CN103037489A - Method and device for controlling uplink signal power - Google Patents

Abstract

The invention discloses a method and device for controlling uplink signal power. The method includes that a corresponding relation of closed loop power control commands and power revising value for a distributed antenna system and a CoMP system is built; an evolved node B (eNB) judges whether the corresponding relation is used for controlling user equipment (UE) to conduct uplink transmission power adjustment according to UE signals received by all receiving nodes; and on yes judgment, the eNB informs the UE to adjust the uplink transmission power according to the corresponding relation. By means of the technical scheme, a closed loop power adjusting capacity effect of long term evolution (LTE)/LET-A system is effectively improved, and a problem in the prior art that when the UE is arranged in the distributed antenna system or the CoMP system, the base station can not adjust UE uplink signal power reasonably is solved.

Description

Upward signal Poewr control method and device

Technical field

The present invention relates to the communications field, in particular to a kind of upward signal Poewr control method and device.

Background technology

Long Term Evolution (Long Term Evolution, referred to as LTE) uplink physical channel of system comprises Physical Random Access Channel (Physical Random Access Channel, referred to as PRACH), Physical Uplink Shared Channel (Physical Uplink Shared Channel, referred to as PUSCH), Physical Uplink Control Channel (Physical Uplink Control Channel is referred to as PUCCH).The up employing single-carrier frequency division multiple access of LTE (Signal-Carrier Frequency Division Multiple Access, be called for short SC-FDMA) technology, reference signal and data are multiplexing together by the mode of time division multiplexing (Time Division Multiplex is referred to as TDM).Uplink reference signals is divided into demodulated reference signal (Demodulation Reference Signal is referred to as DMRS) and measuring reference signals (Sounding Reference Signal is referred to as SRS).

Because the up employing SC-FDMA technology of LTE, different user devices (User Equipment in the residential quarter, abbreviation UE) be mutually orthogonal between the upward signal, therefore uplink power control is mainly used in the path loss (pathloss of compensate for channel, be called for short PL) and shadow fading, and be used for suppressing presence of intercell interference.Uplink power control process in the LTE system can be controlled the transmitting power of the channels such as PUSCH/PUCCH and SRS.

The computing formula of the up PUSCH transmitting power of Rel-10 version LTE agreement is:

$P_{\mathrm{PUSCH},c}\left(i\right)=\min \left\{\begin{array}{c}{P}_{\mathrm{CMAX},c}\left(i\right),\\ 10{\log }_{10}\left(M_{\mathrm{PUSCH},c}\left(i\right)\right)+P_{O\_\mathrm{PUSCH},c}\left(j\right)+{\mathrm{\α}}_c\left(j\right)\·{\mathrm{PL}}_c+{\mathrm{\Δ}}_{\mathrm{TF},c}\left(i\right)+f_c\left(i\right)\end{array}\right\}$

In the above-mentioned formula:

R _{CMAX, c}(i) be that maximum on this carrier wave allows transmitting power, depend on the power class of UE, determined the maximum capacity of UE transmitting power.

M _{PUSCH, c}(i) be the PUSCH resource size of the upper distribution of subframe i on this carrier wave, with fast (the Resource Block of resource, referred to as RB) expression, the number of the RB that namely distributes, power spectral density (Power Spectral Density on each RB that UE distributes, referred to as PSD) all equate, and transmitting power is directly proportional with the RB number that distributes.

P _{O_PUSCH, c}(j) represent on this carrier wave do not consider path loss impact (supposing that UE is just in base station side) time target transmit power of UE when satisfying the transmission requirement.

α _c(j) expression is part path loss penalty coefficient on this carrier wave, α _c(j) value has α _c{ 0,0.4,0.5,0.6,0.7,0.8,0.9,1} is the proprietary parameter in residential quarter of 3 bit to ∈, is provided by the upper strata.α _c(j)=1 expression Complete Path loss balancing, namely each user to arrive the signal to noise ratio of the signal of base station be identical, the transmitting power of Cell Edge User is very high; α _c(j)=0 expression does not have the path loss compensation, and the base station can be very high to the received power of Cell Center User, and is very low to the received power of Cell Edge User; 0＜α _c(j)＜1 expressed portion sub-path loss balancing, the loss of Cell Center User path loss compensation is very little, and the loss of Cell Edge User path loss compensation is larger.It is little that this design can guarantee that the Cell Center User throughput descends, simultaneously so that Cell Edge User has reducing to a certain degree to the interference of neighbor cell.

PL _cBe the downlink path loss value that calculates on this carrier wave, be used for up path loss and estimate.

f _c(i) be close-loop power control parameter on this carrier wave, provided by Radio Resource control (Radio Resource Control is referred to as RRC) that two types of accumulation and absolute values are arranged.This parameter is the synthesis result of closed-loop power control and minizone power control in the residential quarter.

