A power self-adaptive control method based on multi-operator co-construction scene interference

Abstract

The present application belongs to the field of communication technology, and relates to a power adaptive control method based on multi-operator co-construction scene interference. The present application determines the interference of different operators by acquiring the cell edge RSSI measurement value, tentatively reduces the power, and interacts the reference signal. The base station is marked as the suppression party or the victim party by combining the RSSI change direction and the phase feedback. The power adjustment intention is encoded as the phase offset, the opposite phase offset polarity is detected, the corresponding power adjustment is performed when the roles are complementary, the random phase jitter amount is superimposed when the roles are the same to compete for arbitration, and the absolute value is larger. The present application solves the problems that the existing unilateral control cannot distinguish the interference energy flow direction, the multi-network concurrent adjustment is disordered, and the low-overhead physical layer arbitration is lacking. The present application realizes the accurate determination of the interference role and the distributed ordered power control, avoids the signaling interaction delay, suppresses the power shock, and ensures that the multi-base station cooperates to quickly converge to the steady state.

Description

Technical Field

[0001] This invention belongs to the field of communication technology and relates to a power adaptive control method based on interference in a multi-operator co-construction scenario. Background Technology

[0002] As the coverage density of networks jointly built and shared by multiple operators increases, the signal quality in cell edge areas directly affects the overall network throughput and user experience. Received Signal Strength Indication (RSSI), as a physical layer indicator characterizing the total power received by a terminal within its frequency band, is used to assess the wireless environment and trigger power regulation.

[0003] To address cross-system interference issues in multi-operator co-construction scenarios, existing strategies typically involve each operator's network independently performing unilateral control based on RSSI. However, this approach suffers from several practical problems: First, when the RSSI at the service boundary abnormally increases, the base station can only detect the deterioration of the radio frequency environment and cannot distinguish whether the change is caused by local power spillover or power intrusion from adjacent networks. This lack of information prevents the unilateral adjustment logic from accurately determining whether the local side should act as the interference provider or recipient, leading to a power adjustment direction that deviates from the polarity required to eliminate interference and exacerbating power imbalances in edge areas.

[0004] Secondly, when multiple adjacent networks simultaneously detect RSSI exceeding the limit and initiate power adjustments on their own, due to the lack of a cross-network negotiation mechanism, a disordered concurrent state in which multiple networks perform adjustments in the same direction is very likely to occur. This same-direction adjustment will cause signal coverage gaps in local areas, causing power control to fall into a deadlock state.

[0005] Finally, existing cross-network collaborative information transmission relies on high-level signaling interaction. In multi-operator co-construction scenarios, frequent RSSI fluctuations are often accompanied by signaling channel quality degradation, resulting in low signaling parsing success rate and high latency, making it difficult to meet real-time collaboration requirements. In addition, when the adjustment requests of multiple parties directly conflict, the existing mechanism lacks a low-overhead and fair physical layer arbitration method, causing the base station transmission state to oscillate repeatedly, and the power control closed loop to fail to converge to a steady state. Summary of the Invention

[0006] In view of this, in order to solve the problems mentioned in the background technology, a power adaptive control method based on interference in multi-operator co-construction scenarios is proposed.

[0007] The objective of this invention can be achieved through the following technical solution: a power adaptive control method based on interference in a multi-operator co-construction scenario, comprising: S1, acquiring RSSI measurement values ​​at the cell edge, and determining that there is inter-operator interference when the RSSI measurement value exceeds a preset threshold.

[0008] S2. Adjust the base station's transmit power by a fixed step size, exchange inter-operator collaborative reference signals, and combine the change direction and phase feedback of the adjusted RSSI measurement value to mark the corresponding base station as the suppressor or victim.

[0009] S3. When multiple operator base stations need to adjust their power simultaneously, each base station sends a cooperative reference signal. The power reduction of the suppressor corresponds to the first phase offset, and the power increase requirement of the victim corresponds to the second phase offset.

