CN104255073B - The transmitted power control method and its device of uplink detection reference signal - Google Patents

The transmitted power control method and its device of uplink detection reference signal Download PDF

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Publication number
CN104255073B
CN104255073B CN201280072704.9A CN201280072704A CN104255073B CN 104255073 B CN104255073 B CN 104255073B CN 201280072704 A CN201280072704 A CN 201280072704A CN 104255073 B CN104255073 B CN 104255073B
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user equipment
power control
heterogeneous network
difference
network user
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CN104255073A (en
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徐月巧
王轶
周华
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Fujitsu Ltd
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Fujitsu Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff

Abstract

A kind of transmitted power control method of uplink detection reference signal is used for multipoint cooperative (CoMP) system, when the downlink sending point of CoMP user equipment is with uplink receiving point difference, the method includes：It is adjusted using the closed-loop power control value that the opposite downlink sending point of the dedicated close-loop power control initial value of user sends detection reference signal；Wherein, the dedicated close-loop power control initial value of the user is determined according to the difference of the path loss of the downlink sending point of acquisition and uplink receiving point to the CoMP user equipment；Power control value of the current subframe to downlink sending point transmission detection reference signal is determined using the closed-loop power control value, power bias value and open-loop power control value.The power control under heterogeneous network scene can be solved the problems, such as by this method.

Description

The transmitted power control method and its device of uplink detection reference signal
Technical field
The present invention relates to the communications fields, in particular to one kind uplink detection reference signal (Sounding under CoMP scene Reference Signal, SRS) transmitted power control method and its device.
Background technique
At present in Rel-10, it is in the downlink of the user equipment (User Equipment, UE) of a cell (cell) Sending point is identical with uplink receiving point, is all the same base station (Base Station, BS), therefore, which only need to be to the downlink Sending point sends uplink SRS.In the SRS power control mechanism of Rel-10, the power control value for sending SRS can be shared physically Ring opening moiety and closed loop portion in shared channel (Physical Uplink Share Channel, the PUSCH) power control value of row Point, relative to PUSCH, the power control value for sending the SRS increases a power offset values.
In LTE-Advanced (LTE-A) system, cooperative multi-point (Coordinated Multi-point, CoMP) is passed Defeated/reception is included into LTE-A frame as one of key technology.The transmission adjacent using geographical location of cooperation transmission scene Point cooperation sends a signal to user or multipoint cooperative receives uplink signal from the user, for Cell Edge User, especially Signal quality can be improved, expanded the coverage area.In 3GPP LTE-A standardisation process, for uplink/downlink CoMP (UL/DL CoMP following four scene) is defined：
CoMP scene 1 (Scenario 1)：CoMP (Homogenous Network between the site of homogeneous network Intra-site CoMP)；
CoMP scene 2 (Scenario 2)：With height send power wireless remote unit (Remote Radio Head, RRH homogeneous network)；
CoMP scene 3 (Scenario 3)：The heterogeneous network with different community ID of macrocell range distribution low-power RRH Network scene；
CoMP scene 4 (Scenario 4)：The heterogeneous network with same cells ID of macrocell range distribution low-power RRH Network scene.
Wherein, CoMP scene 3 and scene 4 belong to heterogeneous network scene, because of macro base station in macrocell coverage area (macro eNB) and micro-base station (pico eNB) (or distal end has different transmission power without the end of a thread RRH), such as 10MHz band Under wide system, the downlink transmission power of macro eNB is 46dBm, and the transmission power of pico eNB is 30dBm.Therefore according to Existing Reference Signal Received Power (Reference Signal Received Power, RSRP) determines the downlink hair of some UE It send a little, and determines the uplink receiving point of some UE according to the distance of UE to each service point, can have its downlink sending point is The case where macro eNB and uplink receiving point are pico eNB.So can have the asymmetric situation of uplink and downlink coverage area, i.e., The uplink coverage area of pico eNB is greater than its downlink coverage area.
For some CoMP UE, may there is a situation where that the sending point downlink CoMP is different with uplink CoMP receiving point.? Under this heterogeneous network scene, if also using the SRS power control mechanism of Rel-10, the transmission power of SRS or with macro eNB energy Based on the power that can be properly received based on the power being enough properly received or with RRH1, in this way, sending uplink detection reference There can be problem in terms of the power control of signal (Sounding Reference Signal, SRS).That is, if according to macro The target adjustment SRS that eNB is properly received SRS sends power, then the CoMP UE sends SRS, meeting always with higher transmission power The battery of user is reduced, and larger interference is caused to the user serviced in RRH1；If correctly connect according to RRH1 The target adjustment SRS for receiving SRS is sent, then the CoMP UE sends SRS always with lower transmission power, then macro eNB can SRS can be unable to properly receive.There is presently no the schemes of the Power Control Problem of the above-mentioned transmission SRS of specific effective solution.
It should be noted that the above description of the technical background be intended merely to it is convenient to technical solution of the present invention carry out it is clear, Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes of the invention Background technology part is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Summary of the invention
A kind of transmitted power control method for being designed to provide uplink detection reference signal of the embodiment of the present invention and its Device introduces a closed loop power control, opposite downlink sending point hair by the SRS power control to downlink sending point It send the closed-loop power control value of SRS to be adjusted, and is determined according to the closed-loop power control value of adjustment to the downlink sending point and sent out The power control value of uplink SRS is sent, to solve the problems, such as the currently SRS power control present in heterogeneous network.
A kind of transmission power control side of uplink detection reference signal is provided according to an aspect of an embodiment of the present invention Method is used for multipoint cooperative (CoMP) system, when the downlink sending point of CoMP user equipment is with uplink receiving point difference, this method Including：
The detection reference signal sent using the opposite downlink sending point of the dedicated close-loop power control initial value of user Closed-loop power control value is adjusted；Wherein, the dedicated close-loop power control initial value of the user is sent out according to the downlink of acquisition Send a little and uplink receiving point to the CoMP user equipment path loss difference determine；
Determine that current subframe is sent out to the downlink using the closed-loop power control value, power bias value and open-loop power control value Send the power control value for sending detection reference signal.
It is according to an embodiment of the present invention that another aspect provides a kind of transmission power controls of uplink detection reference signal Method is used for multipoint cooperative (CoMP) system, when the downlink sending point of CoMP user equipment is with uplink receiving point difference, the party Method includes：
Serving cell belonging to the CoMP user equipment sends the downlink sending point and the uplink to the CoMP user equipment Receiving point to the CoMP user equipment path loss difference, the difference of the path loss determines that user is dedicated for the user equipment Close-loop power control initial value；Alternatively,
Serving cell belonging to the CoMP user equipment sends the difference for determining the path loss to the CoMP user equipment Relevant information, which determines the difference of the path loss for the user equipment, and is determined according to the difference of the path loss The dedicated close-loop power control initial value of user, the relevant information include：The downlink sending point and uplink receiving point send pilot tone The difference of the transmission power value of the transmission power value of signal or the downlink sending point and uplink receiving point pilot signal transmitted, with And the pilot signal that sends of the downlink sending point and uplink receiving point reaches the difference of the reception power of the CoMP user equipment.
It is according to an embodiment of the present invention another aspect provides a kind of user equipment, which includes：
Adjustment unit, the adjustment unit are configured for opposite under this using the dedicated close-loop power control initial value of user The closed-loop power control value for the detection reference signal that row sending point is sent is adjusted；Wherein, the dedicated closed power of the user The difference that initial value is controlled according to the path loss of the downlink sending point of acquisition and uplink receiving point to the CoMP user equipment is true It is fixed；
First processing units, the first processing units are configured for utilizing the closed-loop power control value, power bias value Power control value of the current subframe to downlink sending point transmission detection reference signal is determined with open-loop power control value.
It is according to an embodiment of the present invention another aspect provides a kind of base station, which includes：
First transmission unit, first transmission unit are configured for sending the downlink sending point to the CoMP user equipment And the uplink receiving point to the CoMP user equipment path loss difference, the difference of the path loss determines for the user equipment The dedicated close-loop power control initial value of user.
