A microwave communication radio frequency power adaptive control method and system based on link state perception

Abstract

This invention discloses a microwave communication RF power adaptive control method and system based on link state awareness, relating to the field of microwave communication technology. The method includes: collecting data on received signal quality, bit error rate, retransmission count, modulation and coding scheme, link fading rate, communication distance, RF device operating temperature, and power adjustment records of the microwave communication link; aligning the data according to the data generation time and statistical window to construct a link state evolution sequence; and identifying short-term obstruction, continuous fading, sudden interference, and link recovery states. By mapping the receiver feedback reports to their actual sampling and statistical periods, and processing reports that are repetitive, out of order, missing, or cross power action or modulation and coding scheme switching boundaries, the link state data has consistent temporal semantics.

Description

Technical Field

[0001] This invention relates to the field of microwave communication technology, and more specifically, to a method and system for adaptive control of microwave communication radio frequency power based on link state awareness. Background Technology

[0002] Microwave communication features large transmission capacity, short deployment cycle, and flexible networking, and is widely used in mobile communication backhaul, dedicated communication networks, emergency communication, and cross-regional point-to-point data transmission. However, microwave signals are susceptible to attenuation from rainfall, multipath effects, obstruction by moving objects, antenna offset, and interference from the same or adjacent channels during propagation, causing variations in received signal level, signal-to-noise ratio, bit error rate, and retransmission count. To ensure link availability, microwave communication equipment typically needs to adjust the transmitter's RF power based on link quality feedback from the receiver.

[0003] Existing RF power control methods mainly include fixed power control and automatic transmit power control based on received signal level or signal-to-noise ratio thresholds. Fixed power control typically reserves a large link margin under the most unfavorable propagation conditions, which can easily cause the power amplifier to operate at a high output state for a long time, increasing equipment power consumption and RF device thermal load. Threshold-based automatic transmit power control can increase power when link quality deteriorates and decrease power when link quality recovers, but its control basis is usually the current or most recent feedback received measurement value, and it directly regards the observed link quality changes as changes in the external propagation environment.

[0004] In actual equipment, the transmission power action, from its issuance to its complete appearance in the receiver's status report, involves processes such as power amplifier output stabilization, receiver measurement filtering, statistical window accumulation, status report generation, and feedback transmission. Therefore, within one or more control cycles, only a portion of the response from the previous power action may be reflected in the current received measurement. If the controller fails to distinguish between the already displayed and undisplayed responses from the previous power action, it may misjudge the state before reaching the target margin as continued external fading, leading to continuous power increases in the same direction. When the remaining responses from the previous action are fully displayed, it may result in excessive margin and trigger reverse power reduction, causing RF power to fluctuate or overcompensate.

[0005] Meanwhile, microwave links typically support adaptive modulation and coding schemes. Different modulation and coding schemes correspond to different receiver sensitivities and minimum demodulation signal-to-noise ratios. Directly comparing the received signal levels or signal-to-noise ratios under different modulation and coding schemes may misinterpret changes in the demodulation threshold as changes in the propagation environment. Furthermore, when the receiver's statistical window spans the power adjustment time or the modulation and coding scheme switching time, the statistical results simultaneously include the states before and after the action or the switching, further reducing the accuracy of link change judgment and power action response analysis. Summary of the Invention

[0006] To overcome the above-mentioned deficiencies of the prior art, the present invention provides a microwave communication radio frequency power adaptive control method and system based on link state awareness. By mapping the feedback report from the receiving end to its actual sampling and statistical time period, and processing reports that are repetitive, out of order, missing, or cross the power action or modulation coding scheme switching boundary, the link state data has consistent temporal semantics.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A link-state-aware adaptive control method for microwave communication radio frequency power includes:

[0009] Collect data on received signal quality, bit error rate, retransmission count, modulation and coding scheme, link fading rate, communication distance, operating temperature of radio frequency devices, and power adjustment records of microwave communication links. Time-align the data according to the data generation time and statistical window to construct a link status evolution sequence and identify short-term blockage, continuous fading, sudden interference, and link recovery status.

[0010] For power adjustment records still in the response period, based on the adjustment direction, adjustment magnitude, duration, and link response template matching the current modulation and coding scheme, communication distance range, and operating temperature range, determine the completed response quantity already reflected in the current link quality and the pending response quantity to be reflected in subsequent feedback cycles; remove the completed response quantity from the current link quality changes to obtain the exogenous link change quantity, and combine it with the pending response quantity to determine whether to suppress repeated power adjustment in the same direction;

[0011] Based on the link status, exogenous link changes, pending response quantities, link quality margin, and RF device thermal margin, the adjustment direction, adjustment magnitude, holding time, and power recovery slope during the link recovery phase of the RF power are jointly determined, and the power adjustment circuit is controlled to change the output power of the power amplifier within the allowable transmit power range of the equipment.

[0012] The link state evolution sequence is continuously updated during the specified retention period. After the link is identified as recovering, the output power is reduced in stages according to the specified power recovery slope. The link quality is verified after the corresponding response period ends in each stage. If the verification result does not meet the reliable communication conditions, the output power is restored to the previous stage. Otherwise, the process proceeds to the next stage until redundant power recovery is completed.

[0013] In a preferred embodiment, the received signal quality includes received level and signal-to-noise ratio (SNR); the link status reporting data generated by the receiver carries the sampling start and end times, modulation and coding scheme effective sequence number, and feedback sequence number. The reporting delay is determined based on the feedback sequence number, and all data are corrected to a unified observation time; according to the reliable decoding threshold corresponding to the current modulation and coding scheme, the received level and SNR are converted into a link quality margin under the same reference standard, and the link quality margin is corrected using the bit error rate, block error rate, and retransmission count within the corresponding statistical window; for statistical windows that span power adjustment times or modulation and coding scheme switching times, they are split into sub-windows with consistent states before being written into the link status evolution sequence.

[0014] In a preferred embodiment, the link response template is established as follows: A stable period is selected from the link state evolution sequence where the communication distance is within the same distance range, the modulation and coding scheme remains unchanged, and no external abnormal state is identified. The link quality margin change trajectory after a single power adjustment within the stable period is extracted until the link quality margin changes for at least three consecutive sampling periods are less than the response completion threshold. The change trajectories are grouped and time-aligned according to the power adjustment direction, adjustment amplitude range, modulation and coding scheme, communication distance range, and operating temperature range. The link response template is obtained by fusing the median trajectory of the change trajectories in the same group. The link response template at least records the response start delay, response duration, final state response quantity, and template confidence level. The cumulative response quantity corresponding to the current elapsed time is used as the completed response quantity, and the portion of the final state response quantity that has not yet formed a cumulative response is used as the response quantity to be completed.

