CN101778463B - Home base station and transmitting power setting method thereof - Google Patents

Abstract

The invention discloses a home base station and a transmission power setting method thereof, which are used to reduce the interference produced by the home base station to macro terminals and other home terminals. The transmission power setting method of the home base station includes: the home base station receives the measurement result of the received power of the non-serving base station pilot/reference signal reported by the home terminal; the home base station sets the transmission power with reference to the received measurement result. The invention does not need to modify the protocol, and effectively reduces the interference produced by the home base station to the macro terminal and other home terminals.

Description

A home base station and method for setting transmission power thereof

technical field

The present invention relates to the field of mobile communication, in particular to a home base station and its transmission power setting technology.

Background technique

Home NodeB (HNB), also known as Femto Cell/FemtoNodeB, Pico Cell/Pico NodeB, etc., is an extremely low transmission power communication base station for indoor scenarios. It is purchased and installed by itself, usually placed on a table or on the ground indoors, to provide wireless access services for home users. In general, the transmit power of the femtocell is a relatively constant power value, which is adjusted only when its placement changes or the deployment of nearby macro base stations changes greatly. Femtocells extend the indoor coverage of mobile signals at a relatively low cost, meeting users' needs for high-speed data services in indoor scenarios, and can comprehensively provide various traditional fixed network services (such as broadband Internet access services and fixed voice services) .

Due to randomness and uncertainty of home base station deployment, there is inevitably interference between home base stations and macro base stations (such as BaseStation, NodeB, eNodeB, collectively referred to as Macro NodeB) and among home base stations. For ease of distinction, the user equipment connected to the home base station is called a home terminal (Home User Equipment, Home UE), and the user equipment connected to the macro base station is called a macro terminal (Macro User Equipment, Macro UE). Schematic diagram of interference between base stations, as shown in Figure 1, there are mainly the following types of interference between home base stations and macro base stations and between home base stations: home base station HNB 1 interferes with macro terminal Macro UE, and home terminal Home UE interferes with macro base station Macro NodeB, macro base station Macro NodeB interferes with home terminal Home UE, macro terminal Macro UE interferes with home base station HNB1, home base station HNB1 interferes with home terminal accessing other home base stations (referred to as other home terminals), and home terminal Home UE interferes with non-serving home base stations HNB2. It can be seen that how to reduce the interference generated by the home base station to the macro terminal and other home terminals has become one of the problems to be solved urgently in the prior art.

Contents of the invention

The present invention provides a home base station and a transmission power setting method thereof, which are used to reduce the interference produced by the home base station to macro terminals and other home terminals.

The transmission power setting method of the home base station provided by the present invention includes:

The home base station receives the measurement result of the received power of the non-serving base station pilot/reference signal reported by the home terminal;

The femtocell sets transmit power with reference to the received measurement results.

The home base station provided by the present invention includes:

The receiving unit is configured to receive the measurement result of the pilot/reference signal received power of the non-serving base station reported by the home terminal;

The power setting unit is used for setting the transmit power with reference to the received measurement result.

In the home base station and its transmit power setting method provided by the present invention, the transmit power of the home base station no longer adopts a relatively constant power value, but effectively uses the home terminal to measure and report the received power of the pilot/reference signal of the non-serving base station. The base station uses the measurement result reported by the home terminal as a reference basis for setting the transmit power of the base station. The present invention does not need to modify the protocol, and has strong implementability. The home base station refers to the non-serving base station pilot/reference signal receiving power reported by the home terminal to set the transmission power of the base station, thereby effectively reducing the impact of the home base station on the macro terminal and other home terminals. generated interference; the present invention can ensure that the transmission power of the home base station is improved under the premise of controlling the interference generated by the home base station to other base stations, which is beneficial to improving the user experience of the home terminal.

Description of drawings

FIG. 1 is a schematic diagram of interference between base stations in the prior art;

FIG. 2 is a flowchart of a method for setting transmission power of a home base station in an embodiment of the present invention;

FIG. 3 is a schematic diagram of the implementation principle in Embodiment 1 of the present invention;

FIG. 4 is a flowchart of a method for setting transmit power of a home base station in Embodiment 1 of the present invention;

FIG. 5 is a flowchart of a method for setting transmit power of a home base station in Embodiment 2 of the present invention;

FIG. 6 is a block diagram of a transmission power setting device set in a home base station in an embodiment of the present invention;

FIG. 7 is a possible structural block diagram of a power setting unit in an embodiment of the present invention;

Fig. 8 is a possible structural block diagram of the first determining subunit in the embodiment of the present invention;

Fig. 9 is another possible structural block diagram of the power setting unit in the embodiment of the present invention.