If up-link carrier has disposed PUSCH and PUCCH when transmitting simultaneously, up PUSCH power control process formula is:

$P_{\mathrm{PUSCH},c}\left(i\right)\text{=min}\left\{\begin{array}{c}10{\log }_{10}({\hat{P}}_{\mathrm{CMAX},c}\left(i\right)-{\hat{P}}_{\mathrm{PUCCH}}\left(i\right)),\\ 10{\log }_{10}\left(M_{\mathrm{PUSCH},c}\left(i\right)\right)+P_{O\_\mathrm{PUSCH},c}\left(j\right)+{\mathrm{\α}}_c\left(j\right)\·{\mathrm{PL}}_c+{\mathrm{\Δ}}_{\mathrm{TF},c}\left(i\right)+f_c\left(i\right)\end{array}\right\}$

Wherein

It is the linear value of the transmitting power of PUCCH.Parameter in the power dominated formulate of all the other parameters and the PUSCH transmitting power of above-mentioned Rel-10 is identical.

The control procedure formula of the up PUCCH transmitting power of Rel-10 version LTE agreement is:

$P_{\mathrm{PUCCH}}\left(i\right)=\min \left\{\begin{array}{c}{P}_{\mathrm{CMAX},c}\left(i\right),\\ P_{0\_\mathrm{PUCCH}}+{\mathrm{PL}}_c+h(n_{\mathrm{CQI}},n_{\mathrm{HARQ}},n_{\mathrm{SR}})+{\mathrm{\Δ}}_{F\_\mathrm{PUCCH}}\left(F\right)+{\mathrm{\Δ}}_{\mathrm{TxD}}\left(F^{\′}\right)+g\left(i\right)\end{array}\right\}$

In the above-mentioned formula:

P _{CMAX, c}(i) be that maximum on this carrier wave allows transmitting power, depend on the power class of UE, determined the maximum capacity of UE transmitting power.

H (n _CQI, n _HARQ, n _SR) be the value relevant with the PUCCH form, determined by the specifying information bit number that PUCCH carries.

Δ _{F_PUCCH}(F) be the value relevant with the PUCCH form, determined by the PUCCH form.

Δ _TxDWhether (F ') is the value relevant with the PUCCH transmit diversity, use the transmit diversity mode to launch decision by PUCCH.

P _{O_PUSCH, c}(j) represent on this carrier wave do not consider path loss impact (supposing that UE is just in base station side) time target transmit power of UE when satisfying the transmission requirement.

PL _cBe the downlink path loss value that calculates on this carrier wave, be used for the up path loss and estimate.

G (i) is UE close-loop power control parameter, is provided by RRC, and two types of accumulation and current absolute values are arranged.This parameter is the synthesis result of closed-loop power control and minizone power control in the residential quarter.

The control procedure formula of the uplink SRS transmitting power of Rel-10 version LTE agreement is:

P _SRS，c(i)＝min{P _CMAX，c(i)，P _{SRS_OFFSET，c}(m)+10log ₁₀(M _SRS，c)+P _{O_PUSCH，c}(j)+α _c(j)·PL _c+f _c(i)}

In the above-mentioned formula:

P _{CMAX, c}(i) be the maximum transmitting power that allows on this carrier wave, depend on the power class of UE, determined the maximum capacity of UE transmitting power.

P _{SRS_OFFSET, c}(m) be SRS and the PUSCH transmitting power biasing coefficient of high-rise configuration.

M _{SRS, c}It is the current detective bandwidth that needs the SRS of emission.

P _{O_PUSCH, c}(j) represent on this carrier wave do not consider path loss impact (supposing that UE is just in base station side) time target transmit power of UE when satisfying the transmission requirement.

α _c(j) expression is part path loss penalty coefficient on this carrier wave, α _c(j) value has α _c{ 0,0.4,0.5,0.6,0.7,0.8,0.9,1} is the proprietary parameter in residential quarter of 3 bit to ∈, is provided by the upper strata.α _c(j)=1 expression Complete Path loss balancing, namely each user to arrive the signal to noise ratio of the signal of base station be identical, the transmitting power of Cell Edge User is very high; α _c(j)=0 expression does not have the path loss compensation, and the base station can be very high to the received power of Cell Center User, and is very low to the received power of Cell Edge User; 0＜α _c(j)＜1 expressed portion sub-path loss balancing, the loss of Cell Center User path loss compensation is very little, and the loss of Cell Edge User path loss compensation is larger.It is little that this design can guarantee that the Cell Center User throughput descends, simultaneously so that Cell Edge User has reducing to a certain degree to the interference of neighbor cell.

PL _cBe the downlink path loss value that calculates on this carrier wave, be used for upper walking along the street strength loss and estimate.

f _c(i) be UE close-loop power control parameter on this carrier wave, provided by RRC that two types of accumulation and current absolute values are arranged.This parameter is the synthesis result of closed-loop power control and minizone power control in the residential quarter.

At above-mentioned existing Rel-10 version LTE agreement (36.213 Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures) in the power control scheme, is used for the path loss values PL of compensation up path loss _cAll measuring the downlink path loss by UE obtains.The pilot signal power that UE receives by calculating and base station indicate the difference to the pilot transmit power of UE just can obtain the downlink path loss value by signaling, and the path loss compensation during as the control of upward signal power with the above-mentioned path loss values that calculates.

The path loss compensation is the part as the basic operate in open loop state point of UE transmitting power, its objective is that the power spectral density for uplink arranges a rough working point roughly, for modulation and the encoding scheme (Modulation and Coding Scheme is called for short MCS) of dispatching provides suitable power spectral density.And closed-loop control is as a kind of quick self-adapted power regulating method, close-loop power control be applied in operate in open loop state point around, the power fine setting is carried out in the divided ring working point, can reach control and disturb also Modulating Power setting with the adaptive channel condition purpose of (comprising rapid fading).