[0015] In a preferred embodiment, the identification of the link state includes: identifying a short-term obstruction state when the received level and signal-to-noise ratio decrease synchronously, the bit error rate and retransmission count increase synchronously, the communication distance remains within the distance fluctuation range, and the link quality margin recovers within a first duration limit; identifying a continuous fading state when the received level and signal-to-noise ratio decrease synchronously, the link fading rate continuously points to link deterioration, and the duration exceeds the first duration limit; identifying a sudden interference state when the received level does not decrease or increases, but the signal-to-noise ratio decreases and the bit error rate and retransmission count increase; identifying a link recovery state when, after a short-term obstruction state, a continuous fading state, or a sudden interference state, the link quality margin continuously increases and the bit error rate and retransmission count decrease for multiple consecutive sampling periods; and prioritizing the processing of sudden interference state when multiple state conditions are met simultaneously within the same observation window.

[0016] In a preferred embodiment, different power adjustment methods are used for different link states: For short-term blockage, a limited power increase adjustment is performed, and the holding time is set to be no less than the remaining response time corresponding to the current pending response quantity; for continuous fading, the output power is increased in stages according to the exogenous link change quantity, and the next stage of power adjustment in the same direction can only be performed after the pending response quantity of the previous stage is reduced to the response release threshold; for sudden interference, a diagnostic power increase adjustment smaller than that for short-term blockage is performed first. After the corresponding response period ends, if the received level increases but the signal-to-noise ratio, bit error rate, and retransmission count do not improve, the diagnostic power increase adjustment is canceled, and the output power is prohibited from being increased further during the interference holding period; for link recovery, the current output power is maintained until the recovery confirmation period ends and redundant power recovery is initiated.

[0017] In a preferred embodiment, the thermal margin of the RF device is determined based on the current operating temperature, the temperature rise rate within the continuous sampling period, the proposed output power adjustment, and the proposed hold duration. When the proposed power adjustment and hold duration will cause the operating temperature of the RF device to exceed the temperature warning threshold, the modulation and coding scheme is first switched to an adjacent modulation and coding scheme with a lower modulation order and / or higher coding redundancy. After a new statistical window is formed, the link quality margin and the required adjustment range are re-determined. If the re-determined adjustment range still exceeds the thermal margin, the power increase is limited and the high-power hold duration is shortened. When the operating temperature reaches the temperature protection threshold, it is prohibited to continue increasing the output power.

[0018] In a preferred embodiment, the redundant power recovery includes: determining the target power for recovery based on the stable output power before the abnormal state occurred, the current communication distance, and the modulation and coding scheme; establishing a multi-level power recovery sequence between the current output power and the target power for recovery; as the link quality margin approaches the reliable communication threshold, sequentially reducing the power difference between adjacent power recovery levels; after each power reduction adjustment, waiting for the response period indicated by the link response template matching the power reduction adjustment to end; when the link quality margin remains above the recovery release threshold, the bit error rate and retransmission count do not increase continuously, and the exogenous link changes do not indicate link deterioration, proceeding to the next power recovery level; otherwise, restoring to the output power of the previous level, marking the output power of the previous level as the lowest stable power in the current state, and terminating this power recovery.

[0019] In a preferred embodiment, when the confidence level of the link response template matching the current modulation and coding scheme, communication distance range, and operating temperature range is lower than the template usage threshold, pairwise power probing is performed under the conditions that the link is in a stable state, the link quality margin is higher than the calibration margin, and the RF devices are not in a thermally limited state. The pairwise power probing includes reducing the output power by a probe step size not exceeding the calibration margin, restoring the output power by the same probe step size after the corresponding response period ends, and waiting for the response period to end again. The slow environmental drift during the probing is eliminated based on the link quality change trajectory during the power reduction and recovery processes, and the response start delay, response duration, final response quantity, and template confidence level of the corresponding link response template are updated. If the bit error rate or retransmission count exceeds the calibration abort threshold during the probing period, the output power before the probing is immediately restored and the update is stopped.

[0020] The present invention also provides a microwave communication radio frequency power adaptive control system based on link state awareness, comprising:

[0021] The link monitoring unit is located at the receiving end of the microwave communication link. It is used to collect the received signal quality, bit error status, retransmission count and modulation and coding scheme, and generate link status reporting data with sampling time and feedback sequence number.

[0022] A feedback interface is used to transmit the link status reporting data to the transmitter of the microwave communication link;

[0023] The status awareness unit is used to time-align the link status reported data with the communication distance, radio frequency device operating temperature and power adjustment records, construct the link status evolution sequence and identify the link status.

[0024] The response decomposition unit is used to store link response templates divided according to power adjustment direction, adjustment amplitude range, modulation and coding scheme, communication distance range and operating temperature range, and to determine the completed response amount and the response amount to be completed corresponding to the power adjustment record that is still in the response period.

[0025] The change attribution unit is used to remove the completed response from the current link quality changes to obtain the exogenous link change.

[0026] The control decision unit is used to generate power control commands, including adjustment direction, adjustment magnitude, hold duration and power recovery slope, based on link status, exogenous link changes, pending response quantities, link quality margin and RF device thermal margin.

[0027] The power execution unit, including a power regulation circuit and a power amplifier, is used to execute the power control command and recover redundant power based on the phased verification results after the link is restored.

[0028] The technical effects and advantages of the microwave communication RF power adaptive control method and system based on link state awareness are as follows: By mapping the receiver feedback report to its actual sampling and statistical time period, and processing reports that are repetitive, out of order, missing, or cross the power action or modulation and coding scheme switching boundary, the link state data has consistent temporal semantics; furthermore, a normalized link quality margin is constructed based on the receiver sensitivity and minimum demodulation signal-to-noise ratio corresponding to the current modulation and coding scheme, and corrections are made in conjunction with bit error, block error, and retransmission status, so that the link quality under different modulation and coding schemes can be compared on a uniform scale, reducing the interference of feedback delay and threshold changes on state judgment.

[0029] Based on stable single power action events, response templates are established according to power adjustment direction, adjustment amplitude, modulation and coding scheme, communication distance, and RF device temperature. The responses of past power actions at the current moment are divided into completed responses and incomplete responses. This allows for the description of the dynamic manifestation process of power actions in the receiving measurement and feedback link, avoiding the misinterpretation of incomplete power actions as new link deterioration.

[0030] By removing completed responses of past power actions from the current normalized link quality changes, we obtain the external link change quantity that represents the net impact of external factors such as blocking, fading, interference or recovery. We then use the incomplete responses to constrain subsequent control actions, thereby more accurately distinguishing between changes in the external environment and the control action's own response, and reducing continuous unidirectional power increase, overcompensation and power oscillation caused by feedback lag.

