CN111200458A - 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 PDFInfo
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Abstract
The automatic control method based on the satellite link communication power and the modulation mode comprises the following steps: receiving ES/N0 actual values fed back by the remote station in a periodic collection manner, wherein the ES/N0 actual values dynamically change according to ModCod and Txpwr of a current remote station transmitting channel; carrying out moving average processing on the received ES/N0 actual value; inquiring ES/N0-Modcod table entries according to the processed ES/N0 actual value, and automatically adjusting ModCod or Txpwr of a link to determine a ModCod theoretical value or Txpwr theoretical value; 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
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:
receiving ES/N0 actual values fed back by the remote station in a periodic collection manner, wherein the ES/N0 actual values dynamically change according to ModCod and Txpwr of a current remote station transmitting channel;
carrying out moving average processing on the received ES/N0 actual value;
according to the processed ES/N0 actual value, automatically adjusting ModCod or Txpwr of the link by inquiring ES/N0-Modcod table items to determine 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 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:
judging whether the actual values of the ES/N0 received in a period of time are all higher than an ES/N0 threshold corresponding to the Modcod lower limit of the link configuration;
if yes, inquiring and judging whether the ModCod actual value corresponding to the current ES/N0 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 whether the Txpwr actual value corresponding to the current ES/N0 actual value reaches the Txpwr lower limit of the link configuration;
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 whether the Txpwr actual value corresponding to the current ES/N0 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 whether the ModCod actual value corresponding to the current ES/N0 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 the Txpwr is adjusted upwards, the adjustment amplitude is determined according to whether the actual value of ES/N0 has reached the ES/N0 threshold corresponding to the Modcod lower limit, if so, the Txpwr is adjusted step by step, and if not, the Txpwr is adjusted step by step.
And considering the transmission power fading reserve margin based on the reference transmission power Pr and the reference symbol rate Rr, wherein the calculation formula of the rated maximum transmission power is Pm which is Pr +10log (Ra/Rr) + △ Th + margin.
Specifically, the setting range of the rated maximum transmission power:
1. when the ACM is started, the maximum ModCod is changed, and △ Th is the difference value between the maximum ModCod threshold and the reference ModCod threshold;
2. when the ACM is closed, the ModCod is set to be changed currently, and △ Th is the difference value between the currently set ModCod threshold and the reference ModCod threshold;
3. the Ra symbol rate changes, including bandwidth and roll-off factor.
Further, since the master TDM carrier is a point-to-multipoint carrier, it may receive ES/N0 feedbacks from multiple remote stations, in this case, if the actual ES/N0 feedbacks from multiple remote stations are received, the lowest ES/N0 actual value is used to perform the 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:
the method comprises the steps of periodically acquiring an ES/N0 actual value and feeding back the actual value to a master station, wherein the ES/N0 actual value dynamically changes according to ModCod and Txpwr of a 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 ModCod theoretical value or the Txpwr theoretical value determined by feeding back the ES/N0 actual value to the master station so that the master station performs the sliding average processing on the received ES/N0 actual value and adjusting the ModCod or Txpwr of the link according to the link state by inquiring the ES/N0-Modcod table item;
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:
enabling the master station to judge whether the actual values of the ES/N0 received within a period of time are all higher than an ES/N0 threshold corresponding to the Modcod lower limit of the link configuration, and performing the following operations according to the judgment result;
if yes, inquiring and judging whether the ModCod actual value corresponding to the current ES/N0 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 whether the Txpwr actual value corresponding to the current ES/N0 actual value reaches the Txpwr lower limit of the link configuration;
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 whether the Txpwr actual value corresponding to the current ES/N0 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 whether the ModCod actual value corresponding to the current ES/N0 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 the Txpwr is adjusted upwards, the adjustment amplitude is determined according to whether the actual value of ES/N0 has reached the ES/N0 threshold corresponding to the Modcod lower limit, if so, the Txpwr is adjusted step by step, and if not, the Txpwr is adjusted step by step.