The method of the close-loop power control in the LTE standard of Rel-10 version is that eNB sends to UE by physical layer signaling with the closed-loop control order, after UE receives the closed-loop control order, according to 10.2.0 version LTE agreement (36.213 Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures) to the definition of closed-loop control order, according to the power variation of closed-loop control order appointment, adjusts the uplink transmit power of UE among the form 5.1.1.1-2 in and 5.1.1.1-3 and 5.1.2.1-1 and the 5.1.2.1-2.

At distributed multi-antenna system or cooperative multipoint transmission (Coordinate multi-point transmission, abbreviation CoMP) in the system, because sending node and the receiving node of the uplink and downlink signals of UE end might be inconsistent, to cause the uplink receiving node of the PL value that estimates according to the reference signal that descending sending node sends and reality not larger to the PL value difference between the UE, come the transmitted power of the UE side signal of up link is compensated with downlink estimation PL value out, will cause the inaccurate of UE end signal transmitting power estimation, waste UE transmitting power, increase the UE battery loss, affect the reception of upward signal of UE and increase to other users' interference.

Simultaneously, in the distributed multi-antenna system or according to 3GPP standard 36.819 (Technical Specification Group Radio Access Network; Coordinated Multi-Point Operation for LTE) in the CoMP system that the CoMP deployment scenario 4 in is disposed, when UE is in low power nodes (Low Power Nodes, abbreviation LPN) lower time of covering, residential quarter special reference signal (Cell Specific Reference Signal, referred to as CRS) send simultaneously by Serving cell and LPN, sending node and the receiving node of the uplink and downlink signals of UE all are LPN at this moment, then according to the ascending power control method in the Rel-10 LTE standard, need to use the referenceSignalPower parameter of cell broadcast service in the time of the loss of UE calculating path, and there is difference in the power of the CRS of the actual transmission of this parameter and LPN, therefore the PL value that calculates of UE and UE have larger error to the actual uplink PL value of LPN, also can cause the inaccurate of UE end signal transmitting power estimation this moment, waste UE transmitting power, increase the UE battery loss, and affect the reception of upward signal of UE and increase to other users' interference.

In above-mentioned scene, error is larger between the up path loss of the up path loss that UE estimates and reality, use the closed loop power control command of existing Rel-10 standard definition, because closed loop power control command is a kind of fine setting means, so its step-length is shorter, needing the base station repeatedly to issue closed loop power control command instruction UE carries out close-loop power control and just up path loss error compensation can be returned, expense is larger, and the time is longer, so that UE launched with inappropriate power within longer a period of time, the ascending power of UE can not get reasonable utilization, and increases the interference to other users.

Therefore, UE up-downgoing in being in distributed multi-antenna system or CoMP system is used different sending node and receiving nodes or is in the lower time of covering of LPN, the existing method of estimating about path loss can not reflect the path loss situation of actual uplink channel, cause larger path loss evaluated error, therefore need consideration how to strengthen the method for the ability of close-loop power control, so that in above-mentioned scene, can in time adjust by close-loop power control the power spectral density of the upward signal of UE, in order to reasonably control the transmit signal power of UE, guarantee the transmission of the upward signal of UE, reduce the loss of UE battery, can reduce again the interference to other users simultaneously.

Summary of the invention

For in the prior art when UE is in distributed multi-antenna system or the CoMP system, the problem of UE upward signal power can not reasonably be adjusted in the base station, the invention provides a kind of upward signal Poewr control method and device, to address the above problem.

According to an aspect of the present invention, provide a kind of upward signal Poewr control method, having comprised: set up for distributing antenna system and the closed loop power control command of CoMP system and the corresponding relation of power correction value; The signal of the UE that eNB receives according to each receiving node in the network judges whether to use above-mentioned corresponding relation control UE to carry out the uplink transmit power adjustment; When being, eNB notice UE adjusts uplink transmit power according to above-mentioned corresponding relation in judged result.

ENB according to network in the signal of the UE that receives of each receiving node, judge whether to use above-mentioned corresponding relation control UE to carry out after the uplink transmit power adjustment, also comprise: when the determination result is NO, eNB notice UE adjusts uplink transmit power according to the corresponding relation of general closed loop power control command and power correction value, wherein, the corresponding relation of general closed loop power control command and power correction value comprises one of following: the corresponding relation of closed loop power control command and power correction value in the Rel-10 version LTE standard, the corresponding relation of closed loop power control command and power correction value in the Rel-9 version LTE standard, the corresponding relation of closed loop power control command and power correction value in the Rel-8 version LTE standard.

Above-mentioned uplink transmit power comprise following one of at least: the uplink transmit power of the uplink transmit power of PUSCH, the uplink transmit power of PUCCH, SRS, the uplink transmit power of PRACH, the uplink transmit power of DMRS.

ENB adjusts uplink transmit power by signaling UE according to above-mentioned corresponding relation, and wherein signaling comprises one of following: high-level signaling, physical layer signaling.

Closed loop power control command in the above-mentioned corresponding relation is the closed loop power control command of 1 bit and/or 2 bits.

