CN103916901A

CN103916901A - Power control method and base station

Info

Publication number: CN103916901A
Application number: CN201210593726.1A
Authority: CN
Inventors: 张兴炜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-12-31
Filing date: 2012-12-31
Publication date: 2014-07-09
Also published as: WO2014101895A1

Abstract

The embodiments of the invention provide a power control method. The method comprises: a base station emitting a reference signal through first emission power; and the first base station receiving power control performed on the first emission power of the first base station by a second base station, the first base station being disposed in the coverage scope of the second base station. The embodiments of the invention further provide a base station. Single emission power is employed for trying, and a macro base station, through determining the interference bought to surrounding cells by use of the tried emission power by a micro base station, decides whether to adjust the emission power of the micro base station of maintain current emission power, such that the downlink power control of the micro base station by the macro base station is realized.

Description

The method of power control and base station

Technical field

The embodiment of the present invention relates to the communications field, more specifically, relates to method and the base station of power control.

Background technology

Third generation partner program (3 ^rdgeneration Partnership Project, 3GPP) senior Long Term Evolution (Long Term Evolution-Advanced, LTE-A) Rel-10/11/12 version is Long Term Evolution (Long Term Evolution, LTE) enhancing of Rel-8/9 version, LTE-A system has the bandwidth requirement higher than LTE system, supports the peak data rate up to 1G/s.In order to meet the requirement of LTE-A, LTE-A system is by carrier convergence (Component Aggregation, CA) technology is as the method for its expanding system bandwidth, and adopt in a large number multiple-input, multiple-output (Multiple-Input Multiple-Output, MIMO) enhancing technology and adaptive technique to improve data transfer rate and systematic function.

In Rel-12 version, become a heat subject for the enhancing of hot spot region.Hot spot region comprises indoor and outdoors scene, is covered by the micro-base station of multiple low-power, forms multiple small-cells.Because the effect of micro-base station is to improve throughput of system, and unlike macro base station, need ensuring coverage, thereby micro-base station can be closed or enter resting state, the micro-base station that enters resting state does not provide service for subscriber equipment (User Equipment, UE).In the time having UE to need micro-base station that service is provided, micro-base station need to enter operating state from resting state, and this process is called to be waken up.Waking up of micro-base station can be that macro base station triggers, and can be that UE triggers, and can be also that trigger micro-base station oneself.

Macro base station triggers: macro base station is known the geographical location information of all micro-base stations, the geographical location information of macro base station monitoring UE simultaneously, in the time that macro base station finds that UE enters the overlay area of micro-base station, macro base station wakes micro-base station up, and micro-base station is opened rf chain and entered operating state.

UE triggers: the UE cycle sends one and wakes signaling broadcast up, and dormant micro-base station keeps receiving the ability of waking signaling broadcast up, and in the time that UE enters the overlay area of micro-base station, this broadcast singal is received in micro-base station, is waken up and enters operating state.

Micro-base station triggers: micro-base station is monitored the signal power of uplink band all the time.If a UE who is connected with grand net enters the receiving area of micro-base station, can monitor easily raising of noise platform.When signal strength signal intensity is during higher than thresholding, just think that the micro-base station of UE distance is enough near, now wake micro-base station up and enter operating state.

In prior art, macro base station can only carry out descending power distribution, gives different reference signal (Reference Signal, RS) and data by descending total transmit power allocations, cannot carry out downlink power control to micro-base station.

Summary of the invention

The embodiment of the present invention provides a kind of method and base station of power control, can realize the downlink power control of macro base station to micro-base station.

First aspect, provides a kind of method of power control, comprising: the first base station is with the first transmitting power transmitted reference signal; The power control that carry out the first transmitting power of described the first base station the second base station is accepted in described the first base station.

In conjunction with first aspect, in the possible implementation of the first, described the first base station is positioned at the coverage of described the second base station.

In conjunction with first aspect, in the possible implementation of the second, the power control that carry out the first transmitting power of described the first base station the second base station is accepted in described the first base station, comprising: receive the power control messages that described the second base station sends; Adjust transmitting power according to described power control messages.

In conjunction with the possible implementation of the second of first aspect or first aspect, in the third possible implementation, described power control messages is carried with lower one: the value of the second transmitting power, is used to indicate described the first base station taking the value of described the second transmitting power as transmitting power; Transmitting power adjusted value, is used to indicate described the first base station and adjusts described the first transmitting power according to described transmitting power adjusted value; Or power adjustment commands, is used to indicate described the first base station and reduces transmitting power.

In conjunction with first aspect, in the 4th kind of possible implementation, the power control that carry out the first transmitting power of described the first base station the second base station is accepted in described the first base station, comprising: in the time not receiving any message of described the second base station transmission, reduce transmitting power.

In conjunction with first aspect and above-mentioned any one possible implementation thereof, in the 5th kind of possible implementation, the power control that carry out the first transmitting power of described the first base station the second base station is accepted in described the first base station, comprise: in the time receiving the acknowledge message that described the second base station sends according to described measurement report, maintain described the first transmitting power; Or in the time not receiving any message of described the second base station transmission, maintain described the first transmitting power.

In conjunction with first aspect, in the 6th kind of possible implementation, described the first transmitting power is determined by described the second base station and is sent to described the first base station; Or described the first transmitting power is determined by described the first base station.

In conjunction with first aspect and above-mentioned any one possible implementation thereof, in the 7th kind of possible implementation, described reference signal comprises: pilot signal or synchronizing signal.

Second aspect, provides a kind of method of power control, comprising: the second base station receives the measurement report that user equipment (UE) sends, and wherein said measurement report records with the reference signal of the first transmitting power transmitting according to the first base station; Described the second base station is carried out power control according to described measurement report to described the first base station.

In conjunction with second aspect, in the possible implementation of the first, described the first base station and described UE are positioned at the coverage of described the second base station.

In conjunction with second aspect, in the possible implementation of the second, described the second base station is carried out power control according to described measurement report to described the first base station, comprise: according to described measurement report, to described the first base-station transmitting-power control message, described power control messages is used to indicate described the first base station and adjusts transmitting power.

In conjunction with the possible implementation of the second of second aspect or second aspect, in the third possible implementation, described power control messages is carried with lower one: the value of the second transmitting power, is used to indicate described the first base station taking the value of described the second transmitting power as transmitting power; Transmitting power adjusted value, is used to indicate described the first base station and adjusts described the first transmitting power according to described transmitting power adjusted value; Or power adjustment commands, is used to indicate described the first base station and reduces transmitting power.