It is according to an embodiment of the present invention another aspect provides a kind of base station, which includes：
Second transmission unit, which, which is configured for sending to the CoMP user equipment, determines that the path is damaged The relevant information for the difference lost, the relevant information determine the difference of the path loss for the user equipment, and according to the path loss Difference determine the dedicated close-loop power control initial value of user；
Wherein, which includes：The transmission power value of the downlink sending point and uplink receiving point pilot signal transmitted Or the transmission power value of the downlink sending point and uplink receiving point pilot signal transmitted difference and the downlink sending point with The pilot signal that uplink receiving point is sent reaches the difference of the reception power of the CoMP user equipment.
According to an embodiment of the present invention another aspect provides a kind of computer-readable programs, wherein when in user equipment When middle execution program, which makes computer execute uplink detection reference signal as described above in the user equipment Transmitted power control method.
It is according to an embodiment of the present invention another aspect provides a kind of storage medium for being stored with computer-readable program, Wherein the computer-readable program makes computer execute uplink detection reference signal as described above in a user device Transmitted power control method.
According to an embodiment of the present invention another aspect provides a kind of computer-readable programs, wherein when holding in a base station When row described program, described program makes computer execute the hair of uplink detection reference signal as described above in the base station Send Poewr control method.
It is according to an embodiment of the present invention another aspect provides a kind of storage medium for being stored with computer-readable program, Wherein the computer-readable program makes computer execute the transmission of uplink detection reference signal as described above in a base station Poewr control method.
The beneficial effect of the embodiment of the present invention is：An independence is introduced by the SRS power control to downlink sending point The opposite downlink sending point of the dedicated close-loop power control initial value of close-loop power control, i.e. user sends the closed power of SRS Controlling value is adjusted, and the power that uplink SRS is sent to the downlink sending point is determined according to the closed-loop power control value of adjustment Controlling value, to solve the problems, such as the currently SRS power control present in heterogeneous network.
Referring to following description and accompanying drawings, only certain exemplary embodiments of this invention is disclosed in detail, specifies original of the invention Reason can be in a manner of adopted.It should be understood that embodiments of the present invention are not so limited in range.In appended power In the range of the spirit and terms that benefit requires, embodiments of the present invention include many changes, modifications and are equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more It uses in a other embodiment, is combined with the feature in other embodiment, or the feature in substitution other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
From the detailed description below in conjunction with attached drawing, above-mentioned and other purposes, the feature and advantage of the embodiment of the present invention It will become apparent, in the accompanying drawings：
Fig. 1 is the schematic diagram of CoMP scene 3/4；
Fig. 2 is the transmitted power control method flow chart of the uplink detection reference signal of the embodiment of the present invention 1；
Fig. 3 is the transmitted power control method flow chart of the uplink detection reference signal of the embodiment of the present invention 3；
Fig. 4 is the transmitted power control method flow chart of the uplink detection reference signal of the embodiment of the present invention 4；
Fig. 5 is the composition schematic diagram of the user equipment of the embodiment of the present invention 5；
Fig. 6 is the composition schematic diagram of the user equipment of the embodiment of the present invention 6；
Fig. 7 is the composition schematic diagram of the base station of the embodiment of the present invention 7；
Fig. 8 is the composition schematic diagram of the base station of the embodiment of the present invention 8.
Specific embodiment
Various embodiments of the invention are illustrated with reference to the accompanying drawing.These embodiments are only exemplary, It is not limitation of the present invention.In order to enable those skilled in the art to will be readily understood that the principle of the present invention and embodiment party Formula, embodiments of the present invention are illustrated by taking the CoMP scene 3 of heterogeneous network scene and CoMP scene 4 as an example, it is to be understood that, The present invention is not limited to above systems, are applicable in for being related to the other systems of transmission power control of SRS.
The SRS power control in current Rel-10 is illustrated first.
In Rel-10, the covering of only one base station of cell locating for UE, uplink receiving point and downlink sending point are all The base station.Wherein, the power for sending SRS is determined according to formula (1).
PSRS, c(i)=min { PCMAX, c(i), PSRS_OFFSET, c(m)+10log10(MSRS, c)+PO_PUSCH, c(j)+αc(j)·PLc +fc(i)}(1)
As shown in formula (1), PSRS, c(i) the transmission function of uplink SRS is sent to serving cell c on subframe i for user equipment Rate, value are：PCMAX, c(i) and the minimum value of power control value.Wherein, which is：
PSRS_OFFSET, c(m)+10log10(MSRS, c)+PO_PUSCH, c(j)+αc(j)·PLc+fc(i)。
In formula (1), PCMAX, cIt (i) is the maximum hair for being allocated to user equipment and being sent to serving cell c on subframe i Send power；
In power control value, PSRS_OFFSET, c(m) it is high-rise 4 bit parameters being semi-statically configured, indicates to send out compared to UE The transmission power of PUSCH is sent, UE sends the power offset values of the transmission power of SRS.The SRS that m=0 indicates that triggering type is 0 is sent out It send, i.e., the SRS (Periodic SRS, P-SRS) in period is sent, and the SRS that m=1 indicates that triggering type is 1 is sent, i.e., aperiodic SRS (Aperiodic SRS, A-SRS) send.KSIt is the dedicated wireless heterogeneous networks (Radio of UE sent by high level Resource Control, RRC) signaling (UplinkPowerControlDedicated：DeltaMCS-Enabled), indicate Whether power adjustment based on MCS, K are opened in the power controlSWhen=1.25, PSRS_OFFSET, c(m) numberical range be [- 3, 12] dB, step-length 1dB；KSWhen=0, PSRS_OFFSET, c(m) numberical range is [- 10.5,12] dB, step-length 1.5dB；
MSRS, cIndicate that SRS is sent to the bandwidth of serving cell c on subframe i, with resource block (Resource Block, RB) Quantity indicate；
fc(i) power control adjusted value is indicated；
The nominal power P used when sending PUSCH, in power controlO_PUSCHInclude two parts：A part is that high level mentions The cell-specific parameters P of confessionO_NOMINAL_PUSCH, another part is user's special parameters PO_UE_PUSCH, that is to say, that PO_PUSCH= PO_NOMINAL_PUSCH+PO_UE_PUSCH。PO_NOMINAL_PUSCHIt is the nominal power that eNB is all semi-static settings of UE in the cell, i.e., The nominal power of cell-specific, there are also the dedicated nominal power offset, that is, P of UE by each UEO_UE_PUSCH, the used mark of final UE Claiming power is the sum of two parts i.e. PO_PUSCH.Its nominal power can be used identical with PUSCH power control in SRS power control Value.
αc(j) be 3bit path loss compensation factor, UE is informed by high level, the path loss is mended in SRS power control Repaying the factor can be used and value identical in PUSCH power control.
PLcUE is indicated based on path loss values estimated by downlink reference signal, using current in SRS power control Value used in PUSCH power control.
In the SRS power control value of above-mentioned Rel-10, SRS can share identical ring opening moiety in PUSCH power control And closed loop portion, i.e., using the parameter P in PUSCH power controlO_PUSCH, c, αc(j), PLcAnd fcIt (i), can from formula (1) Know, relative to PUSCH power control, SRS power control increases a deviant PSRS_OFFSET, c(m)。
Secondly, citing under heterogeneous network scene the problem of SRS power control to being illustrated.
Under the CoMP scene 3 and scene 4 of Rel-11 heterogeneous network scene, because far pico eNB (is similar to RRH, i.e., Hold without the end of a thread) and macro eNB transmission power difference can have the sending point its downlink CoMP for some CoMP UE The situation different with uplink CoMP receiving point.
Fig. 1 is the schematic diagram of CoMP scene 3/4.As shown in Figure 1, the downlink of CoMP UE is by macro base station (macro eNB) Signal is sent, and since CoMP UE distance RRH1 is closer, uplink is to receive signal by RRH1.In the case, DL The sending point of CoMP is different with the receiving point of UL CoMP.In this way, if DL CoMP sending point and UL CoMP receiving point all Need to obtain the SRS of UE transmission, then the SRS power control process mechanism of above-mentioned Rel-10 is no longer applicable in.