According to a further aspect in the invention, a kind of upward signal output control device is provided, comprise: use judge module, for the signal of the UE that receives according to each receiving node of network, judge whether to use for the closed loop power control command of distributing antenna system and cooperative multipoint transmission CoMP system and the corresponding relation control UE of power correction value and carry out the uplink transmit power adjustment; The first control module is used in the judged result of using judge module when being, notice UE is according to above-mentioned corresponding relation adjustment uplink transmit power.

Said apparatus also comprises: the second control module, be used for when using judge module the determination result is NO, notice UE adjusts uplink transmit power according to the corresponding relation of general closed loop power control command and power correction value, wherein, the corresponding relation of general closed loop power control command and power correction value comprises one of following: the corresponding relation of closed loop power control command and power correction value in the Rel-10 version LTE standard, the corresponding relation of closed loop power control command and power correction value in the Rel-9 version LTE standard, the corresponding relation of closed loop power control command and power correction value in the Rel-8 version LTE standard.

Above-mentioned uplink transmit power comprise following one of at least: the uplink transmit power of the uplink transmit power of PUSCH, the uplink transmit power of PUCCH, SRS, the uplink transmit power of PRACH, the uplink transmit power of DMRS.

The first control module is used for adjusting uplink transmit power by signaling UE according to above-mentioned corresponding relation, and wherein signaling comprises one of following: high-level signaling, physical layer signaling.

Closed loop power control command in the above-mentioned corresponding relation is the closed loop power control command of 1 bit and/or 2 bits.

By the present invention, adopt the closed loop power control command form that is provided on the basis of existing technology distributing antenna system and CoMP system, when UE is in distributing antenna system and CoMP system, eNB uses this closed loop power control command form that is used for distributing antenna system and CoMP system UE to be carried out the scheme of upward signal power control, effectively strengthened the closed power adjustment capability of LTE/LTE-A (LTE Advanced) system, solved in the prior art when UE is in distributed multi-antenna system or the CoMP system, the problem of UE upward signal power can not reasonably be adjusted in the base station.

Description of drawings

Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:

Fig. 1 is the flow chart according to the upward signal Poewr control method of the embodiment of the invention;

Fig. 2 is the flow chart of the upward signal power closed-loop control method of the example according to the present invention;

Fig. 3 is the application scenarios schematic diagram of the example one according to the present invention;

Fig. 4 is the application scenarios schematic diagram of the example two according to the present invention;

Fig. 5 is the application scenarios schematic diagram of the example three according to the present invention;

Fig. 6 is the structured flowchart according to the upward signal output control device of the embodiment of the invention.

Embodiment

Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.

Fig. 1 is the flow chart according to the upward signal Poewr control method of the embodiment of the invention.As shown in Figure 1, the upward signal Poewr control method according to the embodiment of the invention comprises:

Step S102 sets up for distributing antenna system and the closed loop power control command of CoMP system and the corresponding relation of power correction value;

The signal of the UE that step S104, eNB receive according to each receiving node in the network judges whether to use above-mentioned corresponding relation control UE to carry out the uplink transmit power adjustment;

Step S106, when being, eNB notice UE adjusts uplink transmit power according to this corresponding relation in judged result.

The method that present embodiment provides is inconsistent for the sending node of the receiving node of the up link that is in the UE end in distributed multi-antenna system or the CoMP system and down link, perhaps UE be in the distributed multi-antenna system or the CoMP system that disposes according to 3GPP standard deployment scene 4 in LPN cover lower time, the difference of UE up-downgoing path loss is larger, eNB can't reasonably adjust the problem of the uplink transmit power of UE, a kind of upward signal Poewr control method has been proposed, namely define new closed loop power control command under CoMP and the spaced antenna and the corresponding relation of power correction value of being exclusively used in, make eNB can notify when needed UE to adjust the uplink transmit power of UE according to power variation corresponding to the closed-loop control order that defines in this corresponding relation.Said method has strengthened the ability of close-loop power control, makes its effectively error of compensating for path loss estimation.

Preferably, eNB according to network in the signal of the UE that receives of each receiving node, judge whether to use above-mentioned corresponding relation control UE to carry out after the uplink transmit power adjustment, can also comprise: when the determination result is NO, eNB notice UE adjusts uplink transmit power according to the corresponding relation of general closed loop power control command and power correction value, wherein, the corresponding relation of general closed loop power control command and power correction value comprises one of following: the corresponding relation of closed loop power control command and power correction value in the Rel-10 version LTE standard, the corresponding relation of closed loop power control command and power correction value in the Rel-9 version LTE standard, the corresponding relation of closed loop power control command and power correction value in the Rel-8 version LTE standard.

Whether use newly-built need to adjusting according to actual conditions for the closed loop power control command under CoMP and the spaced antenna and the corresponding relation of power correction value, when not needing to use newly-built corresponding relation, the corresponding relation of the operable original general closed loop power control command of eNB and power correction value (Rel-10 for example, closed loop power control command in Rel-9 or the Rel-8 version LTE standard and the corresponding relation of power correction value are at Rel-10, above-mentioned corresponding relation is expressed as the closed loop power control command form in Rel-9 or the Rel-8 version LTE standard) control UE carry out the uplink transmit power adjustment.

Preferably, above-mentioned uplink transmit power can comprise following one of at least: the uplink transmit power of the uplink transmit power of PUSCH, the uplink transmit power of PUCCH, SRS, the uplink transmit power of PRACH, the uplink transmit power of DMRS.

