CN104255073A

CN104255073A - Method and device for controlling transmission power of uplink sounding reference signal

Info

Publication number: CN104255073A
Application number: CN201280072704.9A
Authority: CN
Inventors: 徐月巧; 王轶; 周华
Original assignee: Fujitsu Ltd
Current assignee: Fujitsu Ltd
Priority date: 2012-05-11
Filing date: 2012-05-11
Publication date: 2014-12-31
Anticipated expiration: 2032-05-11
Also published as: WO2013166695A1; CN104255073B

Abstract

A method for controlling transmission power of an uplink sounding reference signal, applied in a coordinated multi-point (CoMP) system. When a downlink transmitting point and an uplink receiving point of a CoMP user equipment are different, the method comprises: adjusting, by using a user-dedicated closed-loop power control initial value, a closed-loop power control value for transmitting a sounding reference signal to the downlink transmitting point, the user-dedicated closed-loop power control initial value being determined according to an obtained path loss difference between a path from the downlink transmitting point to the CoMP user equipment and a path from the uplink receiving point to the CoMP user equipment; and determining, by using the closed-loop power control value, a power offset value and an open-loop power control value, a power control value for a current subframe to transmit the sounding reference signal to the downlink transmitting point. The method can solve the problem of power control in a heterogeneous network scenario.

Description

Method and device for controlling transmission power of uplink sounding reference signal

The transmitted power control method and its engineering device technique field of uplink detection reference signal

The present invention relates to the communications field, more particularly to one kind uplink detection reference signal under CoMP scenes（Sounding Reference Signal, SRS) transmitted power control method and its device.Background technology

At present in Rel-10, a cell is in（Cell user equipment)（User Equipment, IE) descending sending point it is identical with uplink receiving point, be all same base station（Base Station, BS), therefore, the UE only need to send uplink SRS to the descending sending point.In Rel-10 SRS power control mechanisms, Physical Uplink Shared Channel can be shared by sending SRS power control value（Physical Uplink Share Channel, PUSCH) ring opening moiety and closed loop portion in power control value, relative to PUSCH, the power control value for sending the SRS adds a power offset values.

In LTE-Advanced (LTE-A) system, coordinate multipoint (Coordinated Multi-point, CoMP) transmission/reception is included into LTE-A frameworks as one of key technology.Cooperation transmission scene sends a signal to user using the adjacent transfer point cooperation in geographical position or multipoint cooperative receives the upward signal from user, for Cell Edge User, can especially improve signal quality, expand the coverage area.In 3GPP LTE-A standardisation process, following four scene is defined for uplink/downlink CoMP (UL/DL CoMP)：

CoMP scenes 1 (Scenario 1):CoMP (Homogenous Network with Intra-site CoMP) between the site of homogeneous network;

CoMP scenes 2 (Scenario 2)：With high transmit power wireless remote unit（Remote Radio Head, RRH) homogeneous network；

CoMP scenes 3 (Scenario 3)：The macrocell scope distribution low-power RRH heterogeneous network scene with different districts ID；

CoMP scenes 4 (Scenario 4)：The macrocell scope distribution low-power RRH heterogeneous network scene with same cells ID.

Wherein, CoMP scenes 3 and scene 4 belong to heterogeneous network scene, because of macro base station (macro eNB) and micro-base station in macrocell coverage area（Pico eNB) (or distal end without the end of a thread RRH) have under different transmit powers, such as system of 10MHz bandwidth, and macro eNB downlink transmission power is 46dBm, pico eNB transmit power For 30dBm.Therefore according to existing Reference Signal Received Power（Reference Signal Received Power, RSRP some UE descending sending point) is determined, and some UE uplink receiving point is determined according to UE to each service point distance, can there is a situation where that its descending sending point is macro eNB and uplink receiving point is pico eNB.So the up coverage that can have the asymmetric situation of up-downgoing coverage, i.e. pico eNB is more than its descending coverage.

For some CoMP UE, may there is a situation where that descending CoMP sending points are different with up CoMP receiving points.Under this heterogeneous network scene, if also using Rel-10 SRS power control mechanisms, or based on the power that SRS transmit power can be properly received with macro eNB, or based on the power that can be properly received with RRH1, so, uplink detection reference signal is being sent（Sounding Reference Signal, SRS) Power Control in terms of can have problem.I.e., if being properly received SRS target adjustment SRS transmit powers according to macro eNB, then the CoMP UE send SRS with higher transmit power all the time, can reduce the battery of user, and cause larger interference to the user serviced in RRH1;If sent according to the RRH1 target adjustment SRS for being properly received SRS, the CoMP UE send SRS with relatively low transmit power all the time, then macro eNB may be unable to properly receive SRS.There is presently no the scheme for the Power Control Problem for specifically effectively solving above-mentioned transmission SRS.

It should be noted that the introduction to technical background is intended merely to the convenient explanation clear, complete to technical scheme progress above, and facilitates the understanding of those skilled in the art and illustrate.Can not be merely because these schemes be set forth in the background section of the present invention and think that above-mentioned technical proposal is known to those skilled in the art.

The content of the invention

The purpose of the embodiment of the present invention is the transmitted power control method and its device for providing a kind of uplink detection reference signal, one closed loop Power Control is introduced by the SRS Power Controls to descending sending point, the closed-loop power control value for sending SRS to the descending sending point is adjusted, and determined to send the power control value of uplink SRS to the descending sending point according to the closed-loop power control value of adjustment, so as to solve the problems, such as the current SRS power controls present in heterogeneous network.

One side according to embodiments of the present invention provides a kind of transmitted power control method of uplink detection reference signal, for multipoint cooperative（CoMP) system, when the descending sending point of CoMP user equipment is different with uplink receiving point, this method includes：

The closed-loop power control value of detection reference signal using the special close-loop power control initial value of user to being sent to the descending sending point is adjusted；Wherein, the special close-loop power control initial value of the user according to acquisition this under The difference of row sending point and uplink receiving point to the path loss of the CoMP user equipment is determined；

Determine that present sub-frame sends the power control value of detection reference signal to the descending sending point using the closed-loop power control value, power bias value and open-loop power control value.

It is according to embodiments of the present invention another aspect provides a kind of transmitted power control method of uplink detection reference signal, for multipoint cooperative（CoMP) system, when the descending sending point of CoMP user equipment is different with uplink receiving point, this method includes：

Serving cell belonging to the CoMP user equipment sends the descending sending point and the uplink receiving point to the difference of the path loss of the CoMP user equipment to the CoMP user equipment, and the difference of the path loss determines the special close-loop power control initial value of user for the user equipment；Or,

Serving cell belonging to the CoMP user equipment sends the relevant information for the difference for determining the path loss to the CoMP user equipment, the relevant information is used for the difference that the user equipment determines the path loss, and the special close-loop power control initial value of user is determined according to the difference of the path loss, the relevant information includes：The pilot signal that the descending sending point is sent with the transmission power value of uplink receiving point pilot signal transmitted or the descending sending point with the difference of the transmission power value of uplink receiving point pilot signal transmitted and the descending sending point with uplink receiving point reaches the difference of the receiving power of the CoMP user equipment.