And considering the transmission power fading reserve margin based on the reference transmission power Pr and the reference symbol rate Rr, wherein the calculation formula of the rated maximum transmission power is Pm which is Pr +10log (Ra/Rr) + △ 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;
the remote station is used for periodically acquiring the actual value of ES/N0 and feeding back the actual value to the master station, wherein the actual value of ES/N0 dynamically changes according to ModCod and Txpwr of a 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;
the main station is used for receiving the ES/N0 actual value fed back by the remote station and carrying out moving average processing on the received ES/N0 actual value; the ModCod or Txpwr of the link is automatically adjusted by inquiring ES/N0-Modcod table items according to the processed ES/N0 actual value to determine the ModCod theoretical value or Txpwr theoretical value, and the ModCod theoretical value or Txpwr theoretical value is fed back 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:
judging whether the actual values of the ES/N0 received in a period of time are all higher than an ES/N0 threshold corresponding to the Modcod lower limit of the link configuration;
if yes, inquiring and judging whether the ModCod actual value corresponding to the current ES/N0 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 whether the Txpwr actual value corresponding to the current ES/N0 actual value reaches the Txpwr lower limit of the link configuration;
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 whether the Txpwr actual value corresponding to the current ES/N0 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 whether the ModCod actual value corresponding to the current ES/N0 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:
the data receiving module is used for receiving the ES/N0 actual value fed back by the remote station; wherein, the actual value of ES/N0 dynamically changes according to ModCod and Txpwr of the current remote station transmitting channel;
the data processing module is used for carrying out moving average processing on the received ES/N0 actual value;
the link control module is used for regulating and controlling ModCod or Txpwr of the link by inquiring the ES/N0-Modcod table entry according to the processed ES/N0 actual value and determining the 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:
judging whether the actual values of the ES/N0 received in a period of time are all higher than an ES/N0 threshold corresponding to the Modcod lower limit of the link configuration;
if yes, inquiring and judging whether the ModCod actual value corresponding to the current ES/N0 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 whether the Txpwr actual value corresponding to the current ES/N0 actual value reaches the Txpwr lower limit of the link configuration;
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 whether the Txpwr actual value corresponding to the current ES/N0 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 whether the ModCod actual value corresponding to the current ES/N0 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:
the data acquisition module is used for periodically acquiring the actual value of ES/N0, wherein the actual value of ES/N0 dynamically changes according to ModCod and Txpwr of the current remote station transmitting channel;
the data feedback module is used for feeding back the acquired ES/N0 actual values to the master station, enabling the master station to perform sliding average processing according to the ES/N0 actual values, judging whether the ES/N0 actual values in a period of time are all higher than an ES/N0 threshold corresponding to the Modcod lower limit of link configuration, and performing the following operations according to the judgment result;
if yes, inquiring and judging whether the ModCod actual value corresponding to the current ES/N0 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 whether the Txpwr actual value corresponding to the current ES/N0 actual value reaches the Txpwr lower limit of the link configuration;
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 whether the Txpwr actual value corresponding to the current ES/N0 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 whether the ModCod actual value corresponding to the current ES/N0 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: judging whether an ES/N0 threshold corresponding to the ModCod lower limit of link configuration is reached or not according to the fed back ES/N0 actual value, and if so, quickly amplifying the power; monitoring the change condition of the ES/N0 actual value acquired by the remote station in real time, and if the ES/N0 actual value is gradually increased and the link state is continuously improved, adjusting the ModCod; if the actual value of the ES/N0 fluctuates within a certain range of the threshold of ES/N0 corresponding to the target ModCod, the adjustment is not performed; when the ModCod is adjusted to the ModCod upper limit of the link configuration, the actual value of the link ES/N0 is still higher than the ES/N0 threshold corresponding to the current ModCod upper limit, and the link state is still good, then an attempt is made to reduce the transmission power until the transmission power reaches the lowest value for normal operation of the equipment (the lowest transmission power of various types of communication equipment is different).
5. Scene description: the remote station feeds back ES/N0 to the master station through the satellite according to the link state; after receiving ES/N0 corresponding to each remote station, the master station processes ES/N0 data by a moving average calculation method and submits the result to a link control module. The link control module queries the ES/N0 value and the corresponding modecode entry, calculates the corresponding ModCod/Txpwr, and feeds 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. ModCod/Txpwr calculation relies on querying the ES/N0 value and the corresponding modecode entry, which is a representation of the satellite device transmission performance, through the ES/N0-ModCod entry.