[0010] S4. Detect the phase offset polarity of the cooperative reference signal sent by different operators. If the other party is the suppressor and the local party is the victim, then increase the power. If the other party is the victim and the local party is the suppressor, then decrease the power. If both parties have the same role, then both base stations generate random phase jitter and superimpose it on their respective cooperative reference signals to obtain the competitive phase offset value. When the absolute value of the local competitive phase offset value is greater than that of the other party, the local party takes priority in power adjustment.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention constructs a joint mapping criterion between the direction of received intensity change and the phase difference by combining fixed step power perturbation with phase feedback of the inter-operator cooperative reference signal. This solves the problem that the existing unilateral control cannot distinguish the actual flow of interference energy, resulting in misjudgment of reverse polarity of power adjustment. It realizes the role identification of the interference giver and receiver, ensures that the direction of transmit power adjustment is consistent with the interference elimination requirements, and effectively curbs the power imbalance state at the cell edge.

[0012] (2) This invention encodes the power adjustment intention as the phase offset polarity of the cooperative reference signal and introduces a random phase jitter superposition competition mechanism when there is a role conflict. This effectively alleviates the risk of power oscillation and control deadlock caused by the lack of priority adjudication in multi-network concurrent adjustment, improves the orderliness and convergence efficiency of distributed cooperative adjustment, avoids the waste of resources caused by blind synchronous adjustment of multiple nodes, and ensures the continuity of network coverage and the orderliness of power control in complex interference scenarios.

[0013] (3) This invention utilizes the implicit transmission of control intent via physical layer pilot phase rotation to replace higher-layer signaling interaction, and combines iterative convergence counting and over-limit backoff protection logic. This solves the problems of large coordination delays caused by channel degradation and repeated oscillations in base station transmission status due to the lack of conflict arbitration in traditional cross-network signaling transmission. It achieves low-overhead and highly reliable intent transmission and conflict resolution, blocks invalid power iterative cycles, and enables multi-base station collaborative control to quickly converge to a stable operating point. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a flowchart of a power adaptive control method based on interference in a multi-operator co-construction scenario, as described in this invention.

[0016] Figure 2 This is a flowchart of step S3 in the present invention;

[0017] Figure 3 This is a flowchart of step S4 in the present invention. Detailed Implementation

[0018] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0020] The following description, in conjunction with the accompanying drawings, details a specific scheme for a power adaptive control method based on interference in a multi-operator co-construction scenario provided by the present invention.

[0021] Please see Figure 1 As shown, the implementation of the present invention includes steps S1 to S4: In order to solve the problem that in the scenario of multi-operator base station co-construction and sharing, inter-frequency / co-frequency interference signals are superimposed and coupled in the cell edge area, resulting in the deterioration of the reception quality of edge users and the sharp drop in throughput, and the traditional centralized coordination mechanism has technical bottlenecks such as large signaling interaction overhead and delayed scheduling response, the present invention constructs a distributed power adaptive control mechanism based on cooperative reference signal and phase feedback.

[0022] Step S1 addresses the real-time perception and process triggering of interference status by collecting Received Signal Strength Indication (RSSI) measurements at the cell edge and comparing them with a preset threshold to quickly determine the presence of interference. Step S2 addresses the issues of unclear interference energy flow and base station role classification by constructing an interference flow criterion based on the RSSI change direction and phase difference sign through fixed-step power perturbation and coherent demodulation of the cooperative signal. Step S3 addresses the issues of low transmission efficiency of multi-base station control intentions and high explicit signaling overhead by mapping power up / down adjustments to mutually exclusive phase offsets and directly modulating them onto pilot subcarriers to achieve implicit physical-layer broadcasting of control commands. Step S4 addresses the decision conflict problem during concurrent adjustments by using phase polarity analytical matching and random phase jitter competition arbitration to achieve adjustment priority determination under decentralized coordination. Ultimately, this results in a distributed power adaptive control capability with low signaling interaction overhead, high conflict resolution efficiency, and dynamic environmental adaptability.

[0023] S1. Obtain RSSI measurement values ​​at the cell edge. When the RSSI measurement value exceeds a preset threshold, it is determined that there is interference from other operators.

