CN105430733B - A kind of method and device of power adjustment - Google Patents

Abstract

The invention discloses a power adjustment method, relates to the technical field of communication, can effectively guarantee the service quality of a macro cell, and simultaneously improves the service quality of a micro cell. The method provided by the present invention includes: the micro base station obtains the serving macro cell corresponding to the micro base station; obtains its own load and the load of the serving macro cell; if the load of the micro base station is greater than the lower limit of the micro base station load or the service If the load of the macro cell is greater than the lower limit of the load of the macro cell, the proportion of the first type of mobile users among all the users served by itself is obtained, and the proportion of the second type of mobile users among all the users served by each serving macro cell Ratio; if the proportion of the first type of mobile users is higher than the adjustment threshold or the proportion of the second type of mobile users is higher than the adjustment threshold, the power adjustment is performed based on the current transmission power of itself. The embodiment of the present invention is applicable to the process of base station power coordination.

Description

Method and device for adjusting power

technical field

The present invention relates to the field of communication technologies, in particular to a power adjustment method and device.

Background technique

With the uneven distribution of population density and the increasing differences in mobile service demands of users of different age groups and regions, the demand for mobile service bearing in different communities is "cold" and "hot". Business volume requirements also vary.

Therefore, micro base stations began to rapidly enter the construction of mobile networks. Micro base stations with different powers and shapes form a diversified networking scheme with macro base stations, or make up for blindness and weaknesses of macro base stations, and solve the problem of insufficient deep coverage of macro base stations; or absorb heat for macro base stations and improve the area Increase network capacity and improve user service experience. At present, all operators adopt the same-frequency networking method. The same-frequency interference between macro cells and micro cells will have a significant negative impact on the user network experience served by macro cells and micro cells. Since the power of the macro base station is generally not suitable for adjustment, the transmission power of the micro base station is dynamically adjusted to reduce the impact of co-channel interference to a certain extent.

The current dynamic power adjustment scheme for micro base stations is mainly to first set the expected SINR (Signal to Interference plus Noise Ratio) threshold of micro base station users, and configure Its own transmit power, so as to ensure that the SINR of all users served by the micro base station is higher than the SINR threshold, thereby ensuring the network experience of the served users. However, unreasonable SINR configuration and micro-cell power configuration may cause extremely strong interference to users of the macro base station, resulting in a low average SINR of macro cell service users and severely limited capacity of the macro cell.

Contents of the invention

Embodiments of the present invention provide a method and device for power adjustment, which can effectively ensure the service quality of a macro cell and simultaneously improve the service quality of a micro cell.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

An embodiment of the present invention provides a power adjustment method, including:

The micro base station acquires a serving macro cell corresponding to the micro base station;

The micro base station obtains its own load and the load of the serving macro cell;

If the load of the micro base station is greater than the lower limit of the load of the micro base station or the load of the serving macro cell is greater than the lower limit of the load of the macro cell, the micro base station obtains the proportion of the first type of mobile users among all users served by itself, and, The proportion of the second type of mobile users among all the users served by each of the serving macro cells, wherein the first type of mobile users is measured in the micro cell corresponding to the micro base station The signal strength difference between the serving macro cells is less than the interference threshold, and the second type of mobile user measures in the serving macro cell that the signal strength difference between the serving macro cell and the micro cell is less than the interference threshold ;

If the proportion of the first type of mobile users is higher than the adjustment threshold or the proportion of the second type of mobile users is higher than the adjustment threshold, the micro base station performs power adjustment based on its own current transmission power.

The embodiment of the present invention also provides a power adjustment device, including:

a first obtaining unit, configured to obtain a serving macro cell corresponding to the micro base station;

a second acquiring unit, configured to acquire its own load and the load of the serving macro cell;

The third acquisition unit is configured to acquire the proportion of the first type of mobile users among all users served by itself when the load of the micro base station is greater than the lower limit of the load of the micro base station or the load of the serving macro cell is greater than the lower limit of the load of the macro cell , and, the proportion of the second type of mobile users among all the users served by each of the serving macro cells, wherein the first type of mobile users measure the micro cell in the micro cell corresponding to the micro base station The signal strength difference between the serving macro cell and the serving macro cell is less than the interference threshold, and the second type of mobile user measures the signal strength difference between the serving macro cell and the micro cell in the serving macro cell less than the interference threshold;

The adjustment unit is configured to perform power adjustment based on its own current transmission power when the proportion of the first type of mobile users is higher than the adjustment threshold or the proportion of the second type of mobile users is higher than the adjustment threshold.