In conjunction with second aspect, in the 4th kind of possible implementation, described the second base station is carried out power control according to described measurement report to described the first base station, comprising: according to described measurement report, do not send any message to described the first base station, to make described the first base station reduce transmitting power.

In conjunction with second aspect and above-mentioned any one possible implementation thereof, in the 5th kind of possible implementation, described the second base station is carried out power control according to described measurement report to described the first base station, comprise: according to described measurement report, send acknowledge message or do not send any message to described the first base station, to make the first transmitting power described in described the first base station maintain.

In conjunction with second aspect, in the 6th kind of possible implementation, before described the second base station receives the measurement report of user equipment (UE) transmission, also comprise: to described the first base-station transmitting-power Indication message, described power Indication message is used to indicate described the first base station and launches described reference signal with described the first transmitting power.

In conjunction with second aspect and above-mentioned any one possible implementation thereof, in the 7th kind of possible implementation, described reference signal comprises: pilot signal or synchronizing signal.

The third aspect, provides a kind of base station, comprising: transmitting element, for the first transmitting power transmitted reference signal; Power adjustment unit, the power control of the first transmitting power of described base station being carried out for accepting the second base station.

In conjunction with the third aspect, in the possible implementation of the first, described base station is positioned at the coverage of described the second base station.

In conjunction with the possible implementation of the first of the third aspect or the third aspect, in the possible implementation of the second, described base station also comprises receiving element, described power adjustment unit specifically for: by described receiving element receive described second base station send power control messages; Adjust transmitting power according to described power control messages.

In conjunction with the possible implementation of the second of the third aspect or the third aspect, in the third possible implementation, described power control messages is carried with lower one: the value of the second transmitting power, is used to indicate described base station taking the value of described the second transmitting power as transmitting power; Transmitting power adjusted value, is used to indicate described base station and adjusts described the first transmitting power according to described transmitting power adjusted value; Or power adjustment commands, is used to indicate described base station and reduces transmitting power.

In conjunction with the third aspect, in the 4th kind of possible implementation, described power adjustment unit specifically for: do not receive described second base station send any message time, reduce transmitting power.

In conjunction with the third aspect and above-mentioned any one possible implementation thereof, in the 5th kind of possible implementation, described power adjustment unit specifically for: when receive the acknowledge message that described the second base station sends according to described measurement report by described receiving element, maintain described the first transmitting power; Or in the time not receiving any message of described the second base station transmission by described receiving element, maintain described the first transmitting power.

In conjunction with the possible implementation of the first of the third aspect or the third aspect, in the 6th kind of possible implementation, described the first transmitting power is determined by described the second base station and is sent to described the first base station; Or described the first transmitting power is determined by described base station.

In conjunction with the third aspect and above-mentioned any one possible implementation thereof, in the 7th kind of possible implementation, described reference signal comprises: pilot signal or synchronizing signal.

Fourth aspect, provides a kind of base station, comprising: receiving element, and the measurement report sending for receiving user equipment (UE), wherein said measurement report records with the reference signal of the first transmitting power transmitting according to the first base station; Power control unit, for carrying out power control according to described measurement report to described the first base station.

In conjunction with fourth aspect, in the possible implementation of the first, described the first base station and described UE are positioned at the coverage of described base station.

In conjunction with fourth aspect, in the possible implementation of the second, described base station also comprises transmitting element, described power control unit specifically for: according to described measurement report, by described transmitting element, to described the first base-station transmitting-power control message, described power control messages is used to indicate described the first base station and adjusts transmitting power.

In conjunction with the possible implementation of the second of fourth aspect or fourth aspect, in the third possible implementation, described power control messages is carried with lower one: the value of the second transmitting power, is used to indicate described the first base station taking the value of described the second transmitting power as transmitting power; Transmitting power adjusted value, is used to indicate described the first base station and adjusts described the first transmitting power according to described transmitting power adjusted value; Or power adjustment commands, is used to indicate described the first base station and reduces transmitting power

In conjunction with fourth aspect, in the 4th kind of possible implementation, described power control unit also specifically for: according to described measurement report, do not send any message by described transmitting element to described the first base station, with make described first base station reduce transmitting power.

In conjunction with fourth aspect, and above-mentioned any one possible implementation, in the 5th kind of possible implementation, described power control unit also for: according to described measurement report, send acknowledge message or do not send any message by described transmitting element to described the first base station, to make the first transmitting power described in described the first base station maintain.

In conjunction with fourth aspect or fourth aspect second in possible implementation, in the 6th in possible implementation, described transmitting element also for: to described the first base-station transmitting-power Indication message, described power Indication message is used to indicate described the first base station and launches described reference signal with described the first transmitting power.

In conjunction with fourth aspect, and above-mentioned any one possible implementation, in the 7th kind of possible implementation, described reference signal comprises: pilot signal or synchronizing signal.

Based on technique scheme, the measurement report that the embodiment of the present invention reports according to UE is adjusted the transmitting power of micro-base station or is determined, thereby can realize the downlink power control of macro base station to micro-base station.

Brief description of the drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, to the accompanying drawing of required use in the embodiment of the present invention be briefly described below, apparently, described accompanying drawing is only some embodiments of the present invention below, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the indicative flowchart of the method for the power control of one embodiment of the invention.

Fig. 2 is the indicative flowchart of the method for the power control of another embodiment of the present invention.

Fig. 3 is the schematic interaction figure of the method for the power control of one embodiment of the invention.

Fig. 4 is the schematic interaction figure of the method for the power control of another embodiment of the present invention.

Fig. 5 is the schematic interaction figure of the method for the power control of another embodiment of the present invention.

Fig. 6 is the schematic interaction figure of the method for the power control of another embodiment of the present invention.

Fig. 7 is the schematic interaction figure of the method for the power control of another embodiment of the present invention.

Fig. 8 is the schematic interaction figure of the method for the power control of another embodiment of the present invention.

Fig. 9 is the schematic block diagram of the base station of one embodiment of the invention.

Figure 10 is the schematic block diagram of the base station of one embodiment of the invention.

Figure 11 is the schematic block diagram of the base station of another embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, should belong to the scope of protection of the invention.

Technical scheme of the present invention, can be applied to various communication systems, for example: global system for mobile communications (GSM, Global System of Mobile communication), code division multiple access (CDMA, Code Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access Wireless), GPRS (GPRS, General Packet Radio Service), Long Term Evolution (LTE, Long Term Evolution), senior Long Term Evolution (Long Term Evolution-Advanced, LTE-A) etc.