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:
receiving ES/N0 actual values fed back by the remote station in a periodic collection manner, wherein the ES/N0 actual values dynamically change according to ModCod and Txpwr of a current remote station transmitting channel;
carrying out moving average processing on the received ES/N0 actual value;
according to the processed ES/N0 actual value, automatically adjusting ModCod or Txpwr of the link by inquiring ES/N0-Modcod table items to determine the ModCod theoretical value or Txpwr theoretical value;
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 main 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 the transmission channel according to the ModCod theoretical value or the Txpwr parameter, so that the actual value of ES/N0 fed back by the remote station changes, after the main station receives the latest actual value of ES/N0 of the remote station, the main station processes data again and determines the theoretical value, thereby forming a closed loop, and finally adjusting the transmission channel parameter of the remote station 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:
judging whether the actual values of the ES/N0 received in a period of time are all higher than an ES/N0 threshold corresponding to the Modcod lower limit of the link configuration; (the time period of judgment can be specifically determined according to the actual conditions of the equipment)
If yes, inquiring and judging whether the ModCod actual value corresponding to the current ES/N0 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 whether the Txpwr actual value corresponding to the current ES/N0 actual value reaches the Txpwr lower limit of the link configuration;
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 whether the Txpwr actual value corresponding to the current ES/N0 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 whether the ModCod actual value corresponding to the current ES/N0 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 the Txpwr is adjusted upwards, the adjustment amplitude is determined according to whether the actual value of ES/N0 has reached the ES/N0 threshold corresponding to the Modcod lower limit, if so, the Txpwr is adjusted quickly, and if not, the Txpwr is adjusted step by step.
Specifically, the Txpwr upper limit refers to a rated maximum transmission power Pm, as shown in fig. 2, based on a reference transmission power Pr and a reference symbol rate Rr, in combination with a maximum modulation code rate of a link configuration and a current symbol rate Ra, a transmit power fading margin is considered, and a calculation formula of the rated maximum transmission power is that Pm is Pr +10log (Ra/Rr) + △ Th + margin.
Specifically, the setting range of the rated maximum transmission power:
1. when the ACM is started, the maximum ModCod is changed, and △ Th is the difference value between the maximum ModCod threshold and the reference ModCod threshold;
2. when the ACM is closed, the ModCod is set to be changed currently, and △ Th is the difference value between the currently set ModCod threshold and the reference ModCod threshold;
3. the Ra symbol rate changes, including bandwidth and roll-off factor.
Further, since the master TDM carrier is a point-to-multipoint carrier, it may receive ES/N0 feedbacks from multiple remote stations, in this case, if the actual ES/N0 feedbacks from multiple remote stations are received, the lowest ES/N0 actual value is used to perform the running average to adjust the ModCod or Txpwr of the link.
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:
the method comprises the steps of periodically acquiring an ES/N0 actual value and feeding back the actual value to a master station, wherein the ES/N0 actual value dynamically changes according to ModCod and Txpwr of a 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 a ModCod theoretical value or a Txpwr theoretical value determined by feeding back an ES/N0 actual value to the master station so that the master station performs moving average processing on the received ES/N0 actual value and adjusting ModCod or Txpwr of a link according to the link state by querying an ES/N0-Modcod table entry.
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 transmission channel accordingly, so that the actual value of ES/N0 fed back to the master station changes accordingly, so that after receiving the latest actual value of ES/N0, the master station performs data processing again and determines the theoretical value, and the remote station adjusts the transmission channel parameter again according to the received ModCod theoretical value or Txpwr theoretical value, thereby forming a closed loop, and finally adjusting the transmission channel parameter of the remote station 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
In this embodiment, on the basis of embodiment 1 and embodiment 2, an automatic control method based on the communication power and modulation mode of the satellite link is provided when the link status is poor, and when the link status is poor, the actual value of ES/N0 has already reached the ES/N0 threshold corresponding to the ModCod lower limit of the link configuration, and at this time, the transmission power should be quickly amplified in order to ensure the link communication quality.
