CN101640904B - Method and device for distributing bandwidth of uplink sounding reference signal - Google Patents

Abstract

The invention discloses a method for distributing the bandwidth of an uplink sounding reference signal, which comprises the steps of: determining the bandwidth grade of the current sounding reference signal (SRS) according to scheduling bandwidth; determining SRS transmission power margin corresponding to the current SRS bandwidth grade; utilizing the SRS transmission power margin to judge whether the bandwidth corresponding to the current bandwidth grade is power limited; if so, reducing one bandwidth grade to re-determine the SRS transmission power margin; otherwise, distributing the bandwidth corresponding to the current bandwidth grade for a user terminal. The embodiment of the invention also provides a device for distributing the bandwidth of the uplink sounding reference signal. The adoption of the method and the device can ensure that the distribution of SRS bandwidth is more reasonable, can improve the accuracy of the sounding of user channels, and further promote the scheduling performance of the whole system.

Description

The method and the device that distribute bandwidth of uplink sounding reference signal

Technical field

The present invention relates to the mobile communication technology field, relate in particular to a kind of method and device that distributes bandwidth of uplink sounding reference signal.

Background technology

For existing LTE system, the transmission to uplink SRS (Sounding ReferenceSignal, detection reference signal) limits the topmost regulation that sends bandwidth that relates to distribute in the standard at present:

Wherein, the bandwidth that sends the SRS signal is distributed for each user in the regulation base station, and this bandwidth is divided into multiple grade; Concrete, four kinds of different bandwidth class are arranged, by every user being distributed and by RRC signaling user the base station under every kind of band width configuration.

And the factor that need consider for the distribution of SRS bandwidth at present comprises: UE scheduling bandwidth and terminal power be factor at first: wherein,

The UE scheduling bandwidth, be that a certain UE need dispatch in much frequency band ranges, if only consider this factor, then optimal SRS allocated bandwidth should be the scheduling bandwidth that equals UE, for example, if certain UE is done scheduling in the whole system bandwidth, need SRS to send so according to the bandwidth class of maximum; Therefore and a critical function of SRS signal is supported frequency domain dispatching exactly, if user's scheduling bandwidth is W, equals W in the transmission bandwidth of SRS the most ideally so, can measure the channel quality in the whole scheduling bandwidth so fast.

The terminal power limited resource, if be that the relatively poor user of channel circumstance distributes big SRS bandwidth only according to above-mentioned scheduling bandwidth, accurate measured channel information influences the scheduling performance of whole system, also will consider the factor that terminal power is limited during therefore for UE distribution SRS bandwidth; But at present whether the SRS that launches a certain bandwidth class for terminal can reach power limited, does not also have good determination methods at present.

Summary of the invention

In view of this, the embodiment of the invention provides a kind of method and device that distributes bandwidth of uplink sounding reference signal, can make the distribution of SRS bandwidth more reasonable, improves the accuracy that subscriber channel is surveyed, and then promotes the scheduling performance of whole system.

For addressing the above problem, the technical scheme that the embodiment of the invention provides is as follows:

A kind of method of distributing bandwidth of uplink sounding reference signal may further comprise the steps:

Determine current detection reference signal SRS bandwidth class according to scheduling bandwidth;

Determine the SRS transmitting power allowance of current SRS bandwidth class correspondence;

Utilize whether power limited of bandwidth that described SRS transmitting power allowance judges current bandwidth grade correspondence; If the bandwidth class that then descends redefines SRS transmitting power allowance; Otherwise, be the bandwidth of user terminal distribution current bandwidth grade correspondence.

A kind of device that distributes bandwidth of uplink sounding reference signal comprises: first processing unit, second processing unit and judgement allocation units; Wherein,

Described first processing unit is used for: determine current detection reference signal SRS bandwidth class according to scheduling bandwidth;

Described second processing unit is used for: the current SRS bandwidth class that utilizes described first processing unit to determine calculates the SRS transmitting power allowance of current SRS bandwidth class correspondence;

Describedly judge that allocation units are used for: whether the bandwidth that the SRS transmitting power allowance of utilizing described second processing unit to calculate is judged current bandwidth grade correspondence power limited; If then notify described first processing unit decline bandwidth class, and indicate the new bandwidth class of the described second processing unit utilization to redefine SRS transmitting power allowance; Otherwise, be the bandwidth of user terminal distribution current bandwidth grade correspondence.

