WO2012092748A1

WO2012092748A1 - Method and system for controlling uplink transmission power of terminal

Info

Publication number: WO2012092748A1
Application number: PCT/CN2011/074893
Authority: WO
Inventors: 刘锟; 鲁照华; 罗薇; 李卫敏; 肖华华
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-01-05
Filing date: 2011-05-30
Publication date: 2012-07-12
Also published as: CN102595582A; CN102595582B

Abstract

The invention discloses a method and system for controlling uplink transmission power of a terminal. The method is applied to a system comprising multiple adjacent base stations, which includes that: the terminal reports the information of each interfering base station that interferes uplink data transmission to a serving base station; the serving base station obtains uplink propagation path loss values between each interfering base station and the terminal according to the received information of each interfering base station, calculates the uplink transmission power of the terminal according to the accumulation of the uplink propagation path loss values and the predetermined Interference over Thermal (IOT) control factor of the current base station, and configures the terminal. Another method includes that: the terminal reports the downlink signal to interference plus noise ratio (SINR) and the propagation path loss value between the serving base station and the terminal that are measured by the current terminal to the serving base station; the serving base station considers the uplink transmission power of the terminal as the accumulation of the received downlink SINR, the propagation path loss value and the predetermined IOT control factor of the current base station, and configures the terminal.

Description

Method and system for controlling uplink transmission power of terminal

Technical field

The present invention relates to the field of communications, and in particular, to a method and system for controlling uplink transmit power of a terminal.

Background technique

Inter-cell interference is an inherent problem in cellular mobile communication systems, which seriously affects the capacity of the system. The reason for this is that users using the same frequency resources in each cell will interfere with each other.

As shown in FIG. 1, BS (Base Station) 1 and BS2 are serving base stations of MS (Mobile Station, Terminal) 1 and MS2, respectively, and it is assumed that the set of subcarriers allocated for uplink transmission by BS1 is SCI, BS2. The set of subcarriers allocated for MS2 for uplink transmission is SC2, and the intersection of SC1 and SC2 is SC. If the SC is not an empty set, when receiving the uplink signal sent by the MS2, the BS2 also receives the wireless signal sent by the MS1 through the subcarriers in the set SC. For MS2 and BS2, these signals from MS1 are uplink interference. If the distance between MS1 and MS2 is small, if both MS1 and MS2 are in the overlapping part of the coverage area of the two serving cells, the uplink interference between the cells will be very strong, and even BS2 cannot correctly demodulate the MS2. The upstream signal coming.

Summary of the invention

The technical problem to be solved by the present invention is to provide a method and system for controlling uplink transmission power of a terminal to overcome uplink interference defects between existing neighboring cells.

To solve the above problem, the present invention provides a method for controlling uplink transmit power of a terminal, which is applied to a system including multiple neighboring base stations, including:

The terminal reports the information of the interfering base stations that interfere with the uplink data transmission to the serving base station; the serving base station acquires the uplink propagation path between the interfering base stations and the terminal according to the received information of the interfering base stations. a loss value, and then calculating the terminal according to the sum of the uplink propagation path loss value and a preset interference/noise ratio control factor in the serving base station The uplink transmit power is configured and configured to the terminal.

Optional,

And calculating an uplink transmit power of the terminal according to the sum of the uplink propagation path loss value and a preset interference/noise ratio control factor in the serving base station, where the formula is as follows: i3⁄4 = U 101og ₁₀ ( t )

i=\

Wherein, the uplink transmit power of the terminal is in dBm;

^ is the interference noise ratio control factor, in dB;

The corpse is an uplink propagation path loss value between the terminal and the first interfering base station; and I is the number of interfering base stations reported by the terminal.

Optional,

The interfering base station is a neighboring base station whose downlink signal attenuation strength indication information with the terminal is greater than a preset strength threshold;

The downlink signal attenuation strength indication information includes: any one or any combination of the received signal strength indication information of the downlink signal, the downlink signal and the interference and noise ratio, the downlink signal and the interference ratio, and the downlink propagation path loss value.

Optionally, the foregoing method further includes:

Each base station in the system reports the interference strength of the uplink of the base station to the upper layer network unit at intervals;

The upper network unit collects an average value of interference strengths received by each base station in the system, and if it is determined that an absolute value of a difference between the average value and a preset target interference level value is greater than a preset value, the average value is When the target interference level is greater than the preset target, the base station is notified to reduce the transmit power of each terminal under the base station; when the average value is less than the preset target interference level, the base station is notified to improve The transmission power of each terminal under the base station.

Optionally, the foregoing method further includes:

If the upper layer network unit determines that the absolute value of the difference between the mean value and the preset target interference level value is less than or equal to the preset value, determining the interference intensity received by each base station When the distribution is not uniform, a notification message is sent to each of the base stations to indicate that each base station controls uplink interference received by the base station by adjusting uplink transmit power of the corresponding terminal;

After receiving the notification message, each base station re-adjusts the transmit power of the terminal in the base station. Optional,

The upper layer network unit determines that the distribution of interference strengths received by the base stations is uneven, and includes:

The upper layer network unit determines that the variance value of the interference strength received by each base station is greater than a preset variance value; or, the upper layer network unit determines the maximum interference strength of the interference strength values received by the base stations. The difference between the value and the minimum interference intensity value is greater than a predetermined difference.

Optional,

The information of each interfering base station that is reported by the terminal to the serving base station includes the identification information of each interfering base station;

The notification message carries identification information of a base station that has the highest interference strength in the uplink in the system;

After receiving the notification message, each of the base stations re-adjusts the transmit power of the terminal in the base station, including:

After receiving the notification message, each base station determines that the uplink transmit power of the terminal is reduced if it is determined that the identifier information of the interfering base station reported by the terminal to the local base station is consistent with the identifier information carried in the notification message.

Optional,

The notification message carries the identification information of the base station with the least interference strength in the uplink in the system;

After receiving the notification message, each base station determines that there is interference reported by the terminal to the base station. The identifier information of the base station is consistent with the identifier information carried in the notification message, and the uplink transmit power of the terminal is increased.