A method and device for power adjustment provided by the embodiments of the present invention perform power adjustment by analyzing load conditions of a micro base station and adjacent macro cells. It can fully unload the load of the macro station when the macro station needs it, improve the user's average rate experience and the overall capacity of the network, and also improve the service quality of the micro cell.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a flow chart of a power adjustment method provided by an embodiment of the present invention;

FIG. 2 is a flow chart of another power adjustment method provided by an embodiment of the present invention;

FIG. 3 is a flow chart of another power adjustment method provided by an embodiment of the present invention;

FIG. 4 is a block diagram of a power adjustment device provided by an embodiment of the present invention;

FIG. 5 is a block diagram of another power adjustment device provided by an embodiment of the present invention;

FIG. 6 is a block diagram of another power adjustment device provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The embodiment of the present invention provides a power adjustment method, which is suitable for a network structure with both micro base stations and macro base stations. The method is executed by micro base stations. The process is shown in Figure 1, including:

101. Acquire a serving macro cell corresponding to the micro base station.

In the embodiment of the present invention, the serving macro cell needs the micro base station to share load for the macro cell.

102. Obtain its own load and the load of the serving macro cell.

103. If the load of the micro base station is greater than the lower limit of the load of the micro base station or the load of the serving macro cell is greater than the lower limit of the load of the macro cell, obtain the proportion of the first type of mobile users among all users served by itself, and, each The proportion of the second type of mobile users among all the users served by the serving macro cells.

Wherein, the first type of mobile user measures in the micro cell corresponding to the micro base station that the signal strength difference between the micro cell and the serving macro cell is less than the interference threshold, and the second type of mobile user is in the It is measured in the serving macro cell that the signal strength difference between the serving macro cell and the micro cell is smaller than an interference threshold.

Among them, the interference threshold is a value, such as 2dB, etc., which should be set according to the operator's requirements for user service quality

The lower limit of the load is generally a small value, indicating that the load of the cell is at an extremely low level. It is different from the load threshold mentioned in the subsequent steps.

It is supplemented that if the loads of both the micro base station and the serving macro cell are lower than the lower load limit, for example, the RB utilization rates of the micro base station and the serving macro cell are both lower than 10%, which means that the number of users served by the two cells is small or The service rate of the user is low. In this case, even if there is some interference between the macro and micro cells, the impact on the user experience is small. After adjusting the power of the micro base station, the improvement of the user experience is very limited, so it is not necessary Make power adjustments.

104. If the proportion of the first type of mobile users is higher than the adjustment threshold or the proportion of the second type of mobile users is higher than the adjustment threshold, perform power adjustment based on the current transmission power of the user.

Wherein, the adjustment threshold is a percentage, such as 20%, which should be set in consideration of the operator's expectation of user service quality and the setting value of the interference threshold.

A power adjustment method provided by an embodiment of the present invention performs power adjustment by analyzing load conditions of a micro base station and adjacent macro cells. It can fully unload the load of the macro station when the macro station needs it, improve the user's average rate experience and the overall capacity of the network, and also improve the service quality of the micro cell.

In combination with the foregoing method flow, the embodiment of the present invention specifically provides a specific implementation manner of step 101 to obtain the serving macro cell corresponding to the micro base station, as shown in FIG. 2 , including:

201. Obtain the first number of feedback times for each neighboring cell ID from a mobile user served by itself.

The first feedback times and the subsequent second feedback times are statistical values, and the acquisition method is similar, and the user can measure the signal strength of the local area and the neighboring area, and feed back the measurement report to the base station. If the user is in a micro cell, the micro cell is used as the local area, and the adjacent macro cell is used as the neighboring cell to perform signal strength measurement, and the measurement report will carry the cell ID and signal strength of the macro cell. If the user is in the macro cell, the macro cell is used as the local area, and the adjacent micro cell is used as the neighboring cell to perform signal strength measurement, and the measurement report will carry the cell ID and signal strength of the micro cell. Therefore, the number of times of feedback is the number of times a specific cell ID appears in the measurement reports fed back by all users, which is the number of times of feedback of the cell ID.

