WO2017063483A1

WO2017063483A1 - Method and apparatus for controlling uplink transmit power

Info

Publication number: WO2017063483A1
Application number: PCT/CN2016/099534
Authority: WO
Inventors: 詹建明; 梁昌裕; 殷登国; 陈友坚
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-10-16
Filing date: 2016-09-21
Publication date: 2017-04-20
Also published as: CN106604380A

Abstract

Disclosed is a method for controlling an uplink transmit power. The method comprises the following steps: A, filtering uplink measurement signal changes of a cell of a base station; and B, adjusting the uplink transmit power of a UE according to uplink signal quality after filtering. Also disclosed is an apparatus for controlling an uplink transmit power. In the present invention, in the mixed networking of a macro cell and a low-power cell that are in a same frequency, when violent fluctuation occurs on uplink signals, uplink measurement signal changes of a cell of a base station are filtered, and the uplink transmit power of a UE is adjusted according to uplink signal quality after filtering, thereby avoiding violent fluctuation of signals for users, improving uplink service experience of the users, and increasing the uplink performance and capacity of a heterogeneous network system.

Description

Uplink transmission power control method and device

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to an uplink transmission power control method and apparatus.

Background technique

UMTS (Universal Mobile Telecommunications System) is one of the global 3G standards developed by the International Organization for Standardization (3GPP). Its main body includes a series of technical specifications and interface protocols such as CDMA (Code Division Multiple Access) access network and packetized core network.

When the inventor of the present invention implements the present invention, it is found that the problem of uplink interference is often encountered in the current UMTS heterogeneous network. In the case of a hybrid network of the same frequency of the macro cell and the low power cell, the uplink and downlink links are unbalanced, resulting in no The user in the balance zone has a large uplink interference to the cell base station. In particular, in the case of a fast fading of an uplink signal that occurs during the user's movement, such as Rayleigh fading, the uplink signal fluctuates drastically. If the uplink power of the user is adjusted only according to the change of the uplink signal, the uplink service performance of the user may be degraded.

Summary of the invention

The technical problem to be solved by the present invention is to provide an uplink transmission power control method and apparatus, which are used to solve the problem that the uplink signal is fluctuated due to the uplink signal in the case of the hybrid network of the same frequency macro cell and low power cell. The problem of the decline in uplink business performance.

To solve the above technical problem, the present invention provides an uplink transmission power control method, and the method includes the following steps:

A. Filtering the uplink measurement signal change of the base station cell;

B. Adjust the uplink transmit power of the UE (User Equipment) according to the filtered uplink signal quality.

The step A includes: filtering an uplink measurement signal change of a low power base station cell or a macro base station cell.

In the step A, the infinite-length impulse response filtering method is used to filter the uplink measurement signal change, which specifically includes:

Filtering the change of the uplink measurement signal according to the formula F _n = (1 - α) × F _n-1 + α × M _n , where:

F _n is a value of an uplink signal in the n-time filter; F. _N-1 is the value of time filtered uplink signal quality n-1; n and n-1 time difference temporal granularity the uplink measurement signal reporting intervals determined; M _n is Upstream signal measurement at time n; α = (1/2) ^(k/2) , where k is the filter coefficient and k ≥ 0.

In the step B, the UE adjusts the transmit power parameter of the UE according to the filtered uplink signal quality F _n , and adjusts the adjusted transmit power parameter by using RRC (Radio Resource Control, Radio Resource Control Protocol) air interface signaling. Sending to the UE to adjust the uplink transmit power; the transmit power parameter includes the transmit power parameter β _{ec of the} E-DPC (E-DCH Dedicated Physical Control Channel, E-DCH (Enhanced Dedicated Channel) dedicated physical control channel) The transmit power parameter β _{ed of the} E-DPDCH (E-DCH Dedicated Physical Data Channel) and/or the transmit power parameter β _{d of the} DPDCH (Dedicated Physical Data Channel);

The transmit power parameter is obtained by the following formula:

(β _ec ) _n =(β _ec ) _n-1 +F _n -A;

(β _ed ) _n =(β _ed ) _n-1 +F _n -B;

(β _d ) _n =(β _d ) _n-1 +F _n -C;

Where Fn is the value filtered by the upstream signal quality n; A, B, C are constants greater than or equal to zero.