The present invention also provides a method for controlling uplink transmit power of a terminal, which is applied to a system including a plurality of neighboring base stations having the same transmit power, including:

The terminal reports the downlink signal and the interference-to-noise ratio and the propagation path loss value measured by the terminal to the serving base station to the serving base station;

And the serving base station configures, as the uplink transmit power of the terminal, the sum of the received downlink signal and the interference-to-noise ratio, the propagation path loss value, and the preset interference-to-noise ratio control factor in the serving base station. Said terminal. Optionally, the foregoing method further includes:

Each base station in the system reports the interference strength of the base station on the uplink to the upper layer network unit at intervals;

Optionally, the foregoing method further includes:

If the upper layer network unit determines that the absolute value of the difference between the mean value and the preset target interference level value is less than or equal to the preset value, determining that the interference intensity of the base stations is not distributed Sending a notification message to each of the base stations to indicate that each base station controls uplink interference received by the base station by adjusting uplink transmit power of the corresponding terminal;

The upper layer network unit determines that the distribution of interference strengths received by the base stations is uneven, including:

The upper layer network unit determines that the variance value of the interference strength received by each base station is greater than a preset variance value; or, the upper layer network unit determines that the interference strength values received by the base stations are The difference between the maximum interference intensity value and the minimum interference intensity value is greater than a predetermined difference value.

Optional,

And determining, by the terminal, the identifier information of each of the interfering base stations to the serving base station when determining that the uplink interference is received from the interfering base station;

Optional,

After receiving the notification message, each of the base stations improves the uplink transmit power of the terminal if it is determined that the identifier information of the interfering base station reported by the terminal to the local base station is consistent with the identifier information carried in the notification message.

Optional,

The downlink signal attenuation strength indication information includes: any one or any combination of the received signal strength indication information of the downlink signal, the signal to interference and noise ratio, the signal to interference ratio, and the propagation path loss value. The present invention also provides a system for controlling uplink transmit power of a terminal, comprising: a plurality of neighboring base stations and a terminal that selects a base station as a serving base station:

The terminal is configured to report information of each interfering base station that interferes with the uplink data transmission to the serving base station;

The serving base station is configured to: obtain an uplink propagation path loss value between each interfering base station and the terminal according to the received information of each interfering base station, and then according to the accumulated sum of the uplink propagation path loss values The preset interference-to-noise ratio control factor in the serving base station calculates an uplink transmit power of the terminal and is configured to the terminal.

Optional,

The serving base station is configured to calculate an uplink transmit power of the terminal according to an accumulation of the uplink propagation path loss value and a preset interference/noise ratio control factor in the serving base station according to the following formula:

Wherein, the uplink transmit power of the terminal is in dBm;

The interference noise ratio control factor, in dB;

The corpse is an uplink propagation path loss value between the terminal and the first interfering base station;

I is the number of interfering base stations reported by the terminal.

Optionally, the system further includes: an upper network unit;

Each base station in the system is configured to: (c) the interference strength received by the uplink of the base station to the upper network unit at intervals;

The upper network unit is configured to: calculate an average value of interference strengths received by each base station in the system, and if it is determined that an absolute value of a difference between the average value and a preset target interference level value is greater than a preset value, When the average value is greater than the preset target interference level value, the base station is notified to reduce the transmit power of each terminal under the base station; when the average value is less than the preset target interference level value, the Each base station increases the transmission power of each terminal under the base station.

Optional, The upper layer network unit is further configured to: if it is determined that an absolute value of a difference between the mean value and the preset target interference level value is less than or equal to the preset value, determine an interference strength received by each base station When the distribution is not uniform, a notification message is sent to each of the base stations to indicate that each base station controls uplink interference received by the base station by adjusting uplink transmit power of the corresponding terminal;

Each of the base stations is further configured to: after receiving the notification message, re-adjust the transmit power of the terminal in the base station.

Optional,

The upper layer network unit is configured to determine that the distribution of interference strengths received by the base stations is uneven in the following manner:

Determining that the variance value of the interference strength received by each base station is greater than a preset variance value; or determining the difference between the maximum interference intensity value and the minimum interference intensity value of the interference strength values received by each base station Greater than a preset difference.

Optional,

The terminal is further configured to: carry the identifier information of each interfering base station in the information of each interfering base station that is reported to the serving base station;

The base station is configured to re-adjust the transmit power of the terminal in the base station in the following manner: if it is determined that the identifier information of the interfering base station reported by the terminal to the local base station is consistent with the identifier information carried in the notification message, Reduce the uplink transmit power of the terminal.

Optional,

Each of the base stations is configured to readjust the transmit power of the terminal in the base station in the following manner: If it is determined that the identification information of the "4" base station of the base station is the same as the identifier information carried in the notification message, the uplink transmission power of the terminal is increased.

The present invention also provides a system for controlling uplink transmit power of a terminal, comprising: a plurality of neighboring base stations and a terminal that selects a base station as a serving base station:

The terminal is configured to report the downlink signal and the interference noise ratio and the propagation path loss value measured by the terminal to the serving base station to the serving base station;

The serving base station is configured to: use the sum of the received downlink signal and interference noise ratio, the propagation path loss value, and a preset interference/noise ratio control factor in the serving base station as the uplink transmit power of the terminal, Configured to the terminal.

Optionally, the foregoing system further includes an upper network unit;

The base stations in the system are set to: report the interference strength received by the base station on the uplink to the upper layer network unit at intervals;

The upper layer network unit is configured to: calculate an average value of interference strength received by each base station in the system, and if it is determined that an absolute value of a difference between the average value and a preset target interference level value is greater than a preset value, And when the average value is greater than the preset target interference level value, notifying the base stations to reduce the transmit power of each terminal under the base station; when the average value is less than the preset target interference level value, notify Each of the base stations increases the transmit power of each terminal under the base station.

Optional,

The upper layer network unit is further configured to: if it is determined that the absolute value of the difference between the mean value and the preset target interference level value is less than or equal to the preset value, determine the interference received by each base station When the distribution of the strength is not uniform, the notification message is sent to each of the base stations to indicate that each base station controls the uplink interference received by the base station by adjusting the uplink transmit power of the corresponding terminal;

Optional,

Determining that the variance value of the interference strength received by each base station is greater than a preset variance value; or It is determined that the difference between the maximum interference intensity value and the minimum interference intensity value of the interference intensity values received by the base stations is greater than a preset difference value.

Optional,

The terminal is further configured to: report the identifier information of each interfering base station to the serving base station when determining that the uplink interference is received from the interfering base station;

Each of the base stations is configured to re-adjust the transmission power of the terminal in the base station in the following manner: if it is determined that the terminal has the identification information of the "base station" of the base station and the identifier information carried in the notification message Consistently, the uplink transmit power of the terminal is reduced.

