CN102638894B - Method and equipment for distributing PDSCH (physical downlink shared channel) power - Google Patents

Abstract

The invention discloses a method and equipment for distributing PDSCH (physical downlink shared channel) power. The method comprises the following steps that: base station equipment obtains downlink path loss information corresponding to UE (user equipment); the base station equipment determines a power regulation step corresponding to the downlink path loss information through inquiring the corresponding relation between a path loss threshold interval and the power regulation step; and the base station equipment distributes the current PDSCH transmission power of the UE through the power regulation step and the average transmission power of a downlink PDSCH unit RE (resource element). According to the embodiment of the invention, the equipment can carry out dynamic adjustment on the PDSCH transmission power of the UE, can be used for effectively reducing downlink interference among subzones, promoting the downlink property of edge users, and guaranteeing the downlink fairness of the users.

Description

A kind of method and apparatus of PDSCH power division

Technical field

The present invention relates to communication technical field, relate in particular to a kind of method and apparatus of PDSCH power division.

Background technology

Current agreement specifies to be determined by base station EPRE (the Energy Per Resouse Element of descending transmission, every Resource Unit energy), UE (User Equipment, subscriber equipment) suppose community exclusive RS (Reference Symbol, reference symbol) EPRE in whole downlink system bandwidth He in all subframes, keep constant, until it receives the power information of the exclusive RS in different districts; The EPRE of the exclusive RS in community comes from descending RS through-put power, and is notified by higher level parameters; And RS through-put power be defined as power in all system bandwidths for carrying the linear averaging on the descending RE (Resource Element, Resource Unit) of the exclusive RS in community.

For each OFDM (Orthogonal Frequency Division Multiplexing, OFDM) PDSCH (Physical Downlink Shared Channel on symbol, Physical Downlink Shared Channel) RE in the ratio of PDSCH EPRE (there is no the EPRE of PDSCH Resource Unit using is 0) and the exclusive RS EPRE in community, use the ρ of corresponding OFDM notation index _aor ρ _bdefinition, and ρ _aand ρ _bthat UE is exclusive, as shown in table 1, be 1,2,4 exclusive ratio ρ in antenna port Shi community _b/ ρ _a.

Table 1

In addition be transmission mode 8 for UE, and exclusive RS is not mapped on the corresponding PRB of PDSCH (Physical Resource Block, Physical Resource Block); Or, UE is transmission mode 1-7, UE is assumed to be the spatial reuse of 16QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation), 64QAM and RI (Rank Indication, order instruction) > 1; Or, the PDSCH transmission mode of MU (multi-user)-MIMO (Multiple Input Multiple Output, multiple-input and multiple-output); In the time that UE receives the precoding PDSCH data that use the 4 exclusive antenna port transmission diversities in community, ρ _aequal δ _power-offset+ P _a+ 101og ₁₀(2) [dB]; And ρ in other cases, _aequal δ _power-offset+ P _a[dB].

Further, for other transmission modes except descending MU-MIMO, δ _power-offsetfor 0dB, in the time of descending MU-MIMO, δ _power-offsetvalue as shown in table 2, it is in DCI (Downlink Control Information, Downlink Control Information) format (form) 1D, descending power offset domain and δ _power-offsetthe mapping relations of value; P _afor the exclusive parameter of UE being configured by high-level signaling, concrete value is-6dB ,-4.77dB ,-3dB ,-1.77dB, 0dB, 1dB, 2dB, 3dB etc.

Table 1

Downlink power offset field	δ power-offset[dB]
		0	-10logl0(2)
1	0

In prior art, for LTE (Long Term Evolution, Long Term Evolution) system, descending power distributes need to accept quality as prerequisite to meet user, reduces the transmitting power of down channel, to alleviate the interference between community as far as possible; And in the descending PDSCH power division process of current realization, be to divide equally the maximum transmission power of base station equipment for the resource linearity of carrying PDSCH data in all system bandwidths, and the down transmitting power of each RE equate and fixing.

Realizing in process of the present invention, inventor finds at least to exist in prior art following problem:

Existing descending PDSCH power division is that each RE linearity is divided equally the maximum transmission power of base station equipment, can not dynamically adjust according to the variation of the systematic function in practical application scene or user situation, cannot better realize the object that reduces descending interference between community.

Summary of the invention

The embodiment of the present invention provides a kind of method and apparatus of PDSCH power division, with reasonable distribution PDSCH transmitting power, reduces the descending interference between community.

In order to achieve the above object, the embodiment of the present invention provides a kind of method of Physical Downlink Shared Channel PDSCH power division, comprising:

Base station equipment obtains downlink path loss information corresponding to subscriber equipment;

Described base station equipment is adjusted the corresponding relation between step-length by query path loss thresholding interval and power, determines the power adjustment step-length that described downlink path loss information is corresponding;

Described base station equipment is adjusted step-length and descending PDSCH unit resource unit R E average transmit power by described power, distributes the current PDSCH transmitting power of described subscriber equipment.