It is according to embodiments of the present invention another aspect provides a kind of user equipment, the user equipment includes：Adjustment unit, the closed-loop power control value that the adjustment unit is arranged to the detection reference signal to being sent to the descending sending point using the special close-loop power control initial value of user is adjusted；Wherein, the difference of path loss of the special close-loop power control initial value of the user according to descending sending point and uplink receiving point of acquisition to the CoMP user equipment is determined；

First processing units, the first processing units are arranged to determine that present sub-frame sends the power control value of detection reference signal to the descending sending point using the closed-loop power control value, power bias value and open-loop power control value.

It is according to embodiments of the present invention another aspect provides a kind of base station, the base station includes：

First transmitting element, first transmitting element is arranged to send the descending sending point and the uplink receiving point to the difference of the path loss of the CoMP user equipment to the CoMP user equipment, and the difference of the path loss determines the special close-loop power control initial value of user for the user equipment.

Second transmitting element, second transmitting element is arranged to send the relevant information for the difference for determining the path loss to the CoMP user equipment, and the relevant information is used for the difference that the user equipment determines the path loss, and according to the road The difference of footpath loss determines the special close-loop power control initial value of user；

Wherein, the relevant information includes：The pilot signal that the descending sending point is sent with the transmission power value of uplink receiving point pilot signal transmitted or the descending sending point with the difference of the transmission power value of uplink receiving point pilot signal transmitted and the descending sending point with uplink receiving point reaches the difference of the receiving power of the CoMP user equipment.

It is according to embodiments of the present invention that another aspect provides a kind of computer-readable program, wherein when performing the program in a user device, the program causes computer to perform the transmitted power control method of uplink detection reference signal as described above in the user equipment.

It is according to embodiments of the present invention another aspect provides a kind of storage medium for the computer-readable program that is stored with, wherein the computer-readable program causes computer to perform the transmitted power control method of uplink detection reference signal as described above in a user device.

It is according to embodiments of the present invention that another aspect provides a kind of computer-readable program, wherein when performing described program in a base station, described program causes computer to perform the transmitted power control method of uplink detection reference signal as described above in the base station.

It is according to embodiments of the present invention another aspect provides a kind of storage medium for the computer-readable program that is stored with, wherein the computer-readable program causes computer to perform the transmitted power control method of uplink detection reference signal as described above in a base station.

The beneficial effect of the embodiment of the present invention is：One closed loop Power Control is introduced by the SRS Power Controls to descending sending point, i.e. the special close-loop power control initial value of user is adjusted to the closed-loop power control value for sending SRS to the descending sending point, and determined to send the power control value of uplink SRS to the descending sending point according to the closed-loop power control value of adjustment, so as to solve the problems, such as the current SRS power controls present in heterogeneous network.

With reference to explanation hereinafter and accompanying drawing, only certain exemplary embodiments of this invention is disclose in detail, the principle for specifying the present invention can be in adopted mode.It should be understood that embodiments of the present invention are not so limited in scope.In the range of the spirit and terms of appended claims, embodiments of the present invention include many changes, modifications and equivalent.

Described for a kind of embodiment and/or the feature that shows can be used in same or similar mode in one or more other embodiments, it is combined with feature in other embodiment, or substitute the feature in other embodiment.

It should be emphasized that term " include/include " refers to the presence of feature, one integral piece, step or component when being used herein, but it is not precluded from the presence or additional of one or more further features, one integral piece, step or component. Brief description of the drawings

From the detailed description below in conjunction with accompanying drawing, above-mentioned and other purposes, the feature and advantage of the embodiment of the present invention will become apparent, in the accompanying drawings：

Fig. 1 is the schematic diagram of CoMP scenes 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.Embodiment

The various embodiments to the present invention are illustrated below in conjunction with the accompanying drawings.These embodiments are exemplary, are not limitations of the present invention.In order that those skilled in the art can easily understand that the principle and embodiment of the present invention, embodiments of the present invention are illustrated by taking the CoMP scenes 3 and CoMP scenes 4 of heterogeneous network scene as an example, it is to be understood that, the present invention is not limited to said system, and the other systems controlled for being related to SRS transmit power are applicable.

The SRS power controls in current Rel-10 are illustrated first.

In Rel-10, the cell only one of which base station covering residing for UE, its up receiving point and descending sending point are all the base stations.Wherein, according to formula（1) transmission SRS power is determined.

O, corpse (m)+101og₁₀( _SRSc) + _o (j) + a_c(j)-PL_{c +}f_c

(1) such as formula（1) shown in, ^ ^ are the transmit power that user equipment sends uplink SRS in subframe to serving cell c, and its value is：^peMAX,.^wWith the minimum value of power control value.Wherein, the power control value is：

(w) + 101og₁₀( _SRSc) + _JP_o (j) + a_c(j)-PL_c+f_cI) in formula a),^Pcmax,.(' ') it is to be allocated to the maximum that user equipment is sent to serving cell c in subframe Transmit power；

In power control value,^PsRS-^OTFSET,^{e (Wi}) it is high-rise 4 bit parameters being semi-statically configured, represent to send PUSCH transmit power compared to UE, UE sends the power offset values of SRS transmit power.^m = ⁰Represent that triggering type sends for 0 SRS, i.e., the SRS (Periodic SRS, P-SRS) in cycle is sent,^{w = 1}Represent that triggering type sends for 1 SRS, i.e., aperiodic SRS (Aperiodic SRS, A-SRS) sends.It is by the wireless heterogeneous networks special UE of high level transmission（Radio Resource Control, RRC) signaling (Upl inkPowerControlDedicated:DeltaMCS-Enabled), represent whether to open the power adjustment based on MCS ,=1 in the Power Control²⁵When,^Ps_RS,_e(number range for [_₃, i₂] _dB, step-length is i_{dB ;}When=0, (number range is [- 10. 5,12] dB to ^-^^^^, and step-length is L 5dB;

M^sRS,^cRepresent that SRS is sent to serving cell c bandwidth in subframe, with resource block（Resource Block,

RB quantity) is represented；

^{/c W}Represent Power Control adjusted value；

When sending PUSCH, the nominal power P used in its Power Control.—_PUSeHInclude two parts：A part is the high-rise cell-specific parameters P provided.—_N。_{MINAL PUSeH}, another part is user's special parameters P.―_PUSeH, also Shu is said, ^ Shu ^ Ν Β are to own in the cell

The nominal power of the nominal power, i.e. cell-specific of the semi-static settings of UE, each UE also has the i.e. Ρ of the special nominal power offsets of UE.―_PUSeH, nominal power used in final UE is two parts sum i.e. P.―_puseH.Its nominal power can be used and identical value in PUSCH Power Controls in SRS Power Controls.

It is 3bit path loss compensating factor, informs that the path loss compensating factor can be used and identical value in PUSCH Power Controls in UE, SRS Power Controls by high level.Represent that UE based on the path loss values estimated by downlink reference signal, uses the value used in current PUSCH Power Controls in SRS Power Controls.

In above-mentioned Rel-10 SRS power control values, SRS can share identical ring opening moiety and closed loop portion in PUSCH Power Controls, i.e., using the parameter in PUSCH Power Controls^{Po pusa}^,^ac ) , ^Ρ^ and 0'), from formula（1) understand, relative to PUSCH Power Controls, SRS Power Controls add a deviant

^c ^) Secondly, illustrate to being illustrated under heterogeneous network scene the problem of SRS power controls.