Optional,

Each of the base stations is configured to re-adjust the transmission power of the terminal in the base station in the following manner: if it is determined that the terminal has the identification information of the "base station" of the base station and the identifier information carried in the notification message Consistently, the uplink transmit power of the terminal is increased.

After the invention is used, the uplink transmit power of the terminal can be flexibly adjusted according to the change of the cell load, the IoT change between cells can be effectively controlled, and the interference intensity between cells can be reduced. BRIEF abstract

1 is a schematic diagram of an interference formation principle of an inter-cell uplink in a mobile communication system; FIG. 2 is a schematic diagram of an interference formation principle of an inter-cell downlink in a mobile communication system; FIG. 3 is a flow chart of a method for controlling uplink transmission power of a terminal in an embodiment of the present invention; Figure

4 is a topological structural diagram of a mobile communication system according to Embodiments 1 to 5 of the present invention; Intention. Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

In order to overcome the uplink interference between neighboring cells, multiple neighboring base stations may jointly perform uplink transmit power control on the terminals in the served cell, and control the transmit power of the terminals in each cell to reduce the uplink between adjacent cells. Interference intensity.

In the following, a base station communicating with a terminal is referred to as a serving base station; an upper layer network unit is a functional module of any network entity or network entity capable of data interaction with the base station, and the upper layer network unit can simultaneously perform data interaction with multiple adjacent base stations .

In this embodiment, a method for controlling uplink transmit power of a terminal is provided. The method is applied to a system that includes multiple neighboring base stations and an upper layer network unit that communicates with the multiple neighboring base stations. As shown in FIG. 3, the method includes:

Step 10: The terminal determines, according to the measured downlink signal attenuation strength indication information between the neighboring base stations, the interference base station that may cause interference to the uplink transmission, and reports the information of the interference base station to the serving base station;

The downlink signal attenuation strength indication information may be at least one of the following: RSSI (Received Signal Strength Indication), SINR (Signal to Interference plus Noise Ratio), SIR (SIR (Signal to Interference plus Noise Ratio)) Signal to Interference Ratio, PathLoss, and the information is obtained by the terminal by measuring the downlink signals sent by the neighboring base stations;

Preferably, the terminal may only use the neighboring base station whose downlink signal attenuation strength indication information is greater than the preset strength threshold as the interference base station. In addition, the signal attenuation strength indication information of each interfering base station may be reported to the serving base station. The strength threshold may be configured by a standard default, or sent by the serving base station to the terminal through a downlink channel, or sent by the upper network unit to the terminal via the serving base station;

Step 20: The serving base station calculates an uplink transmit power of the terminal, and performs the uplink transmit function. Rate configuration to the above terminal;

The formula for calculating the uplink transmit power of the terminal used by the serving base station is as follows:

PT _X ^L = K 1OT ₊ 101og ₁₀ (t ) + AW ( i ) i=l

Wherein, the uplink transmit power of the terminal is in dBm;

. ^ is the IoT (Interference over Thermal) control factor, which is a parameter related to the base station. The value of the multiple neighboring base stations in the system may be the same or different, and the value is notified to the service by the upper layer network unit. Base station, in dB;

PL is the value of the uplink propagation path loss between the terminal and the interfering base station, and the linear value is used. The value can be obtained by the serving base station by measurement, or when the uplink and downlink links between the serving base station and the terminal are symmetric, the serving base station will directly or indirectly obtain the downlink propagation path loss according to the downlink signal attenuation strength indication information of each interfering base station reported by the terminal. The value is used as an uplink propagation path loss value corresponding to each interfering base station;

/ the number of identification information of the interfering base station reported by the terminal;

APow is the adjustment amount of the transmit power corresponding to the terminal. The initial configuration by the serving base station is in dB, and the initial value can be set to 0 dB.

Preferably, when the transmit power of each of the interfering base stations and the serving base station is the same, and the uplink and downlink propagation path loss values between the terminal and the serving base station are substantially equal, the serving base station may calculate the uplink transmission of the terminal according to the following formula:

= K _IoT + SINR _DL + PL ^DL + APower ( 2 ) where ^/^? ^ is the downlink signal to interference and noise ratio between the terminal and the serving base station, in dB;

The corpse ^Di is the downlink propagation path loss value between the terminal and the serving base station, in dB; the definition of other parameters is as described above, and will not be described here.

Step 30: Each base station in the system measures the interference strength of the base station on the uplink at a time interval, and reports the interference strength to the upper layer network unit.

The interference strength of the base station on the uplink can be measured by IoT, and the calculation method of ΙοΤ (3)

KN, where: /o3⁄4 represents the interference-to-noise ratio of the base station on the subcarrier; Nfc represents the uplink noise power received by the base station on the subcarrier; 4 represents the uplink interference power received by the base station on the subcarrier; K is all in the base station The number of available subcarriers.

Step 40: The upper network unit counts the average value of the uplink interference strength reported by each base station in the system, and then compares the average value with the preset target interference level value, and if it is determined that the absolute value of the difference between the two is less than or equal to a preset If the value is, go to step 50; otherwise, perform step 70; wherein, the target interference level value may be configured by a standard default, or may be dynamically adjusted by the upper layer network unit according to system performance;

Step 50: The upper network unit calculates the variance value of the uplink interference strength reported by each base station in the system. If it is determined that the variance value is less than or equal to a preset variance value, step 20 is performed again; otherwise, the foregoing base stations respectively Sending a notification message, which is used to indicate that each base station controls uplink interference received by the base station by adjusting uplink transmit power of the corresponding terminal;

The preset variance value may be a fixed value, or may be set according to the absolute value of the difference between the average value of the uplink interference intensity and the target interference level value, that is, the larger the absolute value, the preset variance value. The bigger, and vice versa.

In addition, in this step, the upper layer network unit can also use the IoT strength reported by each base station to calculate the maximum difference of the IoT distribution ^ ^! ^ -^! ^ , if < d _th , no further adjustment of each terminal is needed. The transmit power adjustment amount APow is re-executed in step 20; otherwise, the transmit power adjustment amount Δ^^^ of each terminal needs to be further adjusted, and a notification message is sent to each of the base stations to indicate that each base station controls the base station by adjusting the uplink transmit power of the corresponding terminal. Upstream interference. among them, /. r _mflX is the largest IoT value of the IoT strength reported by each base station. For _mn is the smallest IoT value of the IoT strength reported by each base station. It can be configured by default or configured by the system.