[0031] This invention combines analysis of received signal level, signal-to-noise ratio, bit error or block error status, retransmission strength, status duration, and external link change trends to identify short-term obstruction, continuous fading, sudden interference, and link recovery. Compared to control methods that only use a single received signal level threshold, it can improve the ability to distinguish between attenuation events, interference events, and recovery events, providing a basis for implementing differentiated RF power control.

[0032] For different link states, different strategies are adopted, including limited obstruction compensation, graded fading compensation, diagnostic interference verification, and phased power recovery. Specifically, under sudden interference conditions, small-scale diagnostic power increases are used to verify whether the signal-to-noise ratio and error states have been improved. If the power increase is ineffective, timely backoff and suppression of further power increases can reduce ineffective high-power operation under co-channel or adjacent-channel interference conditions. Under continuous fading conditions, the stability of the link protection process is improved by adjusting power step by step, waiting for response step by step, and re-evaluating step by step.

[0033] Based on link status, external link changes, incomplete responses, current link quality margin, and target margin, the power adjustment direction, adjustment magnitude, minimum hold time, and recovery slope are jointly determined, enabling power control to move beyond simple power increase / decrease judgments. After link recovery, by progressively reducing power, waiting for responses at each stage, verifying link quality at each stage, and backing down in case of instability, redundant power gained during the anomaly can be recovered while maintaining link reliability, reducing the average RF output and the long-term high-load operation time of the power amplifier.

[0034] Based on the current RF device temperature, temperature rise rate, candidate power change, and candidate hold duration, the system predicts the temperature at the end of the power action. When warning conditions are met, it prioritizes adjusting the modulation and coding scheme, limiting the power adjustment range, or shortening the hold duration. When protection conditions are met, it prohibits further power increase and implements power derating. This shifts thermal protection from a reactive, post-action approach to a power decision-making stage, achieving coordinated control between link reliability, transmit power, and RF device thermal safety.

[0035] After the power action is executed, the actual output power is verified, and the execution result is associated with the corresponding link status, response template, and backoff power. This can avoid attributing the execution abnormality of the power regulation circuit or power amplifier to changes in the propagation environment, thereby improving the diagnostics and engineering reliability of the control closed loop.

[0036] When the link margin, device temperature, and service status meet safety conditions, a pair of power probes with opposite amplitudes are used to obtain the response trajectory. The power action response is extracted by the symmetrical change of the two response trajectories, and environmental drift is suppressed by the common change trend. Based on this, the response start delay, response duration, steady-state response quantity, and template confidence are updated, so that the response template can adapt to equipment aging, temperature characteristic changes, RF component replacement, and feedback path delay changes, ensuring the long-term effectiveness of the adaptive control strategy. Attached Figure Description

[0037] Figure 1 This is a flowchart of the microwave communication radio frequency power adaptive control method based on link state awareness according to the present invention.

[0038] Figure 2 This is a time-aligned timing diagram of the power adjustment time, receiver sampling window, modulation and coding scheme switching time, and feedback report arrival time of the present invention.

[0039] Figure 3 This is a decomposition timing diagram of the completed and incomplete responses of the previous radio frequency power operation of the present invention;

[0040] Figure 4 This is a flowchart illustrating the state identification and differentiated power control for short-term occlusion, continuous fading, sudden interference, and link recovery in this invention. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] Please see Figures 1-4 This invention provides a technical solution for a microwave communication radio frequency power adaptive control method and system based on link state awareness:

[0043] Example 1: Adaptive Radio Frequency Power Control Method

[0044] This embodiment is applied to a point-to-point microwave communication link. The first end of the link is equipped with an RF transmitter, a power amplifier, a power regulation circuit, a processor, and a temperature sensor; the second end is equipped with a receiver, which feeds back the received measurement results to the first end through the link management channel or the control field in the service frame. The first end executes the following steps S1 to S6.

[0045] As an illustrative configuration, the link operates at... Frequency band, channel bandwidth is RF output power can to Between Resolution adjustment. The receiver uses... To form a base sample for the sampling period, This generates a status report for the statistical period. The above configuration is not a necessary limitation; if the device supports it, a shorter sampling period or event-triggered reporting can also be used.

[0046] Step S1: Acquire data, align the data in time, and generate a link state evolution sequence.

[0047] S11: Acquire raw state variables. The receiver acquires the received signal level, signal-to-noise ratio, bit error rate, block error rate, retransmission count, modulation and coding scheme, and its effective period. The transmitter acquires the link distance, RF device temperature, current output power, and records of all power actions. Each power action record includes at least the action identifier, action start time, power before adjustment, power after adjustment, adjustment direction, and adjustment magnitude. For bidirectional links, state variables and action records can be maintained separately for each transmission direction, avoiding the direct use of reverse link measurements for forward link power control.

[0048] The received signal level characterizes the total radio frequency energy reaching the receiver input, while the signal-to-noise ratio (SNR) characterizes the demodulation capability of the desired signal relative to noise and interference. When used together, they can distinguish between attenuation events where "signal power and SNR decrease simultaneously" and interference events where "the received signal level remains essentially unchanged or increases, but the SNR decreases."

[0049] S12: Establish a timeline for feedback reports. Each receiver feedback report carries the sample start time. End time of sample The report includes the sequence number, modulation and coding scheme activation sequence, and received measurement value. The transmitter records the report arrival time. When the transmitting and receiving ends use different local clocks, the offset of the receiving clock relative to the transmitting clock is estimated through periodic clock calibration messages. Then the feedback delay can be expressed as

[0050]

[0051] Instead of directly concatenating status data according to the order in which reports arrive, the processor maps the reports back to their actual statistical periods. The report sequence number is used to identify lost, duplicate, and out-of-order reports. For out-of-order reports that are still within the retention window, they are re-inserted according to the statistical period; for duplicate reports, only the one that passes verification is retained; for missing reports, a blank mark is retained, and link changes are not fabricated by simply copying previous values.

[0052] S13: Calculate the link quality margin normalized to the modulation and coding scheme. Different modulation and coding schemes correspond to different receiver sensitivities and minimum demodulated signal-to-noise ratios. Directly comparing the received signal levels or signal-to-noise ratios under different modulation and coding schemes can easily lead to misinterpreting the threshold changes caused by switching modulation and coding schemes as changes in the propagation environment. Therefore, the processor reads the current modulation and coding scheme from the device calibration table. Corresponding receiving sensitivity Demodulation signal-to-noise ratio threshold Based on the current received signal level With signal-to-noise ratio Calculate the basic margin

[0053]

[0054] Among these, the smaller of the two margin values ​​is selected to ensure that the result reflects a constraint in the current demodulation link that is closer to failure. Then, the block error rate is used... and retransmission intensity within a unit statistical period Confidence correction for the basic margin:

[0055]

[0056] in, and These are correction factors determined through equipment commissioning or historical operating data. This is the normalized link quality margin. If the device can only provide the bit error rate but not the block error rate, the equivalent block error penalty can be obtained by segmenting and mapping the bit error rate; if both bit error rate and block error rate are provided, the block error rate, which is directly related to the link retransmission mechanism, should be used first.