Subscriber equipment (UE, User Equipment), also can be referred to as mobile terminal (Mobile Terminal), mobile subscriber equipment etc., can be through wireless access network (for example, RAN, Radio Access Network) communicate with one or more core net, subscriber equipment can be mobile terminal, as mobile phone (or being called " honeycomb " phone) with there is the computer of mobile terminal, for example, can be portable, pocket, hand-hold type, mobile device built-in computer or vehicle-mounted, they and wireless access network exchange language and/or data.

Base station can be the base station (BTS, Base Transceiver Station) in GSM or CDMA, also can be the base station (NodeB) in WCDMA, can also be the evolved base station (eNB or e-NodeB, evolutional Node B) in LTE and LTE-A, the present invention limit.

Fig. 1 is the indicative flowchart of the method for the power control of one embodiment of the invention.The method of Fig. 1 is carried out by macro base station Macro.

101, the first base stations are with the first transmitting power transmitted reference signal.Described reference signal can be to issue UE by micro-base station (the first base station).The second base station can be macro base station.Described reference signal can be for being measured measurement report by UE.Such the second base station can know how power control is carried out in the first base station according to the intensity of this reference signal.This UE is the UE under the first base station service not.The intensity reflects of the reference signal that this UE records the annoyance level of the first base station to this UE.

Reference signal comprises pilot signal or synchronizing signal.

The power control that carry out the first transmitting power of the first base station the second base station is accepted in 102, the first base stations.The first base station is positioned at the coverage of the second base station.

Alternatively, as another embodiment, the power control that carry out the first transmitting power of the first base station the second base station is accepted in the first base station, comprising: receive the power control messages that the second base station sends; Adjust transmitting power according to power control messages.Wherein, power control messages is carried with lower one: the value of the second transmitting power, is used to indicate the first base station taking the value of the second transmitting power as transmitting power; Transmitting power adjusted value, is used to indicate the first base station and adjusts the first transmitting power according to transmitting power adjusted value; Or power adjustment commands, is used to indicate the first base station and reduces transmitting power.

Alternatively, as another embodiment, the power control that carry out the first transmitting power of the first base station the second base station is accepted in the first base station, comprising: in the time not receiving any message of the second base station transmission, reduce transmitting power.

Alternatively, as another embodiment, the power control that carry out the first transmitting power of the first base station the second base station is accepted in the first base station, comprising: receive the second base station according to measurement report send acknowledge message time, maintain the first transmitting power; Or in the time not receiving any message of the second base station transmission, maintain the first transmitting power.

Alternatively, as another embodiment, the first transmitting power is determined by the second base station and is sent to the first base station; Or the first transmitting power is determined by the first base station.

Therefore, the embodiment of the present invention is used a transmitting power to attempt, macro base station is by the interference that judges that micro-base station is used the transmitting power of this trial to bring peripheral cell, decide the transmitting power of micro-base station is adjusted or maintained current transmitting power, thereby realized the downlink power control of macro base station to micro-base station.

Fig. 2 is the indicative flowchart of the method for the power control of another embodiment of the present invention.The method of Fig. 2 can be carried out by micro-base station.

201, the second base stations (can be macro base station) receive the measurement report that user equipment (UE) sends, and wherein measurement report records with the reference signal of the first transmitting power transmitting according to the first base station (can be micro-base station).Described reference signal can be for being measured measurement report by UE.Such the second base station can know how power control is carried out in the first base station according to the intensity of this reference signal.This UE is the UE under the first base station service not.The intensity reflects of the reference signal that this UE records the annoyance level of the first base station to this UE.

The first base station and UE are positioned at the coverage of the second base station.Reference signal comprises pilot signal or synchronizing signal.

202, the second base stations are carried out power control according to measurement report to the first base station.

Alternatively, as an embodiment, the second base station is carried out power control according to measurement report to the first base station, comprising: according to measurement report, to the first base-station transmitting-power control message, power control messages is used to indicate the first base station and adjusts transmitting power.Wherein, power control messages is carried with lower one: the value of the second transmitting power, is used to indicate the first base station taking the value of the second transmitting power as transmitting power; Transmitting power adjusted value, is used to indicate the first base station and adjusts the first transmitting power according to transmitting power adjusted value; Or power adjustment commands, is used to indicate the first base station and reduces transmitting power.

Alternatively, as another embodiment, the second base station is carried out power control according to measurement report to the first base station, comprising: according to measurement report, do not send any message to the first base station, to make the first base station reduce transmitting power.

Alternatively, as another embodiment, the second base station is carried out power control according to measurement report to the first base station, comprising: according to measurement report, send acknowledge message or do not send any message, to make first base station maintain the first transmitting power to the first base station.

Alternatively, as another embodiment, the second base station also comprises: to the first base-station transmitting-power Indication message, power Indication message is used to indicate the first base station with the first transmitting power transmitted reference signal before receiving the measurement report of user equipment (UE) transmission.

The embodiment of the present invention is taking LTE system as example, and the second base station is macro base station, the first Shi Wei base station, base station, and wherein the first base station is positioned at the coverage of the second base station, that is to say, and this micro-base station is by this macro base station control.In addition, UE belongs to adjacent micro-base station of macro base station or this micro-base station,

301, macro base station is to micro-base-station transmitting-power Indication message.

When micro-base station is waken up, or micro-base station has been while having increased a carrier wave or Serving cell, and macro base station is to micro-base-station transmitting-power Indication message, and this power Indication message carries Initial Trans, for example, and 21dB.This Initial Trans can be that macro base station is specified, or system is predefined, or history value (when micro-base station was waken up or increased carrier wave or Serving cell last time, the initial power that macro base station issues).This message can be passed through physical layer, and the signaling of media access control (Medium Access Control, MAC) layer or Radio Resource control (Radio Recourse Control, RRC) layer sends, and the present invention is not restricted this.

302, micro-base station transmitted reference signal.

Micro-base station receives after the power Indication message of macro base station transmission, uses Initial Trans transmitting pilot tone or synchronizing signal, the i.e. transmitted reference signal of in message, carrying.Should be understood that pilot signal can be public reference signal (Common Reference Signal, CRS), channel state information reference signals

(Channel State Information-Reference Signal, CSI-RS), demodulated reference signal (Demodulation Reference Signal, or location reference signals (Positioning Reference Signal DM-RS), PRS) etc., synchronizing signal can be master sync signal (Primary Synchronization Signal, or auxiliary synchronous signals (Secondary Synchronization Signal PSS), SSS), the present invention is not restricted this.