Step 60: After receiving the notification message, each base station correspondingly modifies the transmission power adjustment amount of the terminal in the base station, and performs step 20 again; When modifying the transmit power adjustment amount of the terminal in the base station, at least one of the following methods may be used:

Method 1: The base station reduces the transmit power of the terminal in the base station that may generate strong interference to the base station that is subjected to the largest IoT;

The notification message sent by the upper layer network unit received by the base station carries the largest in the system.

Identification information of the base station of the IoT; if the base station determines that the identifier information of the base station that receives the maximum IoT in the identifier information of the interfering base station reported by the terminal in the base station in step 10, the ower value corresponding to the terminal is lowered, and then the steps are performed. 20. The reduced step size is PowerDownStep, and the reduced step value may be configured by a standard default, or configured by the base station or sent by the upper layer network unit to notify the base station. If the base station determines that the identity information of the interfering base station reported by the terminal in the base station in step 10 does not include the identity information of the base station that receives the largest IoT, the base station ends.

Method 2: The base station increases the transmit power of the terminal in the base station that may generate strong interference to the base station that is subjected to the minimum IoT;

The notification message sent by the upper-layer network unit received by the base station carries the identifier information of the base station that receives the smallest IoT in the system; if the base station determines that the identifier information of the interfering base station reported by the terminal in the base station in step 10 contains the foregoing After the identifier information of the base station of the minimum IoT is increased, step 20 is performed after the value corresponding to the terminal is increased, and the step size is increased by a PowerUpStep, and the increased step value may be configured by a standard default, or configured by the base station or by The upper layer network unit sends a message to notify the base station; if the base station determines that the identity information of the interfering base station reported by the terminal in the base station in step 10 does not include the identifier information of the base station that receives the minimum IoT, the base station ends.

Step 70: If the upper network unit determines that the average value is less than the preset target interference level value, increase the IoT control factor value of each base station in the system; otherwise, reduce the IoT control factor value of each base station in the system;

Step 80: Send the adjusted IoT control factor value to each corresponding base station, and perform step 20 again.

In addition, in this embodiment, a system for controlling uplink transmit power of a terminal includes: a plurality of neighboring base stations and a terminal that selects a base station as a serving base station:

The terminal is configured to report information of each interfering base station that interferes with the uplink data transmission to the service. Base station

And the serving base station is configured to obtain an uplink propagation path loss value between each interfering base station and the terminal according to the received information of each interfering base station, and then according to the accumulated sum of the uplink propagation path loss values Determining an interference/noise ratio control factor in the serving base station, calculating an uplink transmit power of the terminal, and configuring the terminal to the terminal.

More preferably,

The serving base station calculates an uplink transmit power of the terminal according to an accumulation of the uplink propagation path loss value and a preset interference/noise ratio control factor in the serving base station, and the following formula is used:

i=\

Wherein, the uplink transmit power of the terminal is in dBm;

^ is the interference noise ratio control factor, in dB;

I is the number of interfering base stations reported by the terminal.

Preferably, the system may further include: an upper network unit

Each base station in the system is configured to report the interference strength received by the uplink of the base station to the upper layer network unit at intervals;

The upper layer network unit is configured to collect an average value of interference strengths received by each base station in the system, and if it is determined that an absolute value of a difference between the average value and a preset target interference level value is greater than a preset value, When the average value is greater than the preset target interference level value, the base station is notified to reduce the transmit power of each terminal under the base station; and when the average value is less than the preset target interference level value, notify each The base station increases the transmission power of each terminal under the base station.

Preferably, when the absolute value of the value difference is less than or equal to the preset value, when further determining that the distribution of the interference strength received by each base station is uneven, respectively sending a notification message to each of the base stations, where Instruct each The base station controls the uplink interference received by the base station by adjusting the uplink transmit power of the corresponding terminal. The base stations are further configured to: after receiving the notification message, re-adjust the transmit power of the terminal in the base station.

More preferably,

The upper layer network unit is configured to determine that the distribution of interference strengths received by the base stations is uneven, including:

The upper layer network unit is configured to determine that the variance value of the interference strength received by each base station is greater than a preset variance value; or, the upper layer network unit is configured to determine, in the interference strength value received by each base station, The difference between the maximum interference intensity value and the minimum interference intensity value is greater than a predetermined difference value.

More preferably,

The terminal is further configured to include identifier information of each of the interfering base stations in information about each interfering base station that is reported to the serving base station;

The base station is further configured to: after receiving the notification message, re-adjust the transmit power of the terminal in the base station, including:

The base station is further configured to: after receiving the notification message, if it is determined that the identifier information of the interfering base station reported by the terminal to the local base station is consistent with the identifier information carried in the notification message, the uplink transmission of the terminal is decreased. power.

More preferably,

The base station is further configured to: after receiving the notification message, if it is determined that the terminal is located on the base station If the identifier information of the reported interfering base station is consistent with the identifier information carried in the notification message, the uplink transmit power of the terminal is increased.

In another embodiment, a system for controlling uplink transmit power of a terminal includes: a plurality of neighboring base stations and a terminal that selects a base station as a serving base station:

The terminal is configured to report the downlink signal and the interference-to-noise ratio and the propagation path loss value measured by the terminal to the serving base station to the serving base station;

The serving base station is configured to configure, as the uplink transmit power of the terminal, the sum of the received downlink signal and interference noise ratio, the propagation path loss value, and the preset interference/noise ratio control factor in the serving base station. To the terminal.

Preferably, the system may further comprise an upper network element:

Each base station in the system is configured to report the interference strength received by the base station on the uplink to the upper layer network unit at intervals;

Preferably, if the absolute value of the difference is less than or equal to the preset value, when further determining that the distribution of the interference strength received by each base station is uneven, respectively sending a notification message to each of the base stations for indicating Each base station controls uplink interference received by the base station by adjusting uplink transmit power of the corresponding terminal;

The base stations are further configured to: after receiving the notification message, re-adjust the transmit power of the terminal in the base station.