The embodiment of the present invention provides a kind of base station equipment, comprising:

Obtain module, for obtaining the downlink path loss information that subscriber equipment is corresponding;

Determination module, adjusts the corresponding relation between step-length for and power interval by query path loss thresholding, determines the power adjustment step-length that described downlink path loss information is corresponding;

Distribution module, for adjust the average transmit power of step-length and descending PDSCH unit resource unit R E by described power, distributes the current PDSCH transmitting power of described subscriber equipment.

Compared with prior art, the embodiment of the present invention at least has the following advantages: in the embodiment of the present invention, can dynamically adjust the PDSCH transmitting power of UE according to different path loss thresholdings, thereby reasonably distribute PDSCH transmitting power, can effectively reduce the descending interference between community, promote the descending performance of edge customer, and ensure the fairness that user is descending.

Brief description of the drawings

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

Fig. 1 is the method flow schematic diagram of a kind of PDSCH power division of providing of the embodiment of the present invention one;

Fig. 2 is the structural representation of a kind of base station equipment of providing of the embodiment of the present invention two.

Embodiment

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

Embodiment mono-

The embodiment of the present invention one provides a kind of method of PDSCH power division, PDSCH transmitting power is dynamically adjusted in downlink path loss (PL) based on UE, thereby reasonably distribute PDSCH transmitting power, effectively reduce the descending interference between community, as shown in Figure 1, the method comprises the following steps:

Step 101, base station equipment obtains downlink path loss information corresponding to UE.

In the embodiment of the present invention, base station equipment can periodically obtain the downlink path loss information that UE is corresponding, and the process that obtains the downlink path loss information that UE is corresponding, specifically comprises: base station equipment is calculated downlink path loss information PL corresponding to UE by following formula _{avr_n}:

PL _{avr_n}＝γ·PL _n+(1-γ)·PL _{avr_n-1}

Wherein, PL _{avr_n-1}be (n-1) inferior downlink path loss after level and smooth, PL _{avr_n}be the n time downlink path loss after level and smooth, PL _nbe the downlink path loss of the n time, γ is smoothing factor, and this smoothing factor can arrange according to practical experience value.

In the embodiment of the present invention, downlink path loss PL _nacquisition pattern specifically include but not limited to: RSRP (Reference Signal Received Power, reference symbol received power) that base station equipment reports by UE calculates downlink path loss PL _n; Or the PHR (Power Headroom Reporting, power headroom reporting) that base station equipment reports by UE calculates downlink path loss PL _n; Or base station equipment obtains downlink path loss PL by the SRS (Sounding Reference Signal, monitoring reference signal) that measures UE _n; Further, the cycle that obtains the downlink path loss information that UE is corresponding can be relevant with RSRP report cycle, or relevant with PHR report cycle, or relevant with the SRS transmission cycle.

The RSRP that mode one, base station equipment report by UE calculates downlink path loss PL _n.

Under which, the difference of the RSRP that base station equipment can report by reference to transmitting power reference-signal EPRE and the UE of symbol is determined downlink path loss, and base station equipment is specifically calculated downlink path loss PL by following formula _n: PL _n=P _cRS-RSRP+Gain _antenna; Wherein, P _cRSfor the transmitting power of reference symbol, concrete value refers to the configuration of referenceSignalPower in 36.331, and RSRP is the RSRP that UE reports, Gain _antennafor antenna gain.

The PHR that mode two, base station equipment report by UE calculates downlink path loss PL _n.

Under which, by following formula, UE can calculate by descending PL the transmitting power of PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel); Concrete, this transmitting power P _tX=10log ₁₀(M _pUSCH(i))+P _{o_PUSCH}(j)+α (j) PL+ Δ _tF(i)+f (i).

Further, the PHR that base station equipment can report by UE obtains the transmitting power of UE, that is: PH (i)=P _cMAX-P _tX=P _cMAX-{ 10log ₁₀(M _pUSCH(i))+P _{o_PUSCH}(j)+α (j) PL+ Δ _tF(i)+f (i) } it should be noted that due to P _cMAX, M _pUSCH(i), P _{o_PUSCH}(j), Δ _tF(i), f (i), α (j) etc. are the set parameter of base station equipment, base station equipment can directly obtain above-mentioned parameter; Therefore, the PHR reporting by UE, base station equipment can calculate downlink path loss PL by following formula _n:

${\mathrm{PL}}_n=\frac{P_{\mathrm{CMAX}}-\mathrm{PH}\left(i\right)-\{10{\log }_{10}\left(M_{\mathrm{PUSCH}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+{\mathrm{\Δ}}_{\mathrm{TF}}\left(i\right)+f\left(i\right)\}}{\mathrm{\α}\left(j\right)}+{\mathrm{Gain}}_{\mathrm{antenna}}$

In above-mentioned formula, P _cMAXfor maximum transmission power, the PH (Power Headroom, power headroom) that PH (i) reports in PHR process for UE, M _pUSCH(i) be the Physical Resource Block PRB number of subframe i, P _{o_PUSCH}(j) be PUSCH expectation received power, Δ _tF(i) be the relevant adjustment amount of transformat, f (i) is closed power adjustment order, and α (j) is path loss penalty coefficient, Gain _antennafor antenna gain.