For example, utilizing the mutual of uplink and downlink channel for time division duplex (Time Division Duplexing, TDD) system Hui Xing, SRS are applied not only to estimation UL channel state information (Channel State Information, CSI), are also used in and estimate Count DL channel state information.I.e. not only the receiving point of UL CoMP needs to receive the SRS that the CoMP UE is sent, but also the DL The sending point of CoMP is also required to receive the SRS of CoMP UE transmission, so that the sending point of the DL CoMP can estimate the DL The sending point of CoMP is to the CSI between CoMP UE.However the SRS power control in the case of CoMP UE shown in Fig. 1, in Rel-10 Process mechanism is no longer applicable in.Reason is：
In the SRS power control process of Rel-10, open loop power control (Open Loop Power Control, OLPC) partially with It is tied up with PUSCH power control (power control, PC) closed-loop power control (Closed Loop Power Control, CLPC) part It is fixed, that is, reuse the open loop of PUSCH and the parameter of closed loop.And under CoMP scene shown in Fig. 1, due to the sending point of DL CoMP Different from the receiving point of UL CoMP, the path loss of the link between the link between DL CoMP to UE and UL CoMP to UE becomes Change independently of each other, and there are the path loss differences of DL link and UL link.According to the process of Rel-10 SRS power control, uplink path loss is moved State variation is compensated by PUSCH closed-loop power control, that is, passes through the close-loop power control adjusted value f in formula (1)c(i) come Compensation.Network-side cannot individually adjust SRS power control to adapt to the variation of its dynamics of channels, especially SRS and be sent to the DL CoMP Sending point when, existing SRS power control can not achieve dynamic adjustment SRS transmission power to adapt to the CoMP UE to the DL CoMP Channel variation of the link of sending point independently of the link to UL CoMP.
In addition, the power for being sent to Macro eNB is higher than the transmission function for being sent to RRH1 under heterogeneous network scene Rate the transmission power of SRS or can be properly received if keeping mono- SRS power control mechanism process of Rel-10 with Nacro eNB Power based on or the power that can be properly received with RRH1 based on, both of which can be led to the problem of, such as background technique It is described.Therefore, under the CoMP scene of Rel-11, need to solve the problems, such as SRS power control, to both estimate convenient for the CSI of UL CoMP Meter is also convenient for the CSI estimation of DL CoMP.
The solution discussed in current 3GPP RAN1 standard mainly has the following two kinds：
The first：
Multiple power offset values P are introduced in SRS power control formulaSRS_OFFSET, c(m), m=0,1,2 ..., N-1, and it is counted It is worth range to expand.
In the SRS power control of former Rel-10, there are two power offset values PSRS_OFFSET, c(m).It is corresponding when m=0 and m=1 Power offset values PSRS_OFFSET, c(m)。
In this approach, relative to Rel-10SRS power control, the SRS power offset values of N >=2 are introduced, so as to reality Using different SRS power offset values when existing A-SRS is sent to DL CoMP and is sent to UL CoMP.Wherein, it is sent to DL The sending point CoMP and the SRS for being sent to UL CoMP receiving point are different types of SRS, for example, being sent to the sending point DL CoMP Be A-SRS, and that be sent to UL CoMP receiving point is P-SRS, then two values.For example, being sent to the SRS of DL CoMP It is A-SRS, is sent to the SRS of UL CoMP either A-SRS is also possible to P-SRS.3 power excursions are so needed at this time Value.
However it is desirable to is expanded to how many by the range needs of this power offset values of simulating, verifying and needs several SRS power offset values, that is, N numerical values recited.And this method can not distinguish DL CoMP, UL CoMP to the user link Between dynamic, independent channel variation.
Second：A power control procedures are introduced separately into be sent to the SRS of DL CoMP.But currently without specific Implementation.
The embodiment of the present invention is mainly for introducing additional closed-loop power control in SRS power control to solve the above problems.Below Illustrate the transmitted power control method and its device of uplink SRS under the CoMP scene of the embodiment of the present invention by embodiment.
Fig. 2 is the transmitted power control method flow chart of the uplink detection reference signal of the embodiment of the present invention 1.This method is used In multipoint cooperative (CoMP) system, when the downlink sending point of CoMP user equipment is with uplink receiving point difference, as shown in Fig. 2, In user equipment side, this method includes：
Step 201, using the opposite downlink sending point of the close-loop power control initial value of user dedicated (UE-Specific) The closed-loop power control value of the detection reference signal (SRS) of transmission is adjusted；Wherein, the dedicated close-loop power control of the user Initial value is determined according to the difference of the path loss of the downlink sending point of acquisition and uplink receiving point to the CoMP user equipment；
Step 202, using the closed-loop power control value, power bias value and open-loop power control value determine current subframe to The power control value of downlink sending point transmission detection reference signal.
In the present embodiment, downlink sending point be the sending point DL CoMP, can be macro base station be also possible to micro-base station or RRH；Uplink receiving point is UL CoMP receiving point, can be macro base station and is also possible to micro-base station or RRH.
When the sending point DL CoMP is different with the UL CoMP receiving point, the sending point DL CoMP to the CoMP UE it Between link and the UL CoMP receiving point it is mutually indepedent to the path loss variation between the link between the CoMP UE, and there are roads Damage difference.If PUSCH power control mechanism operational excellence, the SRS power control for being sent to the UL CoMP receiving point can be good at compensating Path loss PL of the UL CoMP receiving point to the link between the CoMP UE.It is sent to the sending point DL CoMP at this time In SRS power control, the PL of the sending point DL CoMP to the CoMP UE and the UL CoMP receiving point are between the PL of the CoMP UE The difference of path loss realized dependent on the dedicated closed-loop power control of the user.Wherein, the sending point DL CoMP and UL CoMP connect The path loss difference of sink to the CoMP UE are compensated by the initial value of closed-loop power control.
Therefore, in step 201, the path loss difference of the sending point DL CoMP and UL CoMP receiving point to the CoMP UE is utilized To determine close-loop power control initial value.
In the present embodiment, close-loop power control initial value hc(0) it indicates, the close-loop power control initial value is public Formula (2) is expressed as：hc(0)=fc(0)+ΔPL (2)
In formula (2), fc(0) closed loop in the power control value for the uplink SRS for being sent to ULCoMP receiving point is indicated Value identical with PUSCH close-loop power control can be used in power control initial value.Therefore, different from the closed loop of PUSCH power control Power control initial value fc(0), UE-Specific closed loop introduced in the power control for being sent to the SRS of the sending point DL CoMP Power control, initial value hc(0) relative to fc(0) there are an offset value delta PL.
In addition, in step 201, cumulative power control mode and absolute value power control mode can be used to closed power Controlling value is adjusted.Such as the closed-loop power control value h of current subframe ic(i) it indicates.
When using cumulative power control mode, which is expressed as with formula (3)：
hc(i)=hc(i-1)+δPUSCH, c(i-KPUSCH) (3)
When using absolute value power control mode, which is expressed as with formula (4)：
hc(i)=δPUSCH, c(i-KPUSCH) (4)
In above-mentioned formula (3) and (4), hc(i-1) closed-loop power control value when (i-1) subframe, δ are indicatedPUSCH, c (i-KPUSCH) indicate subframe (i-KPUSCH) when DCI signaling indicated by transmission power control instruction (TPC command) value.Its In, i-KPUSCHThat indicate is subframe label i-KPUSCH；KPUSCHIndicate sub-frame offset.Frequency Division Duplex FDD (Frequency Division Duplexing) K in systemPUSCH=4；In time division duplex (TDD) system, it can be configured according to different UL/DL, KPUSCHTake different values.