More preferably,

The upper network unit is configured to determine that the variance value of the interference strength received by each base station is greater than Or a predetermined variance value; or, the upper network unit is configured to determine that a difference between a maximum interference intensity value and a minimum interference intensity value of the interference intensity values received by each base station is greater than a preset difference value.

More preferably,

The terminal is further configured to report the identifier information of each interfering base station to the serving base station when determining that the uplink interference is received from the interfering base station;

The base station is configured to: after receiving the notification message, re-adjust the transmit power of the terminal in the base station, including:

The base station is configured to: after receiving the notification message, if it is determined that the identifier information of the base station of the base station reported by the terminal to the local base station is consistent with the identifier information carried in the notification message, the uplink of the terminal is decreased. Transmit power.

More preferably,

The base station is configured to: after receiving the notification message, if it is determined that the identifier information of the interfering base station reported by the terminal to the local base station is consistent with the identifier information carried in the notification message, the uplink transmit power of the terminal is increased. .

Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Features of the embodiments of the invention and the embodiments may be combined with each other if they do not conflict.

Application example one

As shown in FIG. 4, a mobile communication system includes seven base stations BS1-BS7, each of which is under the base station. There is a terminal that communicates with the base station, that is, MS1-MS7, and the BSC is an upper layer network unit, and can perform data interaction with the base stations BS1-BS7.

The following is a specific implementation method of the uplink power control algorithm based on the multi-base station joint control IoT proposed by the present invention, which includes the following steps:

1. The MS4 obtains the downlink attenuation reference signal (the signal used for downlink synchronization and downlink channel estimation) transmitted by the BS4 to obtain the signal attenuation strength indication information _RSSIBS4MS4 with the BS4. SINR^ _4MS4 . SIR^, 73⁄4 _{0 S4} Any one or any combination of them. Among them, RSSI (Received Signal Strength Indication) is the received signal strength indication information), SINR (Signal to Interference plus Noise Ratio) is the signal to interference and noise ratio, SIR (Signal to Interference Ratio) is the signal to interference ratio), and PathLoss is Propagation path loss value.

2. The MS4 measures the signal attenuation strength indication information RSS/ _MS4 between the neighboring base stations, where the value of i is 1, 2, 3, 5, 6, 7;

MS4 calculates ΔΛ^/ _; = RSSI _{BSi MS4} - RSSI _{BS4 MS4} , when i _{t is} greater than a predetermined threshold ΔΛ3⁄47 _ί3⁄4 , BSi is considered to be a strong interfering base station of MS4. In this embodiment, H does not have MS4 calculated to determine that BS3 and BS6 are strong 4th base stations of MS4. And MS4 calculates the propagation path loss between BS3 and BS6 by formula (5) /^ /z ^ ₃ ^ ₄ ,

PathLoss _{BS6 MSA}

PathLoss _{BSi MS4} = RSSI _{BSi MS4} -RSSI _{BS4 MS4} + PathLoss _{BS4 MS4} ( 5 ) 3. MS4 will obtain the signal attenuation strength indication information and i^/z ^ ₄ between BS4 and

PathLoss _{BS6 MS4} information is sent to BS4 through the uplink channel;

4. The BS4 determines the transmit power of the MS4 according to the formula (6), and sends the transmit power configuration information of the MS4 to the MS4 through the downlink channel;

In this embodiment, BS4 directly calculated MS4 transmit power / ¾ ^ ₄ via a downlink channel to the MS4, MS4 transmit power according to the modulation and coding scheme should be determined by calculation or look-up table using the configuration information. Pr _x ^L MSr = ^K ioT, BSR + 10 l. g ₁₀ (∑ PathLoss BSj, MS ) + ^ ^0Wer MSi ( 6 ) where ₄ is the transmit power of MS4 in dBm;

O _{T 4} is an IoT control factor, and the BSC notifies the base station BS4 in dB;

PathL _{OSSBS] MS4} is the value of the uplink propagation loss between the terminal MS4 and the interfering base station BSj, which is a linear value;

J is a set consisting of indexes of interfering base stations;

APowr _MS4 is the adjustment of the MS4 transmit power, configured by the base station, in dB, with an initial value of 0 dB.

In this embodiment, assuming that the initial value of K _{!0T BS4} is -110 and the initial value of APower is OdB, MS4 determines the transmission power as g^ ₄ by the formula (6).

5. BS4 measures the interference strength IoT4 received by the uplink and sends it to the BSC;

6. The BSC uses the arithmetic mean method to calculate the average IoT intensity for received by BS1-BS7 and uses for^ with a preset target interference level value /. For comparison, if the absolute value of the difference is less than or equal to the preset value, go to step 9; otherwise, go to step 7;

7. The BSC adjusts each base station according to formula (7), where i=l, 2 7. = K _{I0T BSi} + A _t [dB] T _avg < / ₀

= K _{I0T BSi} - A dB] T _avg > / ₀ ( ⁷ ) where △ can be a fixed value and can be based on fo and /. The absolute value of the difference is set. The larger the absolute value, the larger the Δ and vice versa.

8. The BSC will update each base station. ^ values are sent to each corresponding base station, and then step 4 is performed;

9. The BSC determines whether the transmit power AP ₀₁ ^r _M& . of each terminal needs to be further adjusted according to the variance C7 of the IoT distribution reported by each base station, where i=l, 2 7;

When it is necessary to further adjust the ΔΡ corresponding to each terminal. Μ^ _μλ . When performing step 10; otherwise, perform step 4. In this application example, the BSC obtains the variance σ of the ΙοΤ distribution according to the IoT strength reported by each base station. If σ ≤ σ, there is no need to further adjust the corresponding

APower _MSi ; Otherwise, the ΔΡ corresponding to each terminal needs to be further adjusted. Μ^ _μλ .. Where σ _ί/? is the preset threshold, which can be configured by standard default or by the system.

The BSC can also use the following method to determine whether it is necessary to further adjust the transmit power of each terminal.

ΔΡο

The BSC IoT strength reported by the respective base stations, the maximum difference obtained by calculating IoT distribution D ^{^{_{^{= | 07 ma X - 07 min}}}} |, if ≤, then no further adjustment corresponding to the respective terminals

APower _MSi ; Otherwise, you need to further adjust the APoim^. corresponding to each terminal. Where /OJ _mflX is the largest IoT value in the reported IoT intensity, and /^ is the smallest IoT value in the reported IoT intensity, which can be configured by standard default or by the system.

