A method and system for controlling output power of base station transmitter

Abstract

The present invention relates to the technical field of output power control, and specifically discloses a method and system for base station transmitter output power control, comprising: step S1: setting a signal strength threshold value to determine the minimum output power; obtaining the minimum power data of the base station under different user density loads, and generating a minimum power curve; step S2: setting a collection period, monitoring the user density load of the base station in each period, and obtaining a daily user density load curve; determining an ascending interval and a descending interval according to a maximum point and a minimum point, and determining an adjustment time point; and obtaining an adjustment interval according to the adjustment time point, and obtaining a target power; step S3: obtaining the user density load of the current base station in real time, and generating a current load curve; obtaining an offset and a lifting amount in real time by comparing the current load curve with the corresponding part of the load standard curve; correcting the next adjustment time point, and obtaining a predicted adjustment time point and a corresponding predicted target power.

Description

Technical Field

[0001] The present invention relates to the technical field of output power control, and in particular to a method and system for controlling the output power of a base station transmitter. Background Art

[0002] The base station transmitter is a key device for sending wireless signals in mobile communication systems; it is mainly responsible for converting baseband signals into radio frequency signals and transmitting them through antennas to achieve information transmission between mobile phone terminals.

[0003] Output power control of base station transmitters is a key technical means to ensure signal transmission quality and energy efficiency in mobile communication networks; it dynamically adjusts the output power of base station transmitters according to the communication environment and user needs.

[0004] In the prior art, the output power control of a base station transmitter is usually dynamically adjusted based on the user density load intensity within its signal range; this adjustment mechanism is intended to optimize signal coverage, reduce interference, improve energy efficiency, and meet communication quality under different time periods and business requirements; however, despite the many benefits brought about by this dynamic adjustment, frequent changes in output power may also have an adverse effect on base station equipment; specifically, when a base station transmitter continuously adjusts its output power according to changes in user density load, its internal power amplifier module, RF link and other related components will experience repeated pressure changes and thermal stress cycles; these frequent power fluctuations may cause rapid rise and fall in component temperature, thereby accelerating material aging and fatigue, and ultimately affecting the stability and service life of the equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a method and system for controlling the output power of a base station transmitter to solve the above technical problems.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for controlling the output power of a base station transmitter comprises the following steps:

[0008] Step S1: Set a signal strength threshold R, and record the minimum output power required for the signal strength received by the user to reach the signal strength threshold as the minimum power; obtain the user density load of the base station, and obtain the minimum power corresponding to the base station when it is under different user density loads, and generate a minimum power curve according to the minimum power corresponding to each user density load;

[0009] Step S2: setting a collection period, obtaining the daily user density load of the base station in the collection period in real time, obtaining the daily user density load curve, and obtaining the load standard curve according to each user density load curve; obtaining the maximum value point and the minimum value point of the load standard curve, and determining the rising interval and the falling interval of the load standard curve according to the maximum value point and the minimum value point; obtaining the midpoint of the rising interval and the falling interval, and recording it as the adjustment time point T;

[0010] Every two adjacent adjustment time points constitute an adjustment interval, obtain the maximum user density load of the load standard curve in the adjustment interval, and obtain the minimum output power corresponding to the maximum user density load according to the minimum power curve, which is recorded as the target power P of the adjustment interval; correspond each adjustment time point to the target power of the first adjustment interval after the adjustment time point;

[0011] Step S3: obtaining the user density load of the current base station in real time, and generating the current load curve in real time; obtaining the horizontal coordinates corresponding to the starting point and the latest point of the current load curve, obtaining the collection interval, and obtaining the curve segment corresponding to the collection interval on the load standard curve;

[0012] According to the current load curve and curve segment, the offset Oa and the rise and fall La of the current load curve are obtained in real time; then, on the current load curve, the next adjustment time point is corrected in real time to obtain the predicted adjustment time point T´=T+Oa, and the predicted target power P´=P+La corresponding to the predicted adjustment time point is obtained; every time the predicted adjustment time point is reached, the output power of the current base station is adjusted once to the predicted target power.

[0013] As a further solution of the present invention: the process of obtaining the user density load includes:

[0014] Obtain the signal coverage area of ​​the base station, divide the signal coverage area into grids, and obtain a number of sub-areas; obtain the number of users n in the sub-area, and obtain the area S of the sub-area, and obtain the user density Ud=n / S of the sub-area; obtain the user density of each sub-area, select the maximum value of the user density, and record it as the user density load of the base station at this time.