Uplink transmit power to UE is controlled, mainly refer to one or more control the in the uplink transmit power of uplink transmit power, DMRS of uplink transmit power, the PRACH of uplink transmit power, the SRS of uplink transmit power, PUCCH to the PUSCH of UE, but this is not absolute, in specific implementation process, the object that can control includes but not limited to the uplink transmit power of above-mentioned channel or signal.

Preferably, eNB can adjust uplink transmit power according to above-mentioned corresponding relation by signaling UE, and wherein signaling comprises one of following: high-level signaling, physical layer signaling.

ENB can notify UE to adjust uplink transmit power according to above-mentioned corresponding relation in several ways, consider the size of change and the difficulty of implementing, preferably can use signaling to notify, the signaling of using can also can be physical layer signaling as high-level signaling.

Preferably, the closed loop power control command in the above-mentioned corresponding relation is the closed loop power control command of 1 bit and/or 2 bits.

Closed loop power control command can be divided into the closed loop power control command of 1 bit and the closed loop power control command of 2 bits, in specific implementation process, can be as the case may be, in above-mentioned corresponding relation, reflect wherein a kind of closed loop power control command and the corresponding relation of power correction value, also can reflect simultaneously the corresponding relation of two kinds of closed loop power control commands and power correction value.

Below in conjunction with example above preferred embodiment is elaborated.

At first the scene of this exemplary application described, comprising:

(1) in distributed multi-antenna system or cooperative multicast system, the receiving node of the up link of UE end and the sending node of down link might be inconsistent, perhaps UE be in the distributed multi-antenna system or the CoMP system that disposes according to 3GPP standard deployment scene 4 in LPN cover lower time, the transmitting power of the PUSCH of subframe i is estimated the smaller value of transmitting power for the maximum on this carrier wave allows transmitting power and PUSCH, and wherein PUSCH's estimates transmitting power by the resource size of the PUSCH on this carrier wave, the target transmit power of UE when not considering on this carrier wave satisfies transmission and require when path loss affects, part path loss penalty coefficient on this carrier wave, the downlink path loss value that UE measures, DeltaTF parameter on this carrier wave and the UE close-loop power control parameter on this carrier wave calculate jointly.

(2) in distributed multi-antenna system or cooperative multicast system, the receiving node of the up link of UE end and the sending node of down link might be inconsistent, perhaps UE be in the distributed multi-antenna system or the CoMP system that disposes according to 3GPP standard deployment scene 4 in LPN cover lower time, the ascending power of the PUCCH of subframe i is estimated the smaller value of transmitting power for the maximum on this carrier wave allows transmitting power and PUCCH, and wherein PUCCH's estimates transmitting power by the resource size of the PUCCH on this carrier wave, the target transmit power of UE when not considering on this carrier wave satisfies transmission and require when path loss affects, the downlink path loss value that UE measures, h (the n relevant with the PUCCH form _CQI, n _HARQ, n _SR) value, the Δ relevant with the PUCCH form _{F_PUCCH}(F) value, whether use emission diversity scheme to launch relevant Δ with PUCCH _TxDUE close-loop power control parameter on (F ') value and this carrier wave calculates jointly.

(3) in distributed multi-antenna system or cooperative multicast system, the receiving node of the up link of UE end and the sending node of down link might be inconsistent, perhaps UE be in the distributed multi-antenna system or the CoMP system that disposes according to 3GPP standard deployment scene 4 in LPN cover lower time, the ascending power of the SRS of subframe i is estimated the smaller value of transmitting power for the maximum on this carrier wave allows transmitting power and SRS, and wherein SRS's estimates transmitting power by the transmitting power biasing P of the SRS on this carrier wave and PUSCH _{SRS_OFFSET, c}The downlink path loss value that the target transmit power of UE, the part path loss penalty coefficient on this carrier wave, UE measured when (m), not considering on the amount of bandwidth of SRS, this carrier wave satisfied transmission and require when path loss affects and the UE close-loop power control parameter on this carrier wave calculate jointly.

The UE that is under the above-mentioned application scenarios estimates that by the measurement of downlink reference signal the path loss of up channel is inaccurate, and this example as shown in Figure 2, comprising for the upward signal power closed-loop control method that this problem provides:

Step S202, the uplink received power of the UE that the base station receives according to each acceptance point, the closed loop power control command definition list of need selecting (i.e. reflection be used for the closed loop power control command of distributing antenna system and CoMP system and power correction value corresponding relation form or reflect the form of the corresponding relation of original general closed loop power control command and power correction value);

Step S204, the base station is by the closed loop power control command definition list of its selection of signaling UE;

Step S206, the base station sends closed loop power control command to UE;

After step S208, UE receive the closed loop power control command of base station transmission, find out the specific definition of the closed loop power control command of base station indication;

Step S210, UE adjusts uplink transmit power according to closed loop power control command.

By above-mentioned steps as can be known, adopt in this example the form reflection of form (closed loop power control command definition list) to be used for distributing antenna system and the closed loop power control command of CoMP system and the corresponding relation of power correction value.

Further set forth below in conjunction with instantiation:

Example one:

As shown in Figure 3, two users are arranged in a Serving cell, be designated as respectively UE1 and UE2.Wherein, the downlink path loss of UE1 distance service residential quarter eNB is designated as DL PL_1, and the downlink path loss of UE2 distance service cell base station is designated as DL PL_2.Two nearest LPN of user of distance are designated as respectively LPN1, LPN2.LPN1 is designated as UL PL1 to the uplink pathloss of UE1, and LPN2 is designated as UL PL2 to the uplink pathloss of UE2.