10. Taking BS4 as an example, if BS4 is the base station with the largest IoT, the BSC sends a notification message carrying the identification information of BS4 to all base stations, and requires all terminals that may generate strong interference to BS4 to reduce the transmission power;

After receiving the notification message sent by the BSC, each base station determines, according to the identification information of the interfering base station reported by the terminal in the service range, that the terminal reporting the identification information of the BS4 lowers the corresponding value, and the reduced step is PowerDownStep, and then executes. Step 4;

The PowerDownStep may be configured by a standard default, or may be configured by the base station or sent by the BSC to notify the base station.

Application Example 2 As shown in FIG. 4, a mobile communication system includes seven base stations BS1-BS7, and one terminal under each base station communicates with the base station, that is, MS1-MS7, and the BSC is an upper layer network unit, and can be connected with the base station BS1- BS7 performs data interaction.

1 MS4 measures the downlink reference signal sent by BS4 (used for downlink synchronization and advancement) A signal for downlink channel estimation is obtained), and any one or any combination of signal attenuation strength indication information RSSI, SINR^ _4MS4 , SIR^, 73⁄4 _{0 S4} with BS4 is obtained. Among them, RSSI (Received Signal Strength Indication) is the received signal strength indication information), SINR (Signal to Interference plus Noise Ratio) is the signal to interference and noise ratio, SIR (Signal to Interference Ratio) is the signal to interference ratio), and PathLoss is Propagation path loss value.

2. The MS4 measures the signal attenuation strength indication information RSS/ _MS4 between the neighboring base stations, where the values of i are 1, 2, 3, 5, 6, 7.

MS4 calculates MSS = RSSI _{BSi MS4} -RSSI _{BS4 MS4} , and when i _{t is} greater than a predetermined threshold ΔΛ3⁄47 _ί3⁄4 , BSi is considered to be the interfering base station of MS4. In this embodiment, H does not have MS4 calculated to determine that BS3 and BS6 are strong 4th base stations of MS4. And MS4 calculates the propagation path loss between BS3 and BS6 by formula (5) /^ /z ^ ₃ ^ ₄ ,

PathLoss _{BS6 MS}

PathLoss _{BSi MS4} = RSSI _{BSi MS4} -RSSI _{BS4 MS4} + PathLoss _{BS4 MS4} ( 5 )

3. The MS4 will obtain the signal attenuation strength indication information and the / _3⁄4 ₀ „ ₄ , PathLoss _{BS6 MS4} information transmitted to the BS4 through the uplink channel;

4. BS4 determines the transmit power of MS4 according to formula (6), and sends the transmit power configuration information of MS4 to MS4 through the downlink channel.

In the present example, BS4 directly calculated MS4 transmit power / ¾ ^ ₄ via a downlink channel to the MS4, MS4 look-up table or by calculating the configuration information should be used to determine transmission power according to the modulation coding scheme.

Pr _x ^L MSr = ^K ioT, BSR + 10 l. g ₁₀ (∑ PathLoss BSjMS where ₄ is the transmission power of ^«4, in dBm;

K

For the IoT control factor, the BSC informs the base station BS4, in dB;

PathL _{OSSBSi MS4} is the value of the uplink propagation loss between the terminal MS4 and the interfering base station BSj. Is a linear value;

J is a set consisting of indexes of interfering base stations;

In this embodiment, it is assumed that the initial value of K _{!0T BS4} is -110, and the initial value of APower is OdB.

MS4 determines the transmit power as P by equation (6).

7. The BSC adjusts each base station according to formula (7), where i=l, 2 7.

K _Si = K _IOT , _BSi + A dB] When IoT < A3⁄4

K _IOT , _BSi = K _{IOT BSi} - A dB] When IoT > Α3⁄4 ( 7 ) where △ can be a fixed value, which can be based on fo and /. The absolute value of the difference is set. The larger the absolute value, the larger the Δ and vice versa.

8. The BSC sends the updated ^^^ value of each base station to each corresponding base station, and then performs step 4;

When it is necessary to further adjust the corresponding transmission power ΔΡ Μ^ _{μλ of} each terminal, step 10 is performed; otherwise, step 4 is performed.

In this application example, the BSC obtains the variance ^{σ of the} IoT distribution according to the IoT strength reported by each base station. If ^ ^Γ ≤ ^ ^Γ , there is no need to further adjust the corresponding

APower _MSi , perform step 4; otherwise, you need to further adjust the ΔΡ Μ^ _μλ corresponding to each terminal. Where σ _ί3⁄4 is the preset threshold and can be configured by standard default configuration or by the system. The BSC can also use the following method to determine whether it is necessary to further adjust the transmit power of each terminal.

ΔΡο The BSC IoT strength reported by the respective base stations, by calculating the difference between the maximum distribution = ^{ά ΙοΤ}

For example, if d≤d _th , there is no need to further adjust the APower _MSi corresponding to each terminal; otherwise, it is necessary to further adjust the A?or _MS corresponding to each terminal. Where /oJ _max is the largest IoT value in the reported IoT strength, /. ^ Strength is reported IoT IoT value the smallest, d _th may be configured or configured by default by the unified standard.

10. Taking BS4 as an example, if BS4 is the base station with the smallest IoT, the BSC sends a notification message carrying the identification information of BS4 to all base stations, and requires all terminals that may interfere with BS4 to increase the transmission power;

After receiving the notification message sent by the BSC, each base station determines, according to the identification information of the base station reported by the terminal in the service range, that the terminal of the "3⁄4 BS4 identification information increases the corresponding APower value, and the step size is increased. For PowerUpStep, then go to step 4.

The PowerUpStep may be configured by a standard default configuration, or may be configured by the base station or sent by the BSC to notify the base station.

Application example three

As shown in FIG. 4, a mobile communication system includes seven base stations BS1-BS7, and one terminal under each base station communicates with the base station, that is, MS1-MS7, and the BSC is an upper layer network unit, and can perform data with the base stations BS1-BS7. Interaction.

2. The signal attenuation strength indication information RSS/ ¹ B _S SiM _3⁄4m 4 between the MS4 measurement and other neighboring base stations, The value of i is 1, 2, 3, 5, 6, 7.

MS4 calculates MSS = RSSI _{BSi MS4} -RSSI _{BS4 MS4} , and when i _{t is} greater than a predetermined threshold ΔΛ3⁄47 _ί3⁄4 , BSi is considered to be the interfering base station of MS4.