The step A includes: filtering a difference between an uplink measurement signal of a macro cell and a low power base station cell.

F _n is a value of n-time filtering of a difference between a macro cell and a low-power base station cell uplink measurement signal; and F _n-1 is a value filtered by n-1 time of a difference between the macro cell and the low-power base station cell uplink measurement signal; n and n-1 time to report the particle size difference between the uplink time interval measurement signal is determined; M _n is an uplink signal measurement time ^{n; α = (1/2) (k} / 2), where k is a filter coefficient, and K≥0.

In the step B, the method includes: adjusting the transmit power parameter of the UE according to the difference-filtered uplink signal quality _Fn , and transmitting the adjusted transmit power parameter to the UE to adjust the uplink transmit power by using RRC air interface signaling. The transmit power parameter includes a transmit power parameter β _{ec of the} E-DPCCH, a transmit power parameter β _{ed of the} E-DPDCH, and/or a transmit power parameter β _{d of the} DPDCH;

The transmit power parameter is obtained by the following formula:

(β _ec ) _n =(β _ec ) _n-1 +F _n -A;

(β _ed ) _n =(β _ed ) _n-1 +F _n -B;

(β _d ) _n =(β _d ) _n-1 +F _n -C;

Where Fn is the value of the n-time filtering of the difference between the macro cell and the low-power base station cell uplink measurement signal; A, B, and C are constants greater than or equal to zero.

The step A includes: filtering uplink measurement signal changes of the low power base station cell and the macro base station cell respectively.

F _n represents a value uplink signal quality time n filter, F _n is n value obtained at time F _mn or n timing values F _sn the low-power base station cell uplink measurement signal is filtered after the macro base station cell uplink measurement signal filtering; F _n-1 Indicates the value of the uplink signal quality n-1 time filtering, F _n-1 is the filtered value of the macro base station cell uplink measurement signal at time n-1, F _m(n-1) or n-1 time low power base station cell uplink measurement signal The filtered value F _s(n-1) ; the time granularity of the difference between n and n-1 is determined by the interval of the uplink measurement signal reporting; Mn is the measured value of the uplink signal at time n; α = (1/2) ^{(k /2)} where k is the filter coefficient and k ≥ 0.

The step B includes: adjusting the transmit power parameter of the UE according to the filtered difference F _dn of the uplink measurement signal of the macro base station cell and the low power base station cell, and adjusting the adjusted transmit power parameter by using RRC air interface signaling. And transmitting, to the UE, an uplink transmit power, where the transmit power parameter includes a transmit power parameter β _{ec of the} E-DPCCH, a transmit power parameter β _{ed of the} E-DPDCH, and/or a transmit power parameter β _{d of the} DPDCH;

The transmit power parameter is obtained by the following formula:

(β _ec ) _n =(β _ec ) _n-1 +F _nd -A;

(β _ed ) _n =(β _ed ) _n-1 +F _nd -B;

(β _d ) _n =(β _d ) _n-1 +F _nd -C;

F _dn =F _mn -F _sn ;

Where F _dn is the difference of the uplink measurement signal filtered by the macro base station cell and the low power base station cell at time n; F _mn is the filtered value of the macro base station cell uplink measurement signal at time n; F _sn is the low power base station cell uplink at time n The filtered signal is measured; A, B, and C are constants greater than or equal to zero.

Between the step A and the step B, the method further includes: determining whether the absolute value of the difference of the uplink signal quality filter values at the adjacent time reaches a preset threshold, and if yes, proceeding to step B; if not, ending .