The up link node of UE1 is LPN1, and downlink node is service cell eNB, and the up link node of UE2 is LPN2, and downlink node is service cell eNB.

The path loss DL PL_1 of down link and DL PL_2 are much larger than path loss UL PL1 and the UL PL2 of the up channel of reality.

The SRS power of the UE that eNB receives according to each receiving node selects UE to use the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna by implementation algorithm, and notice UE.

Current UE will send PUSCH, and closed loop accumulation power control enables, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 1:

Table 1

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", current PUSCH transmitting power is reduced 6dB.

Or

Current UE will send PUCCH, and the control of closed loop cumulative power enables, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 2:

Table 2

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", current PUCCH transmitting power is reduced 9dB.

Or

Current UE only sends PUSCH, and closed loop accumulation power control does not enable, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 3:

Table 3

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", with current PUSCH transmitting power calculating formula:

$P_{\mathrm{PUSCH},c}\left(i\right)=\min \left\{\begin{array}{c}{P}_{\mathrm{CMAX},c}\left(i\right),\\ 10{\log }_{10}\left(M_{\mathrm{PUSCH},c}\left(i\right)\right)+P_{O\_\mathrm{PUSCH},c}\left(j\right)+{\mathrm{\α}}_c\left(j\right)\·{\mathrm{PL}}_c+{\mathrm{\Δ}}_{\mathrm{TF},c}\left(i\right)+f_c\left(i\right)\end{array}\right\}$

In f _c(i) directly be set as-use following formula to calculate the transmitting power of PUSCH behind the 16dB.

Or

Current UE need to send PUCCH, and closed loop accumulation power control does not enable, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 4:

Table 4

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", with current PUSCH transmitting power calculating formula:

$P_{\mathrm{PUCCH}}\left(i\right)=\min \left\{\begin{array}{c}{P}_{\mathrm{CMAX},c}\left(i\right),\\ P_{0\_\mathrm{PUCCH}}+{\mathrm{PL}}_c+h(n_{\mathrm{CQI}},n_{\mathrm{HARQ}},n_{\mathrm{SR}})+{\mathrm{\Δ}}_{F\_\mathrm{PUCCH}}\left(F\right)+{\mathrm{\Δ}}_{\mathrm{TxD}}\left(F^{\′}\right)+g\left(i\right)\end{array}\right\}$

In f _c(i) directly be set as-use following formula to calculate the transmitting power of PUCCH behind the 16dB.

Example two:

As shown in Figure 4, two users are arranged in a Serving cell, be designated as respectively UE1 and UE2.The nearest LPN of two users of its middle distance is designated as respectively LPN1, LPN2.

The transmitting power of LPN is significantly less than the transmitting power of base station in service sector.

The up link node of UE1 and downlink node all are LPN1, and the up link node of UE2 and downlink node all are LPN2.

The SRS power of the UE that eNB receives according to each receiving node selects UE to use the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna by implementation algorithm, and notice UE.

Current UE will send PUSCH, and closed loop accumulation power control enables, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 5:

Table 5

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", current PUSCH transmitting power is reduced 6dB.

Or

Current UE will send PUCCH, and the control of closed loop cumulative power enables, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 6:

Table 6

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", current PUCCH transmitting power is reduced 9dB.

Or

Current UE only sends PUSCH, and closed loop accumulation power control does not enable, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 7:

Table 7

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", with current PUSCH transmitting power calculating formula:

$P_{\mathrm{PUSCH},c}\left(i\right)=\min \left\{\begin{array}{c}{P}_{\mathrm{CMAX},c}\left(i\right),\\ 10{\log }_{10}\left(M_{\mathrm{PUSCH},c}\left(i\right)\right)+P_{O\_\mathrm{PUSCH},c}\left(j\right)+{\mathrm{\α}}_c\left(j\right)\·{\mathrm{PL}}_c+{\mathrm{\Δ}}_{\mathrm{TF},c}\left(i\right)+f_c\left(i\right)\end{array}\right\}$

In f _c(i) directly be set as-use following formula to calculate the transmitting power of PUSCH behind the 16dB.

Or

Current UE need to send PUCCH, and closed loop accumulation power control does not enable, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 8:

Table 8

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", with current PUSCH transmitting power calculating formula:

$P_{\mathrm{PUCCH}}\left(i\right)=\min \left\{\begin{array}{c}{P}_{\mathrm{CMAX},c}\left(i\right),\\ P_{0\_\mathrm{PUCCH}}+{\mathrm{PL}}_c+h(n_{\mathrm{CQI}},n_{\mathrm{HARQ}},n_{\mathrm{SR}})+{\mathrm{\Δ}}_{F\_\mathrm{PUCCH}}\left(F\right)+{\mathrm{\Δ}}_{\mathrm{TxD}}\left(F^{\′}\right)+g\left(i\right)\end{array}\right\}$

In f _c(i) directly be set as-use following formula to calculate the transmitting power of PUCCH behind the 16dB.