Under the CoMP scenes 3 and scene 4 of Rel-11 heterogeneous network scenes, because pico eNB (are similar to RRH, i.e., distal end is without the end of a thread）With the difference of macro eNB transmit powers, for some CoMP UE, can there is a situation where that its descending CoMP sending point is different with up CoMP receiving points.

Fig. 1 is the schematic diagram of CoMP scenes 3/4.As shown in figure 1, the descending of CoMP UE is by macro base station（Macro eNB) signal is sent, and due to the CoMP UE apart from RRH1 closer to it is to receive signal by RRH1 that its is up.In the case, DL CoMP sending point is different with UL CoMP receiving point.So, if DL CoMP sending point and UL CoMP receiving point are required for obtaining the SRS that UE is sent, above-mentioned Rel_10 SRS power control flows mechanism is no longer applicable.

For example, for time division duplex（Time Division Duplexing, TDD) system, using the reciprocity of up-downgoing channel, SRS is applied not only to estimation UL channel condition informations (Channel State Information, CSI), also it is used in estimation DL channel condition informations.I.e. not only UL CoMP receiving point needs to receive the SRS that the CoMP UE are sent, and the sending point of the DL CoMP is also required to receive the SRS that the CoMP UE are sent, so that the sending point of the DL CoMP can estimate the sending point of the DL CoMP to the CSI between CoMP UE.But in the case of the CoMP UE shown in Fig. 1, the SRS power control flows mechanism in Rel-10 is no longer applicable.Reason is：

In Rel-10 SRS power control flows, its open loop power control (Open Loop Power Control, OLPC) part and closed-loop power control（Closed Loop Power Control, CLPC) part with PUSCH power controls（Power control, PC) binding, that is, reuse PUSCH open loop and the parameter of closed loop.And under the CoMP scenes shown in Fig. 1, because DL CoMP sending point is different from UL CoMP receiving point, the path loss change of the link between link and UL CoMP to UE between DL CoMP to UE is separate, and there is the path loss difference of DL links and UL links.According to the flow of Rel-10 SRS power controls, the dynamic change of up path loss is compensated by PUSCH closed-loop power controls, that is, passes through formula（1) the close-loop power control adjusted value in《To compensate.Network-side can not individually adjust SRS power controls to adapt to the change of its dynamics of channels, when especially SRS is sent to the sending point of the DL CoMP, existing SRS power controls can not realize dynamic adjustment SRS transmit power with adapt to the CoMP UE to the DL CoMP sending points link independently of the link to UL CoMP channel variation.

In addition, under heterogeneous network scene, the power for being sent to Macro eNB is higher than the transmit power for being sent to RRH1, if keeping Rel-10-individual SRS power control mechanism flows, or based on the power that SRS transmit power can be properly received with Nacro eNB, based on the power that can be properly received with RRH1, both of which can produce problem, as stated in the Background Art.Therefore, it is necessary to solve SRS power controls under Rel-11 CoMP scenes Problem, so as to both be easy to UL CoMP CSI to estimate to also allow for DL CoMP CSI estimations.

The solution discussed in current 3GPP RAN1 standards mainly has the following two kinds：

The first：

Multiple power offset values ^S-^sET^^, m=0, l, 2 are introduced in SRS power control formula ..., N-l_rAnd its number range expands.In former Rel-10 SRS power controls, there are two power offset values^Ρ.Corresponding power offset values ^ during the standing grain p of w=0=1.

In this approach, relative to Rel-10 SRS power controls, W >=2 are introduced_SRSPower offset values, so as to realize A-SRS when being sent to DL CoMP and being sent to UL CoMP using different SRS power offset values.Wherein, it is different types of SRS to be sent to DL CoMP sending points and be sent to the SRS of UL CoMP receiving points, for example, that be sent to DL CoMP sending points is A-SRS, and that be sent to UL CoMP receiving points is P_SRS, then two values.For example, the SRS for being sent to DL CoMP is A-SRS, the SRS for being sent to UL CoMP both can be that A-SRS can also be P_SRS.So now need 3 power offset values.

But it is desirable to need to be expanded to how many by the scope of simulating, verifying this power offset values and need several SRS power offset values i.e. W numerical values recited.And this method can not distinguish DL CoMP, UL CoMP to dynamic, the independent channel variation between the user link.

Second：A power control procedures are introduced separately into be sent to DL CoMP SRS.But currently without concrete implementation scheme.

The embodiment of the present invention in SRS power controls mainly for extra closed-loop power control is introduced to solve the above problems.By the following examples under the CoMP scenes to illustrate the embodiment of the present invention uplink SRS transmitted power control method and its device.

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 for multipoint cooperative（CoMP) system, when the descending sending point of CoMP user equipment is different with uplink receiving point, as shown in Fig. 2 in user equipment side, this method includes：

Step 201, it is special using user（UE-Specifi c) close-loop power control initial value to the detection reference signal that is sent to the descending sending point（SRS closed-loop power control value) is adjusted；Wherein, the difference of path loss of the special close-loop power control initial value of the user according to descending sending point and uplink receiving point of acquisition to the CoMP user equipment is determined； Step 202, determine that present sub-frame sends the power control value of detection reference signal to the descending sending point using the closed-loop power control value, power bias value and open-loop power control value.

In the present embodiment, descending sending point is DL CoMP sending points, can be that macro base station can also be micro-base station or RRH;Uplink receiving point is UL CoMP receiving points, can be that macro base station can also be micro-base station or RRH.

When the DL CoMP sending points are different with the UL CoMP receiving points, the DL CoMP sending points are separate to the link between the CoMP UE and the UL CoMP receiving points to the path loss change between the link between the CoMP UE, and there is path loss difference.If PUSCH power control mechanism operational excellences, the SRS power controls for being sent to the UL CoMP receiving points can be good at compensating the UL CoMP receiving points to the path loss PL of the link between the CoMP UE.In the SRS power controls for being now sent to the DL CoMP sending points, the PL of the DL CoMP sending points to the CoMP UE and the UL CoMP receiving points are realized to the difference of the path loss between the PL of the CoMP UE closed-loop power control special dependent on the user.Wherein, the DL CoMP sending points and UL CoMP receiving points are compensated to the path loss difference of the CoMP UE by the initial value of closed-loop power control.

Therefore, in step 201, close-loop power control initial value is determined to the path loss difference of the CoMP UE using DL CoMP sending points and UL CoMP receiving points.

In the present embodiment, the close-loop power control initial value use/^ (0) is represented, the close-loop power control initial value formula（2) it is expressed as： (0) = /_ε (0) + ΔΡ ( 2 )

In formula（2) in ,/_£(0) the close-loop power control initial value being sent in the power control value of the uplink SRS of ULCoMP receiving points is represented, it can be used and PUSCH close-loop power control identical values.Therefore, different from PUSCH power controls closed-loop power control initial value/_£(0), UE-Specific closed-loop power controls introduced in the Power Control for being sent to the SRS of DL CoMP sending points, its initial value/^ (0) relative to/_£(0) there is an offset value delta Ρ ￡.