Detailed ways

An embodiment of the present invention provides a transmission power setting method of a home base station, as shown in FIG. 2 , including steps:

S201. The home base station receives the measurement result of the pilot/reference signal received power of the non-serving base station reported by the home terminal under its jurisdiction;

S202. The home base station sets transmit power with reference to the received measurement result.

In the embodiment of the present invention, the transmission power of the home base station no longer adopts a relatively constant power value, but effectively utilizes the home terminal under the jurisdiction of the home base station to measure and report the received power of the pilot/reference signal of the non-serving base station. The transmission power is set, thereby reducing the interference generated by the home base station to the macro terminal and other home terminals. The home base stations described in the embodiments of the present invention include but are not limited to HNB, Femto Cell, Femto NodeB, Pico Cell, and Pico NodeB.

The technical solutions provided by the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Embodiment one

The technical solution adopted in this embodiment includes: the home base station determines the distance between the home base station and the non-serving base station according to the measurement result of the pilot/reference signal received power of the non-serving base station reported by the home terminal, and refers to the distance between the home base station and the non-serving base station. The distance between base stations sets the transmit power.

First, the basic implementation principle of this embodiment is introduced. For the distance between the home base station and the macro base station, as shown in Figure 3, with the macro base station as the center of the circle, several concentric circles can be obtained by setting different distance domain values between the home base station and the macro base station as radii, thereby dividing the first Zone One, Zone Two, Zone Three, and so on. The calculation method of the receiving SNR of the macro terminal is shown in the formula [1]:

SIR _MUE = (P _{tx_MNB} /PL _{MNB_MUE} )/(P _{tx_HNB} /PL _{HNB_MUE} +N+I) [1]

Among them, SIR _MUE is the receiving signal-to-noise ratio of the macro terminal, P _{tx_MNB} is the transmit power of the macro base station, PL _{MNB_MUE} is the path loss from the macro base station to the macro terminal, P _{tx_HNB} is the transmit power of the home base station, and PL _{HNB_MUE} is the transmission power of the home base station to the macro terminal. The path loss of the terminal, N is the noise power of the macro terminal, and I is the interference power from other base stations to the macro terminal.

When the distance between the home base station and the macro base station is small (for example, the home base station is placed in the first area), since the distance between the macro base station and the home base station and the macro terminal is relatively close, the PL _{HNB_MUE} is relatively close to the PL _{MNB_MUE} . In some cases, since the transmit power of the macro base station is much greater than the transmit power of the home base station, the interference generated by the home base station to the macro terminal will cause a small drop in the receiving signal-to-noise ratio of the macro terminal, and the home base station can set a relatively large transmit power; when When the distance between the home base station and the macro base station is large (for example, the home base station is placed in the third area), for a macro terminal that is far away from the macro base station but close to the home base station, the difference between PL _{HNB_MUE} and PL _{MNB_MUE} Relatively large (PL _{MNB_MUE} >>PL _{HNB_MUE} ), that is, the difference between the path loss from the home base station to the macro terminal and the path loss from the macro base station to the macro terminal is far greater than the difference in transmit power between the macro base station and the home base station, The interference generated by the home base station to the macro terminal causes a large drop in the receiving signal-to-noise ratio of the macro terminal, and the home base station should set a relatively small transmit power. Similarly, when the distance between the home base stations is small, the home base station can set a relatively large transmit power; when the distance between the home base station and the macro base station is large, the home base station should set relatively small transmit power.