The uplink measurement signal includes an SIR (Signal to Interference Ratio), an RSCP (Received Signal Code Power), and an Up BER (Bit Error Rate) of the uplink dedicated pilot.

The present invention also provides an uplink transmission power control apparatus, the apparatus comprising:

a filtering module, configured to filter an uplink measurement signal change of the base station cell;

The power adjustment module is configured to adjust the uplink transmit power of the UE according to the filtered uplink signal quality.

The apparatus further includes a determining module configured to compare the absolute value of the difference between the uplink signal quality filter values at the adjacent time and a preset threshold to determine whether to adjust the uplink transmit power of the UE.

The beneficial effects of the present invention are as follows:

In the case of the hybrid network of the same-frequency macro cell and the low-power cell, the uplink signal measurement of the base station cell is filtered when the uplink signal is violently fluctuating, and the uplink transmission of the UE is performed according to the filtered uplink signal quality. The power is adjusted to avoid drastic changes in the uplink signal of the user, improve the uplink service experience of the user, and increase the uplink performance capacity of the heterogeneous network system.

DRAWINGS

1 is a system structural diagram of a UMTS heterogeneous network according to an embodiment of the present invention;

2 is a flowchart of an uplink transmit power control method according to an embodiment of the present invention;

FIG. 3 is a structural diagram of an uplink transmission power control apparatus according to an embodiment of the present invention.

detailed description

In order to solve the problem that the upstream service performance of the user is degraded due to the violent fluctuation of the uplink signal in the case of the hybrid network of the same-frequency macro cell and the low-power cell, the present invention provides an uplink transmission power control method and The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The application environment of the following embodiments of the present invention takes a system of a UMTS heterogeneous network as an example. The structure of the system is shown in FIG. 1 , and the system adopts a hybrid network of a macro cell and a low power cell of the same frequency, where The UE is in an unbalanced band of the cell, and the macro cell and the low-power cell can send data to the RNC (Radio Network Controller), and the RNC can send an instruction to the UE.

Example 1

When the system shown in FIG. 1 is used, an uplink transmission power control method according to an embodiment of the present invention is shown in FIG. 2, and the method includes the following steps:

In step s201, the uplink measurement signal change of the base station cell is filtered. In this embodiment, the RNC filters the uplink measurement signal change of the low-power base station cell, where the uplink measurement signal includes, but is not limited to, the SIR, the RSCP, and the uplink error rate BER of the uplink dedicated pilot, and the filtering method adopts the IIR (Infinite Impulse Response). , infinitely long impulse response) filtering method for filtering, the specific process is:

Filtering the uplink measurement signal according to the formula F _n = (1 - α) × F _n-1 + α × M _n , where: F _n is the value filtered by the uplink signal quality n; F _n-1 is the uplink signal quality value at time n-1 filtering; n and n-1 time to report the particle size difference between the uplink time interval measurement signal is determined; M _n is an uplink signal measurement time ^{n; α = (1/2) (k} / 2) Where k is the filter coefficient and k ≥ 0.

For the value of k, in the low-speed Rayleigh fast fading environment, the filter coefficient k can be slightly larger, which can make the measurement result more accurate; in the high-speed environment, the filter coefficient k can be slightly smaller, which can improve the measurement. Reflect the speed. When k is equal to 0, it is equivalent to the filter transparent transmission signal, and there is no filtering.

In step s202, it is determined whether the absolute value of the difference of the uplink signal quality filter values at the adjacent time reaches a preset threshold. If yes, the process goes to step s203; otherwise, the process ends. In this embodiment, if |F _n -F _n-1 |≥△, the RNC triggers the UE to transmit the power parameter update and deliver the uplink transmit power to the UE through RRC air interface signaling. Otherwise, the RNC does not trigger the UE. The transmit power parameter is updated, and is not sent to the UE to adjust the uplink transmit power through RRC air interface signaling. Where Δ is a threshold value, and the threshold setting size is related to adjusting the frequency of the uplink transmission power of the UE. The larger the threshold, the lower the frequency of adjusting the uplink transmit power of the UE; the smaller the threshold, the higher the frequency of adjusting the uplink transmit power of the UE.