202. Calculate a first proportion corresponding to each neighboring cell ID, where the first proportion is a proportion of the respective first feedback times corresponding to a single neighboring cell ID in the total feedback times of neighboring cell IDs.

203. Determine that the macro cell corresponding to the cell ID of the neighboring cell whose first proportion is higher than the preset threshold is a potential serving macro cell.

Wherein, the preset threshold is a configuration value, which can be set according to actual needs.

After step 203 is executed, the serving macro cell can also be determined directly according to the load of the current potential serving macro cell. For example, if the RB utilization rate is higher than 50%, the potential serving macro cell is determined to be the serving macro cell of the micro base station. . If there is no macro cell with particularly high load, step 204 may be continued.

204. Obtain a second feedback number corresponding to each potential serving macro cell, the second feedback number is a neighboring cell obtained when a mobile user in a single potential serving macro cell performs signal measurement with the micro base station as a neighboring cell Feedback times for ID.

205. Determine the sum of the second feedback times corresponding to each potential serving macro cell and the first feedback times corresponding to the respective cell IDs as the total feedback times of the potential serving macro cell.

206. Determine the potential serving macro cell with the largest total feedback times as the serving macro cell.

It should be added that in step 206, setting the potential serving macro cell with the largest total number of feedback times to be determined as the serving macro cell is only a feasible implementation solution, and the total number of feedback times can also be set to be significantly higher than those corresponding to other potential serving macro cells. The potential serving macro cell of the times sum is determined as the serving macro cell, for example, exceeds the times sum of other macro cells by more than 20%.

If the total feedback times of each potential serving macro cell is similar, the potential serving macro cell with the highest current load is directly determined as the serving macro cell.

Combining with the foregoing method flow, the embodiment of the present invention specifically provides a specific implementation method for step 104 to perform power adjustment based on its own current transmit power, as shown in FIG. 3 , including:

301. Determine the current power adjustment range.

Among them, the determination of the current power adjustment range can refer to the following situations, including:

If the load of the serving macro cell is higher than the load threshold, and the load of the micro base station is lower than the load threshold, then determine that the current power adjustment range is between the currently configured transmit power of the micro base station and the maximum transmit power.

If the load of the serving macro cell is lower than the load threshold and the load of the micro base station is higher than the load threshold, then determine that the current power adjustment range is between the minimum transmit power and the currently configured transmit power of the micro base station.

If the loads of the serving macro cell and the micro base station are both higher than the load threshold, determine that the current power adjustment range is between the minimum transmission power and the maximum transmission power.

Wherein, the load threshold is different from the aforementioned lower load limit, and generally needs to be higher than the aforementioned lower load limit.

302. Determine several assumed power configuration values according to the current power adjustment range.

Among them, it is assumed that the power configuration value can be determined by decreasing the maximum value in the current power adjustment range of the micro base station according to the power adjustable step size, minus 2 times the adjustable step size, and minus 3 times the adjustable step size until reaching The minimum value that can be configured by the Femtocell.

303. When the micro base station is configured with different assumed power configuration values, respectively calculate the proportion of the first type of mobile users among all the users served by the micro base station itself, and each of the serving macro cells serves The proportion of the second type of mobile users among all users of .

304. Determine a target transmit power according to a relationship between the ratio of the first type of mobile users, the ratio of the second type of mobile users, and the adjustment threshold.