[0024] Considering the scenario of multi-operator base station co-construction and sharing, the cell edge area is highly susceptible to the superposition of co-frequency or adjacent-frequency signals from neighboring base stations of different operators, which leads to an abnormal increase in RSSI, and in turn causes a sharp drop in throughput and an increase in bit error rate for edge users.

[0025] Therefore, by periodically collecting received signal data reported by user terminals at the cell edge, the base station receiver aggregates the measurement reports reported by user terminals within a specific geographical area at the cell edge. Considering that instantaneous measurement values ​​may fluctuate drastically due to rapid fading or sudden traffic, a moving average filter is needed to smooth the data curve. The RSSI measurement value after moving average filtering is then extracted and compared with a preset threshold.

[0026] If the RSSI measurement value is greater than a preset threshold, it is determined that there is interference from another operator; otherwise, it is determined that there is no interference from another operator, the base station maintains its current transmit power, and re-acquires received signal data. The preset threshold is determined based on the statistical mean of historical RSSI monitoring data at the cell edge, plus an interference identification margin. For example, the interference identification margin is 3dB, and it is sent to the base station through the network management configuration interface.

[0027] S2. Adjust the base station's transmit power by a fixed step size, exchange inter-operator collaborative reference signals, and combine the change direction and phase feedback of the adjusted RSSI measurement value to mark the corresponding base station as the suppressor or victim.

[0028] In scenarios lacking inter-operator signaling plane interconnection channels, base stations cannot directly obtain the power configuration and scheduling strategies of peer equipment. Relying solely on single signal strength monitoring makes it difficult to accurately distinguish the actual radiation direction of interference energy. Therefore, by controlling the local transmit power to generate small disturbances in fixed steps, and combining the change direction and phase feedback of RSSI measurements before and after the adjustment, blind judgment of the interference energy flow direction can be achieved.

[0029] In one specific embodiment, the current base station transmit power is adjusted downwards (i.e., cumulatively reduced) with a fixed step size to obtain the adjusted transmit power. The base station's radio frequency front-end is then controlled to switch its output power to the adjusted transmit power. It should be noted that the power downward adjustment is a tentative disturbance used to detect the direction of interference flow, and its step size, for example, 0.5 dB, and duration, for example, one transmission time interval (TTI), are both extremely small.

[0030] After the power reduction is implemented, this base station interacts with the base station of the other operator to exchange cooperative reference signals. Specifically, this base station sends a cooperative reference signal carrying the local reference phase to the base station of the other operator through the air interface, and simultaneously receives the cooperative reference signal sent by the base station of the other operator in response.

[0031] After the trial power adjustment is completed, the adjusted RSSI measurement value is collected, and the difference between it and the RSSI measurement value before adjustment is calculated. The direction of change is determined according to the positive or negative attribute of the difference: if the difference is greater than zero, the direction of change is determined to be positive; if the difference is less than zero, the direction of change is determined to be negative; if the difference is zero, it indicates that the power adjustment has not caused a change in the received signal strength. In this case, the current transmit power is maintained, and the interaction of the inter-operator cooperative reference signal is retried to obtain a new round of phase feedback.

[0032] The received inter-operator cooperative reference signal is demodulated to extract the phase difference value. Specifically, the complex symbol sequence corresponding to the pilot subcarrier is extracted, and cross-correlation operation is performed between it and the locally generated reference sequence to obtain the complex correlation peak value. Then, the arctangent phase solution is performed on the real part and imaginary part of the complex correlation peak value to obtain the phase difference value between the carrier phase of the pilot symbol and the local reference phase.

[0033] If the relative phase difference is greater than zero, the phase feedback identifier is determined to be the first polarity; if it is less than zero, it is determined to be the second polarity. The polarity identifier is only used as a protocol criterion for distributed cooperative control and does not represent the physical propagation direction of electromagnetic waves.