In addition, in step 201, can be adjusted using cumulative power control mode and absolute value power control mode to closed-loop power control value.If the closed-loop power control value of present sub-frame is with representing.

When using cumulative power control mode, the closed-loop power control value formula（3) it is expressed as：

Κ (0 = K (i - 1) + δ _H,_c (i - K ) ( 3 )

When using absolute value power control mode, the closed-loop power control value formula（4) it is expressed as：

(0 = ^PUSCH (^Z_ ^ PUSCH) (4) in above-mentioned formula（3) and（4) in ,-^ represents（Z'-l) closed-loop power control value during subframe, USCH_;C-^PUSCH) represent subframe（ z' _ ^_PUSCH) when DCI signalings indicated by transmit power control instruction（TPC Command) value.Wherein,^PUSCHWhat is represented is subframe label "^PUSCH；^PUSCHRepresent sub-frame offset.^ in FDD (Frequency Division Duplexing) system^ρυίίαι=4;Time division duplex（TDD) in system, it can be configured according to different UL/DL, ^PUSCH takes different values.

In the present embodiment, in step 202., utilizing the closed-loop power control value/^, (0, power bias value and open-loop power control value determine that present sub-frame sends SRS power control value to the DL CoMP sending points.Wherein, power control value P_E(0 represents, uses formula（5) it is expressed as：

Pc (0 ⁼ ^S S OFFSET PUSCH,c (j) + a_c(j)-PL_c +h_c{ i) (5) are in formula（5) implication and formula of each amount in（1) similar, here is omitted.

Wherein, open loop power control（OLPC) the parameter of part,⁵。—_1>1^ 。(') + «_£( ' _£Can be identical with the parameter for the OLPC parts being sent in the SRS power control values of UL CoMP receiving points, it such as may be based on the parameter of PUSCH OLPC parts.In addition, P_SRS―。 _FFSETIt ^) can also use the power offset values with being sent in the SRS power control values of UL CoMP receiving points.

So, obtaining the power control value, (after 0, this method may also include：

Step 203, according to the power control value P of determination_E(0 and it is allocated to the transmit power P that the CoMP user equipment is sent to serving cell c in subframe in this prior_eMA^ () determines that the CoMP user equipment sends the power P of detection reference signal to the descending sending point_SRS>£(0；

Wherein, (0 and the value of minimum can be selected as the transmit power P that uplink SRS is sent to DL CoMP sending points in being pre-configured with the transmit power MAX O that serving cell c is sent in subframe to the UE from the ^_SRS).That is corpse_SRS,_C ('·) = min { _CMAX;C (), P_c () } ( 6 )

In the present embodiment, step 203 is optional step.

From above-described embodiment, to be sent to SRS Power Controls one independent closed-loop power control value of introducing of descending sending point, specifically, using descending sending point and uplink receiving point close-loop power control initial value is determined to the path loss difference of the CoMP UE, so as to be adjusted to the closed-loop power control value that present sub-frame sends SRS to the descending sending point, and determined to send the power control value of uplink SRS to the descending sending point according to the closed-loop power control value of adjustment, so as to solve the problems, such as the current SRS power controls present in heterogeneous network.

In the present embodiment, this method may also include：Receive the instruction that the affiliated serving cell of the CoMP user equipment is sent, the instruction is used to indicating the CoMP user equipment using the special closed-loop power control value of the user to under described The closed-loop power control value that row sending point sends detection reference signal is adjusted.Wherein, the base station of the serving cell can notify the CoMP UE using lbit signaling.So so that the CoMP UE are adjusted according to the instruction received to the transmission SRS of UE Power Control.

In the present embodiment, if the user equipment does not receive the instruction of base station side transmission or receives base station side instruction based on PUSCH identical closed-loop power control values, then the CoMP user equipment based on PUSCH identicals closed-loop power control value come determine send SRS power, similarly to the prior art, this is repeated no more.

In the present embodiment, this method may also include：The descending sending point and uplink receiving point are obtained to the difference of the path loss of the CoMP user equipment.Wherein, the following two kinds mode can be used：

Receive the descending sending point of the affiliated serving cell notice of the CoMP user equipment and the difference of the path loss of the uplink receiving point to the CoMP user equipment；

In this fashion, the difference of the path loss is determined by network-side and notifies the UE, can notified using high-rise semi-static RRC signaling.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 relevant information includes：The pilot signal that the descending sending point is sent with the transmission power value of uplink receiving point pilot signal transmitted or the descending sending point with the difference of the transmission power value of uplink receiving point pilot signal transmitted and the descending sending point with uplink receiving point reaches the difference of the receiving 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 that the path loss is obtained through the above way, for example, after for receiving accidental access response, the UE issues the SRS of descending CoMP sending points, and its special close-loop power control initial value can use above-mentioned formula（2) calculate and obtain, wherein ,=（^Q) + ^ = ^P-P + ^Δ+ ；Wherein^δIt is the TPC command values indicated in accidental access response signal, " is the value that high-level signaling is indicated, represents that UE sends the power accumulation adjusted value of accidental access signal.For example, for other situations, the UE issues the SRS of descending CoMP sending points, its Power Control initial value is that network side is notified or user side calculates the difference of the path loss obtained.

In the present embodiment, this method also includes：In the special nominal power offset P of the user of the affiliated serving cell notice of the CoMP user equipment.―_puse.Change or when the CoMP user equipment receives accidental access response signal, reset the close-loop power control initial value.Obtain the difference of path loss from network side again or obtain the relevant information for the difference for determining the path loss, and close-loop power control is obtained according to the above- mentioned information of reacquisition Initial value.

From above-described embodiment, user equipment can solve the problems, such as the current SRS power controls present in heterogeneous network according to the instruction received using the special close-loop power control of user；In addition, the information that can be also sent according to network side is reset to the close-loop power control initial value.

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 descending sending point of CoMP user equipment is different with uplink receiving point, in network-side, this method includes：

From above-described embodiment, the base station of the affiliated serving cell of CoMP user equipment can send the relevant information that the descending sending point and the uplink receiving point determine the difference of the path loss to the difference of the path loss of the CoMP user equipment or transmission to the UE, so that the CoMP UE determine the special close-loop power control initial value of user according to the information received, so as to be adjusted according to the close-loop power control initial value to its closed-loop power control value, the current SRS power controls present in heterogeneous network are solved the problems, such as.

In the present embodiment, the serving cell can pass through high-rise wireless heterogeneous networks（RRC) signaling is spaced the relevant information of the difference for updating the path loss or the difference of the determination path loss to schedule；Or, the serving cell can determine whether the relevant information for updating the difference of the path loss or determination and the difference correlation of the path loss according to the signal quality of the uplink SRS received, so as 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 sent to the CoMP user equipment to be instructed, and the instruction is used to indicate that the CoMP user equipment is adjusted the closed-loop power control value for sending detection reference signal to the descending sending point using the special close-loop power control initial value of user；Or, the instruction For indicating that the CoMP user equipment is still adjusted using the special close-loop power control initial value of user using with uplink data channels identical close-loop power control initial value to the closed-loop power control value for sending detection reference signal to the descending sending point.

Wherein, for not indicating to use the in the case of of the closed-loop power control value for sending detection reference signal to the descending sending point being adjusted with uplink data channels identical close-loop power control initial value, can give tacit consent to use being modulated in the case where not receiving instruction with uplink data channels identical close-loop power control initial value in base station side and UE sides.