Since the coverage of the home base station is relatively small, the distance between the home base station and the macro base station or other home base stations can be approximately determined by the distance between the home terminal under the jurisdiction of the home base station and the non-serving base station. As shown in FIG. 4, the method for setting the transmission power of the home base station provided in Embodiment 1 includes the following steps:

S401. The home base station receives the measurement result of the pilot/reference signal received power of the non-serving base station reported by the home terminal;

In the existing technical standards, the home terminal will measure and report the received power of the pilot/reference signal of the non-serving base station for cell handover or inter-cell reselection; among them, there are generally multiple home terminals under the jurisdiction of the home base station, and each There are generally multiple non-serving base stations measured by the home terminal, including macro base stations, or other home base stations, or macro base stations and other home base stations; / Reference signal received power measurement.

S402. The home base station determines the distance between the home base station and the non-serving base station according to the received measurement result, specifically including the following steps:

a. Extracting all measured values of the pilot/reference signal received power of each non-serving base station from the measurement results;

b. Combining all measured values of the pilot/reference signal received power of each non-serving base station to obtain a combined effective value;

c. Determine the path loss from the home base station to each non-serving base station according to the combined effective value of the pilot/reference signal received power of each non-serving base station and the reference transmit power of the non-serving base station;

d. Determine the distance between the home base station and each non-serving base station according to the path loss from the home base station to each non-serving base station.

S403. The home base station sets transmit power with reference to the determined distance between the home base station and the non-serving base station;

With reference to the determined distance between the home base station and the non-serving base station, the home base station may set the transmission power in consideration of coverage requirements of the home base station and other factors.

Preferably, in S402, the home base station can smooth the measured value of the received power of each non-serving base station pilot/reference signal for each home terminal in order to reduce the impact of small-scale fading on the instantaneous measured value Processing, the smoothing processing method adopted for each measured value of the pilot/reference signal received power of each non-serving base station is shown in formula [2]:

PCCPCH _RSCP (n) = α PCCPCH _RSCP (n-1) + (1-α) PCCPCH _RSCP (n) [2]

Among them, PCCPCH _RSCP (n) is the smoothing effective value obtained by any home terminal after smoothing the current measurement value of the pilot/reference signal received power of any non-serving base station; PCCPCH _RSCP (n-1) is the The smooth effective value obtained after smoothing the previous measurement value of the pilot/reference signal received power; PCCPCH _RSCP (n) is the current measurement value of the pilot/reference signal received power; α is the set weighting factor and 0 ≤α≤1.

The femto base station can combine all the measured values of the pilot/reference signal received power of each non-serving base station by means of maximum ratio combination, equal gain combination or selective combination. The combined processing method adopted is shown in the formula [3] :

$\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{{\mathrm{<span\; class="notranslate">\; PCCPCH</span>}}_{\mathrm{<span\; class="notranslate">\; RSCP</span>}}}<span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; \&Center\; Dot;</span>\mathrm{<span\; class="notranslate">\; PCCPC</span>}{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; RSCP</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; ]</span>$

Among them, PCCPCH _RSCP is the combined effective value obtained after combining all the measured values of the pilot/reference signal received power of any non-serving base station; N is the number of reported measured values of the non-serving base station pilot/reference signal received power The number of home terminals; i is the i-th home terminal, PCCPCH _RSCP (i) is the measured value of the non-serving base station pilot/reference signal received power reported by the i-th home terminal; α _i is the weight of the i-th home terminal factor. If the α _i of the i-th home terminal is equal to the signal-to-noise ratio of the i-th home terminal pilot/reference signal, the maximum ratio combining method is adopted, and if the α _i of all home terminals are 1, the equal-gain combining method is adopted, α _i can also take other values. It should be pointed out that before the combined processing of the home base station, if the measured value of the pilot/reference signal received power of each non-serving base station for each home terminal is smoothed according to the formula [2] to obtain a smoothed effective value, Then PCCPCH _RSCP (i) in formula [3] is the smoothed effective value obtained after smoothing the measured value of the pilot/reference signal received power of the non-serving base station reported by the i-th home terminal.

The home base station can calculate the path loss from the home base station to each non-serving base station according to the combined effective value of the pilot/reference signal received power of each non-serving base station and the reference transmit power of the non-serving base station. The model can then determine the distance between the two. Since there are generally multiple non-serving base stations, the distance between the home base station and the non-serving base stations generally includes multiple distances between the home base station and each non-serving base station.