In addition, as the Poewr control method of a circulation, above-mentioned reference signal also may be launched with the transmitting power after adjusting in following step 305b, or according to following step 306b, launch with current transmitting power, so that realize the dynamic adjustment of micro-base station transmitting power.

303, UE sends measurement report to macro base station.

UE under other micro-base station (the 3rd base station) around, micro-base station is receiving after the reference signal of this micro-base station transmitting, to Reference Signal Received Power (Reference Signal Received Power, and/or Reference Signal Received Quality (Reference Signal Received Quality RSRP), and/or received signal strength indicator (Received Signal Strength Indicator RSRQ), RSSI) measure, and measurement result is reported to macro base station.

In addition, UE is except reporting the signal measurement result of the first base station (being the adjacent base station of the serving BS of UE), whether the signal measurement result that also needs to report the 3rd base station (being the serving BS of UE), need to adjust transmitting power so that macro base station judges the first base station.For example, the first base station transmitting be CRS, UE periodic measurement and report the RSRP of this community (the 3rd base station) and neighbor cell (the first base station) and/or RSRQ and/or RSSI to macro base station.

304, macro base station determines whether to need to adjust transmitting power.

Whether the comprehensive decision of measurement report that macro base station reports according to UE needs to adjust the transmitting power of micro-base station.If macro base station thinks that micro-base station has interfered with the UE under micro-base station around, the transmitting power of micro-base station is adjusted, for example, there is the RSRQ of UE to be less than XdB, or there is the RSSI of UE to be greater than XdB, or the average RSRQ of UE is less than XdB, or the average RSSI of UE is greater than XdB, or there is the RSRQ of the UE that exceedes 10% to be less than XdB, or there is the RSSI of the UE that exceedes 10% to be greater than XdB, or the RSRQ changing value that has UE to receive reference signal front and back is greater than XdB, or the RSSI changing value that has UE to receive reference signal front and back is greater than XdB, or the average RSRQ changing value that UE receives before and after reference signal is greater than XdB, or the average RSSI changing value that UE receives before and after reference signal is greater than XdB, or have and exceed the RSRQ changing value that 10% UE receives before and after reference signal and be greater than XdB, or have and exceed the RSSI changing value that 10% UE receives before and after reference signal and be greater than XdB etc.If macro base station thinks that micro-base station does not interfere with the UE under micro-base station around, for example, there is the RSRQ of UE to be greater than XdB, or there is the RSSI of UE to be less than XdB, or the average RSRQ of UE is greater than XdB, or the average RSSI of UE is less than XdB, or there is the RSRQ of the UE that exceedes 10% to be greater than XdB, or there is the RSSI of the UE that exceedes 10% to be less than XdB, or the RSRQ changing value that has UE to receive reference signal front and back is less than XdB, or the RSSI changing value that has UE to receive reference signal front and back is less than XdB, or the average RSRQ changing value that UE receives before and after reference signal is less than XdB, or the average RSSI changing value that UE receives before and after reference signal is less than XdB, or have and exceed the RSRQ changing value that 10% UE receives before and after reference signal and be less than XdB, or have and exceed the RSSI changing value that 10% UE receives before and after reference signal and be less than XdB etc., the transmitting power of micro-base station is not adjusted.Wherein XdB can be a predefined threshold value.Should be understood that in the embodiment of the present invention, macro base station judges whether micro-base station causes more strongly disturbing method to be not limited to this to UE around, and the present invention is not construed as limiting this.

305a, macro base station is to micro-base-station transmitting-power control message.

In the time that the transmitting power of micro-base station need to be adjusted, macro base station can be determined power control messages to the annoyance level of UE according to micro-base station, and this power control messages is handed down to micro-base station.Particularly, this power control messages can be carried transmission power level P(the second transmitting power after adjustment), or transmitting power adjusted value Δ P, or power adjustment commands.Particularly, the transmission power level P after above-mentioned adjustment can be a performance number particularly, and for example P=20dB can directly replace or cover the current transmitting power in micro-base station.Above-mentioned transmitting power adjusted value Δ P can be an increment, and for example Δ P=-2dB is used to indicate micro-base station and reduces 2dB on current transmitting power basis.Above-mentioned power adjustment commands can be a warning message that contains less bit, for example, only contain 1 bit, be used to indicate micro-base station and reduce a power rank, or contain multiple bits and be used to indicate the reduction of micro-base station or multiple ranks that raise, wherein the power rank of micro-base station can be predefined a series of performance number, can be also that predefined power is adjusted step-length (for example step-length is 2dB).

305b, transmitting power is adjusted in micro-base station.

Micro-base station receives after power control information, according to the transmission power level P after the adjustment of carrying in this power control information, or transmitting power adjusted value Δ P, or power adjustment commands is carried out power adjustment.Particularly, if that carry in power control information is the transmission power level P after adjusting, the transmission power level P transmitted reference signal (be pilot tone or synchronizing signal) of micro-base station after with this adjustment, if that carry in power control information is transmitting power adjusted value Δ P, Δ P is adjusted in micro-base station on current transmitting power basis, with the power emission reference signal (being pilot tone or synchronizing signal) after adjusting, if what carry in power control information is power adjustment commands, micro-base station is according to this power adjustment commands Modulating Power rank, and with the power rank transmitted reference signal (being pilot tone or synchronizing signal) after adjusting.Wherein, the power rank of micro-base station can be pre-configured, for example, Level 1=21dB, Level 2=20dB, Level 3=19dB etc., suppose that current power grade is Level 1, the power adjustment commands that micro-base station receives indicates micro-base station to reduce a power rank, and transmitting power is adjusted to Level 2 by micro-base station, and using 20dB as transmitting power.Should be understood that above-mentioned power rank can not be also equidistant, can carry out arbitrarily predefine, the present invention is not construed as limiting this.In addition, step-length (as 2dB) can also be adjusted by power of predefine in micro-base station, raises or reduce one or more step-length when adjustment according to power adjustment commands.

Carry out after power adjustment micro-base station, carry out transmitted reference signal with the transmitting power after adjusting, get back to above-mentioned steps 302, form the power adjustment process of a circulation, until macro base station thinks that micro-base station adjusts to a suitable transmitting power (not interfering with the UE of adjacent base station).

306a, macro base station sends acknowledge message to micro-base station.