[0057] For example, when the current modulation and coding scheme is 16QAM3 / 4, the calibration table gives the following receiver sensitivity: The lowest demodulation signal-to-noise ratio is When measured , At that time, the two basic margins are respectively and ,therefore If the total of the erroneous block and retransmission correction is Then the normalized link quality margin is .

[0058] S14: Splitting Cross-Boundary Statistical Windows. The processor checks whether each received statistical window spans an RF power action time or a modulation / coding scheme switching time. If a span exists, the statistical window is split into a pre-action sub-window and a post-action sub-window, or a pre-switching sub-window and a post-switching sub-window, using the base sample according to the boundary, and the state variables are calculated separately. Mixed windows that cannot be split are marked as "boundary mixed samples," which can be used for security alarms but not for response template extraction and external factor change estimation.

[0059] For example, a report covers to The transmission power is Depend on Adjusted to The processor splits the base sample into... to Pre-action data and to Post-action data. Therefore, the improvement in reception after an action is not diluted across the pre-action period.

[0060] S15: Forming a state evolution sequence. The processor arranges the state records according to a unified timeline. Each state record includes at least: statistical time period, received signal level, signal-to-noise ratio (SNR), normalized link quality margin, bit error or block error state, retransmission intensity, modulation and coding scheme, link distance, RF device temperature, temperature rise rate, current transmit power, effective power action indicator, and data reliability marker. The processor calculates the short-time rate of change, medium-time duration, the co-directionality of received signal level and SNR, and the direction of error state change for the state evolution sequence, providing input for subsequent link state identification.

[0061] Link distance can be obtained from installation configuration, device ranging, or network management data. For fixed microwave links, the distance typically remains constant over a long period, so sudden changes in distance are mainly used to detect configuration errors or link reconstruction. For mobile microwave nodes, distance changes are used to select the appropriate propagation loss range and response template index.

[0062] Step S2: Build a response template and decompose the response of previous power actions.

[0063] S21: Filtering Stable Single-Action Events. The processor selects sample events from the historical state evolution sequence to construct the response template. A sample event meets the following criteria: within a preset stable period before the power action, the link quality margin fluctuation is less than the stable threshold; only one valid power action exists within the response observation period; the modulation and coding scheme, distance range, and temperature range do not change across regions; and no obstruction alarms, strong interference alarms, or feedback data interruptions occur. Through the above filtering, the contamination of the power response template by external propagation changes is reduced.

[0064] S22: Construct the grouped response trajectory. For the first... A stable single-action event, with a baseline margin before the action. Using zero as the starting point, construct the residual response trajectory after the action.

[0065]

[0066] in, For the moment of power operation, This represents the elapsed time after the action. The processor groups events according to adjustment direction, adjustment amplitude range, modulation and coding scheme, distance range, and RF device temperature range, and calculates the median or truncated mean of the trajectories in the same group at the same elapsed time position to obtain the response template for that group. Using the median or truncated mean can reduce the impact of a small number of abnormally fading samples on the template.

[0067] Each response template records at least the response start delay, the duration of the main response, the steady-state response quantity, and the template confidence level. The response start delay is the time from the power transmission action to the point where the response can be stably observed at the receiver; the duration of the main response is the time required for the response to reach a preset proportion of the steady-state response quantity from the initial position; the template confidence level is determined by the number of valid samples, the intra-group trajectory dispersion, and the most recent update time.

[0068] S23: Determine which responses have been completed and which have not. For the first response that is still within the observation period at the current moment... Each effective power action is determined by its direction, amplitude, modulation coding method, distance range, temperature range, and elapsed time. Select a response template. The completed response for this action at the current moment is...

[0069]

[0070] Its incomplete response is

[0071]

[0072] in, This represents the steady-state response of the template. For power actions that have exceeded the duration of the primary response and whose margin observation results are stable, the incomplete response is set to zero and the active state of the action is terminated; for multiple power actions with overlapping response times, the completed and incomplete responses of each action are calculated separately and superimposed during external factor estimation.

[0073] For example, a template indicates that power increases. Later It begins to appear on the feedback side, approximately To achieve stability, the steady-state margin is improved to After the action The template has been displayed in response. The response has been completed. The response was incomplete. Even if the current link capacity has not yet reached the target, it will not be increased immediately. Instead, it combines the amount of incomplete responses and the remaining response time to decide whether to continue.

[0074] S24: Handling Low-Confidence Templates. When the number of valid samples for the corresponding group is less than the minimum, or the template dispersion exceeds the allowable range, the processor marks the template as low-confidence. In this case, incomplete responses are only used as a reference to suppress repeated adjustments, not as a basis for relaxing safety margins; if the link quality continues to deteriorate to the protection threshold, limited safety power actions are allowed. This processing ensures that insufficient templates do not delay link protection due to over-reliance on prediction.

[0075] Step S3: Estimate external link changes and identify link status

[0076] S31: Calculate the change in external link factors. Use the stable link quality margin before the start of the current analysis interval as a baseline. Subtracting the completed responses of each effective power action from the current margin change, we obtain...

[0077]

[0078] when When the value is negative and its absolute value continues to increase, it indicates that the link still suffers from net degradation caused by the propagation environment or interference; when When the response is close to zero but not yet completed, it indicates that the current margin is still low, possibly mainly because previous power-up actions have not yet fully manifested; when When a negative value continues to rise, it indicates that the external event is subsiding.

[0079] The above calculations are performed on the same normalized residual scale as the template. For actions with low template confidence, completed responses can be multiplied by a confidence weight of less than one to avoid subtracting all unvalidated predictions from observed changes.

[0080] S32: Identify Short-Term Obstruction. When the received signal level and signal-to-noise ratio decrease synchronously during the first discrimination period, the block error rate or retransmission intensity increases, the link distance remains stable, and the above indicators begin to recover within the first duration, the link status is identified as short-term obstruction. The first discrimination period can be two to five statistical cycles, and the first duration can be set based on the on-site statistical results of obstruction by vehicles, personnel, or swaying objects.

[0081] S33: Identify Continuous Fading. When the received signal level and signal-to-noise ratio decrease synchronously, the block error rate or retransmission intensity increases, and the external link change remains negative or continues to decrease after exceeding the first duration, the link state is identified as continuous fading. Continuous fading can correspond to rainfall attenuation, multipath degradation, slow antenna orientation shift, or prolonged blockage.

[0082] S34: Identify sudden interference. When the received signal level remains within the stable band or increases slightly, while the signal-to-noise ratio decreases, the block error rate increases, or the retransmission intensity increases, the link state is identified as sudden interference. If both attenuation and interference characteristics are met, the interference state is prioritized. First, verify whether increasing power can improve the signal-to-noise ratio and error state, avoiding ineffective increases in transmit power under strong interference on the same frequency.