The propagation model may be a free space propagation model, or other propagation models such as hata model, cost231 model, vehicle model, etc. The path loss is generally a power function of the distance. In the free space propagation model, the path loss is proportional to the second power of the distance; in urban cells, the path loss is approximately proportional to the 2.7-3.5 power of the distance; The line-of-sight path loss is approximately proportional to the 1.6-1.8 power of the distance; the path loss blocked by ordinary buildings on the radio wave propagation path is approximately proportional to the 3-5 power of the distance; there are tall buildings on the radio wave propagation path The blocked path loss is approximately proportional to the 4th to 6th power of the distance. The propagation model may be selected to be determined by a ray tracing method, and an appropriate propagation model may also be selected according to an actual deployment scenario of the Femtocell.

In S403, if there are multiple non-serving base stations, for the determined multiple distances between the home base station and each non-serving base station, generally the minimum distance is used as a reference basis for setting the transmission power, that is, referring to the distance between the home base station and each non-serving base station The minimum distance between serving base stations sets the transmission power, and the specific setting method is shown in the formula [4]:

P _tx =I _max +Pathloss+ACIR-ΔP [4]

Among them, P _tx is the transmission power of the home base station; I _max is the maximum allowable interference power of the non-serving base station corresponding to the minimum distance; Pathloss is the path loss determined according to the minimum distance. The propagation model determines the path loss; ACIR is the adjacent channel interference power ratio between the home base station and the non-serving base station corresponding to the minimum distance, determined by the adjacent channel leakage power ratio (ACLR) and the adjacent channel selectivity parameter (ACS), if the frequency is the same , then the value of ACIR is 0; ΔP is the set interference power adjustment value, and ΔP can be set to 0.

Preferably, when setting the transmit power, the home base station also refers to the channel quality indicator (Channel Quality Indicator, CQI) reported by the home terminal, wherein the CQI includes the recommended modulation method (RMF) and the recommended transport block size (RTBS). Generally, when the CQI is good, the transmit power of the home base station can be appropriately reduced, and when the CQI is poor, the transmit power of the home base station can be appropriately increased.

In this embodiment, the home base station effectively uses the home terminal to measure and report the received power of the pilot/reference signal of the non-serving base station. Since the coverage of the home base station is relatively small, the distance between the home terminal and the non-serving base station can be approximated As the distance between the home base station and the non-serving base station, the distance between the home base station and the non-serving base station is determined according to the measurement results reported by the home terminal, and the transmission power is set with reference to the distance between the home base station and the non-serving base station, so as to effectively The interference generated by the home base station to the macro terminal and other home terminals is reduced.

Embodiment two

The technical solution adopted in this embodiment includes: the home base station determines the path loss from the home base station to the non-serving base station according to the measurement result of the pilot/reference signal received power of the non-serving base station reported by the home terminal, and refers to the path loss from the home base station to the non-serving base station The path loss sets the transmit power.

Since the coverage of the home base station is relatively small, the path loss from the home base station to the macro base station or other home base stations can be approximately determined by the path loss from the home terminal under the jurisdiction of the home base station to the non-serving base station. As shown in FIG. 5, the method for setting the transmission power of the home base station provided by Embodiment 2 includes the following steps:

S501. The home base station receives the measurement result of the pilot/reference signal received power of the non-serving base station reported by the home terminal;

S502. The home base station determines the path loss from the home base station to the non-serving base station according to the received measurement result, specifically including the following steps:

a. Extracting all measured values of the pilot/reference signal received power of each non-serving base station from the measurement results;

b. Combining all measured values of the pilot/reference signal received power of each non-serving base station to obtain a combined effective value;

c. Determine the path loss from the home base station to each non-serving base station according to the combined effective value of the pilot/reference signal received power of each non-serving base station and the reference transmit power of the non-serving base station.

S503. The home base station sets transmit power with reference to the determined path loss from the home base station to the non-serving base station;

With reference to the determined path loss from the home base station to the non-serving base station, the home base station may set the transmission power in consideration of coverage requirements of the home base station and other factors.

Preferably, in S502, the home base station can smooth the measured value of the received power of each non-serving base station pilot/reference signal for each home terminal in order to reduce the impact of small-scale fading on the instantaneous measured value Processing, the smoothing processing method adopted for each measured value of the pilot/reference signal received power of each non-serving base station is also shown in the formula [2], and will not be described again.