In the present embodiment, in step 202, closed-loop power control value h is being utilizedc(i), power bias value and open loop Power control value determines that current subframe i sends the power control value of SRS to the sending point DL CoMP.Wherein, the power control value Use PC(i) it indicates, is expressed as with formula (5)：
PC(i)=PSRS_OFFSET, c(m)+10log10(MSRS, c)+PO_PUSCH, c(j)+αc(j)·PLc+hc(i) (5)
The meaning of each amount in formula (5) is similar with formula (1), and details are not described herein again.
Wherein, the parameter of the part open loop power control (OLPC), PO_PUSCH, c(j)+αc(j)·PLcIt can be connect with UL CoMP is sent to The parameter of the part OLPC in the SRS power control value of sink is identical, such as may be based on the parameter of the part OLPC of PUSCH.Separately Outside, PSRS_OFFSET, c(m) it can also be used and be sent to the power offset values in the SRS power control value of UL CoMP receiving point.
In this way, obtaining power control value PC(i) after, this method may also include：
Step 203, according to determining power control value PC(i) and it is allocated to CoMP user equipment subframe in this prior The transmission power P of serving cell c is sent on iCMAX, c(i) it is visited to determine that the CoMP user equipment is sent to the downlink sending point Survey the power P of reference signalSRS, c(i)；
It wherein, can be from the PC(i) and it is pre-configured with the transmission power for being sent to serving cell c on subframe i to the UE PCMAX, c(i) select the smallest value as the transmission power P for sending uplink SRS to the sending point DL CoMP inSRS, c(i).That is PSRS, c (i)=min { PCMAX, c(i), PC(i)} (6)
In the present embodiment, step 203 is optional step.
As can be seen from the above embodiments, an independent closed loop function is introduced to be sent to the SRS power control of downlink sending point Rate controlling value specifically determines closed power control to the path loss difference of the CoMP UE using downlink sending point and uplink receiving point Initial value processed, to be adjusted to current subframe to the closed-loop power control value that the downlink sending point sends SRS, and according to tune Whole closed-loop power control value determines the power control value that uplink SRS is sent to the downlink sending point, currently exists to solve SRS power control problem present in heterogeneous network.
In the present embodiment, this method may also include：The instruction that the affiliated serving cell of the CoMP user equipment is sent is received, The instruction is used to indicate the CoMP user equipment using the opposite downlink sending point of the dedicated closed-loop power control value of the user The closed-loop power control value for sending detection reference signal is adjusted.Wherein, the letter of 1bit can be used in the base station of the serving cell It enables to notify the CoMP UE.Make power control of the CoMP UE according to the instruction received to the transmission SRS of the UE in this way It is adjusted.
In the present embodiment, if the user equipment does not receive the instruction of base station side transmission or receives base station side instruction When based on closed-loop power control value identical with PUSCH, then the CoMP user equipment is based on closed power control identical with PUSCH Value processed sends SRS power to determine, similarly to the prior art, this is repeated no more.
In the present embodiment, this method may also include：The downlink sending point and uplink receiving point are obtained to the CoMP user The difference of the path loss of equipment.Wherein, the following two kinds mode can be used：
The downlink sending point for receiving the affiliated serving cell notice of the CoMP user equipment and the uplink receiving point are described in The difference of the path loss of CoMP user equipment；
In this fashion, the difference of the path loss is determined by network-side and notifies the UE, high-rise semi-static RRC can be used It signals.Or in the following way：
The relevant information of the difference of the determination path loss for receiving that the affiliated serving cell of the CoMP user equipment sends；The phase Closing information includes：The transmission power value of the downlink sending point and uplink receiving point pilot signal transmitted or the downlink sending point with The difference of the transmission power value of uplink receiving point pilot signal transmitted and the downlink sending point are led with what uplink receiving point was sent Frequency signal reaches the difference of the reception power of the CoMP user equipment；The difference of the path loss is determined using the relevant information.
In the present embodiment, after the difference for obtaining the path loss through the above way, for example, for receiving random access After response, which issues the SRS of the sending point downlink CoMP, and above-mentioned formula can be used in dedicated close-loop power control initial value (2) it calculates and obtains, wherein hc(0)=fc(0)+Δ PL=Δ Prampup+δmsg2+ΔPL；Wherein δmsg2It is random access response letter The TPC command value indicated in number, Δ PrampupIt is the value of high-level signaling instruction, indicates that UE sends the function of accidental access signal Rate accumulates adjusted value.For example, the UE issues the SRS of the sending point downlink CoMP for other situations, power control initial value is The difference of path loss network side notice or that user side calculating obtains.
In the present embodiment, this method further includes：It is dedicated in the user of the affiliated serving cell notice of the CoMP user equipment Nominal power offset PO_UE_PUSCH, cIt changes or when the CoMP user equipment receives random access response signal, Reset the close-loop power control initial value.It obtains the difference of path loss from network side again or obtains and determine that the path is damaged The relevant information for the difference lost, and close-loop power control initial value is obtained according to the above- mentioned information of reacquisition.
As can be seen from the above embodiments, user equipment can use the dedicated closed power control of user according to the instruction received System, solves the problems, such as the currently SRS power control present in heterogeneous network；In addition, can also be closed according to the information that network side is sent to this Ring power control initial value is reset.
The embodiment of the present invention 2 also provides a kind of transmitted power control method of uplink detection reference signal.This method is used for Multipoint cooperative (CoMP) system, when the downlink sending point of CoMP user equipment is with uplink receiving point difference, in network-side, the party Method includes：
Serving cell belonging to the CoMP user equipment sends the downlink sending point and the uplink to the CoMP user equipment Receiving point to the CoMP user equipment path loss difference, the difference of the path loss determines that user is dedicated for the user equipment Close-loop power control initial value；Alternatively,
Serving cell belonging to the CoMP user equipment sends the difference for determining the path loss to the CoMP user equipment Relevant information, which determines the difference of the path loss for the user equipment, and is determined according to the difference of the path loss The dedicated close-loop power control initial value of user, the relevant information include：The downlink sending point and uplink receiving point send pilot tone The difference of the transmission power value of the transmission power value of signal or the downlink sending point and uplink receiving point pilot signal transmitted, with And the pilot signal that sends of the downlink sending point and uplink receiving point reaches the difference of the reception power of the CoMP user equipment.
As can be seen from the above embodiments, the base station of the affiliated serving cell of CoMP user equipment can send downlink transmission to the UE Point with the uplink receiving point to the CoMP user equipment path loss difference or transmission determination the path loss difference phase Information is closed, so that the CoMP UE determines the dedicated close-loop power control initial value of user according to the information received, thus according to The close-loop power control initial value is adjusted its closed-loop power control value, solves the currently SRS present in heterogeneous network Power control problem.
In the present embodiment, the serving cell can by high-rise wireless heterogeneous networks (RRC) signaling to schedule between Every the relevant information of the difference for the difference or the determination path loss for updating the path loss；Alternatively, the serving cell can be according to connecing The signal quality of the uplink SRS received determines whether to update the difference of the path loss or determination and the difference of the path loss is related The relevant information, to be semi-statically configured the relevant information of the difference of the path loss or the difference of the determination path loss.
In the present embodiment, this method may also include：Serving cell belonging to the CoMP user equipment is to the CoMP user Equipment sends instruction, and it is opposite using the dedicated close-loop power control initial value of user which is used to indicate the CoMP user equipment The closed-loop power control value that the downlink sending point sends detection reference signal is adjusted；Alternatively, the instruction is used to indicate this CoMP user equipment still uses closed loop identical with uplink data channels using the dedicated close-loop power control initial value of user The closed-loop power control value that the opposite downlink sending point of power control initial value sends detection reference signal is adjusted.
Wherein, for not indicating using the opposite downlink hair of close-loop power control initial value identical with uplink data channels The case where sending the closed-loop power control value for sending detection reference signal to be adjusted, can default in base station side and the side UE and not receive It is modulated in the case where instruction using close-loop power control initial value identical with uplink data channels.