In the present embodiment, the base station of the serving cell can be by the lbit signalings in DCI signalings by the instruction notification CoMP UE

From above-described embodiment, the base station of the affiliated serving cell of user equipment can send to the UE and indicate that it uses the instruction of the special close-loop power control of user, so that SRSs of the UE according to the instruction to being sent to DL CoMP sending points Power Control is adjusted, the current SRS power controls present in heterogeneous network are solved the problems, such as.

In the present embodiment, this method also includes：The serving cell determines the descending sending point and uplink receiving point to the difference of the path loss of the CoMP user equipmenies.In this case, the difference of the path loss is determined by network-side and notifies the CoMP user equipment.

In another embodiment, the CoMP user equipment is notified to determine the relevant information of the difference of the path loss by network side so that the CoMP user equipment determines the difference of the path loss according to the relevant information.In this case, this method also includes：Obtain the relevant information for the difference for determining the path loss；The relevant information includes：The pilot signal that the descending sending point is sent with the transmit power of uplink receiving point pilot signal transmitted or the descending sending point with the difference of the transmission power value of uplink receiving point pilot signal transmitted and the descending sending point with uplink receiving point reaches the difference of the receiving power of the CoMP user equipment；The relevant information of acquisition is notified into the CoMP user equipment.

In the present embodiment, the CoMP user equipment can reset the special close-loop power control initial value of the user.So, this method also includes：The serving cell notifies the special nominal power offset p of the CoMP user equipment users¹0-UE-PUSCH, change ru- or, the random access guiding that the base station of the serving cell is sent according to the CoMP user equipment received sends accidental access response signal to the CoMP user equipment.

In above-mentioned two situations, the CoMP user equipment can be reset to its close-loop power control initial value, i.e., obtain the difference of the path loss from network side again or determine the relevant information of the difference of the path loss.

The transmitted power control method of the uplink detection reference signal of the embodiment of the present invention is described in detail the scene shown in 1 below in conjunction with the accompanying drawings.This method is used for multipoint cooperative（CoMP) system, in the descending of CoMP user equipment When sending point is different with uplink receiving point.Wherein, for CoMP UE, the DL CoMP sending points are macro base station, and the UE CoMP receiving points are 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 the present embodiment, the difference Δ Ρ 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 is sent to the CoMP user equipment to be instructed, and the instruction is used to indicate that the CoMP user equipment is adjusted the closed-loop power control value for sending detection reference signal to the descending sending point using the special close-loop power control initial value of user；

Wherein, the special close-loop power control initial value of the user is the difference Δ Ρ ￡ determinations of path loss of the CoMP user equipment according to descending sending point and uplink receiving point of acquisition to the CoMP user equipment, is specifically shown in formula（2).

In the present embodiment, the affiliated serving cell c of the CoMP user equipment can be macrocell, or Microcell；Under the scene shown in Fig. 1, the serving cell is macrocell, then sends the instruction from serving cell c base station to the CoMP UE；

In the present embodiment, the instruction can be placed in Downlink Control Information DCI and notify the CoMP UE, the UE can be notified using 1 bit, when such as 1 bit is " 1 ", it can represent to be adjusted the closed-loop power control value for sending SRS to the descending sending point using the special closed-loop power control value of user；When such as 1 bit is " 0 ", it can represent to be adjusted the closed-loop power control value for sending SRS to the descending sending point without using the special closed-loop power control value of user, such as use the closed-loop power control value based on PUSCH, vice versa.

Step 302, the serving cell determines that the descending sending point and uplink receiving point notify the CoMP user equipment to the difference of the path loss of the CoMP user equipment, and by the difference of the path loss；

In the present embodiment, the difference formula of the path loss（7) it is expressed as：

APL = PL - PL

=AT-ARSRP are in formula（7) in,⁷Beautiful, ^ ∞ represent the transmission power value of macro eNB and pico eNB (or being RRH) pilot signal transmitted, ^^^ respectively.Represent that UE receives the received power value of the pilot signal from macro eNB and pico eNB respectively with ^^^^.The transmit power of macro eNB and pico eNB pilot signal transmitteds known to network-side, so that known AT values, the pilot signal that network-side can be sent with rough estimate up-downgoing CoMP in addition reaches UE receiving power difference 5P, for example, regard CoMP RSRP threshold values as 5P, so that Using formula（7) APL but not limited to this are obtained, A^ can be also obtained by other meansIn the above-described embodiments, step 301 and 302 execution sequence can mutually be put or perform side by side P.In user equipment side：Step 303, the CoMP UE receive the DL CoMP sending points and UL CoMP uplink receivings point to the difference Δ Ρ of the path loss of the CoMP UE

Step 304, the instruction that the affiliated serving cell c of the CoMP user equipment is sent is received；

The order of the step 303 and step 304 can side by side or displacement.

The implementation procedure of step 305 step 307 is similar with the wide step 203 of the step 20 shown in Fig. 2, and here is omitted.

In the present embodiment, this method also includes：

Step 308, in the special nominal power offset of the user of the affiliated serving cell c notices of the CoMP UE

_UE— _Puse.Change or when the CoMP user equipment receives the accidental access response signal that the random access guiding that the serving cell sent according to the CoMP UE is returned, reset the close-loop power control initial value (0) in the present embodiment, formula can be used（2) reset and be somebody's turn to do (0)_;

Wherein, high-rise wireless heterogeneous networks are passed through in serving cell c（RRC the CoMP UE U) is signaled_{E Puse}.Change ,/_£(0)=0, in this case, the UE is after the difference ^PL of path loss of network side transmission is received, can determine that the difference ^PL of the path loss is the special close-loop power control initial value ^ (0) of the user, that is, directly receiving the special close-loop power control initial value/^ (0) of user when the UE CoMP receive accidental access response signal from network side, f is wherein, it is the TPC command values indicated in accidental access response signal, ^ ^ are the values that high-level signaling is indicated, represent that UE sends the power accumulation adjusted value of accidental access signal.In this case, the UE need according to the difference Δ Ρ ￡ of the path loss and⁽⁰⁾=+calculates and obtains the special close-loop power control initial value h of the user_c(0) from above-described embodiment, the difference of path loss is determined by network side and closed-loop power control instruction is sent, user equipment can be according to the instruction received using the special close-loop power control of user, wherein close-loop power control initial value is determined using descending sending point and uplink receiving point to the path loss difference of the CoMP UE, so as to be adjusted to the closed-loop power control value that present sub-frame sends SRS to the descending sending point, and determined to send the power control value of uplink SRS to the descending sending point according to the closed-loop power control value of adjustment, so as to solve the problems, such as the current SRS power controls present in heterogeneous network；In addition, can also be reset to the close-loop power control initial value. 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 the present embodiment, notify UE to determine the difference Δ Ρ ￡ of path loss relevant information by network-side, the difference Δ Ρ of the path loss is determined by user side oneself.

In network-side, as shown in figure 4, this method includes：

Step 401, serving cell belonging to the CoMP user equipment is sent to the CoMP user equipment to be instructed, and the instruction is used to indicate that the CoMP user equipment is adjusted the closed-loop power control value for sending detection reference signal to the descending sending point using the special close-loop power control initial value of user；

Step 401 is similar with step 301, and here is omitted.