[0034] If the phase difference is zero, it means that the phase of the received signal is synchronized with the local reference phase. The phase is then determined to be in a neutral alignment state. The current transmit power is maintained and the inter-operator cooperative reference signal is continued to be exchanged to obtain a new round of phase feedback.

[0035] When the direction of change is negative and the phase feedback is marked as the first polarity, it indicates that the RSSI decreases after the base station's transmit power decreases, and the phase feedback shows that the base station's signal contributes mainly to the interference of users at the edge of different operators. That is, the interference energy is radiated outward from this cell. This base station is determined to be the interference-dominant side and is marked as the suppression side.

[0036] When the direction of change is positive and the phase feedback is marked as the second polarity, it indicates that the RSSI also decreases after the base station's transmission power is reduced. However, the phase feedback shows that the interference contribution of the signal from the other operator to the edge users of this cell is dominant. That is, the interference energy converges from the other operator to this cell. This base station is determined to be the interference-controlled side and is marked as the victim.

[0037] S3. When multiple operator base stations need to adjust their power simultaneously, each base station sends a cooperative reference signal. The power reduction of the suppressor corresponds to the first phase offset, and the power increase requirement of the victim corresponds to the second phase offset.

[0038] In a distributed control architecture, multiple base stations may detect interference events simultaneously and each make its own power adjustment decisions. If the suppressor and the victim perform the same-direction adjustment or opposite-direction cancellation operation at the same time, it will cause power oscillation or even coverage gaps.

[0039] Therefore, by encoding the power adjustment intentions of each base station into the phase offset polarity of the cooperative reference signal, where the power reduction of the suppressor corresponds to the first phase offset and the power increase demand of the victim corresponds to the second phase offset, the control intentions are carried by the phase rotation direction of the physical layer, thus achieving conflict-free information broadcasting.

[0040] Please see Figure 2 As shown, the specific content of step S3 is as follows: S31, obtain the role identifier of the local base station and the corresponding power adjustment amount. If the local base station is marked as the suppressor, multiply the decibel value of the power reduction amount by the preset phase mapping coefficient to obtain the positive phase rotation step size, which is used as the first phase offset.

[0041] S32. If the local base station is marked as the victim, the decibel value of the power increase is multiplied by a preset phase mapping coefficient, and the negative value is obtained to get the negative phase rotation step size, which is used as the second phase offset. The phase mapping coefficient K satisfies k=Δφ / ΔP, where Δφ is the change in phase rotation angle, ΔP is the power adjustment amount, and the phase mapping coefficient K is a pre-configured system constant, for example, configured as 30° / dB.

[0042] S33. When generating the cooperative reference signal, pilot phase modulation is performed for the two different roles: when the local base station is marked as the suppressor, the first phase offset is input into the baseband modulation unit in the baseband processor of the base station, converted into the corresponding complex rotation factor, and the baseband complex symbol of the pilot subcarrier is subjected to positive phase rotation to generate a cooperative reference signal carrying the intention of power downsampling.

[0043] When the local base station is identified as the victim, the second phase offset is input to the baseband modulation unit and converted into the corresponding complex rotation factor. The baseband complex symbols of the pilot subcarrier are subjected to negative phase rotation to generate a cooperative reference signal carrying the intention of power upscaling.

[0044] While carrying out conventional channel detection functions, this cooperative reference signal implicitly conveys the intended adjustment direction of the base station in the current interference event by utilizing the rotation polarity of the pilot phase. This allows the receiver to determine the role and intention of the transmitter simply by identifying the phase symbol, without needing to demodulate the higher-layer signaling content.

[0045] Specifically, by making the positive and negative phase rotation steps mutually exclusive, the polarities of the first and second phase offsets are kept opposite, thereby ensuring that the cooperative reference signals sent by the suppressor and the victim are distinguishable in the phase domain, and avoiding role resolution ambiguity at the receiver during phase calculation.

[0046] S4. Detect the phase offset polarity of the cooperative reference signal sent by different operators. If the other party is the suppressor and the local party is the victim, then increase the power. If the other party is the victim and the local party is the suppressor, then decrease the power. If both parties have the same role, then both base stations generate random phase jitter and superimpose it on their respective cooperative reference signals to obtain the competitive phase offset value. When the absolute value of the local competitive phase offset value is greater than that of the other party, the local party takes priority in power adjustment.