Mode three, base station equipment obtain downlink path loss PL by measuring the SRS of UE _n.

Under which, base station equipment can obtain up path loss by the SRS that measures UE, if channel reciprocity is stronger, base station equipment can adopt up path loss to replace the mode of downlink path loss to determine downlink path loss; In addition, because the SRS transmitting power of UE is: P _sRS(i)=min{P _cMAX, P _{sRS_OFFSET}+ 10log ₁₀(M _sRS)+P _{o_PUSCH}(j)+α (j) PL+f (i) }

And the PHR that base station equipment obtains is:

PH(i)＝P _CMAX-{10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j)+α(j)·PL+Δ _TF(i)+f(i)}

Therefore, the SRS transmitting power of UE is:

P _SRS(i)＝min{P _CMAX，P _{SRS_OFFSET}+10log ₁₀(M _SRS)+(P _CMAX-PH(i)-{10log ₁₀(M _PUSCH(i))+Δ _TF(i)})+f(i)}

It should be noted that in above-mentioned formula P _cMAXfor maximum transmission power, P _{sRS_OFFSET}for SRS PSD (Power Spectrum Density, power spectral density) PUSCH PSD side-play amount relatively, M _sRSfor SRS distributes bandwidth, the PH that PH (i) reports in PHR process for UE, M _pUSCH(i) be the PRB number of subframe i, Δ _tF(i) be the relevant adjustment amount of transformat, f (i) is closed power adjustment order; And due to P _cMAX, P _{sRS_OFFSET}, M _sRS, PH (i), Δ _tF(i), f (i) etc. is the set parameter of base station equipment, base station equipment can directly obtain; And base station equipment can measure the SRS received power P of UE _{sRS_receive}; Therefore, base station equipment can obtain up path loss, that is: PL by the SRS transmitting power of UE and the difference of received power _uL=P _sRS-P _{sRS_receive}+ Gain _antenna; Further, due to channel reciprocity, think PL _dL=PL _uL=P _sRS-P _{sRS_receive}+ Gain _{ante nna}, base station equipment is calculated downlink path loss PL _nfor: PL _n=P _sRS-P _{sRS_receive}+ Gain _antenna.

In above-mentioned formula, P _{sRS_receive}for SRS received power, Gain _antennafor antenna gain, P _sRSfor SRS transmitting power.

Step 102, base station equipment is adjusted the corresponding relation between step-length by query path loss thresholding interval and power, determines the power adjustment step-length that downlink path loss information is corresponding.

In the embodiment of the present invention, can be in base station equipment pre-configured path loss thresholding interval with power adjustment step-length between corresponding relation; In this situation, base station equipment is adjusted the corresponding relation between step-length by query path loss thresholding interval and power, determine that power adjustment step-length corresponding to downlink path loss information comprises: base station equipment is determined the path loss thresholding interval that downlink path loss information is corresponding, and adjust the corresponding relation between step-length by query path loss thresholding interval and power, determine that it is that power corresponding to downlink path loss information is adjusted step-length that the interval corresponding power of path loss thresholding is adjusted step-length.

For example, in base station equipment, pre-configured path loss is less than the corresponding relation between thresholding 1 and power adjustment step-length A, path loss is adjusted the corresponding relation between step-length B at thresholding 1-thresholding 2 and power, and path loss is greater than thresholding 2 and power is adjusted the corresponding relation between step-length C; In this situation, if the downlink path loss information obtaining between thresholding 1-thresholding 2 time, determines that it is that power is adjusted step-length B that power corresponding to downlink path loss information is adjusted step-length.

In the embodiment of the present invention, can also be in base station equipment corresponding relation between pre-configured path loss thresholding interval and user grouping, and user grouping and power are adjusted the corresponding relation between step-length; In this situation, base station equipment is adjusted the corresponding relation between step-length by query path loss thresholding interval and power, determine that power adjustment step-length corresponding to downlink path loss information comprises: base station equipment is determined the path loss thresholding interval that downlink path loss information is corresponding, and by the corresponding relation between query path loss thresholding interval and user grouping, determine the interval corresponding user grouping of path loss thresholding; And, divide into groups and power is adjusted the corresponding relation between step-length by inquiring user, determine that it is that power corresponding to downlink path loss information is adjusted step-length that the corresponding power of user grouping is adjusted step-length.