[0083] S35: Identify Link Recovery. When the external link change rate rises for several consecutive statistical periods, the normalized link quality margin increases, the block error rate and retransmission intensity decrease, and at least one of the received signal level and signal-to-noise ratio recovers to the pre-event stable band, the link state is identified as link recovery. To prevent the state from repeatedly switching near the boundary, the recovery state only takes effect after the recovery confirmation time is met; if the state deteriorates again during the confirmation period, it returns to the previous abnormal state.

[0084] Link state determination is not based on a single threshold comparison, but rather on judging the joint direction, duration, unidirectionality, and external changes of state variables. An illustrative set of criteria is shown in Table 1.

[0085] Table 1 shows the set of link state criteria.

[0086] state Received volume characteristics Errors and persistent characteristics control meaning Short-term occlusion The received signal level and signal-to-noise ratio decreased rapidly in sync. Errors increased but recovered within the first duration. Limiting compensation and keeping an eye on it Continued decline The received signal level and signal-to-noise ratio decreased simultaneously. External factors remain negative, and errors persist or increase. Increase power in stages, and reduce modulation and coding scheme when necessary. sudden interference When the received signal level stabilizes or increases, the signal-to-noise ratio decreases. Increased errors and retransmissions Small-scale diagnostic adjustment; if ineffective, regress and inhibit further power increase. Link recovery Balance and changes in external factors rebound Errors and retransmissions decrease and acknowledgment duration is met. Phased recovery of redundant power

[0087] Step S4: Jointly determine the power direction, amplitude, duration of hold, and recovery slope.

[0088] S41: Determine basic control variables. Based on the identified link status, external link changes, incomplete responses, current link quality margin, and target margin, the processor determines the power adjustment direction and candidate adjustment magnitude. The candidate adjustment magnitude is constrained by the device's power resolution, maximum output power, frequency band regulatory restrictions, power amplifier linearity range, and link service level.

[0089] If the incomplete response is in the same direction as the intended action, the processor prioritizes extending the hold duration or deducting the expected margin that the incomplete response can cover from the candidate range. Only when the external link change continues to deteriorate significantly, the current margin reaches the emergency protection threshold, or the error state increases rapidly, is it allowed to execute a restricted power action in the same direction again before the previous response is completed. Thus, the system simultaneously takes into account the requirements of link protection speed and avoiding duplicate compensation.

[0090] S42: Short-term obstruction control. For short-term obstruction, perform a power increase action not exceeding the obstruction compensation limit, and set the hold duration to be no less than the remaining main response time of the current effective action. During the hold period, unless the link enters the emergency failure zone, no repeated unidirectional adjustment is performed. If the link recovers within the first duration, proceed to step S5; if it does not recover, transition to continuous fading and recalculate the control quantity.

[0091] S43: Persistent Fading Control. For persistent fading, the required power increment is decomposed into multiple levels. After each level of increment, at least the main response duration of the corresponding response template is waited before determining the next level based on the updated external link changes. If the external factors worsen further during the waiting period, an emergency small increment is allowed to be executed ahead of schedule; if the incomplete response is sufficient to cover the target margin gap, the current power is maintained and the next level is not executed.

[0092] S44: Sudden Interference Control. For sudden interference, a diagnostic power increase action with an amplitude smaller than the normal fading compensation amplitude is first executed. After the main response appears, the received signal level, signal-to-noise ratio (SNR), and error state are compared: if the received signal level increases with the transmit power, but the SNR and error state do not improve, it is confirmed that the power increase action cannot effectively cancel the current interference, and the power is immediately reverted to the pre-action power. Continued power increase in the same direction is prohibited during the interference hold-off period; simultaneously, channel switching, spectrum avoidance, modulation / coding scheme reduction, or maintenance alarms may be triggered. If the SNR and error state improve synchronously, the event is treated as a mixed state that can be compensated by power.

[0093] S45: Calculate thermal margin and apply thermal constraints. The processor calculates the thermal margin based on the current RF device temperature. Recent rate of temperature rise Candidate power change Duration of time with candidates Estimate the temperature at the end of the hold:

[0094]

[0095] in, This is the calibration factor for the additional temperature rise per unit time caused by changes in RF power. This formula is a linear approximation for ease of explanation; actual devices can use a piecewise linear model, a thermal resistance / capacity model, or a lookup table model.

[0096] When the predicted temperature is higher than the warning temperature but lower than the protection temperature, the processor prioritizes reducing the modulation and coding scheme by one level and recalculates the link quality margin according to the reduced demodulation threshold. If power still needs to be increased, the adjustment range is limited or the hold-off time is shortened. When the current temperature reaches the protection temperature, or the predicted temperature exceeds the protection limit, further power increases are prohibited, and power derating or link protection operations are triggered.

[0097] For example, the current device temperature is The combined expected additional temperature rise due to the recent rate of temperature rise and the candidate power action is: The predicted temperature is If the warning temperature is set to... , protection temperature set to Instead of directly performing a large power increase, the processor first tries to reduce the modulation and coding scheme and recalculate the margin.

[0098] S46: Determine the recovery slope. The recovery slope is used to constrain the allowable reduction in RF power per unit time after link recovery. The processor determines the recovery slope based on the stability of the recovery state, the extent to which the current margin exceeds the target margin, the template response time, and the error state. A smaller power reduction step size and a longer verification time are used in the initial recovery phase; the descent rate can be appropriately increased after link stability is confirmed; the step size is reduced again when approaching the minimum stable power to avoid crossing the stability boundary.

[0099] The final control command includes at least the target output power, direction of action, amplitude of action, minimum hold time, recovery slope, reason for action, associated status flag, and fallback power. This control command is written to the power action record so that step S2 can continue to track its completed and incomplete responses.

[0100] Step S5: Perform power actions and recover redundant power in stages.

[0101] S51: Execution and Verification. The power regulation circuit sets the gain, attenuator level, or digital predistortion power target of the power amplifier according to the control command. After execution, the processor reads the local power detection value to confirm that the actual output power is within the target tolerance range; if the execution fails or the detection value is abnormal, the action is canceled and a device fault alarm is generated to avoid attributing hardware execution failure errors to the propagation environment.

[0102] S52: Determine the recovery target. After the link enters the recovery state and meets the recovery confirmation time, the processor determines the recovery target based on the stable output power before the abnormal event, the current link distance, the current modulation and coding scheme, the historical record of the lowest stable power, and the required target margin. For fixed links, the stable power before the event under the same modulation and coding scheme and similar temperature conditions is preferred; for links where the distance or modulation and coding scheme has changed, the recovery target is selected from the lowest stable power record of the matching interval.