Description of the overall process: and under the condition that the link state is poor and the actual value of the ES/N0 is poor, the current actual transmission modulation code rate is assumed to be larger than the lowest modulation code rate. When the receiving end judges that the receiving ES/N0 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 figure 2, and the actual regulation and control process can refer to figure 3; when the transmission power reaches the maximum value of the device, and the actual value of the ES/N0 is still lower than the threshold of the ES/N0 corresponding to the current modulation code rate, the modulation code rate starts to be reduced, referring to fig. 1 and fig. 3, until the lowest modulation code rate of the link configuration is reduced. The amplitude is adjusted according to whether the actual value of the ES/N0 reaches the ES/N0 threshold corresponding to the lowest modulation mode/modulation code rate of ACM configuration, if so, the amplitude must be adjusted quickly, and if not, the amplitude can be adjusted gradually.
Purpose of automatic adjustment of transmission power:
a) the influence of external factors such as rain attenuation, cloud cover shielding, ionosphere radiation and the like on the signal quality is resisted, and the remote station receives the ES/No with high enough so as to increase the transmission reliability of the satellite link;
b) the received ES/N0 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.
Specifically, if the actual value of ES/N0 received in a period of time completely or partially reaches or is lower than the ES/N0 threshold corresponding to the ModCod lower limit of the link configuration, the current link status is poor. 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:
and S1, the remote station periodically collects the fed back ES/N0 actual value and feeds back the value to the master station, wherein the ES/N0 actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel.
S2, the main station carries out moving average processing on the received ES/N0 actual value.
And S3, according to the processed ES/N0 actual value, the Modcod or Txpwr of the link is automatically adjusted in real time by inquiring ES/N0-Modcod table entries.
Adjusting the ModCod or Txpwr of a link includes the steps of:
s300, inquiring an ES/N0-ModCod table entry, and judging whether the Txpwr actual value corresponding to the current ES/N0 actual value reaches the Txpwr upper limit;
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 the S300 is yes, inquiring and judging whether the ModCod actual value corresponding to the current ES/N0 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
In this embodiment, on the basis of embodiment 1 and embodiment 2, an automatic control method based on satellite link communication power and modulation mode is provided when the link state is good, and when the link state is good, the actual value of ES/N0 is higher than the ES/N0 threshold corresponding to the ModCod lower limit of the link configuration, and at this time, the modulation code rate of the link may be increased to increase the link communication speed.
Overall scheme description:
under the condition that the ES/N0 is continuously better and the link state is better, the received ES/N0 actual value reaches the ES/N0 threshold corresponding to the maximum modulation code rate, and the actual modulation code rate is smaller than the maximum value of the link configuration. As shown in fig. 1, after receiving the ES/N0 actual value fed back by the remote station, the master station determines that the ES/N0 actual value is in the up-modulation range of the current modulation code rate, and increases the first-order modulation code rate, at this time, the power does not change, and the modulation code rate up-modulation process can refer to fig. 3. And circulating the steps until the modulation code rate is adjusted to the configured maximum modulation mode/code rate, and then judging that the actual value of the current ES/N0 is still higher than the threshold of ES/N0 corresponding to the current increased modulation code rate. 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.
Specifically, if the actual values of the received ES/N0 in a period of time are all higher than the ES/N0 threshold corresponding to the ModCod lower limit of the link configuration, the current link status is good. 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:
and S1, the remote station periodically collects the fed back ES/N0 actual value and feeds back the value to the master station, wherein the ES/N0 actual value dynamically changes according to the ModCod and Txpwr of the current remote station transmitting channel.
S2, the main station carries out moving average processing on the received ES/N0 actual value.
And S5, according to the processed ES/N0 actual value, the Modcod or Txpwr of the link is automatically adjusted in real time by inquiring ES/N0-Modcod table entries.
Adjusting the ModCod or Txpwr of a link includes the steps of:
s500, inquiring an ES/N0-ModCod table entry, and judging whether the ModCod actual value corresponding to the current ES/N0 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 whether the Txpwr actual value corresponding to the current ES/N0 actual value reaches the Txpwr lower limit of the link configuration;
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;
the remote station is used for periodically acquiring the actual value of ES/N0 and feeding back the actual value to the master station, wherein the actual value of ES/N0 dynamically changes according to ModCod and Txpwr of a 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;
the main station is used for receiving the ES/N0 actual value fed back by the remote station and carrying out moving average processing on the received ES/N0 actual value; and the ModCod or Txpwr of the link is automatically adjusted by inquiring the ES/N0-Modcod table entry according to the processed ES/N0 actual value to determine the ModCod theoretical value or Txpwr theoretical value, and the ModCod theoretical value or Txpwr theoretical value is fed back to the remote station.