Step s203: Adjust the transmit power parameter of the UE according to the filtered uplink signal quality. In this embodiment, the transmit power parameter includes a transmit power parameter β _{ec of the} E-DPCCH, a transmit power parameter β _{ed of the} E-DPDCH, and/or a transmit power parameter β _{d of the} DPDCH. If the uplink service of the user adopts the E-DCH transmission, the β _ec and β _{ed of the} UE are adjusted; if the uplink service of the user adopts the DCH (Dedicated Channel) transmission, the β _{d of the} UE is adjusted; if the uplink service of the user adopts the E-DCH The transmission simultaneous uplink service also uses DCH transmission, then adjust the UE's β _ec , β _ed and β _d .

The transmit power parameter is obtained by the following formula:

(β _ec ) _n =(β _ec ) _n-1 +F _n -A;

(β _ed ) _n =(β _ed ) _n-1 +F _n -B;

(β _d ) _n =(β _d ) _n-1 +F _n -C;

In step s204, the adjusted transmit power parameter is sent to the UE to adjust the uplink transmit power by using RRC air interface signaling. In this embodiment, the values of β _ec , β _{ed ,} and/or β _d of the UE are transmitted to the UE to adjust the uplink transmit power by using RRC air interface signaling.

Example 2

In step s201, the uplink measurement signal change of the base station cell is filtered. In this embodiment, the RNC filters the uplink measurement signal change of the macro base station cell, where the uplink measurement signal includes, but is not limited to, the SIR, the RSCP, and the uplink error rate BER of the uplink dedicated pilot, and the filtering method uses the IIR filtering method to filter, The specific process is:

Step s203: Adjust the transmit power parameter of the UE according to the filtered uplink signal quality. In this embodiment, the transmit power parameter includes a transmit power parameter β _{ec of the} E-DPCCH, a transmit power parameter β _{ed of the} E-DPDCH, and/or a transmit power parameter β _{d of the} DPDCH. If the user uplink service adopts E-DCH transmission, adjust the β _ec and β _{ed of the} UE; if the uplink service of the user adopts the DCH transmission, adjust the β _{d of the} UE; if the uplink service of the user adopts the E-DCH transmission, and the uplink service also adopts the DCH Transmit, then adjust the UE's β _ec , β _ed and β _d .

The transmit power parameter is obtained by the following formula:

(β _ec ) _n =(β _ec ) _n-1 +F _n -A;

(β _ed ) _n =(β _ed ) _n-1 +F _n -B;

(β _d ) _n =(β _d ) _n-1 +F _n -C;

Example 3

In step s201, the uplink measurement signal change of the base station cell is filtered. In this embodiment, the RNC filters the difference between the uplink measurement signal of the macro cell and the low power base station cell, where the uplink measurement signal includes, but is not limited to, the SIR, the RSCP, and the uplink error rate BER of the uplink dedicated pilot, and the filtering mode is adopted. The IIR filtering method performs filtering, and the specific process is:

The uplink measurement signal change is filtered according to the formula F _n = (1 - α) × F _n-1 + α × M _n , where: F _n is the n-time filtering of the difference between the macro cell and the low-power base station cell uplink measurement signal The value of F _n-1 is the value of the n-1 time filtering of the difference between the macro cell and the low power base station cell uplink measurement signal; the time granularity of the difference between the n and the n-1 time is determined by the uplink measurement signal reporting interval time; _n is the uplink signal measurement at time n; α = (1/2) ^(k/2) , where k is the filter coefficient and k ≥ 0.