[0047] In a distributed collaborative architecture, if multiple base stations adjust concurrently without a priority decision mechanism, adjustments in the same direction will lead to power over-adjustment or cancellation. To avoid control deadlock and achieve decentralized coordination, the roles of different operators are identified by detecting the phase offset polarity of the collaborative reference signal transmitted by them. When roles are complementary, the corresponding power adjustment is directly executed; when roles conflict, random phase jitter is generated and superimposed on the collaborative reference signal to compete for air interface power, thus determining the priority adjustment party in a distributed manner.

[0048] Please see Figure 3As shown, the specific content of step S4 is as follows: S41. Receive and demodulate the cooperative reference signal sent by the base station of the other operator, extract the phase offset value of its pilot subcarrier phase relative to the local reference phase, and take the sign bit of the phase offset value as the polarity identifier. If the polarity identifier is positive, the other party is determined to be the suppressor; if the polarity identifier is negative, the other party is determined to be the victim.

[0049] S42. When the polarity indicator indicates that the other party is the suppressor and the other party is marked as the victim, it means that the roles of both parties are complementary and the other party is being interfered with and harmed. The other party will increase the transmission power.

[0050] S43. When the polarity indicator indicates that the other party is the victim and the other party is marked as the suppressor, it means that the roles of both parties are complementary and the other party is causing interference to the other party. The other party will reduce the transmission power.

[0051] S44. When both sides have the same role, the local base station generates a random phase jitter amount within a preset phase interval. The specific generation method is as follows: the pseudo-random number generator of the baseband processing unit is called to generate a normalized initial random value, the value range of which is 0 to 1; the interval width of the preset phase interval is calculated, the interval width being the difference between the upper limit boundary value and the lower limit boundary value; the initial random value is multiplied by the interval width, and the lower limit boundary value is added, and the calculation result is used as the random phase jitter amount.

[0052] The upper and lower boundary values ​​must be set such that their absolute values ​​are both less than the minimum absolute value of the first or second phase offset, to ensure that the sign bit of the competing phase offset value does not flip after the random phase jitter is superimposed. For example, when the minimum absolute value of the phase offset is π / 2, the upper boundary value is set to +π / 4 and the lower boundary value is set to -π / 4.

[0053] If the local base station is marked as the suppressor, the random phase jitter is superimposed on the first phase offset. That is, the positive phase rotation step size and the random phase jitter are algebraically summed to obtain the local competitive phase offset value, and the superimposed phase value is modulated onto the pilot subcarrier of the cooperative reference signal for transmission.

[0054] If the local base station is marked as the victim, the random phase jitter is superimposed on the second phase offset, that is, the negative phase rotation step size and the random phase jitter are algebraically summed to obtain the local competitive phase offset value, and the superimposed phase value is modulated onto the pilot subcarrier of the cooperative reference signal for transmission.

[0055] Our base station receives and demodulates the cooperative reference signal transmitted by the other base station, and extracts the other's contention phase offset value. We then calculate the absolute values ​​of our contention phase offset and the other's contention phase offset, and compare their magnitudes.

[0056] When the absolute value of the phase offset value of our side is greater than that of the other side, we are determined to win the competition and immediately execute the corresponding power increase or power decrease.

[0057] When the absolute value of the phase offset of the competing party is less than or equal to that of the competing party, the competing party is deemed to have failed and enters a yielding waiting state. After the yielding delay, the RSSI measurement value is re-acquired to evaluate the interference status after the winning party's adjustment. If the interference still exists, the competing party initiates a power adjustment request again.