Example three:

As shown in Figure 5, two users are arranged in a Serving cell, be designated as respectively UE1 and UE2.The nearest LPN of two users of its middle distance is designated as respectively LPN1, LPN2.LPN1 is designated as UL PL1 to the uplink pathloss of UE1, and LPN2 is designated as UL PL2 to the uplink pathloss of UE2.

The transmitting power of LPN is significantly less than the transmitting power of base station in service sector.

The up link node of UE1 is LPN1 and service cell eNB, and downlink node all is LPN1; The up link node of UE2 is LPN2 and service cell eNB, and downlink node all is LPN2.

The SRS power of the UE that eNB receives according to each receiving node selects UE to use the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna by implementation algorithm, and notice UE.

Current UE will send PUSCH, and closed loop accumulation power control enables, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 9:

Table 9

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", current PUSCH transmitting power is reduced 6dB.

Or

Current UE will send PUCCH, and the control of closed loop cumulative power enables, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 10:

Table 10

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", current PUCCH transmitting power is reduced 9dB.

Or

Current UE only sends PUSCH, and closed loop accumulation power control does not enable, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 11:

Table 11

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", with current PUSCH transmitting power calculating formula:

$P_{\mathrm{PUSCH},c}\left(i\right)=\min \left\{\begin{array}{c}{P}_{\mathrm{CMAX},c}\left(i\right),\\ 10{\log }_{10}\left(M_{\mathrm{PUSCH},c}\left(i\right)\right)+P_{O\_\mathrm{PUSCH},c}\left(j\right)+{\mathrm{\α}}_c\left(j\right)\·{\mathrm{PL}}_c+{\mathrm{\Δ}}_{\mathrm{TF},c}\left(i\right)+f_c\left(i\right)\end{array}\right\}$

In f _c(i) directly be set as-use following formula to calculate the transmitting power of PUSCH behind the 16dB.

Or

Current UE need to send PUCCH, and closed loop accumulation power control does not enable, and 0 during eNB transmission closed loop power control command " 00 " is namely shown given UE.

The new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna that eNB selects is as shown in table 12:

Table 12

Then UE according in the new definition tables that is exclusively used in the closed loop power control command under CoMP and the spaced antenna to the definition of closed loop power control command " 00 ", with current PUSCH transmitting power calculating formula:

$P_{\mathrm{PUCCH}}\left(i\right)=\min \left\{\begin{array}{c}{P}_{\mathrm{CMAX},c}\left(i\right),\\ P_{0\_\mathrm{PUCCH}}+{\mathrm{PL}}_c+h(n_{\mathrm{CQI}},n_{\mathrm{HARQ}},n_{\mathrm{SR}})+{\mathrm{\Δ}}_{F\_\mathrm{PUCCH}}\left(F\right)+{\mathrm{\Δ}}_{\mathrm{TxD}}\left(F^{\′}\right)+g\left(i\right)\end{array}\right\}$

In f _c(i) directly be set as-use following formula to calculate the transmitting power of PUCCH behind the 16dB.

Fig. 6 is the structured flowchart according to the upward signal output control device of the embodiment of the invention.As shown in Figure 6, the upward signal output control device according to the embodiment of the invention comprises:

Use judge module 62, for the signal of the UE that receives according to each receiving node of network, judge whether to use for the closed loop power control command of distributing antenna system and CoMP system and the corresponding relation control UE of power correction value and carry out the uplink transmit power adjustment;

The first control module 64 is connected to and uses judge module 62, is used in the judged result of using judge module 62 when being, notice UE is according to above-mentioned corresponding relation adjustment uplink transmit power.

The device that present embodiment provides makes eNB can notify when needed UE to adjust the uplink transmit power of UE according to power variation corresponding to the closed-loop control order that defines in the corresponding relation that is exclusively used in closed loop power control command and power correction value under CoMP and the spaced antenna, thereby effectively strengthened the ability of close-loop power control, made its effectively error of compensating for path loss estimation.

Preferably, the upward signal output control device can also comprise according to the preferred embodiment of the invention:

The second control module, be used for when using judge module the determination result is NO, notice UE adjusts uplink transmit power according to the corresponding relation of general closed loop power control command and power correction value, wherein, the corresponding relation of general closed loop power control command and power correction value comprises one of following: the corresponding relation of closed loop power control command and power correction value in the Rel-10 version LTE standard, the corresponding relation of closed loop power control command and power correction value in the Rel-9 version LTE standard, the corresponding relation of closed loop power control command and power correction value in the Rel-8 version LTE standard.

Whether use newly-built need to adjusting according to actual conditions for the closed loop power control command under CoMP and the spaced antenna and the corresponding relation of power correction value, when not needing to use newly-built corresponding relation, the corresponding relation of the operable original general closed loop power control command of eNB and power correction value (Rel-10 for example, closed loop power control command in Rel-9 or the Rel-8 version LTE standard and the corresponding relation of power correction value are at Rel-10, above-mentioned corresponding relation is expressed as the closed loop power control command form in Rel-9 or the Rel-8 version LTE standard) control UE carry out the uplink transmit power adjustment.

Preferably, above-mentioned uplink transmit power can comprise following one of at least: the uplink transmit power of the uplink transmit power of PUSCH, the uplink transmit power of PUCCH, SRS, the uplink transmit power of PRACH, the uplink transmit power of DMRS.