[0015] As a further solution of the present invention: the setting range of the collection period is [March, December].

[0016] As a further solution of the present invention: the acquisition of the user density load curve includes:

[0017] A collection time interval threshold is set, and every other collection time interval threshold is recorded as a collection moment. The user density load is obtained once at each collection moment, and the collection moment also includes 0 o'clock every day; a rectangular coordinate system is established with time as the horizontal coordinate and user density load as the vertical coordinate; the user density load corresponding to each collection moment is converted into a coordinate point of a corresponding position on the rectangular coordinate system, and each coordinate point is connected with a smooth curve, and the curve is recorded as a user density load curve.

[0018] As a further solution of the present invention: the process of determining the ascending interval and the descending interval includes:

[0019] The starting point, end point, maximum point and minimum point of the load standard curve are obtained, all of which are recorded as endpoints; the horizontal coordinates corresponding to the endpoints are obtained, which are recorded as nodes, and every two adjacent nodes constitute an interval, which is recorded as [T a , T b ];

[0020] If T in the interval a The end point corresponding to the load standard curve is the minimum point, and T b When the end point corresponding to the load standard curve is a maximum point or an end point, the interval is an ascending interval; if T a The end point corresponding to the load standard curve is the starting point, and T b When the end point corresponding to the load standard curve is a maximum point, the interval is an ascending interval;

[0021] If T in the interval a The end point corresponding to the load standard curve is the maximum point, and T b When the endpoint corresponding to the load standard curve is a minimum point or an end point, the interval is a descending interval; if T a The end point corresponding to the load standard curve is the starting point, and T b When the end point corresponding to the load standard curve is a minimum point, the interval is a descending interval.

[0022] As a further solution of the present invention: the process of obtaining the offset includes:

[0023] Obtain all extreme points on the curve segment and number each extreme point; obtain the extreme point of the current load curve, record it as the current extreme point, and number each current extreme point; then obtain the offset Among them Ep i Represents the i-th extreme point, Ep i ´ represents the i-th current extreme point, i∈[1,m] and i is a positive integer, and m is the total number of current extreme points.

[0024] As a further solution of the present invention: the lifting amount , where f´(t) is the expression of the current load curve, f(t) is the expression of the curve segment, t0 is the acquisition time corresponding to the starting point of the current load curve, t num is the collection time corresponding to the latest point of the current load curve.

[0025] As a further solution of the present invention: the process of adjusting the output power of the current base station to the predicted target power also includes:

[0026] The lowest power corresponding to the midpoint of the first interval of the load standard curve is obtained and recorded as the initial power of the base station; before reaching the first predicted adjustment time point, the base station uses the initial power as the output power.

[0027] As a further solution of the present invention: a base station transmitter output power control system, comprising:

[0028] Power calibration module: set the signal strength threshold R, and record the minimum output power required for the signal strength received by the user to reach the signal strength threshold as the minimum power; obtain the user density load of the base station, and obtain the minimum power corresponding to the base station when it is under different user density loads, and generate the minimum power curve according to the minimum power corresponding to each user density load;

[0029] Adjustment preprocessing module: set a collection period, obtain the daily user density load of the base station in the collection period in real time, obtain the daily user density load curve, and obtain the load standard curve according to each user density load curve; obtain the maximum value point and the minimum value point of the load standard curve, and determine the rising interval and the falling interval of the load standard curve according to the maximum value point and the minimum value point; obtain the midpoint of the rising interval and the falling interval, and record it as the adjustment time point T;

[0030] Every two adjacent adjustment time points constitute an adjustment interval, obtain the maximum user density load of the load standard curve in the adjustment interval, and obtain the minimum output power corresponding to the maximum user density load according to the minimum power curve, which is recorded as the target power P of the adjustment interval; correspond each adjustment time point to the target power of the first adjustment interval after the adjustment time point;

[0031] Adjustment module: obtain the user density load of the current base station in real time, and generate the current load curve in real time; obtain the horizontal coordinates corresponding to the starting point and the latest point of the current load curve, obtain the collection interval, and obtain the curve segment corresponding to the collection interval on the load standard curve;

[0032] According to the current load curve and curve segment, the offset Oa and the rise and fall La of the current load curve are obtained in real time; then, on the current load curve, the next adjustment time point is corrected in real time to obtain the predicted adjustment time point T´=T+Oa, and the predicted target power P´=P+La corresponding to the predicted adjustment time point is obtained; every time the predicted adjustment time point is reached, the output power of the current base station is adjusted once to the predicted target power.