As can be seen, adopt the method and apparatus of the embodiment of the invention, utilize known parameter to determine SRS signal transmission power allowance, and this margin of power and default threshold value compared, whether the bandwidth that can determine current SRS bandwidth class correspondence causes power limited, and will can not cause the allocated bandwidth of the current bandwidth grade correspondence of power limited to be used to send the SRS signal to the user, can make that so the distribution of SRS bandwidth is more reasonable, and can improve the accuracy that subscriber channel is surveyed, and then promote the scheduling performance of whole system.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the method flow schematic diagram of the embodiment of the invention 1;

Fig. 2 is the apparatus structure schematic diagram of the embodiment of the invention 2.

Embodiment

The basic thought of the embodiment of the invention is to utilize known parameter to determine the allowance of SRS signal transmission power, and this margin of power and default threshold value compared, can determine whether current SRS bandwidth class causes power limited, thereby make that the distribution of SRS bandwidth is more reasonable, can improve the accuracy that subscriber channel is surveyed, and then promote the scheduling performance of whole system.

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described; Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

The embodiment of the invention 1 provides a kind of method of distributing bandwidth of uplink sounding reference signal, and as shown in Figure 1, this method comprises:

Step 101: determine current SRS bandwidth class according to scheduling bandwidth;

Wherein, the most ideally the bandwidth of the bandwidth class correspondence of distributing for SRS be the scheduling bandwidth that equals UE, if promptly certain UE is done scheduling in the whole system bandwidth, then needs to make SRS to send according to the grade bandwidth of maximum; For example:, then determine tentatively that according to scheduling bandwidth the method for the bandwidth of current SRS bandwidth class correspondence is M if scheduling bandwidth is W0 _SRS=W0, wherein M _SRSBe the bandwidth of current SRS bandwidth class correspondence, N _RB ^ULBe the up-link bandwidth, obviously M _SRSCan not surpass system bandwidth; Certainly, those skilled in the art understand, and can have multiple mode to determine current SRS bandwidth class according to scheduling bandwidth, and present embodiment repeats no more;

Concrete, shown in following table 1-4; This bandwidth is divided into multiple grade, and the corresponding maximum SRS bandwidth class of b=0 wherein is as long as determined that bandwidth class can be according to the bandwidth of determining these grades correspondence unique shown in the following table; N _RB ^ULThe different brackets (unit is the RB number) of expression up-link bandwidth, being divided into is four grades, the corresponding SRS bandwidth form of each grade; And under every kind of band width configuration four kinds of different bandwidth class are arranged, by every user being distributed and by RRC signaling user the base station; m _{SRS, b}Represent the concrete bandwidth value of certain bandwidth class under certain band width configuration, unit is the RB number; Wherein, in each table 8 kinds of different cell-level SRS band width configuration are arranged, it can notify the user by Cell Broadcast CB;

Table 1 m _{SRS, b}And N _bValues for the uplink bandwidth of $6\≤N_{\mathrm{RB}}^{\mathrm{UL}}\≤40$

Table 2 m _{SRS, b}And N _bValues for the uplink bandwidth of $40{<N}_{\mathrm{RB}}^{\mathrm{UL}}\&le;60$

Table 3 m _{SRS, b}And N _bValues for the uplink bandwidth of $60{<N}_{\mathrm{RB}}^{\mathrm{UL}}\&le;80$

Table 4 m _{SRS, b}And N _bValues for the uplink bandwidth of $80<N_{\mathrm{RB}}^{\mathrm{UL}}\&le;110$

Utilize above table, can tentatively determine the bandwidth class of current SRS according to the demand of the scheduling bandwidth of UE, concrete adopt other modes of the prior art, this paper repeats no more.