All measured values of the pilot/reference signal received power of each non-serving base station by the home base station can be combined by means of maximum ratio combination, equal gain combination, or selective combination. indicated, no more details.

The home base station can calculate the path loss from the home base station to each non-serving base station according to the combined effective value of the pilot/reference signal received power of each non-serving base station and the reference transmit power of the non-serving base station, because the non-serving base station is generally Multiple, so the path loss from the home base station to the non-serving base station generally includes multiple path losses from the home base station to each non-serving base station.

In S503, if there are multiple non-serving base stations, for the determined multiple path losses from the home base station to each non-serving base station, generally the minimum path loss is used as a reference basis for setting the transmission power, and the preset path loss and The corresponding relationship of transmit power, the transmit power of the home base station is set according to the query result. The corresponding relationship between the path loss and the transmit power may be given in the form of a corresponding relationship list, or may be given in the form of a functional relationship.

In this embodiment, the home base station effectively uses the home terminal to measure and report the received power of the pilot/reference signal of the non-serving base station. Since the coverage of the home base station is relatively small, the path loss from the home terminal to the non-serving base station can be approximated as For the path loss from the home base station to the non-serving base station, determine the path loss from the home base station to the non-serving base station according to the measurement results reported by the home terminal, and set the transmit power with reference to the path loss from the home base station to the non-serving base station, thereby effectively reducing the home base station. Interference to macro terminals and other home terminals.

Based on the same technical concept, an embodiment of the present invention provides a transmission power setting device set in a home base station. As shown in FIG. 6, the transmission power setting device includes:

The receiving unit 601 is configured to receive the measurement result of the received power of the non-serving base station pilot/reference signal reported by the home terminal;

Wherein, the measurement result includes the measurement value of the received power of the pilot/reference signal of the non-serving base station by each home terminal under the jurisdiction of the home base station;

A power setting unit 602, configured to set transmit power with reference to the received measurement result.

As shown in FIG. 7, a possible structure of the power setting unit 602 includes:

The first determination subunit 701 is configured to determine the distance between the home base station and the non-serving base station according to the received measurement result;

The first setting subunit 702 is configured to set the transmit power with reference to the distance between the home base station and the non-serving base station.

A possible structure of the first determining subunit 701, as shown in FIG. 8 , includes:

An extracting module 801, configured to extract all measured values of the pilot/reference signal received power of each non-serving base station from the measurement results;

A combining processing module 802, configured to perform combining processing on all measured values of the pilot/reference signal received power of each non-serving base station to obtain a combined effective value;

Path loss determination module 803, configured to determine the path loss from the home base station to each non-serving base station according to the combined effective value of the pilot/reference signal received power of each non-serving base station and the reference transmit power of the non-serving base station;

The distance determining module 804 is configured to determine the distance between the home base station and each non-serving base station according to the path loss from the home base station to each non-serving base station.

If there are multiple non-serving base stations, the first setting subunit 702 sets the transmit power with reference to the minimum distance between the home base station and each non-serving base station.

As shown in FIG. 9, another possible structure of the power setting unit 602 includes:

The second determining subunit 901 is configured to determine the path loss from the home base station to the non-serving base station according to the received measurement result;

The second setting subunit 902 is configured to set the transmit power with reference to the path loss from the home base station to the non-serving base station.

If there are multiple non-serving base stations, the second setting subunit 902 sets the transmit power with reference to the minimum path loss from the home base station to each non-serving base station.

Preferably, the power setting unit 602 in the transmission power setting device is also used to refer to the CQI reported by the home terminal when setting the transmission power.

In the home base station and its transmission power setting method provided by the embodiment of the present invention, the transmission power of the home base station no longer adopts a relatively constant power value, but effectively uses the home terminal to measure and report the received power of the pilot/reference signal of the non-serving base station , the home base station sets the transmission power with reference to the measurement result reported by the home terminal;

The home base station and its transmission power setting method provided by the embodiments of the present invention do not need to modify the protocol, and are highly implementable. When setting the transmission power, the non-serving base station pilot/reference signal received power reported by the home terminal is taken into account, thereby effectively It reduces the interference generated by the home base station to the macro terminal and other home terminals, and can also refer to the CQI reported by the home terminal when setting the transmission power, thereby improving the accuracy of the set transmission power;