[0058] Furthermore, to control the convergence of the power adjustment process, iterative loop control is executed as follows: The adjustment iteration counter is initialized, and a maximum number of adjustments is set. The maximum number of adjustments can be configured based on the upper limit obtained by dividing the maximum power adjustment range by a fixed step size. After each power adjustment and collaborative decision is completed, the RSSI measurement values ​​of users at the cell edge are re-acquired, and it is determined whether the currently acquired RSSI measurement value has fallen back to within a preset threshold. If so, inter-operator interference is determined to be eliminated, the iterative loop process from steps S1 to S4 is terminated, and the current base station transmit power configuration is locked.

[0059] If the RSSI measurement value does not fall back to within the preset threshold, the adjustment iteration counter is incremented and updated, and it is determined whether the updated counter value has reached the maximum number of adjustments. If the maximum number of adjustments is reached, the adjustment termination protection mechanism is triggered, power adjustment is stopped and the base station transmit power is rolled back to the state before the power adjustment, the adjustment iteration counter is reset and the loop is exited, in order to prevent unlimited adjustments from affecting network stability.

[0060] If the maximum number of adjustments is not reached, return to step S2 and continue the next round of power adjustment and coordination decision until the RSSI measurement value falls back to within the preset threshold or the termination condition of the maximum number of adjustments is met.

[0061] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, in the form of a computer program product.

[0062] Those skilled in the art will recognize that the algorithmic 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 implementations should not be considered beyond the scope of this application.

[0063] 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.

[0064] 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.

[0065] Finally, 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 power adaptive control method based on interference in a multi-operator co-construction scenario, characterized in that, include: S1. Obtain RSSI measurement values ​​at the cell edge. If the RSSI measurement value exceeds a preset threshold, it is determined that there is interference from other operators. S2. Reduce the base station's transmit power by a fixed step size, interact with inter-operator collaborative reference signals, and combine the change direction and phase feedback of the adjusted RSSI measurement value to mark the corresponding base station as the suppressor or victim. S3. When multiple operator base stations need to adjust their power at the same time, each base station sends a cooperative reference signal. The power reduction of the suppressor corresponds to the first phase offset, and the power increase requirement of the victim corresponds to the second phase offset. S4. Detect the phase offset polarity of the cooperative reference signal sent by different operators. If the other party is the suppressor and the local party is the victim, then increase the power. If the other party is the victim and the local party is the suppressor, then decrease the power. If both parties have the same role, then both base stations generate random phase jitter and superimpose it on their respective cooperative reference signals to obtain the competitive phase offset value. When the absolute value of the local competitive phase offset value is greater than that of the other party, the local party takes priority in power adjustment.

2. The power adaptive control method based on interference in a multi-operator co-construction scenario as described in claim 1, characterized in that, Step S1 specifically includes: The received signal data reported by user terminals at the cell edge are periodically collected, and the RSSI measurement value is extracted after being processed by moving average filtering. If the RSSI measurement value is greater than the preset threshold, it is determined that there is interference from other operators; otherwise, it is determined that there is no interference from other operators, the base station maintains its current transmit power and re-acquires received signal data.

3. The power adaptive control method based on interference in a multi-operator co-construction scenario as described in claim 1, characterized in that, The method of reducing the base station transmit power in fixed steps specifically includes: The base station transmit power is updated by cumulatively decreasing the current transmit power in fixed steps to obtain the adjusted transmit power. The base station radio frequency front end is then controlled to switch the output power to the adjusted transmit power.

4. The power adaptive control method based on interference in a multi-operator co-construction scenario as described in claim 1, characterized in that, The step of combining the change direction and phase feedback of the adjusted RSSI measurement value to mark the corresponding base station as the suppressor or victim specifically includes: After the power adjustment is completed, the adjusted RSSI measurement value is collected, the difference between the adjusted RSSI measurement value and the RSSI measurement value before adjustment is calculated, and the direction of change is determined according to the positive or negative attribute of the difference. The received inter-carrier cooperative reference signal is demodulated to extract the phase difference between the carrier phase of the pilot symbol and the local reference phase. If the phase difference is greater than zero, the phase feedback identifier is determined to be the first polarity; if the phase difference is less than zero, the phase feedback identifier is determined to be the second polarity. When the direction of change is negative and the phase feedback identifier is the first polarity, this base station is determined to be the interference-dominant side and marked as the suppression side; When the direction of change is positive and the phase feedback indicator is the second polarity, this base station is determined to be the interference-controlled side and marked as the victim.