In the time that the transmitting power of micro-base station does not need to adjust, macro base station can send an acknowledge message to micro-base station, this acknowledge message can be an ACK(Acknowledgment) signal, or the confirmation signal of other arbitrary forms, the present invention is not construed as limiting this.

306b, micro-base station maintain current transmit power.

Micro-base station receives the confirmation after information, maintains current transmitting power, and the UE under this base station provides service taking this transmitting power as operating power.

In addition, as the Poewr control method of a circulation, above-mentioned steps 302 can also, by current operating power transmitted reference signal, be got back in micro-base station, so that realize the dynamic adjustment of micro-base station transmitting power.

It should be noted that, in the present embodiment, step 305a-305b and 306a-306b are alternatives in single power controlled circulation, while needing to adjust micro-base station transmitting power, perform step 305a-305b, while not needing to adjust micro-base station transmitting power, perform step 306a-306b, all get back to afterwards step 302 and start next circulation.

The embodiment of the present invention is taking LTE system as example, and the second base station is macro base station, the first Shi Wei base station, base station, and wherein the first base station is positioned at the coverage of the second base station, that is to say, and this micro-base station is by this macro base station control.In addition, UE belongs to adjacent micro-base station of macro base station or this micro-base station.

401, macro base station is to micro-base-station transmitting-power Indication message.

When micro-base station is waken up, or micro-base station has been while having increased a carrier wave or Serving cell, and macro base station is to micro-base-station transmitting-power Indication message, and this power Indication message carries Initial Trans, for example, and 21dB.This Initial Trans can be that macro base station is specified, or system is predefined, or history value (when micro-base station was waken up or increased carrier wave or Serving cell last time, the initial power that macro base station issues).This message can be passed through physical layer, MAC layer or Radio Recourse Control, and the signaling of rrc layer sends, and the present invention is not restricted this.

402, micro-base station transmitted reference signal.

Micro-base station receives after the power Indication message of macro base station transmission, uses Initial Trans transmitting pilot tone or synchronizing signal, the i.e. transmitted reference signal of in message, carrying.Should be understood that pilot signal can be CRS, CSI-RS, DM-RS or PRS etc., synchronizing signal can be PSS or SSS, and the present invention is not restricted this.

In addition, as the Poewr control method of a circulation, above-mentioned reference signal also may be launched with the transmitting power after adjusting in following step 405b, or according to following step 406, launch with current transmitting power, so that realize the dynamic adjustment of micro-base station transmitting power.

403, UE sends measurement report to macro base station.

The lower UE in other micro-base station (the 3rd base station) around, micro-base station is receiving after the reference signal of launching this micro-base station, RSRP and/or RSRQ and/or RSSI is measured, and measurement result is reported to macro base station.

In addition, UE is except reporting the signal measurement result of the first base station (being the adjacent base station of the serving BS of UE), whether the signal measurement result that also needs to report the 3rd base station (being the serving BS of UE), need to adjust transmitting power so that macro base station judges the first base station.For example, the first base station transmitting be CRS, UE periodic measurement and report the RSRP of this community (the 3rd base station) or neighbor cell (the first base station) and/or RSRQ and/or RSSI to macro base station.

404, macro base station determines whether to need to adjust transmitting power.

405a, macro base station is to micro-base-station transmitting-power control message.

In the time that the transmitting power of micro-base station need to be adjusted, macro base station can be determined power control messages to the annoyance level of UE according to micro-base station, and this power control messages is handed down to micro-base station.Particularly, this power control messages can be carried transmission power level P(the second transmitting power after adjustment), or transmitting power adjusted value Δ P, or power adjustment commands.Particularly, the transmission power level P after above-mentioned adjustment can be a performance number particularly, and for example P=20dB can directly replace or cover the current transmitting power in micro-base station.Above-mentioned transmitting power adjusted value Δ P can be an increment, and for example Δ P=-2dB is used to indicate micro-base station and reduces 2dB on current transmitting power basis.Above-mentioned power adjustment commands can be a warning message that contains less bit, for example, only contain 1 bit 0, be used to indicate micro-base station and reduce a power rank, or contain multiple bits and be used to indicate the reduction of micro-base station or multiple ranks that raise, wherein the power rank of micro-base station can be predefined a series of performance number, can be also that predefined power is adjusted step-length (for example step-length is 2dB).

405b, transmitting power is adjusted in micro-base station.

Carry out after power adjustment micro-base station, with the transmitting power transmitted reference signal after adjusting, get back to above-mentioned steps 402, form the power adjustment process of a circulation, until macro base station thinks that micro-base station adjusts to a suitable transmitting power (not interfering with the UE of adjacent base station).

406, micro-base station maintain current transmit power.

In the time that the transmitting power of micro-base station does not need to adjust, macro base station can not send any message.That is to say, in the time that any information is not received in micro-base station, maintain current transmitting power, and the UE under this base station provides service taking this transmitting power as operating power.

In addition, as the Poewr control method of a circulation, above-mentioned steps 402 can also, by current operating power transmitted reference signal, be got back in micro-base station, so that realize the dynamic adjustment of micro-base station transmitting power.

It should be noted that, in the present embodiment, step 405a-405b and 406 is alternative in single power controlled circulation, while needing to adjust micro-base station transmitting power, perform step 405a-405b, while not needing to adjust micro-base station transmitting power, perform step 406, all get back to afterwards step 402 and start next circulation.

501, macro base station is to micro-base-station transmitting-power Indication message.

When micro-base station is waken up, or micro-base station has been while having increased a carrier wave or Serving cell, and macro base station is to micro-base-station transmitting-power Indication message, and this power Indication message carries Initial Trans, for example, and 21dB.This Initial Trans can be that macro base station is specified, or system is predefined, or history value (when micro-base station was waken up or increased carrier wave or Serving cell last time, the initial power that macro base station issues).This message can be passed through physical layer, and the signaling of MAC layer or rrc layer sends, and the present invention is not restricted this.

502, micro-base station transmitted reference signal.

In addition, as the Poewr control method of a circulation, above-mentioned reference signal also may be launched with the transmitting power after adjusting in following step 505, or according to following step 506b, launch with current transmitting power, so that realize the dynamic adjustment of micro-base station transmitting power.

503, UE sends measurement report to macro base station.

504, macro base station determines whether to need to adjust transmitting power.

505, transmitting power is adjusted in micro-base station.