[0033] Beneficial effects of the present invention:

[0034] The present invention helps to reduce unnecessary energy consumption by adjusting the output power of the base station in real time to match the actual user density load. When the user density is low, the base station can reduce its output power, thereby saving energy and reducing operating costs. Maintaining the signal strength at a reasonable level can ensure that users receive stable and high-quality communication services. By dynamically adjusting the transmission power, the best signal coverage is provided according to user needs and network conditions. Since the user density changes dynamically, the present invention can respond quickly to these changes and adjust the output power accordingly. This flexibility is particularly important for handling network congestion during peak hours. By avoiding long-term operation in a high-power state, the present invention can reduce the wear and tear of base station equipment, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Figure 1 It is a flow chart of a method for controlling output power of a base station transmitter according to the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1 As shown, the present invention is a method for controlling the output power of a base station transmitter, comprising the following steps:

[0039] Step S1: Set a signal strength threshold R, and record the minimum output power required for the signal strength received by the user to reach the signal strength threshold as the minimum power; obtain the user density load of the base station, and obtain the minimum power corresponding to the base station when it is under different user density loads, and generate a minimum power curve according to the minimum power corresponding to each user density load;

[0040] It can be understood that the signal strength threshold is the minimum signal strength level to ensure that the user equipment can reliably receive the signal; the signal strength threshold is determined based on the wireless communication standard and the signal propagation characteristics under specific environmental conditions; the minimum power is the minimum power level that the base station must transmit in order to achieve the above signal strength threshold; this acquisition process usually involves considering factors such as path loss, obstacle attenuation, and multipath effect; a curve is drawn based on the minimum output power requirements under different user densities; this curve shows how the minimum output power required to meet the signal strength threshold changes as the user density increases; using the generated minimum power curve as a reference, the base station can dynamically adjust its transmission power according to the current actual user density; if the user density is high, the base station may need to increase power to ensure signal quality; conversely, if the user density is low, the base station can reduce power to save energy;

[0041] As a preferred embodiment of the present invention, the process of obtaining the user density load includes:

[0042] Obtain the signal coverage area of ​​the base station, divide the signal coverage area into grids, and obtain several sub-areas; obtain the number of users n in the sub-area, and obtain the area S of the sub-area, and obtain the user density Ud=n / S of the sub-area; obtain the user density of each sub-area, select the maximum value of the user density, and record it as the user density load of the base station at this time; it can be understood that the number of users refers to the number of devices connected to the signal of the base station; the signal coverage area is the geographical area that can be covered by the base station signal, and the size and shape of this area depend on many factors, including the transmission power of the base station, the antenna height, the terrain and the surrounding environment; when counting the number of users in each sub-area, the location of the user device can be determined by positioning technology, or indirectly inferred by the user's connection request; among all the calculated sub-area user densities, select the largest one as the user density load of the base station at this time; this maximum value represents the highest user demand pressure point faced by the base station at the current moment;

[0043] Step S2: setting a collection period, obtaining the daily user density load of the base station in the collection period in real time, obtaining the daily user density load curve, and obtaining the load standard curve according to each user density load curve; obtaining the maximum value point and the minimum value point of the load standard curve, and determining the rising interval and the falling interval of the load standard curve according to the maximum value point and the minimum value point; obtaining the midpoint of the rising interval and the falling interval, and recording it as the adjustment time point T;

[0044] Every two adjacent adjustment time points constitute an adjustment interval, obtain the maximum user density load of the load standard curve in the adjustment interval, and obtain the minimum output power corresponding to the maximum user density load according to the minimum power curve, which is recorded as the target power P of the adjustment interval; correspond each adjustment time point to the target power of the first adjustment interval after the adjustment time point;

[0045] It should be noted that the process of obtaining the load standard curve includes:

[0046] Obtaining an average value of the user density load of each user density load curve at each collection time, recorded as a user density load average; generating a load standard curve according to the user density load average corresponding to each collection time;

[0047] It can be understood that the daily user density load curve shows the changes in user density at different time points in a day; the daily user density load curves in all collection periods are summarized and a load standard curve is calculated; this curve reflects the typical user density level of the base station in different time periods; the load standard curve is analyzed to find its maximum and minimum points; these extreme points represent the highest peak and lowest valley of the user density load; according to the maximum and minimum points, the load standard curve is divided into an ascending interval and a descending interval; the ascending interval represents the stage where the user density load gradually increases, while the descending interval represents the stage where the user density load gradually decreases;