Step 304 can be specifically implemented as:

If the power configuration value of a hypothetical micro base station can meet the proportion of the first type of mobile users and the proportion of the second type of mobile users is lower than the adjustment threshold, then the power configuration value is an available configuration value, and it can be used in all available configurations. Among the values, the maximum value is selected as the optimal power configuration value of the micro base station;

If there is no assumed power configuration value that satisfies both the proportion of the first type of mobile users and the proportion of the second type of mobile users lower than the adjustment threshold, but the proportion of the first type of mobile users and the proportion of the second type of mobile users If one of the ratios satisfies, take the other ratio closest to the adjustment threshold as the optimal configuration value. Similarly, if there are multiple hypothetical configuration values with the same degree of proximity, take the largest one as the optimal configuration value;

If the proportion of the first type of mobile users and the proportion of the second type of mobile users under all assumed configuration values are higher than the adjustment threshold, the optimal configuration value is the one with the smallest sum of the proportions calculated by the micro base station and the macro cell, similar to , if there are multiple hypothetical configuration values whose sums of proportions are equal, the largest one is taken as the optimal configuration value.

305. Adjust the current transmit power to the target transmit power.

It should be supplemented here that, in the above technical solutions, the micro base station acquires information about the proximity of the macro base station to adjust its own transmission power, so as to realize active sharing. In this embodiment of the present invention, the transmission power can also be adjusted according to the instructions of the macro base station. For example, the micro base station receives the load warning information sent by the surrounding macro base stations, and the micro base station can configure the transmission power according to the default value or gradually increase the transmission power according to the demand. To achieve passive sharing. When the Femtocell does not receive the alarm information, or receives the alarm clearing information, the aforementioned step 101 is executed.

The embodiment of the present invention also provides a power adjustment device, as shown in Figure 4, including:

The first obtaining unit 41 is configured to obtain a serving macro cell corresponding to the micro base station.

The second acquiring unit 42 is configured to acquire its own load and the load of the serving macro cell.

The third acquiring unit 43 is configured to acquire the occupancy of mobile users of the first type among all users served by the micro base station when the load of the micro base station is greater than the lower limit of the load of the micro base station or the load of the serving macro cell is greater than the lower limit of the load of the macro cell. ratio, and the proportion of the second type of mobile users among all the users served by each of the serving macro cells, wherein the first type of mobile users measured the micro cell in the micro cell corresponding to the micro base station The signal strength difference between the serving macro cell and the serving macro cell is less than the interference threshold, and the second type of mobile user measures the signal strength difference between the serving macro cell and the micro cell in the serving macro cell The value is less than the interference threshold.

The adjustment unit 44 is configured to perform power adjustment based on its own current transmission power when the proportion of the first type of mobile users is higher than the adjustment threshold or the proportion of the second type of mobile users is higher than the adjustment threshold.

Optionally, as shown in FIG. 5, the first acquiring unit 41 includes:

The first obtaining module 411 is configured to obtain the first feedback times of each neighboring cell ID from the mobile user served by itself.

The first calculation module 412 is configured to calculate the first proportion value corresponding to each neighboring cell ID, and the first proportion value is the first feedback corresponding to a single neighboring cell ID in the total feedback times of the neighboring cell ID The proportion of times.

The first determining module 413 is configured to determine that a macro cell corresponding to a neighbor cell ID whose first proportion is higher than a preset threshold is a potential serving macro cell.

The second acquisition module 414 is configured to acquire the second feedback times corresponding to each potential serving macro cell, the second feedback times is that a single mobile user in the potential serving macro cell uses the micro base station as a neighboring cell to perform signal The number of times the neighbor cell ID is fed back during measurement.

The second determination module 415 is configured to respectively determine the sum of the second feedback times corresponding to each potential serving macro cell and the first feedback times corresponding to the respective cell IDs as the total feedback times of the potential serving macro cells.

The third determining module 416 is configured to determine the potential serving macro cell with the largest total feedback times as the serving macro cell.

Optionally, as shown in FIG. 6, the adjustment unit 44 includes:

The fourth determination module 441 is configured to determine the current power adjustment range.

The fifth determination module 442 is configured to determine several assumed power configuration values according to the current power adjustment range.

The second calculation module 443 is configured to separately calculate the proportion of mobile users of the first type among all users served by the micro base station itself when the micro base station is configured with different assumed power configuration values, and each of the The proportion of the second type of mobile users among all the users served by the respective serving macro cells.