In this embodiment, the MS and the MS4 are determined to determine that the BS3 and the BS6 are MS4 strong base stations. 3. MS4 will obtain the signal attenuation strength indication information with BS4 and send it to BS4 through the uplink channel;

In this embodiment, BS4 directly calculated MS4 transmit power / ¾ ^ ₄ via a downlink channel to the MS4, MS4 transmit power according to the modulation and coding scheme should be determined by calculation or look-up table using the configuration information.

⁼ K _I0T , BS4 + SINR _BS4MS4 + PathLoss _BSAMSA + APower _MS4 ( 6 ) where ₄ is the transmit power of MS4 in dBm;

. ^ ₄ is the IoT control factor of BS4, and the base station BS4 is notified by the BSC, in dB;

PatK is the downlink propagation loss value between BS4 and MS4, in dB; SINR _B ^D _S ^L _4MS4 is the downlink SINR value between BS4 and MS4;

In this embodiment, it is assumed that the initial value of _{B 4} is -110 and the initial value of APower is OdB.

MS4 determines the transmit power as P by equation (6).

7. The BSC adjusts the _{OT B3⁄4 of} each base station according to formula (7), where i=l, 2 7. K _IOT , _BSi = K _IOT , _BSi + A dB] When IoT < A3⁄4

K _IOT , _BSi = K _{IOT BSi} - A dB] When IoT g > A3⁄4 ( ⁷ ) where △ can be a fixed value, which can be based on fo and /. The absolute value of the difference is set. The larger the absolute value, the larger the Δ and vice versa.

8 BSC sends the updated ^ ^ ^ value of each base station to each corresponding base station, and then performs step 4;

9 The BSC will judge whether it is necessary to further adjust the _ΔΡ ₀₁ ^Γ _{各个 of} each terminal according to the variance C7 of the IoT distribution reported by each base station, where i=l 2 7 ;

When it is necessary to further adjust the ΔΡ of each terminal. Μ^ _μλ . When performing step 10; otherwise, perform step 4

APower _MSi , go to step 4; otherwise, you need to further adjust the ΔΡ corresponding to each terminal. Μ^ _μλ .. Where σ _ί3⁄4 is the preset threshold and can be configured by standard default configuration or by the system.

ΔΡο

According to the IoT strength reported by each base station, the BSC obtains the maximum difference of the IoT distribution by calculation. d = ΙΙοΤ^— IoT If ≤d _th , there is no need to further adjust the corresponding

APower _MSi ; Otherwise, you need to further adjust the A?or _{MS of} each terminal. Where /oJ _max is the largest IoT value in the reported IoT strength, /. ^ Strength is reported IoT IoT value the smallest, d _th may be configured or configured by default by the unified standard.

10. Taking BS4 as an example, if BS4 is the base station with the largest IoT, the BSC sends a notification message carrying the identification information of BS4 to all base stations, and requires all terminals that may interfere with BS4 to reduce the transmission power;

After receiving the notification message sent by the BSC, each base station determines, according to the identification information of the interfering base station reported by the terminal in the service range, that the terminal reporting the identification information of the BS4 lowers the corresponding ower, and the reduced step is PowerDownStep, and then performs Step 4; The PowerDownStep may be configured by a standard default, or may be configured by the base station or sent by the BSC to notify the base station.

Application example four

2. The MS4 measures the signal attenuation strength indication information RSS/ _MS4 between the neighboring base stations, where i has values of 1, 2, 3, 5, 6, and 7.

MS4 calculates MSS = RSSI _{BSi MS4} -RSSI _{BS4 MS4} , and when i _{t is} greater than a predetermined threshold ΔΛ3⁄47 _ί3⁄4 , BSi is considered to be the interfering base station of MS4. In this embodiment, H does not have MS4 calculated to determine that BS3 and BS6 are strong 4th base stations of MS4.

3. MS4 will obtain the signal attenuation strength indication information with BS4 and send it to BS4 through the uplink channel;

In this example, BS4 directly sends the calculated transmit power of MS4/ _3⁄4 ^ ₄ to the MS4 through the downlink channel, and MS4 determines the transmit power that should be used by looking up the table or calculating according to the modulation and coding mode. Configuration information.

^^^ ₄ is the IoT control factor of BS4, and the BSC notifies the base station BS4 in dB; 3⁄4t ^ ₄ is the downlink propagation loss value between BS4 and MS4, in dB;

SINR _B ^D _S ^L _4MS4 is the downlink SINR value between BS4 and MS4;

7. The BSC adjusts the ^^ of each base station according to formula (7).

'K _Si = K _IOT , _BSi + A dB] When IoT < A3⁄4

K _IOT = K _{IOT BSi} - A dB] When IoT > Α3⁄4 (7) where △ can be a fixed value, which can be based on fo and /. The absolute value of the difference is set. The larger the absolute value, the larger the Δ and vice versa.

9. The BSC will determine whether it is necessary to further adjust the _ΔΡ ₀₁ ^Γ _{各个 of} each terminal according to the variance C7 of the IoT distribution reported by each base station, where i=l, 2 7;

When it is necessary to further adjust the ΔΡ of each terminal. Μ^ _μλ . Then, go to step 10; otherwise, go to step 4.

In this application example, the BSC obtains IoT by calculation according to the IoT strength reported by each base station. The variance of the distribution σ, if σ ≤ σ, there is no need to further adjust the transmission power of each terminal

APower _MSi , go to step 4; otherwise, you need to further adjust the ΔΡ corresponding to each terminal. Μ^ _μλ .. The preset threshold value can be configured by the standard default configuration or by the system.

ΔΡο

B According to the IoT intensity reported by each base station, the maximum difference ^d ΤοΤ distribution is calculated by ^d =

- ^l0T min \ , as d ≤ d _th , no further adjustment of each terminal is required

After receiving the notification message sent by the BSC, each base station determines, according to the identification information of the interfering base station reported by the terminal in the service range, the terminal that reports the identification information of the BS4 to increase the corresponding ower, the step size is increased to PowerDownStep, and then the steps are performed. 4;

Application example five

As shown in application example 1, application example 2, application example 3, and application example 4, in step 9, when the BSC determines that it is not necessary to adjust _ΔΡ ₀₁ ^Γ _{各个 of} each terminal, the following steps may also be performed:

The BSC calculates the performance indicators of the entire network and determines the further adjustment method of /ο. The specific adjustment method is shown in Equation 9.