Step 402, the affiliated serving cell of CoMP user equipment sends the relevant information for the difference Δ Ρ ￡ for determining the path loss to the CoMP UE；

The relevant information includes：The pilot signal that the descending sending point is sent with the transmission power value Γ of uplink receiving point pilot signal transmitted or the descending sending point with the difference DELTA Γ of the transmission power value of uplink receiving point pilot signal transmitted and the descending sending point with uplink receiving point reaches the difference DELTA Λ of the receiving power of the CoMP user equipmentΡ；The difference ^ of the path loss is determined using the relevant information^SRP。

In user equipment side：

Step 403, the CoMP UE receive serving cell transmission the determination DL CoMP sending points and UL CoMP uplink receivings point to the difference Δ Ρ ￡ of the path loss of CoMP UE relevant information, and determine using the relevant information difference Δ Ρ of the path loss；

In the present embodiment, formula can be used（7) the difference Δ Ρ ￡ of the path loss are determined, here is omitted.Step 404, the instruction that the affiliated serving cell c of the CoMP user equipment is sent is received；

The order of the step 403 and step 404 can side by side or displacement.

The implementation procedure of step 405 step 407 is similar with the wide step 204 of the step 20 shown in Fig. 2, and step 408 is similar with step 308, and here is omitted.

From above-described embodiment, notified to determine the relevant information of the difference of path loss by network side and send closed-loop power control instruction, user equipment can determine the difference of the path loss according to the relevant information received, and according to the instruction received using the special close-loop power control of user,, so as to solve the problems, such as the current SRS power controls present in heterogeneous network；In addition, can also be reset to the close-loop power control initial value. One of ordinary skill in the art will appreciate that realizing that all or part of step in above-described embodiment method can be by program to instruct the hardware of correlation to complete, described program can be stored in a computer read/write memory medium, the program is upon execution, the all or part of step in above-described embodiment method can be included, described storage medium can include：R0M, RAM, disk, CD etc..

The embodiment of the present invention additionally provides a kind of base station and user equipment, as described in the following examples.Because the principle that the base station and user equipment solve problem is similar to the transmitted power control method of the above-mentioned uplink detection reference signal based on base station and user equipment, therefore the implementation of the base station and user equipment may refer to the implementation of method, repeats part and repeats no more.

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 descending sending point of the user equipment is different with uplink receiving point, as shown in figure 5, the user equipment 500 includes：Adjustment unit 501 and first processing units 502;Wherein,

Adjustment unit 501, the closed-loop power control value for being arranged to the detection reference signal using the special close-loop power control initial value of user to being sent to the descending sending point is adjusted；Wherein, the difference of path loss of the special close-loop power control initial value of the user according to descending sending point and uplink receiving point of acquisition to the CoMP user equipment is determined；

First processing units 502, are arranged to determine that present sub-frame sends the power control value of detection reference signal to the descending sending point using the closed-loop power control value, power bias value and open-loop power control value.

In the above-described embodiments, the working method of adjustment unit 501 and first processing units 502 is similar with step 201 and step 202, and here is omitted.

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 descending sending point of the user equipment is different with uplink receiving point, as shown in fig. 6, the user equipment 600 includes：Adjustment unit 601 and first processing units 602, its effect are similar with the adjustment unit 501 in embodiment 5 and the effect of first processing units 502, and here is omitted.

As shown in fig. 6, the user equipment 600 may also include：First receiving unit 603, first receiving unit 603 is arranged to receive the instruction that the base station of the affiliated serving cell of CoMP user equipment is sent, and the instruction is used to indicate that the CoMP user equipment is adjusted the closed-loop power control value for sending detection reference signal to the descending sending point using the special closed-loop power control value of the user.So, the instruction that the adjustment unit 601 of the user equipment 600 can be received according to the first receiving unit 603 is adjusted using the special closed-loop power control value of the user to the closed-loop power control value for sending detection reference signal to the descending sending point. As shown in Figure 6, the user equipment 600 also includes second processing unit 604, second processing unit 604 is arranged to according to the power control value of determination and is allocated to the CoMP user equipment 600 and is in this prior sent to the transmit power of serving cell in subframe and determine that the CoMP user equipment sends the power of detection reference signal to the descending sending point, its concrete processing procedure is similar with step 203, and here is omitted.

As shown in fig. 6, the user equipment 600 also includes first acquisition unit 605, first acquisition unit 605 is arranged to obtain the descending sending point and uplink receiving point to the difference of the path loss of the CoMP user equipment.Wherein, the difference of the path loss can be directly received from the base station of the affiliated serving cell of CoMP user equipment；Or the relevant information for the difference for determining the path loss is received from the base station of the affiliated serving cell of CoMP user equipmenies, the difference of the path loss, such as previous embodiment Γ 4 are determined using the information, here is omitted.

As shown in fig. 6, going back user equipment 600 also includes the second receiving unit 606 and the first reset cell 607;Wherein,

Second receiving unit 606, is arranged to the special nominal power offset P of the user of the affiliated serving cell notice of the reception CoMP user equipment.—_{UE PUSeH}；Or receive the accidental access response signal for the random access guiding return that the serving cell is sent according to the CoMP user equipment；

First reset cell 607, is arranged in the special nominal power offset P of the user of the affiliated serving cell notice of the CoMP user equipment.—_PUSeHChange or when receiving accidental access response signal, reset the close-loop 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 here is omitted.From above-described embodiment, user equipment can be according to the instruction received using the special close-loop power control of user, so as to solve the problems, such as the current SRS power controls present in heterogeneous network；In addition, can also be reset to the close-loop power control initial value.

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 transmitting element 701, first transmitting element 701 is arranged to send the descending sending point and the uplink receiving point to the difference of the path loss of the CoMP user equipment to the CoMP user equipment, and the difference of the path loss determines the special close-loop power control initial value of user for the user equipment.

There is above-described embodiment to understand, network side by the difference of the path loss by notifying the CoMP UE, so that the CoMP UE can determine the initial value of the special closed-loop power control of user according to the difference of the path loss, and power adjustment is carried out based on the initial value, 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, The base station also includes the 3rd processing unit 702, and the 3rd processing unit 702 is arranged to determine the descending sending point and uplink receiving point to the difference of the path loss of the CoMP user equipment.

As shown in Figure 7, base station 700 also includes the 3rd transmitting element 703,3rd transmitting element 703 is arranged to send to the CoMP user equipment and instructed, and the instruction is used to indicate that the CoMP user equipment is adjusted the closed-loop power control value for sending detection reference signal to the descending sending point using the special close-loop power control initial value of user；Or, the instruction is used to indicate that the CoMP user equipment is still adjusted the closed-loop power control value for sending detection reference signal to the descending sending point using with uplink data channels identical close-loop power control initial value using the special close-loop power control initial value of user.

So, user equipment, which does not receive instruction or carries out the close-loop power control initial value based on PUSCH when receiving using the instruction being adjusted with uplink data channels identical close-loop power control initial value to the closed-loop power control value for sending detection reference signal to the descending sending point, carries out power adjustment；When receiving the instruction being adjusted using the special close-loop power control initial value of user to the closed-loop power control value for sending detection reference signal to the descending sending point, power adjustment is carried out based on the special close-loop power control initial value of user.