By in the present embodiment, which can be somebody's turn to do by the base station of the serving cell by the 1bit signaling in DCI signaling CoMP UE。
As can be seen from the above embodiments, the base station of the affiliated serving cell of user equipment can send to the UE and indicate that it uses user The instruction of dedicated close-loop power control, so that the power control for the SRS that UE is sent according to the instruction opposite direction sending point DL CoMP It is adjusted, solves the problems, such as the currently SRS power control present in heterogeneous network.
In the present embodiment, this method further includes：The serving cell determine the downlink sending point and uplink receiving point to this The difference of the path loss of CoMP user equipment.In this case, the difference of the path loss is determined by network-side and notifies to be somebody's turn to do CoMP user equipment.
In another embodiment, the CoMP user equipment is notified to determine that the related of the difference of the path loss is believed by network side Breath, so that the CoMP user equipment determines the difference of the path loss according to the relevant information.In this case, this method is also wrapped It includes：Obtain the relevant information for determining the difference of the path loss；The relevant information includes：The downlink sending point and uplink receiving point are sent out Send the difference of the transmission power value for sending power or the downlink sending point and uplink receiving point pilot signal transmitted of pilot signal The pilot signal that value and the downlink sending point and uplink receiving point are sent reaches the difference of the reception power of the CoMP user equipment Value；The relevant information of acquisition is notified into the CoMP user equipment.
In the present embodiment, which can reset the dedicated close-loop power control initial value of the user.In this way, This method further includes：The serving cell notifies the dedicated nominal power offset P of CoMP user equipment userO_UE_PUSCH, cOccur Variation；
Alternatively, the random access preamble that is sent according to the CoMP user equipment that receives of the base station of the serving cell to this CoMP user equipment sends random access response signal.
In above-mentioned two situations, which can reset its close-loop power control initial value, i.e., heavy The difference of the path loss newly is obtained from network side or determines the relevant information of the difference of the path loss.
Transmission power control of the scene shown in 1 to the uplink detection reference signal of the embodiment of the present invention with reference to the accompanying drawing Method is described in detail.This method is used for multipoint cooperative (CoMP) system, in the downlink sending point of CoMP user equipment and upper When row receiving point difference.Wherein, for CoMP UE, which is macro base station, which is RRH1。
Fig. 3 is the transmitted power control method flow chart of the uplink detection reference signal of the embodiment of the present invention 3.In this implementation In example, the difference Δ PL of simultaneously notification path loss is determined by network-side.
In network-side, as shown in figure 3, this method includes：
Step 301, serving cell belonging to the CoMP user equipment sends to the CoMP user equipment and instructs, which uses It is detected in indicating that the CoMP user equipment is sent using the opposite downlink sending point of the dedicated close-loop power control initial value of user The closed-loop power control value of reference signal is adjusted；
Wherein, the dedicated close-loop power control initial value of the user is that the CoMP user equipment is sent out according to the downlink of acquisition Send a little and uplink receiving point to the CoMP user equipment path loss difference Δ PL determine, be specifically shown in formula (2).
In the present embodiment, the affiliated serving cell c of the CoMP user equipment can be macrocell, can also be Microcell；In Fig. 1 Shown under scene, which is macrocell, then sends the instruction from the base station of serving cell c to the CoMP UE；
In the present embodiment, which can be placed in Downlink Control Information DCI and notifies the CoMP UE, 1 ratio can be used Spy notifies the UE, when such as 1 bit being " 1 ", can indicate using the opposite downlink of the dedicated closed-loop power control value of user The closed-loop power control value that sending point sends SRS is adjusted；When such as 1 bit is " 0 ", it can indicate dedicated without using user The opposite downlink sending point of closed-loop power control value send the closed-loop power control value of SRS and be adjusted, be based on as used The closed-loop power control value of PUSCH, vice versa.
Step 302, which determines the downlink sending point and uplink receiving point to the path of the CoMP user equipment The difference of loss, and the difference of the path loss is notified into the CoMP user equipment；
In the present embodiment, the difference Δ PL of the path loss can be expressed as with formula (7)：
In formula (7), Tmacro, TpicoIt respectively indicates macro eNB and pico eNB (or being RRH) and sends pilot tone letter Number transmission power value, RSRPmacroAnd RSRPpicoIt respectively indicates UE and receives the pilot tone letter from macro eNB and pico eNB Number received power value.The transmission power of macro eNB and pico eNB pilot signal transmitted known to network-side, thus known Δ T value, the pilot signal that furthermore network-side can be sent with rough estimate uplink and downlink CoMP reach the reception power difference Δ of UE RSRP, such as using the RSRP threshold value of CoMP as Δ RSRP, so as to obtain Δ PL using formula (7), but not limited to this, Δ RSRP can be also obtained by other means.
In the above-described embodiments, step 301 and 302 execution sequence can mutually set or execute side by side.In user equipment side：
Step 303, which receives the sending point DL CoMP and UL CoMP uplink receiving point to the CoMP UE's The difference Δ PL of path loss.
Step 304, the instruction that the affiliated serving cell c of the CoMP user equipment is sent is received；
The sequence of the step 303 and step 304 can arranged side by side or displacement.
Step 305~step 307 implementation procedure is similar with step 201~step 203 shown in Fig. 2, no longer superfluous herein It states.
In the present embodiment, this method further includes：
Step 308, in the dedicated nominal power offset P of user of the affiliated serving cell c notice of the CoMP UEO_UE_PUSCH, c It changes or receives the random access preamble that the serving cell is sent according to the CoMP UE in the CoMP user equipment When the random access response signal of return, close-loop power control initial value h is resetc(0)；
In the present embodiment, formula (2) can be used and reset the hc(0)；
Wherein, signaling the CoMP UE by high-rise wireless heterogeneous networks (RRC) in serving cell c should PO_UE_PUSCH, cIt changes, fc(0)=0, in this case, difference of the UE in the path loss for receiving network side transmission After Δ PL, it may be determined that the difference Δ PL of the path loss is the dedicated close-loop power control initial value h of the userc(0), that is, Directly the dedicated close-loop power control initial value h of user is received from network sidec(0)；
When the UE CoMP receives random access response signal, fc(0)=Δrampup+δmsg2, wherein δmsg2It is random The TPC command value indicated in access response signal, Δ PrampupIt is the value of high-level signaling instruction, indicates that UE transmission connects at random Enter the power accumulation adjusted value of signal.In this case, which needs difference the Δ PL and f according to the path lossc(0)= Δrampup+δmsg2It calculates and obtains the dedicated close-loop power control initial value h of the userc(0)。
As can be seen from the above embodiments, the difference of path loss is determined by network side and sends closed-loop power control instruction, user equipment The dedicated close-loop power control of user can be used according to the instruction received, wherein arriving using downlink sending point and uplink receiving point The path loss difference of the CoMP UE determines close-loop power control initial value, to send SRS to the downlink sending point to current subframe Closed-loop power control value be adjusted, and according to the closed-loop power control value of adjustment determine to the downlink sending point send uplink The power control value of SRS, to solve the problems, such as the currently SRS power control present in heterogeneous network；In addition, can also be to the closed loop function Rate control initial value is reset.
Fig. 4 is the transmitted power control method flow chart of the uplink detection reference signal of the embodiment of the present invention 4.In this implementation In example, the relevant information of the difference Δ PL of path loss is determined by network-side notice UE, which is determined by user side oneself Difference Δ PL.
In network-side, as shown in figure 4, this method includes：
Step 401, serving cell belonging to the CoMP user equipment sends to the CoMP user equipment and instructs, which uses It is detected in indicating that the CoMP user equipment is sent using the opposite downlink sending point of the dedicated close-loop power control initial value of user The closed-loop power control value of reference signal is adjusted；
Wherein, the dedicated close-loop power control initial value of the user is that the CoMP user equipment is sent out according to the downlink of acquisition Send a little and uplink receiving point to the CoMP user equipment path loss difference Δ PL determine, be specifically shown in formula (2).
Step 401 is similar with step 301, and details are not described herein again.