Step s203: Adjust the transmit power parameter of the UE correspondingly according to the uplink signal quality after the difference filtering. In this embodiment, the transmit power parameter includes a transmit power parameter β _{ec of the} E-DPCCH, a transmit power parameter β _{ed of the} E-DPDCH, and/or a transmit power parameter β _{d of the} DPDCH. If the user uplink service adopts E-DCH transmission, adjust the β _ec and β _{ed of the} UE; if the uplink service of the user adopts the DCH transmission, adjust the β _{d of the} UE; if the uplink service of the user adopts the E-DCH transmission, and the uplink service also adopts the DCH Transmit, then adjust the UE's β _ec , β _ed and β _d .

The transmit power parameter is obtained by the following formula:

(β _ec ) _n =(β _ec ) _n-1 +F _n -A;

(β _ed ) _n =(β _ed ) _n-1 +F _n -B;

(β _d ) _n =(β _d ) _n-1 +F _n -C;

Example 4

In step s201, the uplink measurement signal change of the base station cell is filtered. In this embodiment, the RNC separately filters the uplink measurement signal changes of the low power base station cell and the macro base station cell, and the uplink measurement signal includes but is not limited to the uplink dedicated pilot SIR, RSCP, and uplink error rate BER, and the filtering mode is adopted. The IIR filtering method performs filtering, and the specific process is:

The uplink measurement signal change is filtered according to the formula F _n = (1 - α) × F _n-1 + α × M _n , where: F _n represents the value of the uplink signal quality n time filtered, and F _n is the macro base station cell at time n The filtered value of the uplink measurement signal F _mn or n time, the filtered value of the low-power base station cell uplink measurement signal F _sn ; F _n-1 represents the value of the uplink signal quality n-1 time filtering, F _n-1 is n-1 The filtered value of the uplink measurement signal of the macro base station cell F _m(n-1) or the value of the filtered signal of the uplink measurement signal of the low power base station cell at time F _s(n-1) ; the difference between n and n-1 The time granularity is determined by the uplink measurement signal reporting interval; Mn is the upstream signal measurement at time n; α = (1/2) ^(k/2) , where k is the filter coefficient and k ≥ 0.

In step s202, it is determined whether the absolute value of the difference of the uplink signal quality filter values at the adjacent time reaches a preset threshold value, and if yes, the process proceeds to step s203; otherwise, the process ends. In this embodiment, if |F _n -F _n-1 |≥△, the RNC triggers the UE to transmit the power parameter update and deliver the uplink transmit power to the UE through RRC air interface signaling. Otherwise, the RNC does not trigger the UE. The transmit power parameter is updated, and is not sent to the UE to adjust the uplink transmit power through RRC air interface signaling. Where Δ is a threshold value, and the threshold setting size is related to adjusting the frequency of the uplink transmission power of the UE. The larger the threshold, the lower the frequency of adjusting the uplink transmit power of the UE; the smaller the threshold, the higher the frequency of adjusting the uplink transmit power of the UE.

Step s203: Adjust the transmit power parameter of the UE according to the difference between the filtered by the uplink measurement signal of the macro base station cell and the low power base station cell. In this embodiment, the transmit power parameter includes a transmit power parameter β _{ec of the} E-DPCCH, a transmit power parameter β _{ed of the} E-DPDCH, and/or a transmit power parameter β _{d of the} DPDCH. If the user uplink service adopts E-DCH transmission, adjust the β _ec and β _{ed of the} UE; if the uplink service of the user adopts the DCH transmission, adjust the β _{d of the} UE; if the uplink service of the user adopts the E-DCH transmission, and the uplink service also adopts the DCH Transmit, then adjust the UE's β _ec , β _ed and β _d .

The transmit power parameter is obtained by the following formula:

(β _ec ) _n =(β _ec ) _n-1 +F _nd -A;

(β _ed ) _n =(β _ed ) _n-1 +F _nd -B;

(β _d ) _n =(β _d ) _n-1 +F _nd -C;

F _dn =F _mn -F _sn ;

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the foregoing embodiment can be implemented by means of software plus a necessary general hardware platform, and can also be implemented by hardware.