[0048] As a preferred embodiment of the present invention, the setting range of the collection period is [March, December];

[0049] It is understandable that the minimum time in the setting process of the collection cycle is 3 months, that is, one quarter, which reflects the change of user density load in the base station in one season; the maximum time can be set to one year, which represents the change of user density load in the base station in one year;

[0050] As a preferred embodiment of the present invention, obtaining the user density load curve includes:

[0051] A collection time interval threshold is set, and every other collection time interval threshold is recorded as a collection moment. A user density load is obtained at each collection moment, and the collection moment also includes 0 o'clock every day; a rectangular coordinate system is established with time as the horizontal coordinate and user density load as the vertical coordinate; the user density load corresponding to each collection moment is converted into a coordinate point of a corresponding position on the rectangular coordinate system, and each coordinate point is connected with a smooth curve, and the curve is recorded as a user density load curve;

[0052] It can be understood that when each set time interval (collection time) arrives, the current user density load is obtained and recorded; this includes the 0 o'clock time of each day to ensure the continuity and integrity of the data;

[0053] As a preferred embodiment of the present invention, the process of determining the ascending interval and the descending interval includes:

[0054] The starting point, end point, maximum point and minimum point of the load standard curve are obtained, all of which are recorded as endpoints; the horizontal coordinates corresponding to the endpoints are obtained, which are recorded as nodes, and every two adjacent nodes constitute an interval, which is recorded as [T a , T b ];

[0055] If T in the interval a The end point corresponding to the load standard curve is the minimum point, and T b When the end point corresponding to the load standard curve is a maximum point or an end point, the interval is an ascending interval; if T a The end point corresponding to the load standard curve is the starting point, and T b When the end point corresponding to the load standard curve is a maximum point, the interval is an ascending interval; if T a The end point corresponding to the load standard curve is the maximum point, and T b When the endpoint corresponding to the load standard curve is a minimum point or an end point, the interval is a descending interval; if T a The end point corresponding to the load standard curve is the starting point, and T b When the end point corresponding to the load standard curve is a minimum point, the interval is a descending interval;

[0056] It should be noted that, on the load standard curve, each time an adjustment time point is reached, the output power of the base station is adjusted to the minimum power corresponding to the maximum user density load in the next adjustment interval, so that the output power of the base station can meet the user density load in the next adjustment interval; compared with the method of adjusting the output power of the base station in real time in the prior art, this method reduces the number of adjustments and avoids the impact of too many adjustments on the life of the base station;

[0057] Step S3: obtaining the user density load of the current base station in real time, and generating the current load curve in real time; obtaining the horizontal coordinates corresponding to the starting point and the latest point of the current load curve, obtaining the collection interval, and obtaining the curve segment corresponding to the collection interval on the load standard curve;

[0058] According to the current load curve and curve segment, the offset Oa and the lifting amount La of the current load curve are obtained in real time; then, on the current load curve, the next adjustment time point is corrected in real time to obtain the predicted adjustment time point T'=T+Oa, and the predicted target power P'=P+La corresponding to the predicted adjustment time point is obtained; each time the predicted adjustment time point is reached, the output power of the current base station is adjusted to the predicted target power;

[0059] It can be understood that the offset is the lateral offset of the curve segment compared to the load standard curve. If Oa<0, the curve segment is offset to the left by a distance of |Oa| compared to the load standard curve; if Oa>0, the curve segment is offset to the right by a distance of |Oa| compared to the load standard curve; the lifting amount is the longitudinal offset of the curve segment compared to the load standard curve. If La<0, the curve segment is offset downward by a distance of |Oa| compared to the load standard curve; if Oa>0, the curve segment is offset upward by a distance of |Oa| compared to the load standard curve;

[0060] As a preferred embodiment of the present invention, the process of obtaining the offset includes:

[0061] Obtain all extreme points on the curve segment and number each extreme point; obtain the extreme point of the current load curve, record it as the current extreme point, and number each current extreme point; then obtain the offset , where Ep i Represents the i-th extreme point, Ep i ´ represents the i-th current extreme value point, i∈[1,m] and i is a positive integer, and m is the total number of current extreme value points;

[0062] As a preferred embodiment of the present invention, the lifting amount , where f´(t) is the expression of the current load curve, f(t) is the expression of the curve segment, t0 is the acquisition time corresponding to the starting point of the current load curve, t num is the collection time corresponding to the latest point of the current load curve;

[0063] As a preferred embodiment of the present invention, the process of adjusting the output power of the current base station to the predicted target power also includes:

[0064] The lowest power corresponding to the midpoint of the first interval of the load standard curve is obtained and recorded as the initial power of the base station; before reaching the first predicted adjustment time point, the base station uses the initial power as the output power.