The home base station and the transmission power setting method thereof provided by the embodiments of the present invention can ensure that the transmission power of the home base station is improved under the premise of controlling the interference generated by the home base station to other base stations, which is beneficial to improving the user experience of the home terminal.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (14)

1. A method for setting transmission power of a home base station is characterized by comprising the following steps:

the method comprises the steps that a home base station receives a measurement result of non-service base station pilot frequency/reference signal receiving power reported by a home terminal, wherein the number of the non-service base stations is multiple;

the femtocell determines the distance between the femtocell and the non-service base station according to the received measurement result, and sets the transmitting power by referring to the minimum distance between the femtocell and each non-service base station, wherein the minimum distance between the femtocell and each non-service base station is referred toThe setting of the transmission power is realized by the following formula: p_tx＝I_max+ Patholoss + ACIR-. DELTA.P, where P_txIs the transmission power of the home base station; i is_maxThe maximum allowed interference power of the non-service base station corresponding to the minimum distance is obtained; pathloss is the path loss determined from the minimum distance; ACIR is adjacent channel interference power ratio between the home base station and the non-service base station corresponding to the minimum distance; delta P is a set interference power adjustment value; or

The femtocell determines path loss from the femtocell to the non-serving base station according to the received measurement result, and sets transmission power by referring to the minimum path loss from the femtocell to each non-serving base station, wherein the setting of the transmission power by referring to the minimum path loss from the femtocell to each non-serving base station specifically includes: and inquiring the corresponding relation between the set path loss and the transmitting power according to the minimum path loss from the home base station to each non-service base station, and setting the transmitting power of the home base station according to the inquiring result.

2. The method of claim 1, wherein the non-serving base station comprises a macro base station and/or other home base stations, and the measurement result comprises a measurement value of non-serving base station pilot/reference signal received power by each home terminal governed by the home base station.

3. The method according to claim 2, wherein the determining the distance between the femtocell and the non-serving base station according to the received measurement result comprises:

extracting all measured values of the pilot frequency/reference signal received power of each non-service base station from the measuring results respectively;

all the measurement values of the pilot frequency/reference signal receiving power of each non-service base station are combined to obtain a combined effective value;

determining the path loss from the home base station to each non-service base station according to the combined effective value of the pilot frequency/reference signal receiving power of each non-service base station and the reference transmitting power of the non-service base station;

and determining the distance between the home base station and each non-service base station according to the path loss from the home base station to each non-service base station.

4. The method according to claim 2, wherein the determining the path loss from the femtocell to the non-serving base station according to the received measurement result specifically comprises:

extracting all measured values of the pilot frequency/reference signal received power of each non-service base station from the measuring results respectively;

all the measurement values of the pilot frequency/reference signal receiving power of each non-service base station are combined to obtain a combined effective value;

and determining the path loss from the home base station to each non-service base station according to the combined effective value of the pilot frequency/reference signal received power of each non-service base station and the reference transmitting power of the non-service base station.

5. The method of claim 3 or 4, wherein the combining all the measured values of the pilot/reference signal received power of each non-serving base station to obtain a combined effective value is implemented by the following formula:

<math> <mrow> <mover> <msub> <mi>PCCPCH</mi> <mi>RSCP</mi> </msub> <mo>&OverBar;</mo> </mover> <mo>=</mo> <munderover> <mi>&Sigma;</mi> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>N</mi> </munderover> <msub> <mi>&alpha;</mi> <mi>i</mi> </msub> <mo>&CenterDot;</mo> <msub> <mi>PCCPCH</mi> <mi>RSCP</mi> </msub> <mrow> <mo>(</mo> <mi>i</mi> <mo>)</mo> </mrow> </mrow> </math>

wherein,

the method comprises the steps of obtaining a combined effective value after combining all measured values of pilot frequency/reference signal receiving power of any non-service base station; n is the number of the home terminals reporting the measured value of the pilot frequency/reference signal receiving power of the non-service base station; i is the ith home terminal, PCCPCH_RSCP(i) A measured value of the non-service base station pilot frequency/reference signal received power, alpha, reported by the ith home terminal_iIs the weighting factor of the ith home terminal.

6. The method of claim 5, wherein α is_iSignal to noise ratio of pilot/reference signal for ith home terminal, or alpha for all home terminals_iAre all 1.