For this execution mode, can define N-1 path loss thresholding, it is respectively { thr _{passloss_1}..., thr _{passloss_i}..., thr _{passloss_N}, and thr _{passloss_1}< thr _{passloss_i}< thr _{passloss_N}; According to path loss thresholding, all UE in system are divided into N group, its be respectively Groupl ..., Groupi ..., GroupN}; For the UE in each group, different power adjustment step-length { Δs is set ₁..., Δ _i..., Δ _n; I is the natural number from 1 to N, and known according to high-rise configuration signal, and the adjusting range that power is adjusted step-length can have 8 values, is respectively { 6dB ,-4.77dB ,-3dB ,-1.77dB, 0dB, 1dB, 2dB, 3dB}.

Be that 3 pairs of these steps are elaborated by N below.

Definition downlink path loss thresholding thr _{passloss_1}and thr _{passloss_2}, and according to downlink path loss thresholding, UE is divided into 3 groups Group1, Group2, Group3, concrete division is as follows: Group1 is that downlink path loss is less than thr _{passloss_1}group; Group2 is that downlink path loss is more than or equal to thr _{passloss_1}and be less than thr _{passloss_2}group; Group3 is that downlink path loss is more than or equal to thr _{passloss_2}group; And for Group1, Group2, Group3 do not define respectively power adjustment step delta on the same group ₁, Δ ₂, Δ ₃.

Suppose that downlink path loss information corresponding to UE obtaining in step 101 is less than thr _{passloss_1}, it is Δ that the corresponding Group1 of UE, and corresponding power adjusts step-length ₁; Suppose that downlink path loss information corresponding to UE obtaining in step 101 is greater than thr _{passloss_1}and be less than thr _{passloss_2}, it is Δ that the corresponding Group2 of UE, and corresponding power adjusts step-length ₂; Suppose that downlink path loss information corresponding to UE obtaining in step 101 is greater than thr _{passloss_2}, it is Δ that the corresponding Group3 of UE, and corresponding power adjusts step-length ₃.

Step 103, base station equipment is adjusted the average transmit power of step-length and the descending RE of PDSCH unit by power, distribute the current PDSCH transmitting power of UE.

In the embodiment of the present invention, base station equipment is adjusted the average transmit power of step-length and the descending RE of PDSCH unit by power, distribute the current PDSCH transmitting power of UE, comprising: base station equipment distributes the current PDSCH transmitting power of UE to be: average transmit power+power of the descending RE of PDSCH unit is adjusted step-length.

The application scenarios that is 3 by above-mentioned N is below elaborated to this step.

If UE is corresponding Group1, reduce the descending RE of the PDSCH unit transmitting power of this UE, i.e. P _{pDSCH_RE}(n)=P _{pDSCH_RE_AVE}+ Δ ₁; Wherein, P _{pDSCH_RE_AVE}represent that this UE dynamically adjusts the average transmit power of the previous descending RE of PDSCH unit, Δ ₁for power adjusting range, it is negative, and this parameter can remain unchanged after initial configuration.

If UE is corresponding Group2, the descending RE of the PDSCH unit transmitting power of lifting or reduction or this UE that remains unchanged, i.e. P _{pDSCH_RE}(n)=P _{pDSCH_RE_AVE}+ Δ ₂; P _{pDSCH_RE_AVE}represent that this UE dynamically adjusts the average transmit power of the previous descending RE of PDSCH unit, Δ ₂for power adjusting range, according to practical application scene configuration, while needing bring to power, be set to positive number, need to reduce power time, be set to negative, need to remain unchanged time, be set to 0, after this parameter initial configuration, can remain unchanged.

If UE is corresponding Group3, promote the descending RE of the PDSCH unit transmitting power of this UE, i.e. P _{pDSCH_RE}(n)=P _{pDSCH_RE_AVE}+ Δ ₃; Wherein, P _{pDSCH_RE_AVE}represent that this UE dynamically adjusts the average transmit power of the previous descending RE of PDSCH unit, Δ ₃for power adjusting range, it is positive number, and can remain unchanged after this parameter initial configuration.

It should be noted that, in the embodiment of the present invention, path loss thresholding interval and power for configuration are adjusted the corresponding relation between step-length, based on different application scenarioss, base station equipment can also be adjusted step-length to the power of the interval correspondence of path loss thresholding in this corresponding relation and adjust, and utilizes the power after adjusting to adjust step-length for UE distribution PDSCH transmitting power.

Concrete, taking the corresponding relation between configuration path loss thresholding interval, user grouping, power adjustment step-length as example, in actual application, each UE grouping allows according to different application scenarioss, periodically dynamically adjust the power of the transmitting power of the descending RE of PDSCH unit and adjust step delta, wherein, this power adjustment step delta can be Δ ₁, Δ ₂, Δ ₃.