[0065] A base station transmitter output power control system, characterized by comprising:

[0066] Power calibration module: set the signal strength threshold R, and record the minimum output power required for the signal strength received by the user to reach the signal strength threshold as the minimum power; obtain the user density load of the base station, and obtain the minimum power corresponding to the base station when it is under different user density loads, and generate the minimum power curve according to the minimum power corresponding to each user density load;

[0067] Adjustment preprocessing module: set a collection period, obtain the daily user density load of the base station in the collection period in real time, obtain the daily user density load curve, and obtain the load standard curve according to each user density load curve; obtain the maximum value point and the minimum value point of the load standard curve, and determine the rising interval and the falling interval of the load standard curve according to the maximum value point and the minimum value point; obtain the midpoint of the rising interval and the falling interval, and record it as the adjustment time point T;

[0068] Every two adjacent adjustment time points constitute an adjustment interval, obtain the maximum user density load of the load standard curve in the adjustment interval, and obtain the minimum output power corresponding to the maximum user density load according to the minimum power curve, which is recorded as the target power P of the adjustment interval; correspond each adjustment time point to the target power of the first adjustment interval after the adjustment time point;

[0069] Adjustment module: obtain the user density load of the current base station in real time, and generate the current load curve in real time; obtain the horizontal coordinates corresponding to the starting point and the latest point of the current load curve, obtain the collection interval, and obtain the curve segment corresponding to the collection interval on the load standard curve;

[0070] According to the current load curve and curve segment, the offset Oa and the rise and fall La of the current load curve are obtained in real time; then, on the current load curve, the next adjustment time point is corrected in real time to obtain the predicted adjustment time point T´=T+Oa, and the predicted target power P´=P+La corresponding to the predicted adjustment time point is obtained; every time the predicted adjustment time point is reached, the output power of the current base station is adjusted once to the predicted target power.

[0071] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for controlling the output power of a base station transmitter, characterized in that: The following steps are involved: Step S1: Set a signal strength threshold R, and record the minimum output power required for the signal strength received by the user to reach the signal strength threshold as the minimum power; obtain the user density load of the base station, and obtain the minimum power corresponding to the base station when it is under different user density loads, and generate a minimum power curve according to the minimum power corresponding to each user density load; Step S2: setting a collection period, obtaining the daily user density load of the base station in real time during the collection period, obtaining a daily user density load curve, and obtaining a load standard curve according to the average value of each point on each user density load curve; Obtain the maximum value point and the minimum value point of the load standard curve, and determine the rising interval and the falling interval of the load standard curve according to the maximum value point and the minimum value point; obtain the midpoint of the rising interval and the falling interval, and record it as the adjustment time point T; Every two adjacent adjustment time points constitute an adjustment interval, obtain the maximum user density load of the load standard curve in the adjustment interval, and obtain the minimum output power corresponding to the maximum user density load according to the minimum power curve, which is recorded as the target power P of the adjustment interval; correspond each adjustment time point to the target power of the first adjustment interval after the adjustment time point; Step S3: obtaining the user density load of the current base station in real time, and generating the current load curve in real time; obtaining the horizontal coordinates corresponding to the starting point and the latest point of the current load curve, obtaining the collection interval, and obtaining the curve segment corresponding to the collection interval on the load standard curve; According to the current load curve and curve segment, the offset Oa and the rise and fall La of the current load curve are obtained in real time; then, on the current load curve, the next adjustment time point is corrected in real time to obtain the predicted adjustment time point T´=T+Oa, and the predicted target power P´=P+La corresponding to the predicted adjustment time point is obtained; every time the predicted adjustment time point is reached, the output power of the current base station is adjusted once to the predicted target power.

2. A method for controlling base station transmitter output power according to claim 1, characterized in that: In step S1, the process of obtaining the user density load includes: Obtain the signal coverage area of ​​the base station, divide the signal coverage area into grids, and obtain a number of sub-areas; obtain the number of users n in the sub-area, and obtain the area S of the sub-area, and obtain the user density Ud=n / S of the sub-area; obtain the user density of each sub-area, select the maximum value of the user density, and record it as the user density load of the base station at this time.

3. A method for controlling base station transmitter output power according to claim 1, characterized in that: In step S2, the setting range of the collection period is [March, December].