In the present embodiment, network side can be semi-statically configured to the difference of the path loss, and notify the UE to reset the difference of the path loss.So, the base station also includes the second reset cell 704, second reset cell 704 is arranged to semi-statically reset the difference of the path loss, the difference for updating the path loss can be wherein spaced to schedule, or is determined whether according to the signal quality of the uplink SRS received to update the difference of the path loss.

And network side also notifies the UE to reset the difference of the path loss by information.In this case, the base station also includes the 4th transmitting element 705, and the 4th transmitting element is arranged to notify the nominal power offset P that CoMP user equipment user is special.—_{UE puse}.；Or, the random access guiding for being arranged to be sent according to the CoMP user equipment received sends accidental access response signal to the CoMP user equipment.In both cases, after the UE receives the above- mentioned information of network side notice, the difference to path loss is reset.

From above-described embodiment, the lateral UE of network sends instruction, and network side determines the difference of path loss and notifies the UE so that UE carries out close-loop power control according to instruction, solves problem present in SRS power control in the prior art.

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 transmitting element 801, the second transmitting element 800 is arranged to send the relevant information for the difference for determining the path loss to the CoMP user equipment, and the relevant information is used for the difference that the user equipment determines the path loss, and root The special close-loop power control initial value of user is determined according to the difference of the path loss；

From above-described embodiment, the lateral UE of network sends the relevant information for the difference for determining path loss so that UE carries out close-loop power control according to the relevant information, solves problem present in SRS power control in the prior art.

As shown in figure 8, the base station 800 also includes fourth processing unit 802, it is arranged to obtain the relevant information for the difference for determining the path loss.

Similar to Example 7, the base station also includes：3rd transmitting element 703 and the 4th transmitting element 704, here is omitted.

In addition, also including the 3rd reset cell 805, it is arranged to semi-statically reset the relevant parameter for the difference for determining path loss.

From above-described embodiment, the lateral UE of network sends instruction, and network side notifies to determine the relevant information of the difference of path loss, the UE determines the difference of the path loss according to the relevant information, and close-loop power control is carried out according to instruction, solve problem present in SRS power control in the prior art.In addition, can also be semi-statically configured the relevant information.

In the embodiment shown in Fig. 7 and Fig. 8, all parts can be according to actual conditions independent assortment.For example, a base station is provided simultaneously with the part or all of part in Fig. 7 and Fig. 8, here is omitted.

The embodiment of the present invention also provides a kind of computer-readable program, wherein when performing the program in CoMP user equipment, the program causes computer to perform the transmitted power control method of the uplink detection reference signal described in embodiment 1,3,4 in the CoMP user equipment.

The embodiment of the present invention also provides a kind of storage medium for the computer-readable program that is stored with, and the wherein computer-readable program causes computer to perform the transmitted power control method of the uplink detection reference signal described in embodiment 1,3,4 in CoMP user equipment.

The embodiment of the present invention also provides a kind of computer-readable program, wherein when performing the program in a base station, the program causes computer to perform the transmitted power control method of the uplink detection reference signal described in embodiment 2,3,4 in the base station.

The embodiment of the present invention also provides a kind of storage medium for the computer-readable program that is stored with, and the wherein computer-readable program causes computer to perform the transmitted power control method of the uplink detection reference signal described in embodiment 2,3,4 in a base station. Apparatus and method more than of the invention can be realized by hardware, can also be realized by combination of hardware software.The present invention relates to such computer-readable program, when the program is performed by logical block, the logical block can be made to realize devices described above or component parts, or the logical block is realized various methods or step described above.The invention further relates to the storage medium for storing procedure above, such as hard disk, disk, CD, DVD, flash memory.Above in association with specific embodiment, invention has been described, it will be appreciated by those skilled in the art that these descriptions are all exemplary, it is not limiting the scope of the invention.Those skilled in the art can make various variants and modifications to the present invention according to spirit and principles of the present invention, and these variants and modifications are also within the scope of the invention.

Claims

Standing grain ' " ^

1st, a kind of transmitted power control method of uplink detection reference signal, for multipoint cooperative（CoMP) system, when the descending sending point of CoMP user equipment is different with uplink receiving point, methods described includes：

The closed-loop power control value of detection reference signal using the special close-loop power control initial value of user to being sent to the descending sending point is adjusted；Wherein, the special close-loop power control initial value of the user is determined according to the descending sending point of acquisition and the difference of uplink receiving point to the path loss of the CoMP user equipment；

Determine that present sub-frame sends the power control value of detection reference signal to the descending sending point using the closed-loop power control value, power bias value and open-loop power control value.

2nd, according to the method described in claim 1, wherein, methods described also includes：

The instruction that the base station of the affiliated serving cell of CoMP user equipment is sent is received, the instruction is used to indicate that the CoMP user equipment is adjusted the closed-loop power control value for sending detection reference signal to the descending sending point using the special close-loop power control initial value of the user.

3rd, according to the method described in claim 1, wherein, methods described also includes：

According to the power control value of determination and it is allocated to the CoMP user equipment transmit power of serving cell is sent on the present sub-frame and determine that the CoMP user equipment sends the power of detection reference signal to the descending sending point.

4th, according to the method described in claim 1, wherein, methods described also includes：The descending sending point and uplink receiving point are obtained to the difference of the path loss of the CoMP user equipment.

5th, method according to claim 4, wherein, the difference of the path loss of the descending sending point of acquisition and uplink receiving point to the CoMP user equipment, including：

Receive the difference of the path loss of the descending sending point and uplink receiving point of the affiliated serving cell notice of the CoMP user equipment to the CoMP user equipment；Or,

Receive the relevant information of the difference of path loss described in the determination that the affiliated serving cell of the CoMP user equipmenies is sent；The relevant information includes：The descending sending point reaches the difference of the receiving power of the CoMP user equipment with the transmission power value of uplink receiving point pilot signal transmitted or the descending sending point with the difference of the transmission power value of uplink receiving point pilot signal transmitted and the descending sending point with the pilot signal that uplink receiving point is sent；The difference of the path loss is determined using the relevant information.

6th, according to the method described in claim 1, wherein, the special close-loop power control initial value of the user is Sent to the uplink receiving point close-loop power control initial value and the path loss difference in the power control value of detection reference signal and；Or,

The special close-loop power control initial value of the user is the difference of the path loss.

7th, according to the method described in claim 1, wherein, methods described also includes：

When the special nominal power offset of the user that the affiliated serving cell of the CoMP user equipment is notified changes or receives accidental access response signal in the CoMP user equipment, the close-loop power control initial value is reset.

8th, a kind of transmitted power control method of uplink detection reference signal, for multipoint cooperative（CoMP) system, when the descending sending point of CoMP user equipment is different with uplink receiving point, methods described includes：

Serving cell belonging to the CoMP user equipment sends the descending sending point and uplink receiving point to the difference of the path loss of the CoMP user equipment to the CoMP user equipment, and the difference of the path loss is used to determine the special close-loop power control initial value of user for the user equipment；Or,

Serving cell belonging to the CoMP user equipment sends the relevant information for the difference for determining the path loss to the CoMP user equipment, the relevant information is used for the difference that the path loss is determined for the user equipment, and the special close-loop power control initial value of user is determined according to the difference of the path loss, the relevant information includes：The descending sending point reaches the difference of the receiving power of the CoMP user equipment with the transmission power value of uplink receiving point pilot signal transmitted or the descending sending point with the difference of the transmission power value of uplink receiving point pilot signal transmitted and the descending sending point with the pilot signal that uplink receiving point is sent.