[0103] S53: Generate a phased power reduction sequence. The processor divides the difference between the current power and the recovery target into multiple reduction steps. A larger step size can be used when the target is far away, and a smaller step size is used when the target is approached or the current margin is close to the safety threshold. After each step, wait for the main response time of the corresponding power reduction response template, and verify the normalized link quality margin, block error rate, retransmission strength, and external link changes.

[0104] For example, during an abnormal period, the output power is... Increase to The recovery target is The processor can generate The sequence is divided into stages. Each step executes and then waits for a corresponding response to appear. If in If the link quality margin is close to the safety threshold, then the final step will be reduced to... Or stop decreasing, instead of mechanically returning to the starting position all at once. .

[0105] S54: Verification and Rollback. If, after a power reduction, the normalized link quality margin falls below the recovery safety threshold, the block error rate or retransmission strength exceeds the recovery threshold, or the external link change becomes significantly negative again, the processor rolls back to the power level before the action and records the rolled-back power as the lowest stable power candidate under the current conditions. Only after subsequent sustained stability reaches the record confirmation duration will it be written into the lowest stable power table.

[0106] By progressively reducing, waiting, and verifying power at each stage, redundant power added during anomalies can be recovered in a timely manner, while preventing rapid power reduction from causing link instability again. The recovery process also reduces the average output, junction temperature, and long-term high-load time of the power amplifier.

[0107] Step S6: Online calibration of low-confidence response template

[0108] S61: Determine the detection conditions. Paired power detection is allowed when the confidence level of a template group is lower than the calibration threshold, the link is in a stable state, the normalized link quality margin is higher than the detection safety margin, the RF device temperature is lower than the detection temperature limit, and there are currently no high-priority service protection flags. If any condition is not met, detection is postponed, and the current link security is not sacrificed for model calibration.

[0109] S62: Perform pairwise detection. The processor first performs a small power reduction operation. Wait for the corresponding response, observe the duration, and record the trajectory of the first response; then restore the same amplitude. Then wait again and record the second response trajectory. The step size is smaller than the conventional control step size, and the expected margin is not lower than the detection safety threshold.

[0110] S63: Remove environmental drift and update the template. If the slow drift of the external environment between two detection phases is approximately continuous, the power action response can be estimated using the symmetric components of two response trajectories in opposite directions, and the environmental drift can be estimated using the common trend component. The processor adds the drift-removed trajectory to the corresponding template group and updates the median trajectory, response start delay, main response duration, steady-state response magnitude, and confidence level of the template based on the deviation between the new sample and the original template.

[0111] If the error rate, retransmission intensity, or temperature reaches the abort threshold during the detection process, the processor immediately terminates the detection and restores the stable power before detection; this aborted sample is not used for template updates. Therefore, the template can continuously adapt after equipment aging, changes in temperature characteristics, or changes in feedback path delay, while ensuring the controllability of online calibration.

[0112] Example 2

[0113] This embodiment illustrates the operation of the above method in a series of events. The link distance is... The initial modulation and coding scheme is 16QAM3 / 4, and the initial output power is... Before the event, the normalized link quality margin was stable at... The temperature of the radio frequency device is approximately [temperature value missing]. The equipment contains information related to "addition". 16QAM3 / 4, Distance to ,temperature to The corresponding response template shows that the response start delay is approximately... The main response duration is approximately The steady-state margin improvement is approximately .

[0114] At any moment The received signal level and signal-to-noise ratio drop rapidly, while the block error rate and retransmission intensity increase, and the distance remains unchanged. Based on the joint characteristics of the first three statistical cycles, the processor identifies this event as a short-term blockage. At this point, the margin is close to the protection threshold, and the processor issues an increase... The power command will change the output power from Adjusted to And set the minimum hold duration to be no less than the main response duration of the template.

[0115] After the action The received feedback only shows approximately Improvements. According to the template, there are still approximately... The incomplete response. Traditional threshold control might increase power again if the current margin is still low; this embodiment determines that the previous action has not been completed and discards it. The external factors that had already responded did not continue to deteriorate rapidly, therefore they remained unchanged. And wait, without performing a second power increase in the same direction.

[0116] After the action The power response is largely complete, but the external link change remains negative, the received signal level and signal-to-noise ratio have not recovered, and the error state persists. Based on this, the processor transitions the state from short-term blocking to continuous fading. According to the current margin gap, thermal margin, and maximum linear output limit, the processor executes another... The incremental steps adjust the output power to Continue to wait and verify according to the corresponding template.

[0117] Subsequently, the external obstruction disappeared, and the external link variation gradually increased. The received signal level and signal-to-noise ratio returned to the pre-event stable band, and the block error rate and retransmission intensity decreased. The processor enters the link recovery state after satisfying the recovery confirmation time. At this time, the output power is not switched from... One fall Instead, it generates The recovery sequence is as follows. After each descent, the duration of the main response corresponding to the power reduction response template is waited for, and the link quality margin and error status are verified.

[0118] If in Down to If the margin falls below the recovery safety threshold and the retransmission intensity increases significantly, the processor will immediately revert to the previous state. and put This power serves as the lowest stable power candidate under the current distance, modulation and coding scheme, and temperature conditions. After stability confirmation, this power is written into the lowest stable power table for use in the next recovery target determination.

[0119] This process demonstrates that the present invention does not simply perform threshold-based power increases and decreases based on the current received level, but rather separates external link events from the responses of previous control actions that are still propagating; it suppresses redundant compensation during anomalies and recovers redundant power step by step during recovery, thereby balancing link availability, control stability, and RF device thermal load.

[0120] Example 3

[0121] This embodiment provides a microwave communication RF power adaptive control system based on link state awareness. The system includes a link monitoring module, a feedback processing module, a state awareness module, a response decomposition module, a change attribution module, a control decision module, and a power execution module. Each module can be implemented by independent hardware or by a processor executing program instructions from memory; multiple modules can be deployed together, or the same module can be distributed at both the transmitting and receiving ends.

[0122] The link monitoring module is used to acquire received signal level, signal-to-noise ratio, bit error or block error status, retransmission count, modulation and coding scheme, fading rate, link distance, RF device temperature, temperature rise rate, and RF output power. This module also generates basic measurement records with statistical time periods and validity markers.

[0123] The feedback processing module is used to obtain the report sequence number, sample start and end times, modulation and coding scheme effective sequence, and report arrival time; estimate the clock offset and feedback delay at both ends of the receiver and transmitter; time-align the feedback reports according to the measurement generation period rather than the arrival order; identify lost, duplicate, and out-of-order reports; split the statistical window that crosses the power action or modulation and coding scheme switching boundary; and calculate the normalized link quality margin based on the receiver sensitivity and demodulation signal-to-noise ratio threshold of the corresponding modulation and coding scheme.