Step 402, which sends the difference Δ for determining the path loss to the CoMP UE The relevant information of PL；
The relevant information includes：The transmission power value T of the downlink sending point and uplink receiving point pilot signal transmitted or The difference DELTA T of the transmission power value of the downlink sending point and uplink receiving point pilot signal transmitted and the downlink sending point with The pilot signal that uplink receiving point is sent reaches the difference DELTA RSRP of the reception power of the CoMP user equipment；Believed using the correlation Cease the difference Δ RSRP for determining the path loss.
In user equipment side：
Step 403, which receives the determination sending point DL CoMP and the UL CoMP uplink of serving cell transmission Receiving point to the CoMP UE path loss difference Δ PL relevant information, and determine the path loss using the relevant information Difference Δ PL；
In the present embodiment, the difference Δ PL that formula (7) determines the path loss can be used, details are not described herein again.
Step 404, the instruction that the affiliated serving cell c of the CoMP user equipment is sent is received；
The sequence of the step 403 and step 404 can arranged side by side or displacement.
Step 405~step 407 implementation procedure is similar with step 201~step 204 shown in Fig. 2, step 408 and step Rapid 308 is similar, and details are not described herein again.
As can be seen from the above embodiments, the relevant information for the difference for determining path loss is notified by network side and sends closed-loop power control Instruction, user equipment can determine the difference of the path loss according to the relevant information received, and be used according to the instruction received The dedicated close-loop power control of user, to solve the problems, such as the currently SRS power control present in heterogeneous network；In addition, can also be right The close-loop power control initial value is reset.
Those of ordinary skill in the art will appreciate that implement the method for the above embodiments be can be with Relevant hardware is instructed to complete by program, the program can be stored in a computer readable storage medium, should Program may include all or part of the steps in above-described embodiment method when being executed, and the storage medium may include： ROM, RAM, disk, CD etc..
The embodiment of the invention also provides a kind of base station and user equipmenies, as described in the following examples.Due to the base station The transmission power of the principle and the above-mentioned uplink detection reference signal based on base station and user equipment that are solved the problems, such as with user equipment Control method is similar, therefore the implementation of the base station and user equipment may refer to the implementation of method, and overlaps will not be repeated.
Fig. 5 is the composition schematic diagram of the user equipment of the embodiment of the present invention 5.The user equipment 500 is CoMP UE.? Under CoMP system framework, the downlink sending point of the user equipment is different with uplink receiving point, as shown in figure 5, the user equipment 500 Including：Adjustment unit 501 and first processing units 502；Wherein,
Adjustment unit 501 is configured for sending using the opposite downlink of the dedicated close-loop power control initial value of user The closed-loop power control value for the detection reference signal that point is sent is adjusted；Wherein, at the beginning of the dedicated close-loop power control of the user Initial value is determined according to the difference of the path loss of the downlink sending point of acquisition and uplink receiving point to the CoMP user equipment；
First processing units 502 are configured for utilizing the closed-loop power control value, power bias value and open loop power control Value processed determines that current subframe sends the power control value of detection reference signal to the downlink sending point.
In the above-described embodiments, the working method of adjustment unit 501 and first processing units 502 and step 201 and step 202 is similar, and details are not described herein again.
Fig. 6 is the composition schematic diagram of the user equipment of the embodiment of the present invention 6.The user equipment 600 is CoMP UE.? Under CoMP system framework, the downlink sending point of the user equipment is different with uplink receiving point, as shown in fig. 6, the user equipment 600 Including：Adjustment unit 601 and first processing units 602, effect and the adjustment unit 501 and the first processing list in embodiment 5 The effect of member 502 is similar, and details are not described herein again.
As shown in fig. 6, the user equipment 600 may also include：First receiving unit 603, first receiving unit 603 are matched The instruction that the base station for receiving the affiliated serving cell of CoMP user equipment is sent is set, which is used to indicate the CoMP user Equipment sends the closed power of detection reference signal using the opposite downlink sending point of the dedicated closed-loop power control value of the user Controlling value is adjusted.In this way, the finger that the adjustment unit 601 of the user equipment 600 can be received according to the first receiving unit 603 Enable the closed power control that detection reference signal is sent using the opposite downlink sending point of the dedicated closed-loop power control value of the user Value processed is adjusted.
As shown in fig. 6, the user equipment 600 further includes the second processing unit 604, the second processing unit 604 is configured to use According to the determining power control value and being allocated to the CoMP user equipment 600 and be sent to serving cell in subframe in this prior Transmission power the power of detection reference signal is sent to determine the CoMP user equipment to the downlink sending point, it is specific to handle Process is similar with step 203, and details are not described herein again.
As shown in fig. 6, the user equipment 600 further includes first acquisition unit 605, first acquisition unit 605 is configured to use In obtain the downlink sending point and uplink receiving point to the CoMP user equipment path loss difference.It wherein, can be directly from this The base station of the affiliated serving cell of CoMP user equipment receives the difference of the path loss；Or it services belonging to the CoMP user equipment The base station of cell receives the relevant information for determining the difference of the path loss, and the difference of the path loss is determined using the information, as before Embodiment 2~4 is stated, details are not described herein again.
As shown in fig. 6, going back user equipment 600 further includes the second receiving unit 606 and the first reset cell 607；Wherein,
Second receiving unit 606, the user for being configured for receiving the affiliated serving cell notice of the CoMP user equipment are special Nominal power offset PO_UE_PUSCH；Or receive the random access that the serving cell is sent according to the CoMP user equipment The random access response signal of leading return；
First reset cell 607 is configured for dedicated in the user of the affiliated serving cell notice of the CoMP user equipment Nominal power offset PO_UE_PUSCHIt changes or when receiving random access response signal, resets the closed power Control initial value.
In the present embodiment, the reset mode of the first reset cell 607 is as described in embodiment 2-4, and details are not described herein again.
As can be seen from the above embodiments, user equipment can use the dedicated closed power control of user according to the instruction received System, to solve the problems, such as the currently SRS power control present in heterogeneous network；In addition, can also be to the close-loop power control initial value It is reset.
Fig. 7 is that the base station of the embodiment of the present invention 7 constitutes schematic diagram.The base station is the serving BS of the CoMP UE.
As shown in fig. 7, the base station 700 includes：First transmission unit 701, the first transmission unit 701 are configured for this CoMP user equipment send the downlink sending point and the uplink receiving point to the CoMP user equipment path loss difference, the road The difference of diameter loss determines the dedicated close-loop power control initial value of user for the user equipment.
There is above-described embodiment it is found that network side is by notifying the CoMP UE for the difference of the path loss, so that the CoMP UE can determine the initial value of the dedicated closed-loop power control of user according to the difference of the path loss, and carry out power tune based on the initial value It is whole, solve problems of the prior art.
In the present embodiment, the difference of the path loss is directly determined by network side, in this case, as shown in fig. 7, should Base station further includes third processing unit 702, and third processing unit 702 is configured for determining the downlink sending point and uplink receiving Point arrives the difference of the path loss of the CoMP user equipment.
As shown in fig. 7, base station 700 further includes third transmission unit 703, third transmission unit 703 is configured for this CoMP user equipment sends instruction, which is used to indicate the CoMP user equipment using at the beginning of the dedicated close-loop power control of user The closed-loop power control value that the initial value opposite direction downlink sending point sends detection reference signal is adjusted；Alternatively, the instruction is used for It is identical as uplink data channels to indicate that the CoMP user equipment is still used using the dedicated close-loop power control initial value of user The opposite downlink sending point of close-loop power control initial value closed-loop power control value for sending detection reference signal be adjusted.
In this way, user equipment does not receive instruction or is receiving using closed power identical with uplink data channels When the instruction that the closed-loop power control value that the opposite downlink sending point of control initial value sends detection reference signal is adjusted into Close-loop power control initial value of the row based on PUSCH carries out power adjustment；It is receiving using the dedicated closed power control of user When the instruction that the closed-loop power control value that the opposite downlink sending point of initial value processed sends detection reference signal is adjusted, it is based on The dedicated close-loop power control initial value of user carries out power adjustment.