As shown in FIG. 1, the remote station collects the ES/N0 actual value in real time and feeds back the value to the master station; the main station receives the ES/N0 actual value fed back by the remote station, automatically adjusts ModCod or Txpwr of the link after the sliding average processing, and determines the ModCod theoretical value or Txpwr theoretical value to feed back to the 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 the actual value of ES/N0 fed back to the master station changes along with the ModCod theoretical value or the Txpwr theoretical value; the master station adjusts the link again according to the received latest ES/N0 actual value and determines the theoretical value, and finally the remote station's transmission channel parameters are adjusted to the best 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:
judging whether the actual values of the ES/N0 received in a period of time are all higher than an ES/N0 threshold corresponding to the Modcod lower limit of the link configuration;
if yes, inquiring and judging whether the ModCod actual value corresponding to the current ES/N0 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 whether the Txpwr actual value corresponding to the current ES/N0 actual value reaches the Txpwr lower limit of the link configuration;
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 whether the Txpwr actual value corresponding to the current ES/N0 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 whether the ModCod actual value corresponding to the current ES/N0 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:
the data receiving module is used for receiving the ES/N0 actual value fed back by the remote station; wherein, the actual value of ES/N0 dynamically changes according to ModCod and Txpwr of the current remote station transmitting channel;
the data processing module is used for carrying out moving average processing on the received ES/N0 actual value;
the link control module is used for regulating and controlling ModCod or Txpwr of the link by inquiring the ES/N0-Modcod table entry according to the processed ES/N0 actual value and determining the 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, after the data receiving module receives the ES/N0 actual value fed back by the remote station, the data processing module performs a moving average process on the received ES/N0 actual value; according to the control principle shown in fig. 3, the link control module regulates and controls Modcod or Txpwr of the link by inquiring the ES/N0-Modcod table entry according to the processed ES/N0 actual value, and determines the 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. After the remote station adjusts the parameters of the transmitting channel, the fed back actual value of ES/N0 changes in real time, the data receiving module receives the latest actual value of ES/N0, the data processing module processes the actual value again, the link control module regulates the ModCod or Txpwr of the link again, and determines the new ModCod theoretical value or Txpwr theoretical value again, so that the remote station regulates the ModCod or Txpwr of the transmitting channel again, and the remote station regulates the ModCod or Txpwr cyclically in this way and finally adjusts the transmitting channel to the optimal transmitting 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:
the data acquisition module is used for periodically acquiring the actual value of ES/N0, wherein the actual value of ES/N0 dynamically changes according to ModCod and Txpwr of the current remote station transmitting channel;
a data feedback module, configured to feed back the acquired ES/N0 actual value to the master station, enable the master station to perform sliding average processing according to the ES/N0 actual value, determine whether the ES/N0 actual values in a period of time are all higher than an ES/N0 threshold corresponding to a ModCod lower limit of a link configuration, automatically adjust ModCod or Txpwr of the link according to the determination result to determine a ModCod theoretical value or Txpwr theoretical value, where 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 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 actual values of ES/N0; the data feedback module feeds back the acquired ES/N0 actual value to the master station, the master station performs sliding average processing according to the ES/N0 actual value, judges whether the ES/N0 actual values in a period of time are all higher than an ES/N0 threshold corresponding to the Modcod lower limit of the link configuration, and automatically adjusts the Modcod or Txpwr of the link according to the judgment result to determine the Modcod theoretical value or Txpwr theoretical value according to the control principle shown in FIG. 3; 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 actual ES/N0 values acquired and fed back to the master station by the data acquisition module and the data feedback module change in real time, so that the master station receives the latest actual ES/N0 value, processes the actual ES/N0 value to regulate the ModCod or Txpwr of the link again, determines a new ModCod theoretical value or Txpwr theoretical value again and feeds back the new ModCod theoretical value or Txpwr theoretical value to the link adjustment module, and the link adjustment module adjusts the ModCod or Txpwr of the transmitting channel again, so that the optimal transmitting state is adjusted in a circulating regulation mode.