Uplink transmit power to UE is controlled, mainly refer to one or more control the in the uplink transmit power of uplink transmit power, DMRS of uplink transmit power, the PRACH of uplink transmit power, the SRS of uplink transmit power, PUCCH to the PUSCH of UE, but this is not absolute, in specific implementation process, the object that can control includes but not limited to the uplink transmit power of above-mentioned channel or signal.

Preferably, the first control module can be used for adjusting uplink transmit power by signaling UE according to above-mentioned corresponding relation, and wherein above-mentioned signaling comprises one of following: high-level signaling, physical layer signaling.

ENB can notify UE to adjust uplink transmit power according to above-mentioned corresponding relation in several ways, consider the size of change and the difficulty of implementing, preferably can use signaling to notify, the signaling of using can also can be physical layer signaling as high-level signaling.

Preferably, the closed loop power control command in the above-mentioned corresponding relation is the closed loop power control command of 1 bit and/or 2 bits.

Closed loop power control command can be divided into the closed loop power control command of 1 bit and the closed loop power control command of 2 bits, in specific implementation process, can be as the case may be, in above-mentioned corresponding relation, reflect wherein a kind of closed loop power control command and the corresponding relation of power correction value, also can reflect simultaneously the corresponding relation of two kinds of closed loop power control commands and power correction value.

From above description, can find out, technical scheme provided by the invention can effectively strengthen the closed power adjustment capability of LTE/LTE-A system, effectively compensate the open loop path loss evaluated error, make UE can reasonably control the transmitting power of upward signal, guarantee the transmission of the upward signal of UE, reduce the loss of UE battery, reduce the interference to other users.

Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a upward signal Poewr control method is characterized in that, comprising:

Set up and be used for distributing antenna system and the closed loop power control command of cooperative multipoint transmission CoMP system and the corresponding relation of power correction value;

The signal of the user equipment (UE) that base station eNB receives according to each receiving node in the network judges whether to use described corresponding relation to control described UE and carries out the uplink transmit power adjustment;

When being, described eNB notifies described UE to adjust uplink transmit power according to described corresponding relation in judged result.

2. method according to claim 1 is characterized in that, base station eNB according to network in the signal of the user equipment (UE) that receives of each receiving node, judge whether to use described corresponding relation to control described UE and carry out also comprising after the uplink transmit power adjustment:

When the determination result is NO, described eNB notifies described UE to adjust uplink transmit power according to the corresponding relation of general closed loop power control command and power correction value, wherein, the corresponding relation of described general closed loop power control command and power correction value comprises one of following: the corresponding relation of closed loop power control command and power correction value in the corresponding relation of closed loop power control command and power correction value, the Rel-8 version LTE standard in the corresponding relation of closed loop power control command and power correction value, the Rel-9 version LTE standard in the Rel-10 version LTE standard.

3. method according to claim 2, it is characterized in that, described uplink transmit power comprise following one of at least: the uplink transmit power of the uplink transmit power of the uplink transmit power of Physical Uplink Shared Channel PUSCH, Physical Uplink Control Channel PUCCH, the uplink transmit power of measuring reference signals SRS, Physical Random Access Channel PRACH, the uplink transmit power of demodulated reference signal DMRS.

4. method according to claim 3 is characterized in that, described eNB adjusts uplink transmit power by the described UE of signaling according to described corresponding relation, and it is one of following that wherein said signaling comprises: high-level signaling, physical layer signaling.

5. according to claim 1 to 4 each described methods, it is characterized in that the closed loop power control command in the described corresponding relation is the closed loop power control command of 1 bit and/or 2 bits.

6. a upward signal output control device is positioned on the base station eNB, it is characterized in that, comprising:

Use judge module, the signal that is used for the user equipment (UE) that receives according to each receiving node of network judges whether to use and controls described UE for the corresponding relation of the closed loop power control command of distributing antenna system and cooperative multipoint transmission CoMP system and power correction value and carry out the uplink transmit power adjustment;

The first control module is used in the judged result of described use judge module notifying described UE according to described corresponding relation adjustment uplink transmit power when being.

7. device according to claim 6 is characterized in that, also comprises:

The second control module, be used at described use judge module when the determination result is NO, notify described UE to adjust uplink transmit power according to the corresponding relation of general closed loop power control command and power correction value, wherein, the corresponding relation of described general closed loop power control command and power correction value comprises one of following: the corresponding relation of closed loop power control command and power correction value in the Rel-10 version LTE standard, the corresponding relation of closed loop power control command and power correction value in the Rel-9 version LTE standard, the corresponding relation of closed loop power control command and power correction value in the Rel-8 version LTE standard.

8. device according to claim 7, it is characterized in that, described uplink transmit power comprise following one of at least: the uplink transmit power of the uplink transmit power of the uplink transmit power of Physical Uplink Shared Channel PUSCH, Physical Uplink Control Channel PUCCH, the uplink transmit power of measuring reference signals SRS, Physical Random Access Channel PRACH, the uplink transmit power of demodulated reference signal DMRS.

9. device according to claim 8 is characterized in that, described the first control module is used for adjusting uplink transmit power by the described UE of signaling according to described corresponding relation, and it is one of following that wherein said signaling comprises: high-level signaling, physical layer signaling.

10. according to claim 6 to 9 each described devices, it is characterized in that the closed loop power control command in the described corresponding relation is the closed loop power control command of 1 bit and/or 2 bits.

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