In the present embodiment, network side can be semi-statically configured the difference of the path loss, and the UE is notified to reset The difference of the path loss.In this way, the base station further includes the second reset cell 704, it is quiet that the second reset cell 704 is configured for half The difference of the path loss is reset to state, wherein the difference for updating the path loss can be spaced to schedule, or according to reception To the signal quality of uplink SRS determine whether to update the difference of the path loss.
And network side also passes through information and the UE is notified to reset the difference of the path loss.In this case, the base station is also Including the 4th transmission unit 705, the 4th transmission unit is configured for notifying that CoMP user equipment user is dedicated nominal Power excursion PO_UE_PUSCH, c；Alternatively, being configured for the random access preamble sent according to the CoMP user equipment received Random access response signal is sent to the CoMP user equipment.In both cases, when the UE receives network side notice After above- mentioned information, the difference of path loss is reset.
As can be seen from the above embodiments, the lateral UE of network sends instruction, and network side determines the difference of path loss and notifies to be somebody's turn to do UE solves the problems, such as the power control of SRS in the prior art so that UE carries out close-loop power control according to instruction.
Fig. 8 is that the base station of the embodiment of the present invention 8 constitutes schematic diagram.The base station is the serving BS of the CoMP UE.
As shown in figure 8, base station 800 includes：
Second transmission unit 801, the second transmission unit 800, which is configured for sending to the CoMP user equipment, determines the road The relevant information of the difference of diameter loss, the relevant information determine the difference of the path loss for the user equipment, and according to the path The difference of loss determines the dedicated close-loop power control initial value of user；
Wherein, which includes：The transmission power value of the downlink sending point and uplink receiving point pilot signal transmitted Or the transmission power value of the downlink sending point and uplink receiving point pilot signal transmitted difference and the downlink sending point with The pilot signal that uplink receiving point is sent reaches the difference of the reception power of the CoMP user equipment.
As can be seen from the above embodiments, the lateral UE of network sends the relevant information for determining the difference of path loss so that UE according to The relevant information carries out close-loop power control, solves the problems, such as the power control of SRS in the prior art.
As shown in figure 8, the base station 800 further includes fourth processing unit 802, it is configured for obtaining the determining path loss Difference relevant information.
Similar to Example 7, which further includes：Third transmission unit 703 and the 4th transmission unit 704, herein no longer It repeats.
In addition, further including third reset cell 805, it is configured for semi-statically resetting the phase of the difference of determining path loss Close parameter.
As can be seen from the above embodiments, the lateral UE of network sends instruction, and network side notifies to determine the phase of the difference of path loss Information is closed, which determines the difference of the path loss according to the relevant information, and carries out close-loop power control according to instruction, solves In the prior art the problem of the power control of SRS.In addition, can also be semi-statically configured the relevant information.
In Fig. 7 and embodiment shown in Fig. 8, all parts can be freely combined according to the actual situation.For example, a base Station some or all of is provided simultaneously in Fig. 7 and Fig. 8 component, and details are not described herein again.
The embodiment of the present invention also provides a kind of computer-readable program, wherein when executing the program in CoMP user equipment When, which makes computer execute uplink detection reference signal described in embodiment 1,3,4 in the CoMP user equipment Transmitted power control method.
The embodiment of the present invention also provides a kind of storage medium for being stored with computer-readable program, and wherein this is computer-readable Program makes computer execute the transmission power of uplink detection reference signal described in embodiment 1,3,4 in CoMP user equipment Control method.
The embodiment of the present invention also provides a kind of computer-readable program, wherein when executing the program in a base station, the journey Sequence makes computer execute the transmission power control side of uplink detection reference signal described in embodiment 2,3,4 in the base station Method.
The embodiment of the present invention also provides a kind of storage medium for being stored with computer-readable program, and wherein this is computer-readable Program makes computer execute the transmission power control side of uplink detection reference signal described in embodiment 2,3,4 in a base station Method.
The device and method more than present invention can be by hardware realization, can also be by combination of hardware software realization.The present invention It is related to such computer-readable program, when the program is performed by logical block, the logical block can be made to realize above The device or component parts, or the logical block is made to realize various method or steps described above.The invention further relates to For storing the storage medium of procedure above, such as hard disk, disk, CD, DVD, flash memory.
Combining specific embodiment above, invention has been described, it will be appreciated by those skilled in the art that this A little descriptions are all exemplary, and are not limiting the scope of the invention.Those skilled in the art can be according to the present invention Spirit and principle various variants and modifications are made to the present invention, these variants and modifications are also within the scope of the invention.

Claims (27)

1. a kind of transmitted power control method of uplink detection reference signal is used for heterogeneous network, in heterogeneous network user equipment Downlink sending point with uplink receiving point difference when, the method includes：
The detection reference signal sent using the opposite downlink sending point of the dedicated close-loop power control initial value of user is closed Ring power control value is adjusted；Wherein, the dedicated close-loop power control initial value of the user is according to the downlink of acquisition The difference of path loss of sending point and uplink receiving point to the heterogeneous network user equipment determines；
Determine that current subframe is sent out to the downlink using the closed-loop power control value, power bias value and open-loop power control value Send the power control value for sending detection reference signal.
2. according to the method described in claim 1, wherein, the method also includes：
The instruction that the base station of the affiliated serving cell of heterogeneous network user equipment is sent is received, described instruction is used to indicate described Heterogeneous network user equipment is sent using the opposite downlink sending point of the dedicated close-loop power control initial value of the user and is visited The closed-loop power control value for surveying reference signal is adjusted.
3. according to the method described in claim 1, wherein, the method also includes：
According to the determining power control value and it is allocated to the heterogeneous network user equipment and is sent on the current subframe Determine that the heterogeneous network user equipment sends detection with reference to letter to the downlink sending point to the transmission power of serving cell Number power.
4. according to the method described in claim 1, wherein, the method also includes：The downlink sending point is obtained to connect with uplink Sink to the heterogeneous network user equipment path loss difference.
5. according to the method described in claim 4, wherein, the acquisition downlink sending point and uplink receiving point to the heterogeneous network The difference of the path loss of network user equipment, including：
Receive the downlink sending point and the uplink receiving point that the affiliated serving cell of the heterogeneous network user equipment notifies To the difference of the path loss of the heterogeneous network user equipment；Alternatively,
Receive the relevant information of the difference for the determination path loss that the affiliated serving cell of the heterogeneous network user equipment is sent； The relevant information includes：The transmission power value of the downlink sending point and uplink receiving point pilot signal transmitted or it is described under Row sending point connects with the difference of the transmission power value of uplink receiving point pilot signal transmitted and the downlink sending point with uplink The pilot signal that sink is sent reaches the difference of the reception power of the heterogeneous network user equipment；
The difference of the path loss is determined using the relevant information.
6. according to the method described in claim 1, wherein, the dedicated close-loop power control initial value of user is on described Row receiving point sends the difference of close-loop power control initial value and the path loss in the power control value of detection reference signal Sum；Alternatively,
The dedicated close-loop power control initial value of user is the difference of the path loss.
7. according to the method described in claim 1, wherein, the method also includes：
Change in the dedicated nominal power offset of user of the heterogeneous network user equipment affiliated serving cell notice or Person resets the close-loop power control initial value when the heterogeneous network user equipment receives random access response signal.