IoT _th = IoT _th + A _IoT [dB] . T _n needs to be increased

< IoT _th = IoT _th -A _IoT [dB] When / ₀ needs to be reduced (9)

IoT _th = IoT _th when / ₀ remains unchanged Where Δ _Μ denotes /. The step size of change is determined by the BSC.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

Industrial Applicability After the present invention, the uplink transmission power of the terminal can be flexibly adjusted according to the change of the cell load, the IoT variation between cells can be effectively controlled, and the interference intensity between cells can be reduced.

Claims

Claim

A method for controlling uplink transmit power of a terminal, which is applied to a system including multiple neighboring base stations, including:

The terminal reports the information of the interfering base stations that interfere with the uplink data transmission to the serving base station; the serving base station acquires the uplink propagation path between the interfering base stations and the terminal according to the received information of the interfering base stations. The loss value is then calculated according to the sum of the uplink propagation path loss value and the preset interference-to-noise ratio control factor in the serving base station, and configured to the terminal.

2. The method of claim 1 wherein:

And calculating, according to the sum of the uplink propagation path loss value and the preset interference/noise ratio control factor in the serving base station, an uplink transmit power of the terminal, where the formula is as follows:

Wherein, the uplink transmit power of the terminal is in units of dBm;

^ is the interference noise ratio control factor, in dB;

PL is an uplink propagation path loss value between the terminal and the first interfering base station;

I is the number of interfering base stations reported by the terminal.

3. The method of claim 1 wherein:

The method according to any one of claims 1 to 3, the method further comprising: reporting, by the base stations in the system, the interference strength received by the uplink of the base station to the upper layer network unit at intervals;

The upper layer network unit collects an average value of interference strengths received by each base station in the system, if And the absolute value of the difference between the average value and the preset target interference level value is greater than a preset value, and when the average value is greater than the preset target interference level value, the base station is notified to lower the base station. The transmit power of each terminal under the base station is notified to increase the transmit power of each terminal under the base station when the average value is smaller than the preset target interference level value.

5. The method of claim 4, the method further comprising:

After receiving the notification message, each base station re-adjusts the transmit power of the terminal in the base station.

6. The method of claim 5, wherein:

7. The method of claim 5 or 6, wherein:

8. The method of claim 5 or 6, wherein: The information of each interfering base station that is reported by the terminal to the serving base station includes the identifier information of each interfering base station;

A method for controlling uplink transmit power of a terminal, which is applied to a system comprising a plurality of neighboring base stations having the same transmit power, comprising:

And the serving base station configures, as the uplink transmit power of the terminal, the sum of the received downlink signal and the interference-to-noise ratio, the propagation path loss value, and the preset interference-to-noise ratio control factor in the serving base station. Said terminal.

10. The method of claim 9, the method further comprising:

11. The method of claim 10, the method further comprising:

If the upper layer network unit determines that the absolute value of the difference between the mean value and the preset target interference level value is less than or equal to the preset value, determining that the interference intensity of the base stations is not distributed When both are hooked, a notification message is sent to each of the base stations to indicate that each base station adjusts The uplink transmission power of the corresponding terminal controls the uplink interference received by the base station;

12. The method of claim 11 wherein:

13. The method of claim 11 wherein:

14. The method of claim 11 wherein:

After receiving the notification message, each base station determines that the identifier information of the interfering base station reported by the terminal to the local base station is consistent with the identifier information carried in the notification message, Line transmit power.

15. The method of claim 13 or 14, wherein:

The downlink signal attenuation strength indication information includes: any one or any combination of a received signal strength indication information of a downlink signal, a signal to interference and noise ratio, a signal to interference ratio, and a propagation path loss value.

16. A system for controlling uplink transmit power of a terminal, comprising: a plurality of neighboring base stations and a terminal selected as a base station of the serving base station:

17. The system of claim 16 wherein:

The serving base station is configured to calculate an uplink transmit power of the terminal according to an accumulating sum of the uplink propagation path loss value and a preset interference/noise ratio control factor in the serving base station according to the following formula: i3⁄4 = U 101 _O g ₁₀ ( )

i=\

Wherein, the uplink transmit power of the terminal is in dBm;

^ is the interference noise ratio control factor, in dB;

I is the number of interfering base stations reported by the terminal.

The system of any one of claims 16 or 17, the system further comprising: an upper network unit; The base stations in the system are set to: report the interference strength received by the uplink of the base station to the upper layer network unit at intervals;

19. The system of claim 18, wherein:

The upper layer network unit is further configured to: if it is determined that an absolute value of a difference between the mean value and the preset target interference level value is less than or equal to the preset value, determine an interference strength received by each base station When the distribution is not uniform, a notification message is sent to each of the base stations to indicate that each base station controls uplink interference received by the base station by adjusting uplink transmit power of the corresponding terminal;

20. The system of claim 19, wherein:

21. The system of claim 19 or 20, wherein:

Each of the base stations is configured to re-adjust the transmission power of the terminal in the base station in the following manner: if it is determined that the terminal has the identification information of the "base station" of the base station and the notification message to the base station If the carried identifier information is consistent, the uplink transmit power of the terminal is reduced.

22. The system of claim 19 or 20, wherein:

A system for controlling uplink transmit power of a terminal, comprising: a plurality of neighboring base stations and a terminal selected as a base station of the serving base station:

The system of claim 23, the system further includes an upper layer network unit; each base station in the system is configured to: report the interference strength received by the base station on the uplink to the upper layer network unit at intervals;

25. The system of claim 24, wherein:

The upper layer network unit is further configured to: if it is determined that the absolute value of the difference between the mean value and the preset target interference level value is less than or equal to the preset value, determining, by the each base station, When the distribution of the interference strength is not uniform, the notification message is sent to each of the base stations to indicate that each base station controls the uplink interference received by the base station by adjusting the uplink transmit power of the corresponding terminal;

26. The system of claim 25, wherein:

27. The system of claim 25, wherein:

28. The system of claim 25, wherein:

The base station is configured to re-adjust the transmit power of the terminal in the base station in the following manner: if it is determined that the identifier information of the interfering base station reported by the terminal to the local base station is consistent with the identifier information carried in the notification message, The uplink transmit power of the terminal.