The sixth determination module 444 is configured to determine the target transmission power according to the relationship between the ratio of the first type of mobile users, the ratio of the second type of mobile users, and the adjustment threshold.

An adjustment module 445, configured to adjust the current transmit power to the target transmit power.

Optionally, the fourth determination module 441 is specifically configured to determine that the current power adjustment range is from the currently configured transmit power of the micro station to Between the maximum transmit power; when the load of the serving macro cell is lower than the load threshold, and the load of the micro base station is higher than the load threshold, determine that the current power adjustment range is between the minimum transmit power and the currently configured transmit power of the micro station; in the When the loads of the serving macro cell and the micro base station are both higher than the load threshold, it is determined that the current power adjustment range is between the minimum transmission power and the maximum transmission power.

An apparatus for power adjustment provided by an embodiment of the present invention performs power adjustment by analyzing load conditions of a micro base station and adjacent macro cells. It can fully unload the load of the macro station when the macro station needs it, improve the user's average rate experience and the overall capacity of the network, and also improve the service quality of the micro cell.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be realized by means of software plus necessary general-purpose hardware, and of course also by hardware, but in many cases the former is a better embodiment . Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a computer floppy disk , a hard disk or an optical disk, etc., including several instructions for enabling a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (6)

1. a kind of method of power adjustment, which is characterized in that including：

Micro-base station obtains serving macro-cell corresponding with the micro-base station；

The micro-base station obtains the load of the load and the serving macro-cell of itself；

If the load of the micro-base station is more than micro-base station load lower limit or the load of the serving macro-cell is loaded more than macrocell Lower limit, then the micro-base station obtain the accounting value of the first kind mobile subscriber in all users of own services, and, Mei Gesuo State the accounting value of the second class mobile subscriber in all users that serving macro-cell respectively services, wherein the first kind movement is used Family measures the difference in signal strength between the Microcell and the serving macro-cell in the corresponding Microcell of the micro-base station Value be less than interference threshold, the second class mobile subscriber measured in the serving macro-cell serving macro-cell with it is described Signal strength difference between Microcell is less than interference threshold；

If the accounting value of first kind mobile subscriber is higher than adjustment thresholding higher than the accounting value of adjustment thresholding or the second class mobile subscriber, Then the micro-base station carries out power adjustment based on itself current transmission power, including：Determine current power adjusting range；

The power adjustment is ranging from：

If the serving macro-cell load is higher than load-threshold, and micro-base station load is less than load-threshold, it is determined that current work( Rate adjusting range is that micro- station is currently configured transmission power between maximum transmission power；

If the serving macro-cell load is less than load-threshold, and micro-base station load is higher than load-threshold, it is determined that current work( Rate adjusting range is that minimum emissive power is currently configured to micro- station between transmission power；

If the serving macro-cell and micro-base station load are above load-threshold, it is determined that current power adjusting range be it is described most Small transmission power is between the maximum transmission power.

2. according to the method described in claim 1, it is characterized in that, described obtain serving macro-cell corresponding with the micro-base station Including：

The micro-base station obtains first Times of Feedback of the mobile subscriber to each adjacent area cell ID of own services；

The micro-base station calculates the corresponding first accounting values of each adjacent area cell ID, and the first accounting value is in adjacent area cell ID Total Times of Feedback in single corresponding first Times of Feedback of adjacent area cell ID accounting value；

The micro-base station determines that the first accounting value is macro for potential service higher than the corresponding macrocells of adjacent area cell ID of pre-determined threshold Cell；

The micro-base station obtains corresponding second Times of Feedback in each potential serving macro-cell, and second Times of Feedback is single Mobile subscriber in the potential serving macro-cell obtains adjacent area cell ID when carrying out signal measurement as adjacent area using the micro-base station Times of Feedback；

The micro-base station respectively will corresponding second Times of Feedback in each potential serving macro-cell corresponding with respective cell ID the The sum of one Times of Feedback is determined as total Times of Feedback of potential serving macro-cell；

The maximum potential serving macro-cell of total Times of Feedback is determined as serving macro-cell by the micro-base station.