Especially, to the UE in dividing into groups in 2, in conjunction with the variation of concrete application scenarios, can dynamically adjust the power of descending PDSCH and adjust step-length, concrete example is as follows: define a target gate thr, according to downlink path loss thresholding, suggestion span is thr _{passloss_1}< thr < thr _{passloss_2}.

When in the time that the downlink path loss statistical measurements of the UE in 2 that divides into groups is less than target gate thr, reduce the transmitting power of the descending RE of PDSCH unit, i.e. power adjusting range parameter Δ ₂get negative value; When in the time that the downlink path loss statistical measurements of the UE in 2 that divides into groups equals target gate thr, the transmitting power of the descending RE of PDSCH unit remains unchanged, i.e. power adjusting range parameter Δ ₂get 0; When in the time that the downlink path loss statistical measurements of the UE in 2 that divides into groups is greater than target gate thr, improve the transmitting power of the descending RE of PDSCH unit, i.e. power adjusting range parameter Δ ₂get on the occasion of.

In the embodiment of the present invention, pass through technique scheme, after the UE RE of descending PDSCH unit transmitting power after being adjusted, Ke Yu community dedicated reference symbols EPRE compares, draw descending PDSCH power configuration parameter PA and PB that user is special, then configure to UE by RRC (Radio Resource Control, Radio Resource control) reallocation message, finally complete descending PDSCH power division process.

In sum, in the embodiment of the present invention, the downlink path loss information that base station equipment utilization obtains, according to different path loss thresholdings, UE is divided, to not on the same group in the transmitting power of the descending RE of PDSCH unit of UE dynamically adjust, UE down transmitting power and actual scene are matched, better ensure systematic function, and can more effective realization reduce the descending interference in minizone, promote the target of the descending performance of edge customer and the descending fairness of guarantee user.

Embodiment bis-

Based on the inventive concept same with said method, a kind of base station equipment is also provided in the embodiment of the present invention, as shown in Figure 2, this base station equipment comprises:

Obtain module 11, for obtaining the downlink path loss information that subscriber equipment is corresponding;

Determination module 12, adjusts the corresponding relation between step-length for and power interval by query path loss thresholding, determines the power adjustment step-length that described downlink path loss information is corresponding;

Distribution module 13, for adjust the average transmit power of step-length and descending PDSCH unit resource unit R E by described power, distributes the current PDSCH transmitting power of described subscriber equipment.

Described acquisition module 11, specifically for calculating the downlink path loss information PL that described subscriber equipment is corresponding by following formula _{avr_n}:

PL _{avr_n}＝γ·PL _n+(1-γ)·PL _{avr_n-1}

Wherein, PL _{avr_n-1}be (n-1) inferior downlink path loss after level and smooth, PL _{avr_n}be the n time downlink path loss after level and smooth, PL _nbe the downlink path loss of the n time, γ is smoothing factor.

Described acquisition module 11, is further used for obtaining described downlink path loss PL _n, and described downlink path loss PL _nacquisition pattern, be specially: calculate described downlink path loss PL by the reference symbol received power RSRP of described user equipment to report _n; Or, calculate described downlink path loss PL by the power headroom reporting PHR of described user equipment to report _n; Or, obtain described downlink path loss PL by measuring the monitoring reference signal SRS of described subscriber equipment _n.

Described acquisition module 11, is further used for calculating described downlink path loss PL by following formula _n:

PL _n＝P _CRS-RSRP+Gain _antenna

Wherein, P _cRSfor the transmitting power of reference symbol, the RSRP that RSRP is described user equipment to report, and Gain _antennafor antenna gain.

Described acquisition module 11, is further used for calculating described downlink path loss PL by following formula _n:

${\mathrm{PL}}_n=\frac{P_{\mathrm{CMAX}}-\mathrm{PH}\left(i\right)-\{10{\log }_{10}\left(M_{\mathrm{PUSCH}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+{\mathrm{\&Delta;}}_{\mathrm{TF}}\left(i\right)+f\left(i\right)\}}{\mathrm{\&alpha;}\left(j\right)}+{\mathrm{Gain}}_{\mathrm{antenna}}$

Wherein, P _cMAXfor maximum transmission power, the power headroom PH that PH (i) reports in PHR process for described subscriber equipment, M _pUSCH(i) be the Physical Resource Block PRB number of subframe i, P _{o_PUSCH}(j) be Physical Uplink Shared Channel PUSCH expectation received power, Δ _tF(i) be the relevant adjustment amount of transformat, f (i) is closed power adjustment order, and α (j) is path loss penalty coefficient, Gain _antennafor antenna gain.