[0124] The state-aware module is used to extract the joint change direction of received signal level and signal-to-noise ratio, error state changes, duration, and recovery trend based on the time-aligned state evolution sequence, and to identify short-term obstruction, continuous fading, sudden interference, and link recovery states. The state-aware module is also used to perform state priority selection and hysteresis acknowledgment when multiple criteria are simultaneously met.

[0125] The response decomposition module maintains response templates indexed by adjustment direction, adjustment amplitude, modulation coding scheme, distance range, and temperature range. For each effective power action, it determines completed and incomplete responses based on the elapsed time after the action. It also outputs the template confidence level based on the number and dispersion of template samples. Under safe conditions, this module can also perform paired power probing, using response trajectories with opposite directions to eliminate environmental drift and update the templates.

[0126] The change attribution module is used to subtract the completed responses of each effective power action from the change in the current normalized link quality margin relative to the stable baseline, thereby obtaining the external link change amount; and combines it with the incomplete responses to determine whether the current quality deficiency is mainly due to the continued deterioration of the external environment or because the previous power actions have not yet fully manifested. The output of this module is used by both the state awareness module and the control decision module.

[0127] The control decision module is used to jointly determine the power adjustment direction, adjustment magnitude, minimum hold duration, and recovery slope based on link status, external link changes, incomplete responses, current link quality margin, and thermal margin. The control decision module performs amplitude limiting compensation for short-term blockages, graded compensation for persistent fading, diagnostic small-step adjustments and ineffective backoffs for sudden interferences, and generates a phased power recovery sequence after link recovery.

[0128] The control decision module is also used to predict device temperature based on current temperature, temperature rise rate, candidate power, and holding time; when the warning condition is reached, the modulation coding method is reduced first and the margin is recalculated; when the protection condition is reached, the power is prohibited from being increased further.

[0129] The power execution module converts the target output power into a power amplifier gain, a variable attenuator setting, or a digital predistortion power target, executes control commands, and reads power detection feedback. It also restores the power to the corresponding fallback power when diagnostic power increase fails, phased power reduction causes link instability, or hardware malfunctions. The result of each action is written to the power action record and fed back to the response decomposition module to form a closed loop.

[0130] The data relationships between the above modules are as follows: the link monitoring module and the feedback processing module form a state evolution sequence on a unified time axis; the response decomposition module outputs the completed and incomplete responses of past actions; the change attribution module outputs the external link change amount; the state perception module outputs the event type; the control decision module integrates the above information to generate control commands; and the power execution module executes the commands and returns the new actions and execution results to the state evolution sequence. This forms a closed-loop control process of "observation-decomposition-attribution-decision-execution-re-observation".

[0131] Example 4

[0132] This embodiment provides a microwave communication device, including an RF transceiver assembly, a power amplifier, a power regulation circuit, a temperature sensor, a processor, a memory, and a communication bus. The RF transceiver assembly is used to transmit and receive microwave signals; the power amplifier is used to amplify the power of the RF signal to be transmitted; the power regulation circuit is used to change the gain or output target of the power amplifier; the temperature sensor is disposed at the power amplifier, the RF front end, or a location thermally coupled thereto, and is used to detect the temperature of the RF devices.

[0133] The memory stores the computer program, modulation and coding scheme threshold table, response template library, minimum stable power table, thermal model parameters, and device power limit parameters. When the processor executes the computer program, steps S1 to S6 as described in Embodiment 1 are performed.

[0134] In one implementation, the receiver's digital baseband chip calculates the received signal level, signal-to-noise ratio, block error rate, and retransmission count, and generates a timestamped link status report. The transmitter's processor performs feedback alignment, margin normalization, response decomposition, external factor estimation, state identification, and power decision-making. The power adjustment circuit consists of a digital variable attenuator and a power amplifier bias control circuit. After each setting, the processor reads the detection values ​​from the directional coupler and power detector to verify the actual output power.

[0135] In another implementation, processors are deployed at both the transmitting and receiving ends, each performing local measurement preprocessing. The transmitting end only receives normalized status records and statistical time periods; the response templates and control logic remain at the transmitting end. For networked microwave systems, a centralized controller can also maintain response templates and power strategies for multiple links, but each link separately stores effective power actions, template indices, thermal states, and minimum stable power records to avoid data mixing between different hardware and propagation paths.

[0136] When the processor, memory, or control software malfunctions, the device enters a safety degradation mode: online template updates are stopped, timed-out incomplete response markers are cleared, and the link is maintained using a certified fixed power limit and conservative modulation coding scheme; if the temperature reaches the hardware protection value, a hardware protection circuit independent of the software control loop performs power derating or shutdown. This safety mechanism does not change the state awareness and response decomposition control logic during normal operation of this invention.

[0137] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0138] In addition, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0139] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0140] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A microwave communication radio frequency power adaptive control method based on link state awareness, characterized in that, include: Collect data on received signal quality, bit error rate, retransmission count, modulation and coding scheme, link fading rate, communication distance, operating temperature of radio frequency devices, and power adjustment records of microwave communication links. Time-align the data according to the data generation time and statistical window to construct a link status evolution sequence and identify short-term blockage, continuous fading, sudden interference, and link recovery status. For power adjustment records still in the response period, based on the adjustment direction, adjustment magnitude, duration, and link response template matching the current modulation and coding scheme, communication distance range, and operating temperature range, determine the completed response quantity already reflected in the current link quality and the pending response quantity to be reflected in subsequent feedback cycles; remove the completed response quantity from the current link quality changes to obtain the exogenous link change quantity, and combine it with the pending response quantity to determine whether to suppress repeated power adjustment in the same direction; Based on the link status, exogenous link changes, pending response quantities, link quality margin, and RF device thermal margin, the adjustment direction, adjustment magnitude, holding time, and power recovery slope during the link recovery phase of the RF power are jointly determined, and the power adjustment circuit is controlled to change the output power of the power amplifier within the allowable transmit power range of the equipment. The link state evolution sequence is continuously updated during the specified retention period. After the link is identified as recovering, the output power is reduced in stages according to the specified power recovery slope. The link quality is verified after the corresponding response period ends in each stage. If the verification result does not meet the reliable communication conditions, the output power is restored to the previous stage. Otherwise, the process proceeds to the next stage until redundant power recovery is completed.

2. The microwave communication RF power adaptive control method based on link state awareness according to claim 1, characterized in that, The received signal quality includes the received level and signal-to-noise ratio (SNR). The link status reporting data generated by the receiver carries the sampling start and end times, the modulation and coding scheme effective sequence number, and the feedback sequence number. The reporting delay is determined based on the feedback sequence number, and all data are corrected to a unified observation time. According to the reliable decoding threshold corresponding to the current modulation and coding scheme, the received level and SNR are converted into a link quality margin under the same reference standard, and the link quality margin is corrected using the bit error rate, block error rate, and retransmission count within the corresponding statistical window. For statistical windows that span power adjustment times or modulation and coding scheme switching times, they are split into sub-windows with consistent states before being written into the link status evolution sequence.