In the time that macro base station thinks that the transmitting power of micro-base station need to be adjusted, macro base station can not send any information.That is to say, in the time that micro-base station does not receive any message, automatically reduce a power rank, and with the power rank transmitted reference signal (being pilot tone or synchronizing signal) after reducing.Wherein, the power rank of micro-base station can be pre-configured, for example, Level 1=21dB, Level 2=20dB, Level3=19dB etc., suppose that current power grade is Level 1, within the predefined time cycle, do not receive when micro-base station any information that macro base station sends, power rank is reduced to Level 2, and using 20dB as transmitting power.Should be understood that above-mentioned power rank can not be also equidistant, can carry out arbitrarily predefine, the present invention is not construed as limiting this.In addition, step-length can also be adjusted by power of predefine in micro-base station, when micro-base station does not receive any information of macro base station transmission, automatically reduce the power of a power adjustment step-length, for example, power is adjusted step-length and is set to 2dB, and current power is 21dB, and micro-base station can be adjusted into 19dB by transmitting power.

Carry out after power adjustment micro-base station, carry out transmitted reference signal with the transmitting power after adjusting, get back to above-mentioned steps 502, form the power adjustment process of a circulation, until macro base station thinks that micro-base station adjusts to a suitable transmitting power (not interfering with the UE of adjacent base station).

506a, macro base station sends acknowledge message to micro-base station.

506b, micro-base station maintain current transmit power.

In addition, as the Poewr control method of a circulation, above-mentioned steps 502 can also, by current operating power transmitted reference signal, be got back in micro-base station, so that realize the dynamic adjustment of micro-base station transmitting power.

It should be noted that, in the present embodiment, step 505 and 506a-506b are alternatives in single power controlled circulation, while needing to adjust micro-base station transmitting power, perform step 505, while not needing to adjust micro-base station transmitting power, perform step 506a-506b, all get back to afterwards step 502 and start next circulation.

601, micro-base station transmitted reference signal.

When micro-base station is waken up, or when micro-base station has increased a carrier wave or Serving cell, micro-base station is used the transmitting power after history value (if once normally working before this Pico) or an Initial Trans (parameter relevant to the device capabilities of Pico or pre-configured parameter) or adjustment to launch pilot tone or synchronizing signal, i.e. transmitted reference signal as Initial Trans.Should understand, pilot signal can be public reference signal (Common Reference Signal, CRS), channel state information reference signals (Channel State Information-Reference Signal, CSI-RS), demodulated reference signal (Demodulation Reference Signal, or location reference signals (Positioning Reference Signal DM-RS), PRS) etc., synchronizing signal can be master sync signal (Primary Synchronization Signal, or auxiliary synchronous signals (Secondary Synchronization Signal PSS), SSS), the present invention is not restricted this.

In addition, as the Poewr control method of a circulation, above-mentioned reference signal also may be launched with the transmitting power after adjusting in following step 604b, or according to following step 605b, launch with current transmitting power, so that realize the dynamic adjustment of micro-base station transmitting power.

602, UE sends measurement report to macro base station.

603, macro base station determines whether to need to adjust transmitting power.

604a, macro base station is to micro-base-station transmitting-power control message.

604b, transmitting power is adjusted in micro-base station.

Carry out after power adjustment micro-base station, carry out transmitted reference signal with the transmitting power after adjusting, get back to above-mentioned steps 601, form the power adjustment process of a circulation, until macro base station thinks that micro-base station adjusts to a suitable transmitting power (not interfering with the UE of adjacent base station).

605a, macro base station sends acknowledge message to micro-base station.

605b, micro-base station maintain current transmit power.

In addition, as the Poewr control method of a circulation, above-mentioned steps 601 can also, by current operating power transmitted reference signal, be got back in micro-base station, so that realize the dynamic adjustment of micro-base station transmitting power.

It should be noted that, in the present embodiment, step 604a-604b and 605a-605b are alternatives in single power controlled circulation, while needing to adjust micro-base station transmitting power, perform step 604a-604b, while not needing to adjust micro-base station transmitting power, perform step 605a-605b, all get back to afterwards step 601 and start next circulation.

701, micro-base station transmitted reference signal.

In addition, as the Poewr control method of a circulation, above-mentioned reference signal also may be launched with the transmitting power after adjusting in following step 704b, or according to following step 705, launch with current transmitting power, so that realize the dynamic adjustment of micro-base station transmitting power.

702, UE sends measurement report to macro base station.

703, macro base station determines whether to need to adjust transmitting power.

704a, macro base station is to micro-base-station transmitting-power control message.

704b, transmitting power is adjusted in micro-base station.

Carry out after power adjustment micro-base station, carry out transmitted reference signal with the transmitting power after adjusting, get back to above-mentioned steps 701, form the power adjustment process of a circulation, until macro base station thinks that micro-base station adjusts to a suitable transmitting power (not interfering with the UE of adjacent base station).

705, micro-base station maintain current transmit power.

In addition, as the Poewr control method of a circulation, above-mentioned steps 701 can also, by current operating power transmitted reference signal, be got back in micro-base station, so that realize the dynamic adjustment of micro-base station transmitting power.

It should be noted that, in the present embodiment, step 704a-704b and 705 is alternative in single power controlled circulation, while needing to adjust micro-base station transmitting power, perform step 704a-704b, while not needing to adjust micro-base station transmitting power, perform step 705, all get back to afterwards step 701 and start next circulation.

801, micro-base station transmitted reference signal.

In addition, as the Poewr control method of a circulation, above-mentioned reference signal also may be launched with the transmitting power after adjusting in following step 804, or according to following step 805b, launch with current transmitting power, so that realize the dynamic adjustment of micro-base station transmitting power.

802, UE sends measurement report to macro base station.

803, macro base station determines whether to need to adjust transmitting power.

804, transmitting power is adjusted in micro-base station.

Carry out after power adjustment micro-base station, carry out transmitted reference signal with the transmitting power after adjusting, get back to above-mentioned steps 801, form the power adjustment process of a circulation, until macro base station thinks that micro-base station adjusts to a suitable transmitting power (not interfering with the UE of adjacent base station).

805a, macro base station sends acknowledge message to micro-base station.

805b, micro-base station maintain current transmit power.

In addition, as the Poewr control method of a circulation, above-mentioned steps 801 can also, by current operating power transmitted reference signal, be got back in micro-base station, so that realize the dynamic adjustment of micro-base station transmitting power.

It should be noted that, in the present embodiment, step 804 and 805a-805b are alternatives in single power controlled circulation, while needing to adjust micro-base station transmitting power, perform step 804, while not needing to adjust micro-base station transmitting power, perform step 805a-805b, all get back to afterwards step 801 and start next circulation.