Described acquisition module 11, is further used for calculating described downlink path loss PL by following formula _n:

PL _n＝P _SRS-P _{SRS_receive}+Gainan _tenna

Wherein, P _{sRS_receive}for SRS received power, Gain _antennafor antenna gain, P _sRSfor SRS transmitting power, and

P _SRS(i)＝min{P _CMAX，P _{SRS_OFFSET}+10log ₁₀(M _SRS)+(P _CMAX-PH(i)-{10log ₁₀(M _PUSCH(i))+Δ _TF(i)})+f(i)}

Wherein, P _cMAXfor maximum transmission power, P _{sRS_OFFSET}for the relative PUSCH PSD of SRS power spectral density PSD side-play amount, M _sRSfor SRS distributes bandwidth, the power headroom PH that PH (i) reports in PHR process for described subscriber equipment, M _pUSCH(i) be the Physical Resource Block PRB number of subframe i, Δ _tF(i) be the relevant adjustment amount of transformat, f (i) is closed power adjustment order.

In described base station equipment, pre-configured path loss thresholding interval and power are adjusted the corresponding relation between step-length; Described determination module 12, specifically for determining path loss thresholding interval corresponding to described downlink path loss information, and adjust the corresponding relation between step-length by inquiry described path loss thresholding interval and power, determine that it is that power corresponding to described downlink path loss information is adjusted step-length that the interval corresponding power of described path loss thresholding is adjusted step-length.

Corresponding relation in described base station equipment between pre-configured path loss thresholding interval and user grouping, and user grouping and power are adjusted the corresponding relation between step-length; Described determination module 12, specifically for determining path loss thresholding interval corresponding to described downlink path loss information, and by the corresponding relation between the described path loss thresholding interval of inquiry and user grouping, determine the interval corresponding user grouping of described path loss thresholding; And, adjust the corresponding relation between step-length by inquiring about described user grouping and power, determine that it is that power corresponding to described downlink path loss information is adjusted step-length that the corresponding power of described user grouping is adjusted step-length.

Described distribution module 12, specifically for distributing the current PDSCH transmitting power of described subscriber equipment to be: average transmit power+described power of the descending RE of PDSCH unit is adjusted step-length.

In the embodiment of the present invention, this base station equipment also comprises: adjusting module 14, for being adjusted to step-length, the interval corresponding power of described corresponding relation path loss thresholding adjusts, to utilize the power after adjustment to adjust step-length as user equipment allocation PDSCH transmitting power.

Wherein, the modules of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into multiple submodules.

In sum, in the embodiment of the present invention, can dynamically adjust the PDSCH transmitting power of UE according to different path loss thresholdings, thereby reasonably distribute PDSCH transmitting power, can effectively reduce the descending interference between community, promote the descending performance of edge customer, and ensure the fairness that user is descending.

Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.

It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into multiple submodules.

The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.

Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.

Claims (16)

1. a method for Physical Downlink Shared Channel PDSCH power division, is characterized in that, comprising:

Base station equipment obtains downlink path loss information corresponding to subscriber equipment;

Described base station equipment is adjusted the corresponding relation between step-length by query path loss thresholding interval and power, determines the power adjustment step-length that described downlink path loss information is corresponding;

Described base station equipment is adjusted step-length and descending PDSCH unit resource unit R E average transmit power by described power, distributes the current PDSCH transmitting power of described subscriber equipment;

Wherein, described base station equipment obtains downlink path loss information corresponding to subscriber equipment, comprising:

Described base station equipment calculates by following formula the downlink path loss information PL that described subscriber equipment is corresponding _{avr_n}:

PL _{avr_n}＝γ·PL _n+(1-γ)·PL _{avr_n-1}

Wherein, PL _{avr_n-1}be (n-1) inferior downlink path loss after level and smooth, PL _{avr_n}be the n time downlink path loss after level and smooth, PL _nbe the downlink path loss of the n time, γ is smoothing factor;

Wherein, described base station equipment is adjusted step-length and descending PDSCH unit resource unit R E average transmit power by described power, distributes the current PDSCH transmitting power of described subscriber equipment, comprising:

Described base station equipment distributes the current PDSCH transmitting power of described subscriber equipment to be: average transmit power+described power of the descending RE of PDSCH unit is adjusted step-length.

2. the method for claim 1, is characterized in that, described downlink path loss PL _nacquisition pattern, specifically comprise:

Described base station equipment is calculated described downlink path loss PL by the reference symbol received power RSRP of described user equipment to report _n; Or,

Described base station equipment is calculated described downlink path loss PL by the power headroom reporting PHR of described user equipment to report _n; Or,

Described base station equipment obtains described downlink path loss PL by measuring the monitoring reference signal SRS of described subscriber equipment _n.

3. method as claimed in claim 2, is characterized in that, described base station equipment is calculated described downlink path loss PL by the reference symbol received power RSRP of described user equipment to report _n, specifically comprise:

Described base station equipment is calculated described downlink path loss PL by following formula _n:

PL _n＝P _CRS-RSRP+Gain _antenna

Wherein, P _cRSfor the transmitting power of reference symbol, the RSRP that RSRP is described user equipment to report, and Gain _antennafor antenna gain.