8. a kind of transmitted power control method of uplink detection reference signal is used for heterogeneous network, in heterogeneous network user equipment Downlink sending point with uplink receiving point difference when, the method includes：
Serving cell belonging to the heterogeneous network user equipment sends the downlink to the heterogeneous network user equipment and sends Point and uplink receiving point to the heterogeneous network user equipment path loss difference, so that the heterogeneous network user sets The closed loop of the standby detection reference signal sent using the opposite downlink sending point of the dedicated close-loop power control initial value of user Power control value is adjusted, and the difference of the path loss is used to determine the dedicated closed power control of user for the user equipment Initial value processed；Alternatively,
Serving cell belonging to the heterogeneous network user equipment sends to the heterogeneous network user equipment and determines the path The relevant information of the difference of loss, so that the heterogeneous network user equipment uses the dedicated close-loop power control initial value pair of user The closed-loop power control value of the detection reference signal sent to the downlink sending point is adjusted, and the relevant information is for supplying The user equipment determines the difference of the path loss, and determines the dedicated closed power of user according to the difference of the path loss Initial value is controlled, the relevant information includes：The transmission power of the downlink sending point and uplink receiving point pilot signal transmitted The difference and the downlink of the transmission power value of value or the downlink sending point and uplink receiving point pilot signal transmitted are sent out The difference for sending the pilot signal a little sent with uplink receiving point to reach the reception power of the heterogeneous network user equipment.
9. according to the method described in claim 8, wherein, the serving cell passes through high-rise semi-static radio resource control signaling Send the relevant information of the difference of the path loss or the difference of the determining path loss.
10. according to the method described in claim 8, wherein, serving cell belonging to the heterogeneous network user equipment is to described Heterogeneous network user equipment sends instruction, and described instruction is used to indicate the heterogeneous network user equipment and closes using user is dedicated The closed-loop power control value that the opposite downlink sending point of ring power control initial value sends detection reference signal is adjusted；Or Person,
Described instruction is used to indicate the heterogeneous network user equipment and uses the dedicated close-loop power control initial value of user still Detection reference signal is sent using the opposite downlink sending point of close-loop power control initial value identical with uplink data channels Closed-loop power control value be adjusted.
11. according to the method described in claim 8, wherein, sending the path loss to the heterogeneous network user equipment Difference before, the method also includes：
Determine the downlink sending point and uplink receiving point to the heterogeneous network user equipment path loss difference.
12. according to the method described in claim 8, wherein, determining the path sending to the heterogeneous network user equipment Before the relevant parameter of the difference of loss, the method also includes：
Obtain the relevant information for determining the difference of the path loss.
13. according to the method described in claim 8, wherein, the method also includes：
Notify the dedicated nominal power offset of heterogeneous network user equipment user；Alternatively,
The random access preamble sent according to the heterogeneous network user equipment that receives is to the heterogeneous network user equipment Send random access response signal.
14. according to the method described in claim 8, wherein, the method also includes：
The network side semi-statically resets the difference of the path loss or determines the relevant parameter of the difference of path loss.
15. a kind of heterogeneous network user equipment, the heterogeneous network user equipment include：
Adjustment unit, the adjustment unit are configured for opposite described different using the dedicated close-loop power control initial value of user The closed-loop power control value for the detection reference signal that the downlink sending point of structure network user device is sent is adjusted；Wherein, institute State the downlink sending point and the heterogeneous network user equipment of the dedicated close-loop power control initial value of user according to acquisition Uplink receiving point to the heterogeneous network user equipment path loss difference determine；
First processing units, the first processing units are configured for utilizing the closed-loop power control value, power bias value Power control value of the current subframe to downlink sending point transmission detection reference signal is determined with open-loop power control value.
16. user equipment according to claim 15, wherein the user equipment further includes：
First receiving unit, it is small that first receiving unit is configured for receiving service belonging to the heterogeneous network user equipment The instruction that the base station in area is sent, described instruction are used to indicate the heterogeneous network user equipment using the dedicated closed loop of the user The closed-loop power control value that the opposite downlink sending point of power control initial value sends detection reference signal is adjusted.
17. user equipment according to claim 15, wherein the user equipment further includes：
The second processing unit, described the second processing unit are configured for according to the determining power control value and are allocated to institute It states heterogeneous network user equipment and is sent to the transmission power of serving cell on the current subframe to determine the heterogeneous network User equipment sends the power of detection reference signal to the downlink sending point.
18. user equipment according to claim 15, wherein the user equipment further includes：
First acquisition unit, the first acquisition unit are configured for obtaining the downlink sending point and uplink receiving point to institute State the difference of the path loss of heterogeneous network user equipment.
19. user equipment according to claim 15, wherein the dedicated close-loop power control initial value of user be to The uplink receiving point sends close-loop power control initial value and path damage in the power control value of detection reference signal The sum for the difference lost；Alternatively, the dedicated close-loop power control initial value of user is the difference of the path loss.
20. user equipment according to claim 15, wherein the user equipment further includes：
Second receiving unit, the user for being configured for receiving the affiliated serving cell notice of the heterogeneous network user equipment are dedicated Nominal power offset；Or receive the random access preamble that the serving cell is sent according to the heterogeneous network user equipment The random access response signal of return；
First reset cell, first reset cell are configured in the affiliated serving cell of heterogeneous network user equipment The dedicated nominal power offset of the user of notice changes or receives random access in the heterogeneous network user equipment When response signal, the close-loop power control initial value is reset.
21. a kind of base station, the base station include：
First transmission unit, first transmission unit are configured for sending the heterogeneous network to heterogeneous network user equipment The uplink receiving point of the downlink sending point of user equipment and the heterogeneous network user equipment is to the heterogeneous network user equipment Path loss difference, so as to the heterogeneous network user equipment use the dedicated close-loop power control initial value opposite direction institute of user The closed-loop power control value for stating the detection reference signal of downlink sending point transmission is adjusted, and the difference of the path loss is for supplying The user equipment determines the dedicated close-loop power control initial value of user.
22. base station according to claim 21, wherein the base station further includes：
Third processing unit, the third processing unit are configured for determining the downlink sending point and uplink receiving point to institute State the difference of the path loss of heterogeneous network user equipment.
23. a kind of base station, the base station include：
Second transmission unit, second transmission unit, which is configured for sending to heterogeneous network user equipment, determines the isomery The uplink receiving point of the downlink sending point of network user device and the heterogeneous network user equipment is to the heterogeneous network user The relevant information of the difference of the path loss of equipment, so that the heterogeneous network user equipment uses the dedicated closed power control of user The closed-loop power control value for the detection reference signal that the opposite downlink sending point of initial value processed is sent is adjusted, the correlation Information is used to determine the difference of the path loss for the user equipment, and determines that user is dedicated according to the difference of the path loss Close-loop power control initial value；
Wherein, the relevant information includes：The transmission power value of the downlink sending point and uplink receiving point pilot signal transmitted Or the downlink sending point is sent with the difference of the transmission power value of uplink receiving point pilot signal transmitted and the downlink The pilot signal that point is sent with uplink receiving point reaches the difference of the reception power of the heterogeneous network user equipment.
24. base station according to claim 23, wherein the base station further includes：
Fourth processing unit obtains the relevant information for determining the difference of the path loss.
25. the base station according to claim 21 or 23, wherein the base station further includes：
Third transmission unit, the third transmission unit are configured for sending to the heterogeneous network user equipment and instruct, institute State instruction be used to indicate the heterogeneous network user equipment using the dedicated close-loop power control initial value of user it is opposite it is described under The closed-loop power control value that row sending point sends detection reference signal is adjusted；Alternatively,
Described instruction is used to indicate the heterogeneous network user equipment and uses the dedicated close-loop power control initial value of user still Detection reference signal is sent using the opposite downlink sending point of close-loop power control initial value identical with uplink data channels Closed-loop power control value be adjusted.
26. the base station according to claim 21 or 23, wherein the base station further includes：
4th transmission unit, the 4th transmission unit are configured for notifying the heterogeneous network user equipment user dedicated Nominal power offset；Alternatively, before being configured for the random access sent according to the heterogeneous network user equipment received It is oriented to the heterogeneous network user equipment and sends random access response signal.
27. the base station according to claim 21 or 23, wherein the base station further includes：
Second reset cell, second reset cell are configured for semi-statically resetting the difference or determination of the path loss The relevant parameter of the difference of path loss.
CN201280072704.9A 2012-05-11 2012-05-11 The transmitted power control method and its device of uplink detection reference signal Expired - Fee Related CN104255073B (en)

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