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:
receiving ES/N0 actual values fed back by the remote station in a periodic collection manner, wherein the ES/N0 actual values dynamically change according to ModCod and Txpwr of a current remote station transmitting channel;
carrying out moving average processing on the received ES/N0 actual value;
according to the processed ES/N0 actual value, automatically adjusting ModCod or Txpwr of a link by inquiring ES/N0-Modcod table entries, and determining a 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:
judging whether the actual values of the ES/N0 received in a period of time are all higher than an ES/N0 threshold corresponding to the Modcod lower limit of the link configuration;
if yes, inquiring and judging whether the ModCod actual value corresponding to the current ES/N0 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 whether the Txpwr actual value corresponding to the current ES/N0 actual value reaches the Txpwr lower limit of the link configuration;
if yes, finishing the adjustment;
if not, the Txpwr is down-regulated, and the down-regulated Txpwr is used as a Txpwr theoretical value which is fed back to the remote station and is fed back to the remote station;
if not, the current link state is poor, inquiring and judging whether the Txpwr actual value corresponding to the current ES/N0 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 whether the ModCod actual value corresponding to the current ES/N0 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:
the method comprises the steps of periodically acquiring an ES/N0 actual value and feeding back the actual value to a master station, wherein the ES/N0 actual value dynamically changes according to ModCod and Txpwr of a 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 ModCod theoretical value or the Txpwr theoretical value determined by feeding back the ES/N0 actual value to the master station, performing the sliding average processing on the received ES/N0 actual value by the master station, and adjusting the ModCod or the Txpwr of the link according to the link state by inquiring the ES/N0-Modcod table entry;
the method for adjusting the ModCod or Txpwr of the link comprises the following steps:
judging whether the actual values of the ES/N0 received in a period of time are all higher than an ES/N0 threshold corresponding to the Modcod lower limit of the link configuration;
if yes, inquiring and judging whether the ModCod actual value corresponding to the current ES/N0 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 whether the Txpwr actual value corresponding to the current ES/N0 actual value reaches the Txpwr lower limit of the link configuration;
if yes, finishing the adjustment;
if not, the Txpwr is down-regulated, and the down-regulated Txpwr is used as a Txpwr theoretical value which is fed back to the remote station and is fed back to the remote station;
if not, the current link state is poor, inquiring and judging whether the Txpwr actual value corresponding to the current ES/N0 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 whether the ModCod actual value corresponding to the current ES/N0 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. The method as claimed in claim 1 or 2, wherein during adjusting Txpwr of the link, the adjusting amplitude is determined according to whether the actual value of ES/N0 has reached the ES/N0 threshold corresponding to the ModCod lower limit, if so, the Txpwr is adjusted by steps, and if not, the Txpwr is adjusted by steps.
4. The automatic control method based on the satellite link communication power and the modulation mode according to claim 1 or 2, characterized in that the upper limit of Txpwr is the rated maximum transmission power Pm, and based on the reference transmission power Pr and the reference symbol rate Rr, the calculation formula of the rated maximum transmission power is Pm-Pr +10log (Ra/Rr) + △ Th + margin considering the transmission power fading margin in combination with the maximum modulation code rate configured for the link and the current symbol rate Ra.
5. The method of claim 1 or 2, wherein the primary station receives ES/N0 actual values fed back from the plurality of remote stations, and adjusts ModCod or Txpwr of the link based on the lowest ES/N0 actual value.
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;
the remote station is used for periodically acquiring the actual value of ES/N0 and feeding back the actual value to the master station, wherein the actual value of ES/N0 dynamically changes according to ModCod and Txpwr of a 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;
the main station is used for receiving the ES/N0 actual value fed back by the remote station and carrying out moving average processing on the received ES/N0 actual value; determining a ModCod theoretical value or a Txpwr theoretical value according to the method of claim 1 or 2 by inquiring ES/N0-Modcod table entries according to the processed ES/N0 actual value; 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:
the data receiving module is used for receiving the ES/N0 actual value fed back by the remote station;
the data processing module is used for carrying out moving average processing on the received ES/N0 actual value;
the link control module regulates and controls ModCod or Txpwr of the link by inquiring the ES/N0-Modcod table entry according to the processed ES/N0 actual value and determines the 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:
the data acquisition module is used for periodically acquiring the actual ES/N0 value and feeding back the actual ES/N0 value 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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