4. method as claimed in claim 2, is characterized in that, described base station equipment is calculated described downlink path loss PL by the power headroom reporting PHR of described user equipment to report _n, specifically comprise:

Described base station equipment is calculated described downlink path loss PL by following formula _n:

${\mathrm{PL}}_n=\frac{P_{\mathrm{CMAX}}-\mathrm{PH}\left(i\right)-\{10\mathrm{lo}{g}_{10}\left(M_{\mathrm{PUSCH}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+{\mathrm{\&Delta;}}_{\mathrm{TF}}\left(i\right)+f\left(i\right)\}}{\mathrm{\&alpha;}\left(j\right)}+G{\mathrm{ain}}_{\mathrm{antenna}}$

Wherein, P _cMAXfor maximum transmission power, the power headroom PH that PH (i) reports in PHR process for described subscriber equipment, M _pUSCH(i) be the Physical Resource Block PRB number of subframe i, P _{o_PUSCH}(j) be Physical Uplink Shared Channel PUSCH expectation received power, Δ _tF(i) be the relevant adjustment amount of transformat, f (i) is closed power adjustment order, and α (j) is path loss penalty coefficient, Gain _antennafor antenna gain.

5. method as claimed in claim 2, is characterized in that, described base station equipment obtains described downlink path loss PL by measuring the monitoring reference signal SRS of described subscriber equipment _n, specifically comprise:

Described base station equipment is calculated described downlink path loss PL by following formula _n:

PL _n＝P _SRS-P _{SRS_receive}+Gain _antenna

Wherein, P _{sRS_receive}for SRS received power, Gain _antennafor antenna gain, P _sRSfor SRS transmitting power, and

P _SRS(i)＝min{P _CMAX,P _{SRS_OFFSET}+10log ₁₀(M _SRS)+(P _CMAX-PH(i)-{10log ₁₀(M _PUSCH(i))+Δ _TF(i)})+f(i)}

Wherein, P _cMAXfor maximum transmission power, P _{sRS_OFFSET}for the relative PUSCH PSD of SRS power spectral density PSD side-play amount, M _sRSfor SRS distributes bandwidth, the power headroom PH that PH (i) reports in PHR process for described subscriber equipment, M _pUSCH(i) be the Physical Resource Block PRB number of subframe i, Δ _tF(i) be the relevant adjustment amount of transformat, f (i) is closed power adjustment order.

6. the method for claim 1, is characterized in that, in described base station equipment, pre-configured path loss thresholding interval and power are adjusted the corresponding relation between step-length;

Described base station equipment is adjusted the corresponding relation between step-length by query path loss thresholding interval and power, determines the power adjustment step-length that described downlink path loss information is corresponding, comprising:

Described base station equipment is determined the path loss thresholding interval that described downlink path loss information is corresponding, and adjust the corresponding relation between step-length by inquiry described path loss thresholding interval and power, determine that it is that power corresponding to described downlink path loss information is adjusted step-length that the interval corresponding power of described path loss thresholding is adjusted step-length.

7. the method for claim 1, is characterized in that, the corresponding relation in described base station equipment between pre-configured path loss thresholding interval and user grouping, and user grouping and power are adjusted the corresponding relation between step-length;

Described base station equipment is adjusted the corresponding relation between step-length by query path loss thresholding interval and power, determines the power adjustment step-length that described downlink path loss information is corresponding, comprising:

Described base station equipment is determined the path loss thresholding interval that described downlink path loss information is corresponding, and by the corresponding relation between the described path loss thresholding interval of inquiry and user grouping, determines the interval corresponding user grouping of described path loss thresholding; And, adjust the corresponding relation between step-length by inquiring about described user grouping and power, determine that it is that power corresponding to described downlink path loss information is adjusted step-length that the corresponding power of described user grouping is adjusted step-length.

8. the method for claim 1, is characterized in that, described method further comprises:

Described base station equipment is adjusted step-length to power corresponding to path loss thresholding in described corresponding relation and is adjusted, and to utilize power after adjusting to adjust step-length be user equipment allocation PDSCH transmitting power.

9. a base station equipment, is characterized in that, comprising:

Obtain module, for obtaining the downlink path loss information that subscriber equipment is corresponding;

Determination module, adjusts the corresponding relation between step-length for and power interval by query path loss thresholding, determines the power adjustment step-length that described downlink path loss information is corresponding;

Distribution module, for adjust the average transmit power of step-length and descending PDSCH unit resource unit R E by described power, distributes the current PDSCH transmitting power of described subscriber equipment;

Wherein, described acquisition module, specifically for calculating the downlink path loss information PL that described subscriber equipment is corresponding by following formula _{avr_n}:

PL _{avr_n}＝γ·PL _n+(1-γ)·PL _{avr_n-1}

Wherein, PL _{avr_n-1}be (n-1) inferior downlink path loss after level and smooth, PL _{avr_n}be the n time downlink path loss after level and smooth, PL _nbe the downlink path loss of the n time, γ is smoothing factor;

Wherein, described distribution module, specifically for distributing the current PDSCH transmitting power of described subscriber equipment to be: average transmit power+described power of the descending RE of PDSCH unit is adjusted step-length.