7. The method of claim 3 or 4, further comprising, prior to performing the combining process:

smoothing each measurement of pilot/reference signal received power of each non-serving base station.

8. The method of claim 7, wherein the smoothing of each measured value of pilot/reference signal received power of each non-serving base station is performed by:

<math> <mrow> <mover> <mrow> <msub> <mi>PCCPCH</mi> <mi>RSCP</mi> </msub> <mrow> <mo>(</mo> <mi>n</mi> <mo>)</mo> </mrow> </mrow> <mo>&OverBar;</mo> </mover> <mo>=</mo> <mi>&alpha;</mi> <mo>&CenterDot;</mo> <mover> <mrow> <msub> <mi>PCCPCH</mi> <mi>RSCP</mi> </msub> <mrow> <mo>(</mo> <mi>n</mi> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow> <mo>&OverBar;</mo> </mover> <mo>+</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>+</mo> <mi>&alpha;</mi> <mo>)</mo> </mrow> <mo>&CenterDot;</mo> <msub> <mi>PCCPCH</mi> <mi>RSCP</mi> </msub> <mrow> <mo>(</mo> <mi>n</mi> <mo>)</mo> </mrow> </mrow> </math>

wherein,

smoothing the current measured value of the pilot frequency/reference signal receiving power of any non-service base station for any home terminal to obtain a smoothing effective value;

the smoothing effective value is obtained after the smoothing processing is carried out on the previous measured value of the pilot frequency/reference signal receiving power; PCCPCH_RSCP(n) is the current measurement of the pilot/reference signal received power; alpha is a set weighting factor and alpha is more than or equal to 0 and less than or equal to 1.

9. The method of claim 1, further comprising:

and when the home base station sets the transmitting power, the home base station refers to the channel quality indicator CQI reported by the home terminal.

10. A home base station, comprising:

a receiving unit, configured to receive a measurement result of pilot/reference signal received power of a non-serving base station reported by a home terminal, where the non-serving base station includes multiple non-serving base stations;

a power setting unit comprising: a first determining subunit, configured to determine, according to the received measurement result, a distance between the home base station and the non-serving base station; a first setting subunit for referring to the home base stationThe minimum distance between the non-serving base station and the non-serving base station is set with the transmission power, specifically, the minimum distance is set with the following formula: p_tx＝I_max+ Pathloss + ACIR- Δ P, where Ptx is the transmission power of the home base station; i is_maxThe maximum allowed interference power of the non-service base station corresponding to the minimum distance is obtained; pathloss is the path loss determined from the minimum distance; ACIR is adjacent channel interference power ratio between the home base station and the non-service base station corresponding to the minimum distance; delta P is a set interference power adjustment value; or comprises the following steps: the second determining subunit is used for determining the path loss from the home base station to the non-service base station according to the received measurement result; and a second setting subunit, configured to set the transmission power with reference to the minimum path loss from the femtocell to the non-serving base station, specifically, query a corresponding relationship between the set path loss and the transmission power according to the minimum path loss from the femtocell to each non-serving base station, and set the transmission power of the femtocell according to a query result.

11. The home base station according to claim 10, wherein the measurement result comprises a measurement value of non-serving base station pilot/reference signal received power by each home terminal governed by the home base station.

12. The home base station according to claim 11, wherein the first determining subunit comprises:

an extraction module, configured to extract all measurement values of the pilot/reference signal received power of each non-serving base station from the measurement results respectively;

a merging processing module, configured to merge all measurement values of the pilot/reference signal received power of each non-serving base station to obtain a merged effective value;

a path loss determining module, configured to determine, according to the combined effective value of the pilot frequency/reference signal received power of each non-serving base station and the reference transmit power of the non-serving base station, a path loss from the femtocell to each non-serving base station;

and the distance determining module is used for determining the distance between the home base station and each non-service base station according to the path loss from the home base station to each non-service base station.

13. The home base station according to claim 10, wherein the measurement result comprises a measurement value of non-serving base station pilot/reference signal received power by each home terminal governed by the home base station.

14. The femtocell according to claim 10, wherein the power setting unit is further configured to refer to a channel quality indicator CQI reported by the femtocell when the transmission power is set.

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