Example 5

An uplink transmission power control apparatus according to an embodiment of the present invention is as shown in FIG. 3, the apparatus includes a filtering module, a determining module, and a power adjusting module, where the determining module is respectively connected to the filtering module and the power adjusting module, A filtering module is coupled to the power adjustment module.

The filtering module is configured to filter the uplink measurement signal change of the base station cell, and the determining module is configured to compare the absolute value of the difference between the uplink signal quality filter values of the adjacent time and the preset threshold to determine whether to send the uplink to the UE. The power is adjusted; the power adjustment module is configured to adjust the uplink transmit power of the UE according to the filtered uplink signal quality.

The above uplink transmission power control device may be a controller or the like in the base station. Uplink transmission power control device The filtering module, the judging module and the power adjustment module can be implemented by hardware, software or a combination of both. For example, the filtering module, the judging module, and the power adjustment module can be implemented by a digital signal processing device or a wireless signal processing chip in the base station in conjunction with a specific algorithm stored in the memory. The above modules are all located in the same processor; or, the above modules are respectively located in multiple processors.

While the preferred embodiments of the present invention have been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

Industrial applicability

The present invention is applicable to the field of wireless communication technologies, and is used to improve the user's uplink service experience and increase the uplink performance capacity of the heterogeneous network system.

Claims

An uplink transmit power control method includes the following steps:

A. Filtering the uplink measurement signal change of the base station cell;

B. Adjust the uplink transmit power of the UE according to the filtered uplink signal quality.
The uplink transmission power control method according to claim 1, wherein the step A comprises: filtering an uplink measurement signal change of the low power base station cell or the macro base station cell.
The uplink transmission power control method according to claim 2, wherein in the step A, the measurement of the uplink measurement signal is filtered by using an infinite-length impulse response filtering method, including:

Filtering the change of the uplink measurement signal according to the formula F n = (1 - α) × F n-1 + α × M n , where:

F n is a value of an uplink signal in the n-time filter; F. N-1 is the value of time filtered uplink signal quality n-1; n and n-1 time difference temporal granularity the uplink measurement signal reporting intervals determined; M n is Upstream signal measurement at time n; α = (1/2) (k/2) , where k is the filter coefficient and k ≥ 0.
The uplink transmission power control method according to claim 3, wherein in the step B, the UE adjusts a transmit power parameter of the UE according to the filtered uplink signal quality Fn , and the RRC air interface signaling is adjusted. The transmit power parameter is sent to the UE to adjust the uplink transmit power; the transmit power parameter includes a transmit power parameter β ec of the E-DPCCH, a transmit power parameter β ed of the E-DPDCH, and/or a transmit power parameter β d of the DPDCH;

The transmit power parameter is obtained by the following formula:

(β ec ) n =(β ec ) n-1 +F n -A;

(β ed ) n =(β ed ) n-1 +F n -B;

(β d) n = (β d) n-1 + F n -C;

Where Fn is the value filtered by the upstream signal quality n; A, B, C are constants greater than or equal to zero.
The uplink transmission power control method according to claim 1, wherein the step A comprises: filtering a difference between an uplink measurement signal of the macro cell and the low power base station cell.
The uplink transmit power control method according to claim 5, wherein in the step A, the infinite-length impulse response filtering method is used to filter the uplink measurement signal change, including:

Filtering the change of the uplink measurement signal according to the formula F n = (1 - α) × F n-1 + α × M n , where:

F n is a value of n-time filtering of a difference between a macro cell and a low-power base station cell uplink measurement signal; and F n-1 is a value filtered by n-1 time of a difference between the macro cell and the low-power base station cell uplink measurement signal; n and n-1 time to report the particle size difference between the uplink time interval measurement signal is determined; M n is an uplink signal measurement time n; α = (1/2) (k / 2), where k is a filter coefficient, and K≥0.
The uplink transmission power control method according to claim 6, wherein in the step B, the method further comprises: adjusting, according to the difference filtered uplink signal quality Fn , the UE transmit power parameter, and using RRC air interface signaling The adjusted transmit power parameter is sent to the UE to adjust the uplink transmit power; the transmit power parameter includes the transmit power parameter β ec of the E-DPCCH, the transmit power parameter β ed of the E-DPDCH, and/or the transmit power parameter β of the DPDCH. d ;

The transmit power parameter is obtained by the following formula:

(β ec) n = (β ec) n-1 + F n -A;

(β ed ) n =(β ed ) n-1 +F n -B;

(β d ) n =(β d ) n-1 +F n -C;

Where Fn is the value of the n-time filtering of the difference between the macro cell and the low-power base station cell uplink measurement signal; A, B, and C are constants greater than or equal to zero.
The uplink transmission power control method according to claim 1, wherein the step A comprises: separately filtering uplink measurement signal changes of the low power base station cell and the macro base station cell.
The uplink transmit power control method according to claim 8, wherein in the step A, the infinite-length impulse response filtering method is used to filter the uplink measurement signal change, including:

Filtering the change of the uplink measurement signal according to the formula F n = (1 - α) × F n-1 + α × M n , where:

F n represents a value uplink signal quality time n filter, F n is n value obtained at time F mn or n timing values F sn the low-power base station cell uplink measurement signal is filtered after the macro base station cell uplink measurement signal filtering; F n-1 Indicates the value of the uplink signal quality n-1 time filtering, F n-1 is the filtered value of the macro base station cell uplink measurement signal at time n-1, F m(n-1) or n-1 time low power base station cell uplink measurement signal The filtered value F s(n-1) ; the time granularity of the difference between n and n-1 is determined by the interval of the uplink measurement signal reporting; Mn is the measured value of the uplink signal at time n; α = (1/2) (k /2) where k is the filter coefficient and k ≥ 0.
The uplink transmission power control method according to claim 9, wherein in the step B, the method comprises: adjusting, according to the difference F dn filtered by the uplink measurement signal of the macro base station cell and the low power base station cell, the UE transmission The power parameter is sent to the UE to adjust the uplink transmit power by using the RRC air interface signaling; the transmit power parameter includes the transmit power parameter β ec of the E-DPCCH and the transmit power parameter β ed of the E-DPDCH. And/or DPDCH transmit power parameter β d ;

The transmit power parameter is obtained by the following formula:

(β ec ) n =(β ec ) n-1 +F nd -A;

(β ed ) n =(β ed ) n-1 +F nd -B;

(β d ) n =(β d ) n-1 +F nd -C;

F dn =F mn -F sn ;

Where F dn is the difference of the uplink measurement signal filtered by the macro base station cell and the low power base station cell at time n; F mn is the filtered value of the macro base station cell uplink measurement signal at time n; F sn is the low power base station cell uplink at time n The filtered signal is measured; A, B, and C are constants greater than or equal to zero.
The uplink transmission power control method according to any one of claims 1 to 10, further comprising: determining whether the absolute value of the difference of the uplink signal quality filter values at the adjacent time is between the step A and the step B A predetermined threshold is reached, if yes, go to step B; if not, then end.
The uplink transmission power control method according to any one of claims 1 to 10, wherein the uplink The measurement signal includes the SIR, RSCP, and uplink error rate BER of the uplink dedicated pilot.
An uplink transmit power control device includes:

a filtering module, configured to filter an uplink measurement signal change of the base station cell;

The power adjustment module is configured to adjust the uplink transmit power of the UE according to the filtered uplink signal quality.
The uplink transmission power control apparatus according to claim 13, wherein the apparatus further comprises a determination module configured to compare an absolute value of a difference of uplink signal quality filter values at an adjacent time with a preset threshold value, and determine Whether to adjust the uplink transmission power of the UE.