3. The microwave communication RF power adaptive control method based on link state awareness according to claim 2, characterized in that, The link response template is established as follows: A stable period is selected from the link state evolution sequence where the communication distance is within the same range, the modulation and coding scheme remains unchanged, and no external abnormalities are identified. The link quality margin change trajectory after a single power adjustment within the stable period is extracted until the link quality margin changes for at least three consecutive sampling periods are less than the response completion threshold. The change trajectories are grouped and time-aligned according to the power adjustment direction, adjustment amplitude range, modulation and coding scheme, communication distance range, and operating temperature range. The link response template is obtained by fusing the median trajectory of the same group of change trajectories. The link response template records at least the response start delay, response duration, final state response quantity, and template confidence level. The cumulative response quantity corresponding to the current elapsed time is used as the completed response quantity, and the portion of the final state response quantity that has not yet formed a cumulative response is used as the response quantity to be completed.

4. The microwave communication radio frequency power adaptive control method based on link state awareness according to claim 3, characterized in that, The identification of the link status includes: When the received level and signal-to-noise ratio decrease synchronously, the bit error rate and retransmission count increase synchronously, the communication distance remains within the range of distance fluctuation, and the link quality margin recovers within the first duration, it is identified as a short-term blockage state. When the received level and signal-to-noise ratio decrease synchronously, the link fading rate continues to indicate link deterioration, and the duration exceeds the first duration limit, it is identified as a continuous fading state. When the received signal level does not decrease or increase, but the signal-to-noise ratio decreases and the bit error rate and retransmission count increase, it is identified as a sudden interference state. After a short-term obstruction state, a continuous fading state, or a sudden interference state, if the link quality margin continues to increase and the bit error rate and retransmission count decrease for multiple consecutive sampling periods, it is identified as a link recovery state; when multiple state conditions are met simultaneously in the same observation window, it is treated as a sudden interference state first.

5. The microwave communication RF power adaptive control method based on link state awareness according to claim 4, characterized in that, Different power adjustment methods are used for different link states: For short-term occlusion, perform a limited power adjustment and set the duration to be no less than the remaining response time corresponding to the current pending response quantity. For continuous fading, the output power is increased in stages according to the changes in the exogenous link. The next stage of power adjustment in the same direction can only be executed after the amount of the response to be completed in the previous stage is reduced to the response release threshold. In the event of sudden interference, a diagnostic power increase adjustment smaller than the adjustment range for short-term blockage is first performed. After the corresponding response period ends, if the received level increases but the signal-to-noise ratio, bit error rate, and number of retransmissions do not improve, the diagnostic power increase adjustment is cancelled, and the output power is prohibited from being increased further during the interference holding period. For links in a recovered state, maintain the current output power until the recovery confirmation period ends and redundant power reclamation is initiated.

6. The microwave communication RF power adaptive control method based on link state awareness according to claim 5, characterized in that, The thermal margin of the RF device is determined based on the current operating temperature, the rate of temperature rise during the continuous sampling period, the proposed output power adjustment, and the proposed hold duration. When the proposed power adjustment and hold duration will cause the operating temperature of the RF device to exceed the temperature warning threshold, the modulation and coding scheme is first switched to an adjacent modulation and coding scheme with a lower modulation order and / or higher coding redundancy. After a new statistical window is formed, the link quality margin and the required adjustment range are re-determined. If the re-determined adjustment range still exceeds the thermal margin, the power increase is limited and the high-power hold duration is shortened. When the operating temperature reaches the temperature protection threshold, it is prohibited to continue increasing the output power.

7. The microwave communication radio frequency power adaptive control method based on link state awareness according to claim 6, characterized in that, The redundant power recovery includes: determining the target power for recovery based on the stable output power before the abnormal state occurred, the current communication distance, and the modulation and coding scheme; establishing a multi-level power recovery sequence between the current output power and the target power; as the link quality margin approaches the reliable communication threshold, the power difference between adjacent power recovery levels is reduced sequentially; after each power reduction adjustment, the response period indicated by the link response template matching the power reduction adjustment is waited for to end; when the link quality margin remains above the recovery release threshold, the bit error rate and retransmission count do not increase continuously, and the exogenous link changes do not indicate link deterioration, the next power recovery level is entered; otherwise, the output power of the previous level is restored, the output power of the previous level is marked as the lowest stable power under the current state, and the current power recovery is terminated.

8. The microwave communication radio frequency power adaptive control method based on link state awareness according to claim 7, characterized in that, When the confidence level of the link response template matching the current modulation and coding scheme, communication distance range, and operating temperature range is lower than the template usage threshold, pairwise power probing is performed under the conditions that the link is in a stable state, the link quality margin is higher than the calibration margin, and the RF devices are not in a thermally limited state. The pairwise power probing includes reducing the output power by a probe step size not exceeding the calibration margin, restoring the output power by the same probe step size after the corresponding response period ends, and waiting for the response period to end again. The slow environmental drift during the probing is eliminated based on the link quality change trajectory during the power reduction and recovery processes, and the response start delay, response duration, final response quantity, and template confidence level of the corresponding link response template are updated. If the bit error rate or retransmission count exceeds the calibration abort threshold during the probing period, the output power before the probing is immediately restored and the update is stopped.

9. A microwave communication radio frequency power adaptive control system based on link state awareness, applied to the microwave communication radio frequency power adaptive control method based on link state awareness as described in any one of claims 1-8, characterized in that, include: The link monitoring unit is located at the receiving end of the microwave communication link. It is used to collect the received signal quality, bit error status, retransmission count and modulation and coding scheme, and generate link status reporting data with sampling time and feedback sequence number. A feedback interface is used to transmit the link status reporting data to the transmitter of the microwave communication link; The status awareness unit is used to time-align the link status reported data with the communication distance, radio frequency device operating temperature and power adjustment records, construct the link status evolution sequence and identify the link status. The response decomposition unit is used to store link response templates divided according to power adjustment direction, adjustment amplitude range, modulation and coding scheme, communication distance range and operating temperature range, and to determine the completed response amount and the response amount to be completed corresponding to the power adjustment record that is still in the response period. The change attribution unit is used to remove the completed response from the current link quality changes to obtain the exogenous link change. The control decision unit is used to generate power control commands, including adjustment direction, adjustment magnitude, hold duration and power recovery slope, based on link status, exogenous link changes, pending response quantities, link quality margin and RF device thermal margin. The power execution unit, including a power regulation circuit and a power amplifier, is used to execute the power control command and recover redundant power based on the phased verification results after the link is restored.

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