3. according to the method described in claim 1, it is characterized in that, described carry out power based on itself current transmission power Adjustment includes：

The micro-base station determines that several assume power configuration value according to current power adjusting range；

The micro-base station is calculated separately when the micro-base station is configured to different hypothesis power configuration values, the micro-base station from The accounting value of first kind mobile subscriber in all users of body service, and, the institute that each serving macro-cell respectively services There is the accounting value of the second class mobile subscriber in user；

The micro-base station is according to the accounting value of the first kind mobile subscriber, the accounting value of the second class mobile subscriber and the adjustment The magnitude relationship of thresholding determines objective emission power；

The micro-base station adjusts current transmission power to objective emission power.

4. a kind of device of power adjustment, which is characterized in that including：

First acquisition unit, for obtaining serving macro-cell corresponding with micro-base station；

Second acquisition unit, the load of load and the serving macro-cell for obtaining itself；

Third acquiring unit, for being more than the negative of micro-base station load lower limit or the serving macro-cell in the load of the micro-base station When carrying more than macrocell load lower limit, the accounting value of the first kind mobile subscriber in all users of own services is obtained, and, The accounting value of second class mobile subscriber in all users that each serving macro-cell respectively services, wherein the first kind Mobile subscriber measures the signal between the Microcell and the serving macro-cell in the corresponding Microcell of the micro-base station Strength difference is less than interference threshold, and the second class mobile subscriber measures the serving macro-cell in the serving macro-cell Signal strength difference between the Microcell is less than interference threshold；

Adjustment unit, for the accounting value in first kind mobile subscriber higher than adjustment thresholding or the accounting value of the second class mobile subscriber When higher than adjustment thresholding, power adjustment is carried out based on itself current transmission power；

The adjustment unit includes the 4th determining module, and the 4th determining module is specifically used for loading in the serving macro-cell Higher than load-threshold, and micro-base station loads when being less than load-threshold, determines that current power adjusting range is currently configured for micro- station Transmission power is between maximum transmission power；

In the serving macro-cell, load is less than load-threshold, and micro-base station loads when being higher than load-threshold, determines current work( Rate adjusting range is that minimum emissive power is currently configured to micro- station between transmission power；

When the serving macro-cell and micro-base station load are above load-threshold, determine current power adjusting range for described in most Small transmission power is between the maximum transmission power.

5. device according to claim 4, which is characterized in that the first acquisition unit includes：

First acquisition module, first Times of Feedback of the mobile subscriber to each adjacent area cell ID for obtaining own services；

First computing module, for calculating the corresponding first accounting values of each adjacent area cell ID, the first accounting value is in neighbour The accounting value of corresponding first Times of Feedback of single adjacent area cell ID in total Times of Feedback of area cell ID；

First determining module is potential for determining the first accounting value higher than the corresponding macrocells of adjacent area cell ID of pre-determined threshold Serving macro-cell；

Second acquisition module, for obtaining corresponding second Times of Feedback in each potential serving macro-cell, second feedback time Number carries out obtaining neighbour when signal measurement by adjacent area of the micro-base station for the mobile subscriber in the single potential serving macro-cell The Times of Feedback of area cell ID；

Second determining module, for respectively by ID pairs of each corresponding second Times of Feedback in potential serving macro-cell and respective cell The sum of first Times of Feedback answered is determined as total Times of Feedback of potential serving macro-cell；

Third determining module, for the maximum potential serving macro-cell of total Times of Feedback to be determined as serving macro-cell.

6. device according to claim 4, which is characterized in that the adjustment unit further includes：

5th determining module, for according to current power adjusting range, determining that several assume power configuration value；

Second computing module, for calculating separately when the micro-base station is configured to different hypothesis power configuration values, described The accounting value of first kind mobile subscriber in all users of micro-base station own services, and, each serving macro-cell is respectively The accounting value of second class mobile subscriber in all users of service；

6th determining module, for according to the accounting value of the first kind mobile subscriber, the accounting value of the second class mobile subscriber with The magnitude relationship of the adjustment thresholding, determines objective emission power；

Module is adjusted, for adjusting current transmission power to objective emission power.