Fig. 9 is the schematic block diagram of the base station of one embodiment of the invention.The base station 900 of Fig. 9 comprises transmitting element 901, power adjustment unit 902 and receiving element 903.

Transmitting element 901 is with the first transmitting power transmitted reference signal; Power adjustment unit 902 is accepted the power control that carry out the first transmitting power of base station 900 the second base station.

Based on above-mentioned base station, the measurement report that the embodiment of the present invention reports according to UE is adjusted the transmitting power of micro-base station or is determined, thereby can realize the downlink power control of macro base station to micro-base station.

Alternatively, as an embodiment, base station 900 is positioned at the coverage of the second base station.The power control messages that power adjustment unit 902 sends specifically for receive the second base station by receiving element 903, adjusts transmitting power according to power control messages.Wherein, power control messages is carried with lower one: the value of the second transmitting power, is used to indicate described base station 900 taking the value of described the second transmitting power as transmitting power; Transmitting power adjusted value, is used to indicate described base station 900 and adjusts described the first transmitting power according to described transmitting power adjusted value; Or power adjustment commands, is used to indicate described base station 900 and reduces transmitting power.

Alternatively, as another embodiment, power adjustment unit 902 specifically for: do not receive described second base station send any message time, reduce transmitting power.

Alternatively, as another embodiment, power adjustment unit 902 specifically for: receive by receiving element 901 the second base station according to measurement report send acknowledge message time, maintain the first transmitting power; Or in the time not receiving any message of the second base station transmission by receiving element 901, maintain the first transmitting power.

Alternatively, as another embodiment, the first transmitting power is determined by the second base station and is sent to base station 900; Or the first transmitting power is determined by base station 900.

Alternatively, as another embodiment, reference signal comprises: pilot signal or synchronizing signal.

Figure 10 is the schematic block diagram of the base station of one embodiment of the invention.The base station 1000 of Figure 10 comprises receiving element 1001, power control unit 1002 and transmitting element 1003.

Receiving element 1001 receives the measurement report that UE sends, and wherein measurement report records with the reference signal of the first transmitting power transmitting according to the first base station.Power control unit 1002, for carrying out power control according to measurement report to the first base station.

Alternatively, as an embodiment, the first base station and UE are positioned at the coverage of base station 1000.Power control unit 1002 specifically for: according to measurement report, by transmitting element 1003 to the first base-station transmitting-power control message, power control messages be used to indicate first base station adjust transmitting power.Wherein, power control messages is carried with lower one: the value of the second transmitting power, is used to indicate the first base station taking the value of the second transmitting power as transmitting power; Transmitting power adjusted value, is used to indicate the first base station and adjusts the first transmitting power according to transmitting power adjusted value; Or power adjustment commands, is used to indicate the first base station and reduces transmitting power.

Alternatively, as another embodiment, power control unit 1002 also specifically for: according to measurement report, do not send any message by transmitting element 1003 to the first base station, with make first base station reduce transmitting power.

Alternatively, as another embodiment, power control unit 1002 also specifically for: according to measurement report, send acknowledge message or do not send any message by transmitting element 1003 to the first base station, to make first base station maintain the first transmitting power.

Alternatively, as another embodiment, described transmitting element 1003 also for: to the first base-station transmitting-power Indication message, power Indication message is used to indicate the first base station with the first transmitting power transmitted reference signal.Wherein reference signal comprises: pilot signal or synchronizing signal.

The equipment of Fig. 9 or Figure 10 can be carried out the flow process of described method, and the function section of its each unit is referring to the description of embodiment of the method before.

Figure 11 is the schematic block diagram of the base station of another embodiment of the present invention.The base station 1100 of Figure 11 comprises processor 1101 and memory 1102.Processor 1101 is connected by bus system 1103 with memory 1102.

Memory 1102 makes processor 1101 carry out the order of following operation for storing: with the first transmitting power transmitted reference signal; Accept the power control that carry out the first transmitting power of base station 1100 the second base station.

Memory 1102 can also be used for storing the order that makes the following operation of processor 1101 execution: receive the measurement report that UE sends, the reference signal that wherein measurement report is launched with the first transmitting power according to the first base station records; According to measurement report, power control is carried out in the first base station.

In addition, base station 1100 can also comprise radiating circuit 1104, receiving circuit 1105 and antenna 1106 etc.Processor 1101 is controlled the operation of base station 1100, and processor 1101 can also be called CPU(Central Processing Unit, CPU).Memory 1102 can comprise read-only memory and random access memory, and provides instruction and data to processor 1101.A part for memory 1102 can also comprise nonvolatile RAM (NVRAM).In concrete application, radiating circuit 1104 and receiving circuit 1105 can be coupled to antenna 1106.Each assembly of base station 1100 is coupled by bus system 1103, and wherein bus system 1103, except comprising data/address bus, can also comprise power bus, control bus and status signal bus in addition etc.But for the purpose of clearly demonstrating, in the drawings various buses are all designated as to bus system 1103.

The method that the invention described above embodiment discloses can be applied in processor 1101, or is realized by processor 1101.Processor 1101 may be a kind of integrated circuit (IC) chip, has the disposal ability of signal.In implementation procedure, each step of said method can complete by the instruction of the integrated logic circuit of the hardware in processor 1101 or software form.Above-mentioned processor 1101 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic device, discrete hardware components.Can realize or carry out disclosed each method, step and logic diagram in the embodiment of the present invention.General processor can be that microprocessor or this processor can be also the processors of any routine etc.Can directly be presented as that in conjunction with the step of the disclosed method of the embodiment of the present invention hardware decoding processor is complete, or complete with the hardware in decoding processor and software module combination.Software module can be positioned at random asccess memory, and flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory 1102, and the information in processor 1101 read memories 1102 completes the step of said method in conjunction with its hardware.

Those of ordinary skill in the art can recognize, in conjunction with the various method steps of describing in embodiment disclosed herein and unit, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software is clearly described, step and the composition of each embodiment described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Those of ordinary skill in the art can realize described function with distinct methods to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.

The software program that the method for describing in conjunction with embodiment disclosed herein or step can use hardware, processor to carry out, or the combination of the two is implemented.Software program can be placed in the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.

Although the present invention be have been described in detail by reference to accompanying drawing mode in conjunction with the preferred embodiments, the present invention is not limited to this.Without departing from the spirit and substance of the premise in the present invention, those of ordinary skill in the art can carry out to embodiments of the invention amendment or the replacement of various equivalences, and these amendments or replacement all should be in covering scopes of the present invention.

