Carrying out moving average processing on the actual value;
according to E after treatmentS/N0Actual value, by querying ES/N0The Modcod table entry automatically adjusts the Modcod or Txpwr of the link and determines the Modcod theoretical value or Txpwr theoretical value;
feeding back the ModCod theoretical value or the Txpwr theoretical value to the remote station so that the remote station adjusts the ModCod and Txpwr of the transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value;
the method for adjusting the ModCod or Txpwr of the link comprises the following steps:
determining E received over a period of timeS/N0Whether the actual values are all higher than E corresponding to ModCod lower limit of link configurationS/N0A threshold;
if yes, the current link state is excellent, and the current E is inquired and judgedS/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod upper limit of the link configuration;
if not, up-regulating the ModCod, and taking the up-regulated ModCod as a ModCod theoretical value fed back to the remote station;
if yes, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr lower limit of the link configuration or not;
if yes, finishing the adjustment;
if not, down-regulating Txpwr, and taking the down-regulated Txpwr as a Txpwr theoretical value fed back to the remote station;
if not, the current link state is poor, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr upper limit or not;
if not, adjusting the Txpwr, and taking the adjusted Txpwr as a Txpwr theoretical value fed back to the remote station;
if yes, inquiring and judging the current ES/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod lower limit of the link configuration;
if yes, finishing the adjustment;
if not, the ModCod is adjusted downwards, and the adjusted ModCod is used as a ModCod theoretical value fed back to the remote station.
2. An automatic control method based on satellite link communication power and modulation mode is applied to a remote station and is characterized by comprising the following steps:
periodic acquisition ES/N0Actual value and fed back to the master station, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel;
receiving a ModCod theoretical value or a Txpwr theoretical value fed back by a master station, and adjusting the ModCod and Txpwr of a transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value;
the ModCod theoretical value or the Txpwr theoretical value refers to the value of ES/N0After the actual value is fed back to the master station, the master station receives ES/N0The actual value is subjected to a running average process by a query ES/N0The Modcod table entry adjusts the ModCod or Txpwr of the link according to the link state, so as to determine the ModCod theoretical value or Txpwr theoretical value;
the method for adjusting the ModCod or Txpwr of the link comprises the following steps:
determining E received over a period of timeS/N0Whether the actual values are all higher than E corresponding to ModCod lower limit of link configurationS/N0A threshold;
if yes, the current link state is excellent, and the current E is inquired and judgedS/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod upper limit of the link configuration;
if not, up-regulating the ModCod, and taking the up-regulated ModCod as a ModCod theoretical value fed back to the remote station;
if yes, inquiring and judging the current ES/N0Whether the Txpwr actual value corresponding to the actual value reaches the Txpwr lower limit of the link configuration or not;
if yes, finishing the adjustment;
if not, down-regulating Txpwr, and taking the down-regulated Txpwr as a Txpwr theoretical value fed back to the remote station;
if not, the current link state is poor, inquiring and judging the current ES/N0Whether the actual value of Txpwr corresponding to the actual value reaches the upper limit of Txpwr,
if not, adjusting the Txpwr, and taking the adjusted Txpwr as a Txpwr theoretical value fed back to the remote station;
if yes, inquiring and judging the current ES/N0Whether the actual ModCod value corresponding to the actual value reaches the ModCod lower limit of the link configuration;
if yes, finishing the adjustment;
if not, the ModCod is adjusted downwards, and the adjusted ModCod is used as a ModCod theoretical value fed back to the remote station.
3. Method for automatic control of communication power and modulation mode based on satellite links according to claim 1 or 2, characterized in that during the adjustment of the Txpwr of the link, according to ES/N0Whether the actual value has reached E corresponding to the lower limit of ModCodS/N0And determining the adjustment amplitude by a threshold, adjusting Txpwr in a step-by-step manner if the adjustment amplitude reaches the threshold, and adjusting Txpwr in a step-by-step manner if the adjustment amplitude does not reach the threshold.
4. The automatic control method based on the communication power and the modulation mode of the satellite link according to claim 1 or 2, wherein the upper limit of Txpwr is the rated maximum transmission power Pm; based on reference transmission power Pr and reference symbol rate Rr, in combination with the maximum modulation code rate configured by the link and the current symbol rate Ra, considering the transmission power fading reserve margin, the calculation formula of the rated maximum transmission power is as follows: pm ═ Pr +10log (Ra/Rr) +. DELTA.Th + margin.
5. The automatic control method based on satellite link communication power and modulation mode according to claim 1 or 2,wherein the master station receives feedback from a plurality of remote stations ES/N0After the actual value, with the lowest ES/N0The actual value is the ModCod or Txpwr of the quasi-adjusted link.
6. An automatic control system based on satellite link communication power and a modulation mode is characterized by comprising a main station and a plurality of remote stations;
remote station for periodic acquisition ES/N0Actual value and fed back to the master station, wherein ES/N0The actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel; meanwhile, receiving a ModCod theoretical value or a Txpwr theoretical value fed back by the master station, and adjusting the ModCod and Txpwr of a transmitting channel according to the ModCod theoretical value or the Txpwr theoretical value;
a master station for receiving feedback from the remote stationS/N0Actual value, and for received ES/N0Carrying out moving average processing on the actual value; according to E after treatmentS/N0Actual value, by querying ES/N0-Modcod entries determining the Modcod theoretical value or Txpwr theoretical value according to the method of claim 1 or 2; the ModCod theoretical value or the Txpwr theoretical value is fed back to the remote station.
7. The automatic control system according to claim 6, wherein the master station comprises the following modules:
a data receiving module for receiving the feedback E of the remote stationS/N0An actual value;
data processing module for received ES/N0Carrying out moving average processing on the actual value;
link control module according to processed ES/N0Actual value, by querying ES/N0The Modcod table entry regulates and controls ModCod or Txpwr of the link and determines a ModCod theoretical value or Txpwr theoretical value;
and the data sending module feeds back the Modcod theoretical value or the Txpwr theoretical value to the remote station.
8. The automatic control system according to claim 6, wherein the remote station comprises the following modules:
a data acquisition module for periodically acquiring ES/N0The actual value is fed back to the master station;
the data receiving module is used for receiving the Modcod theoretical value or the Txpwr theoretical value fed back by the master station;
and the link adjusting module adjusts the ModCod and Txpwr of the transmitting channel according to the received ModCod theoretical value or Txpwr theoretical value.
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