10. base station equipment as claimed in claim 9, is characterized in that,

Described acquisition module, is further used for obtaining described downlink path loss PL _n, and described downlink path loss PL _nacquisition pattern, be specially: calculate described downlink path loss PL by the reference symbol received power RSRP of described user equipment to report _n; Or, calculate described downlink path loss PL by the power headroom reporting PHR of described user equipment to report _n; Or, obtain described downlink path loss PL by measuring the monitoring reference signal SRS of described subscriber equipment _n.

11. base station equipment as claimed in claim 10, is characterized in that,

Described acquisition module, is further used for calculating described downlink path loss PL by following formula _n:

PL _n＝P _CRS-RSRP+Gain _antenna

Wherein, P _cRSfor the transmitting power of reference symbol, the RSRP that RSRP is described user equipment to report, and Gain _antennafor antenna gain.

12. base station equipments as claimed in claim 10, is characterized in that,

Described acquisition module, is further used for calculating described downlink path loss PL by following formula _n:

${\mathrm{PL}}_n=\frac{P_{\mathrm{CMAX}}-\mathrm{PH}\left(i\right)-\{10\mathrm{lo}{g}_{10}\left(M_{\mathrm{PUSCH}}\left(i\right)\right)+P_{O\_\mathrm{PUSCH}}\left(j\right)+{\mathrm{\&Delta;}}_{\mathrm{TF}}\left(i\right)+f\left(i\right)\}}{\mathrm{\&alpha;}\left(j\right)}+G{\mathrm{ain}}_{\mathrm{antenna}}$

Wherein, P _cMAXfor maximum transmission power, the power headroom PH that PH (i) reports in PHR process for described subscriber equipment, M _pUSCH(i) be the Physical Resource Block PRB number of subframe i, P _{o_PUSCH}(j) be Physical Uplink Shared Channel PUSCH expectation received power, Δ _tF(i) be the relevant adjustment amount of transformat, f (i) is closed power adjustment order, and α (j) is path loss penalty coefficient, Gain _antennafor antenna gain.

13. base station equipments as claimed in claim 10, is characterized in that,

Described acquisition module, is further used for calculating described downlink path loss PL by following formula _n:

PL _n＝P _SRS-P _{SRS_receive}+Gain _antenna

Wherein, P _{sRS_receive}for SRS received power, Gain _antennafor antenna gain, P _sRSfor SRS transmitting power, and

P _SRS(i)＝min{P _CMAX,P _{SRS_OFFSET}+10log ₁₀(M _SRS)+(P _CMAX-PH(i)-{10log ₁₀(M _PUSCH(i))+Δ _TF(i)})+f(i)}

Wherein, P _cMAXfor maximum transmission power, P _{sRS_OFFSET}for the relative PUSCH PSD of SRS power spectral density PSD side-play amount, M _sRSfor SRS distributes bandwidth, the power headroom PH that PH (i) reports in PHR process for described subscriber equipment, M _pUSCH(i) be the Physical Resource Block PRB number of subframe i, Δ _tF(i) be the relevant adjustment amount of transformat, f (i) is closed power adjustment order.

14. base station equipments as claimed in claim 9, is characterized in that, in described base station equipment, pre-configured path loss thresholding interval and power are adjusted the corresponding relation between step-length;

Described determination module, specifically for determining path loss thresholding interval corresponding to described downlink path loss information, and adjust the corresponding relation between step-length by inquiry described path loss thresholding interval and power, determine that it is that power corresponding to described downlink path loss information is adjusted step-length that the interval corresponding power of described path loss thresholding is adjusted step-length.

15. base station equipments as claimed in claim 9, is characterized in that, the corresponding relation in described base station equipment between pre-configured path loss thresholding interval and user grouping, and user grouping and power are adjusted the corresponding relation between step-length;

Described determination module, specifically for determining path loss thresholding interval corresponding to described downlink path loss information, and by the corresponding relation between the described path loss thresholding interval of inquiry and user grouping, determine the interval corresponding user grouping of described path loss thresholding; And, adjust the corresponding relation between step-length by inquiring about described user grouping and power, determine that it is that power corresponding to described downlink path loss information is adjusted step-length that the corresponding power of described user grouping is adjusted step-length.

16. base station equipments as claimed in claim 9, is characterized in that, also comprise:

Adjusting module, adjusts for the interval corresponding power of described corresponding relation path loss thresholding is adjusted to step-length, to utilize the power after adjustment to adjust step-length as user equipment allocation PDSCH transmitting power.