4. A method for controlling base station transmitter output power according to claim 1, characterized in that: In step S2, obtaining the user density load curve includes: A collection time interval threshold is set, and every other collection time interval threshold is recorded as a collection moment. The user density load is obtained once at each collection moment, and the collection moment also includes 0 o'clock every day; a rectangular coordinate system is established with time as the horizontal coordinate and user density load as the vertical coordinate; the user density load corresponding to each collection moment is converted into a coordinate point of a corresponding position on the rectangular coordinate system, and each coordinate point is connected with a smooth curve, and the curve is recorded as a user density load curve.

5. A method for controlling base station transmitter output power according to claim 1, characterized in that: In step S2, the process of determining the ascending interval and the descending interval includes: The starting point, end point, maximum point and minimum point of the load standard curve are obtained, all of which are recorded as endpoints; the horizontal coordinates corresponding to the endpoints are obtained, which are recorded as nodes, and every two adjacent nodes constitute an interval, which is recorded as [T a , T b ]; If T in the interval a The end point corresponding to the load standard curve is the minimum point, and T b When the end point corresponding to the load standard curve is a maximum point or an end point, the interval is an ascending interval; if T a The end point corresponding to the load standard curve is the starting point, and T b When the end point corresponding to the load standard curve is a maximum point, the interval is an ascending interval; If T in the interval a The end point corresponding to the load standard curve is the maximum point, and T b When the endpoint corresponding to the load standard curve is a minimum point or an end point, the interval is a descending interval; if T a The end point corresponding to the load standard curve is the starting point, and T b When the end point corresponding to the load standard curve is a minimum point, the interval is a descending interval.

6. A method for controlling base station transmitter output power according to claim 1, characterized in that: In step S3, the process of obtaining the offset includes: Obtain all extreme points on the curve segment and number each extreme point; obtain the extreme point of the current load curve, record it as the current extreme point, and number each current extreme point; then obtain the offset , where Ep i Represents the i-th extreme point, Ep i ´ represents the i-th current extreme point, i∈[1,m] and i is a positive integer, and m is the total number of current extreme points.

7. A method for controlling output power of a base station transmitter according to claim 4, characterized in that: In step S3, the lifting amount , where f´(t) is the expression of the current load curve, f(t) is the expression of the curve segment, t0 is the acquisition time corresponding to the starting point of the current load curve, t num is the collection time corresponding to the latest point of the current load curve.

8. A method for controlling base station transmitter output power according to claim 5, characterized in that: In step S3, the process of adjusting the output power of the current base station to the predicted target power also includes: The lowest power corresponding to the midpoint of the first interval of the load standard curve is obtained and recorded as the initial power of the base station; before reaching the first predicted adjustment time point, the base station uses the initial power as the output power.

9. A base station transmitter output power control system, characterized in that: include: Power calibration module: set the signal strength threshold R, and record the minimum output power required for the signal strength received by the user to reach the signal strength threshold as the minimum power; obtain the user density load of the base station, and obtain the minimum power corresponding to the base station when it is under different user density loads, and generate the minimum power curve according to the minimum power corresponding to each user density load; Adjustment preprocessing module: set a collection period, obtain the daily user density load of the base station in the collection period in real time, obtain the daily user density load curve, and obtain the load standard curve according to each user density load curve; obtain the maximum value point and the minimum value point of the load standard curve, and determine the rising interval and the falling interval of the load standard curve according to the maximum value point and the minimum value point; obtain the midpoint of the rising interval and the falling interval, and record it as the adjustment time point T; Every two adjacent adjustment time points constitute an adjustment interval, obtain the maximum user density load of the load standard curve in the adjustment interval, and obtain the minimum output power corresponding to the maximum user density load according to the minimum power curve, which is recorded as the target power P of the adjustment interval; correspond each adjustment time point to the target power of the first adjustment interval after the adjustment time point; Adjustment module: obtain the user density load of the current base station in real time, and generate the current load curve in real time; obtain the horizontal coordinates corresponding to the starting point and the latest point of the current load curve, obtain the collection interval, and obtain the curve segment corresponding to the collection interval on the load standard curve; According to the current load curve and curve segment, the offset Oa and the rise and fall La of the current load curve are obtained in real time; then, on the current load curve, the next adjustment time point is corrected in real time to obtain the predicted adjustment time point T´=T+Oa, and the predicted target power P´=P+La corresponding to the predicted adjustment time point is obtained; every time the predicted adjustment time point is reached, the output power of the current base station is adjusted once to the predicted target power.

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