9th, method according to claim 8, wherein, the serving cell sends the relevant information of the difference of the path loss or the difference of the determination path loss by high-rise semi-static radio resource control signaling.

10th, method according to claim 8, wherein, serving cell belonging to the CoMP user equipment is sent to the CoMP user equipment to be instructed, described to instruct for indicating that the CoMP user equipment is adjusted using the special close-loop power control initial value of user to the closed-loop power control value for sending detection reference signal to the descending sending point；Or,

It is described to instruct for indicating that the CoMP user equipment is still adjusted using the special close-loop power control initial value of user using with uplink data channels identical close-loop power control initial value to the closed-loop power control value for sending detection reference signal to the descending sending point.

11st, method according to claim 8, wherein, before the difference of the path loss is sent to the CoMP user equipment, methods described also includes： Determine the descending sending point and uplink receiving point to the difference of the path loss of the CoMP user equipment.

12nd, method according to claim 8, wherein, before the relevant parameter for the difference for determining the path loss is sent to the CoMP user equipment, methods described also includes：

Obtain the relevant information for the difference for determining the path loss.

13rd, method according to claim 8, wherein, methods described also includes：

The nominal power offset for notifying the CoMP user equipment user special；Or,

The random access guiding sent according to the CoMP user equipment received sends accidental access response signal to the CoMP user equipment.

14th, method according to claim 8, wherein, methods described 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.

15th, a kind of user equipment, the user equipment includes：

Adjustment unit, the closed-loop power control value that the adjustment unit is arranged to the detection reference signal to being sent to the descending sending point using the special close-loop power control initial value of user is adjusted；Wherein, the special close-loop power control initial value of the user is determined according to the descending sending point of acquisition and the difference of uplink receiving point to the path loss of the CoMP user equipment；

First processing units, the first processing units are arranged to determine that present sub-frame sends the power control value of detection reference signal to the descending sending point using the closed-loop power control value, power bias value and open-loop power control value.

16th, user equipment according to claim 15, wherein, the user equipment also includes：First receiving unit, first receiving unit is arranged to receive the instruction that the base station of the affiliated serving cell of CoMP user equipment is sent, and the instruction is used to indicate that the CoMP user equipment is adjusted the closed-loop power control value for sending detection reference signal to the descending sending point using the special close-loop power control initial value of the user.

17th, user equipment according to claim 15, wherein, the user equipment also includes：Second processing unit, the second processing unit is arranged to according to the power control value of determination and is allocated to the CoMP user equipment transmit power of serving cell is sent on the present sub-frame and determine that the CoMP user equipmenies send the power of detection reference signal to the descending sending point.

18th, user equipment according to claim 15, wherein, the user equipment also includes：First acquisition unit, the first acquisition unit is arranged to obtain the descending sending point and uplink receiving point To the difference of the path loss of the CoMP user equipment.

19th, method according to claim 15, wherein, the special close-loop power control initial value of the user be sent to the uplink receiving point close-loop power control initial value and the path loss difference in the power control value of detection reference signal and；Or, the special close-loop power control initial value of the user is the difference of the path loss.

20th, user equipment according to claim 15, wherein, the user equipment also includes：Second receiving unit, is arranged to receive the special nominal power offset of user that the affiliated serving cell of the CoMP user equipment notifies；Or receive the accidental access response signal for the random access guiding return that the serving cell is sent according to the CoMP user equipment；

First reset cell, first reset cell is arranged to, when the special nominal power offset of the user that the affiliated serving cell of the CoMP user equipment is notified changes or receives accidental access response signal in the CoMP user equipment, reset the close-loop power control initial value.

21st, a kind of base station, the base station includes：

First transmitting element, first transmitting element is arranged to send the descending sending point and uplink receiving point to the difference of the path loss of the CoMP user equipment to the CoMP user equipment, and the difference of the path loss is used to determine the special close-loop power control initial value of user for the user equipment.

22nd, base station according to claim 21, wherein, the base station also includes：

3rd processing unit, the 3rd processing unit is arranged to determine the difference of the path loss of the descending sending point and uplink receiving point to the CoMP user equipment.

23rd, a kind of base station, the base station includes：

Second transmitting element, second transmitting element is arranged to send the relevant information for the difference for determining the path loss to the CoMP user equipment, the relevant information is used to determine the difference of the path loss for the user equipment, and determines the special close-loop power control initial value of user according to the difference of the path loss；

Wherein, the relevant information includes：The descending sending point reaches the difference of the receiving power of the CoMP user equipmenies with the transmission power value of uplink receiving point pilot signal transmitted or the descending sending point with the difference of the transmission power value of uplink receiving point pilot signal transmitted and the descending sending point with the pilot signal that uplink receiving point is sent.

24th, base station according to claim 23, wherein, the base station also includes：

Fourth processing unit, obtains the relevant information for the difference for determining the path loss. 25th, the base station according to claim 21 or 23, wherein, the base station also includes：

3rd transmitting element, 3rd transmitting element is arranged to send to the CoMP user equipment and instructed, described to instruct for indicating that the CoMP user equipment is adjusted using the special close-loop power control initial value of user to the closed-loop power control value for sending detection reference signal to the descending sending point；Or,

It is described to instruct for indicating that the CoMP user equipment is still adjusted using the special close-loop power control initial value of user using with uplink data channels identical close-loop power control initial value to the closed-loop power control value for sending detection reference signal to the descending sending point.

26th, the base station according to claim 21 or 23, wherein, the base station also includes：

4th transmitting element, the 4th transmitting element is arranged to notify the nominal power offset that the CoMP user equipment user is special；Or, the random access guiding for being arranged to be sent according to the CoMP user equipment received sends accidental access response signal to the CoMP user equipment.

27th, the base station according to claim 21 or 23, wherein, the base station also includes：

Second reset cell, second reset cell is arranged to semi-statically reset the difference of the path loss or determines the relevant parameter of the difference of path loss.

28th, a kind of computer-readable program, wherein when performing described program in CoMP user equipment, described program causes computer to perform the transmitted power control method of the uplink detection reference signal as described in any one claim of claim 1 to 7 in the CoMP user equipment.

29th, a kind of storage medium for the computer-readable program that is stored with, wherein the computer-readable program causes computer to perform the transmitted power control method of the uplink detection reference signal as described in any one claim of claim 1 to 7 in CoMP user equipment.

30th, a kind of computer-readable program, wherein when performing described program in a base station, described program causes computer to perform the transmitted power control method of the uplink detection reference signal as described in any one claim of claim 8 to 14 in the base station.

31st, a kind of storage medium for the computer-readable program that is stored with, wherein the computer-readable program causes computer to perform the transmitted power control method of the uplink detection reference signal as described in any one claim of claim 8 to 14 in a base station.