5. The power adaptive control method based on interference in a multi-operator co-construction scenario as described in claim 4, characterized in that, The method of determining the direction of change based on the positive or negative attribute of the difference also includes: If the difference is zero, maintain the current transmit power and re-trigger the interaction of the inter-operator cooperative reference signal to obtain phase feedback.

6. The power adaptive control method based on interference in a multi-operator co-construction scenario as described in claim 1, characterized in that, Step S3 specifically includes: The suppression base station converts the determined power downsizing amount into a positive phase rotation step size, which is used as the first phase offset; The victim's base station converts the determined power increase requirement into a negative phase rotation step size as the second phase offset; The first or second phase offset is converted into a corresponding complex rotation factor and modulated onto the pilot subcarrier phase of the cooperative reference signal to generate the cooperative reference signal.

7. The power adaptive control method based on interference in a multi-operator co-construction scenario as described in claim 6, characterized in that, The first phase offset and the second phase offset have opposite polarities, and the corresponding positive phase rotation step and negative phase rotation step have mutually exclusive rotation directions.

8. The power adaptive control method based on interference in a multi-operator co-construction scenario as described in claim 1, characterized in that, Step S4 specifically includes: Receive and demodulate the cooperative reference signal sent by base stations of different operators, and extract the sign bit of the phase offset as the polarity identifier; The role of the other base station is identified based on the polarity identifier, and power control is performed in conjunction with the role already marked by the other party, as follows: When the polarity indicator indicates that the other party is the suppressor and this party is marked as the victim, this party will increase the transmission power; When the polarity indicator indicates that the other party is the victim and this party is marked as the suppressor, this party will reduce the transmission power. When both sides have the same role, the local base station generates random phase jitter within a preset phase interval, and adds the random phase jitter to the first phase offset or the second phase offset to obtain the local competitive phase offset value. Simultaneously analyze the opponent's competitive phase offset value, calculate the absolute value of the competitive phase offset value of our side and the opponent respectively, and compare their magnitudes; When the absolute value of the phase offset of the competing party is greater than that of the competing party, the competing party is determined to have won the competition and the corresponding power adjustment is immediately executed; when the absolute value of the phase offset of the competing party is less than or equal to that of the competing party, the competing party is determined to have lost the competition and enters the avoidance and waiting state.

9. The power adaptive control method based on interference in a multi-operator co-construction scenario as described in claim 8, characterized in that, The local base station generates random phase jitter within a preset phase interval, specifically including: The pseudo-random number generator of the baseband processing unit is invoked to generate an initial random value. Based on the upper and lower boundary values ​​of the preset phase interval, the initial random value is linearly mapped to the preset phase interval, and the random phase jitter is output.

10. The power adaptive control method based on interference in a multi-operator co-construction scenario as described in claim 1, characterized in that, Step S4 further includes iterative loop control: Initialize and adjust the iteration counter and set the maximum number of adjustments; After each power adjustment and coordination decision is completed, the RSSI measurement value of the cell edge user is re-collected, and it is determined whether the currently collected RSSI measurement value has fallen back to within the preset threshold. If so, it is determined that the inter-operator interference has been eliminated, the loop iteration from step S1 to step S4 is terminated, and the current base station transmit power configuration is locked. If the value does not fall back to within the preset threshold, the adjustment iteration counter is incremented and updated, and it is determined whether the updated counter value has reached the maximum number of adjustments. If the maximum number of adjustments is reached, the adjustment termination protection mechanism is triggered, the power adjustment is stopped and the base station transmit power is rolled back to the state before the power adjustment, the adjustment iteration counter is reset and the loop is exited; If the maximum number of adjustments is not reached, return to step S2 until the RSSI measurement value falls back to within the preset threshold or the maximum number of adjustments is reached, thus terminating the process.

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