Claims

1. a method for power control, is characterized in that, comprising:

The first base station is with the first transmitting power transmitted reference signal;

The power control that carry out the first transmitting power of described the first base station the second base station is accepted in described the first base station.

2. method according to claim 1, is characterized in that, described the first base station is positioned at the coverage of described the second base station.

3. method according to claim 1, is characterized in that, the power control that carry out the first transmitting power of described the first base station the second base station is accepted in described the first base station, comprising:

Receive the power control messages that described the second base station sends;

Adjust transmitting power according to described power control messages.

4. method according to claim 3, is characterized in that, described power control messages is carried with lower one:

The value of the second transmitting power, is used to indicate described the first base station taking the value of described the second transmitting power as transmitting power;

Transmitting power adjusted value, is used to indicate described the first base station and adjusts described the first transmitting power according to described transmitting power adjusted value; Or

Power adjustment commands, is used to indicate described the first base station and reduces transmitting power.

5. method according to claim 1, is characterized in that, the power control that carry out the first transmitting power of described the first base station the second base station is accepted in described the first base station, comprising:

In the time not receiving any message of described the second base station transmission, reduce transmitting power.

6. according to the method described in any one in claim 1 to 5, it is characterized in that, the power control that carry out the first transmitting power of described the first base station the second base station is accepted in described the first base station, comprising:

In the time receiving the acknowledge message that described the second base station sends according to described measurement report, maintain described the first transmitting power; Or

In the time not receiving any message of described the second base station transmission, maintain described the first transmitting power.

7. method according to claim 1, is characterized in that, described the first transmitting power is determined by described the second base station and sent to described the first base station; Or

Described the first transmitting power is determined by described the first base station.

8. according to the method described in any one in claim 1 to 7, it is characterized in that, described reference signal comprises: pilot signal or synchronizing signal.

9. a method for power control, is characterized in that, comprising:

The second base station receives the measurement report that user equipment (UE) sends, and wherein said measurement report records with the reference signal of the first transmitting power transmitting according to the first base station;

Described the second base station is carried out power control according to described measurement report to described the first base station.

10. method according to claim 9, is characterized in that, described the first base station and described UE are positioned at the coverage of described the second base station.

11. methods according to claim 9, is characterized in that, described the second base station is carried out power control according to described measurement report to described the first base station, comprising:

According to described measurement report, to described the first base-station transmitting-power control message, described power control messages is used to indicate described the first base station and adjusts transmitting power.

12. methods according to claim 11, is characterized in that, described power control messages is carried with lower one:

13. methods according to claim 9, is characterized in that, described the second base station is carried out power control according to described measurement report to described the first base station, comprising:

According to described measurement report, do not send any message to described the first base station, to make described the first base station reduce transmitting power.

14. according to the method described in any one in claim 9 to 13, it is characterized in that, described the second base station is carried out power control according to described measurement report to described the first base station, comprising:

According to described measurement report, send acknowledge message or do not send any message to described the first base station, to make the first transmitting power described in described the first base station maintain.

15. methods according to claim 9, is characterized in that, described the second base station also comprises before receiving the measurement report of user equipment (UE) transmission:

To described the first base-station transmitting-power Indication message, described power Indication message is used to indicate described the first base station and launches described reference signal with described the first transmitting power.

16. according to the method described in any one in claim 9 to 15, it is characterized in that, described reference signal comprises: pilot signal or synchronizing signal.

17. 1 kinds of base stations, is characterized in that, comprising:

Transmitting element, for the first transmitting power transmitted reference signal;

Power adjustment unit, the power control of the first transmitting power of described base station being carried out for accepting the second base station.

18. base stations according to claim 17, is characterized in that, described base station is positioned at the coverage of described the second base station.

19. base stations according to claim 17, is characterized in that, described base station also comprises receiving element, described power adjustment unit specifically for:

Receive by described receiving element the power control messages that described the second base station sends;

Adjust transmitting power according to described power control messages.

20. base stations according to claim 19, is characterized in that, described power control messages is carried with lower one:

The value of the second transmitting power, is used to indicate described base station taking the value of described the second transmitting power as transmitting power;

Transmitting power adjusted value, is used to indicate described base station and adjusts described the first transmitting power according to described transmitting power adjusted value; Or

Power adjustment commands, is used to indicate described base station and reduces transmitting power.

21. base stations according to claim 17, is characterized in that, described power adjustment unit specifically for:

22. according to claim 17 to the base station described in any one in 21, it is characterized in that, described power adjustment unit specifically for:

When receive the acknowledge message that described the second base station sends according to described measurement report by described receiving element, maintain described the first transmitting power; Or

In the time not receiving any message of described the second base station transmission by described receiving element, maintain described the first transmitting power.

23. base stations according to claim 17, is characterized in that, described the first transmitting power is determined by described the second base station and sent to described the first base station; Or

Described the first transmitting power is determined by described base station.

24. according to claim 17 to the base station described in any one in 23, it is characterized in that, described reference signal comprises: pilot signal or synchronizing signal.

25. 1 kinds of base stations, is characterized in that, comprising:

Receiving element, the measurement report sending for receiving user equipment (UE), wherein said measurement report records with the reference signal of the first transmitting power transmitting according to the first base station;

Power control unit, for carrying out power control according to described measurement report to described the first base station.

26. base stations according to claim 25, is characterized in that, described the first base station and described UE are positioned at the coverage of described base station.

27. base stations according to claim 25, is characterized in that, described base station also comprises transmitting element, described power control unit specifically for:

According to described measurement report, by described transmitting element, to described the first base-station transmitting-power control message, described power control messages is used to indicate described the first base station and adjusts transmitting power.

28. base stations according to claim 27, is characterized in that, described power control messages is carried with lower one:

29. base stations according to claim 25, is characterized in that, described power control unit also specifically for:

According to described measurement report, do not send any message by described transmitting element to described the first base station, to make described the first base station reduce transmitting power.

30. according to the base station described in any one in claim 25 to 29, it is characterized in that, described power control unit also for:

According to described measurement report, send acknowledge message or do not send any message by described transmitting element to described the first base station, to make the first transmitting power described in described the first base station maintain.

31. base stations according to claim 27, is characterized in that, described transmitting element also for:

32. according to the base station described in any one in claim 25 to 31, it is characterized in that, described reference signal comprises: pilot signal or synchronizing signal.