Step 102: the SRS transmitting power allowance of determining current SRS bandwidth class correspondence;

Concrete, can adopt dual mode to determine margin of power in the present embodiment:

1), at first obtain active user's terminal sends the SRS signal in subframe power, and the maximum of current UE grade correspondence allows transmitting power P _MAXWith the power P that sends the SRS signal in the subframe i _SRS(i) difference is described SRS transmitting power allowance PH _{SRS_M}(i); Promptly

PH _{SRS_M}(i)=P _MAX-P _SRS(i) (formula 1)

Wherein, UE sends the power P of SRS signal in subframe i _SRSCalculate by following formula:

P _SRS(i)=min{P _MAX, P _{SRS_OFFSET}+ 10log ₁₀(M _SRS)+P _{O_PUSCH}(j)+α PL+f (i) } (formula 2)

Wherein, P _MAXIt is maximum permission transmitting power by the decision of UE grade; P _{SRS_OFFSET}Be the exclusive parameter of UE of the 4bits of high-rise semi-static configuration, Ks is a parameter of high-rise configuration:

Zero works as K _S=1.25 o'clock, P _{SRS_OFFSET}Dynamic range be [3,12], granularity is 1dB;

Zero works as K _S=0 o'clock, P _{SRS_OFFSET}Dynamic range be [10.5,12] dB, granularity is 1.5dB; And M _SRSBe the bandwidth of current SRS bandwidth class correspondence in the subframe i, unit is the RB number, promptly shows each m in the 1-table 4 _{SRS, b}Value; F (i) is the exclusive correction value of UE, be also referred to as the TPC order, it is contained among the PDDCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) with DCI form 0, or be contained among the PDCCH of DCI form 3/3A and with other TPC order combined codings; P _{O_PUSCH}(j) be PUSCH received power desired value, it is by the sub-district of 8bit exclusive normalization part P _{O_NOMINAL_PUSCH}(j) and the exclusive part P of the UE of 4bit _{O_UE_PUSCH}(j) sum is formed; Wherein, P _{O_NOMINAL_PUSCH}(j) by high level notice (j=0 and 1), and its dynamic range is [126,24] dBm, and granularity is 1dB; P _{O_UE_PUSCH}(j) by RRC (Radio Link control) configuration, (j=0 and 1), its dynamic range is [8,7] dB, granularity is 1dB; If PUSCH transmission/re-transmission is corresponding to the scheduling grant that has disposed, j=0 so; If PUSCH transmission/re-transmission is corresponding to the PDCCH of a DCI form 0 that receives, it comprises the scheduling grant of new bag transmission, j=1 so.{ 0,0.4,0.5,0.6,0.7,0.8,0.9,1} is the path loss compensating factor to α ∈, for the exclusive parameter in sub-district, is indicated by 3bit by high-level signaling; PL is the downlink path loss that UE measures;

Allow transmitting power P as long as therefore determined the maximum of current UE grade correspondence _MAX, and according to the power P that sends the SRS signal in the subframe i that obtains _SRS(i) can determine the SRS transmitting power allowance of current SRS bandwidth class correspondence according to the difference of the two;

2), the transmitting power in the subframe i between SRS and the PUSCH is poor, can be expressed as:

Delta_SRS_PUSCH(i)＝P _SRS(i)-P _PUSCH(i)＝P _{SRS_OFFSET}+10log ₁₀(M _SRS)-10log ₁₀(M _PUSCH(i))-Δ _TF(i)

Therefore can't realize or realize more at need that when aforesaid way sending bandwidth in the subframe i is M _SRSThe SRS signal time margin of power can be expressed as:

PH _{SRS_M}(i)＝P _MAX-P _SRS(i)

＝P _MAX-(Delta_SRS_PUSCH(i)+P _PUSCH(i))

=PH (i)-(P _{SRS_OFFSET}+ 10log ₁₀(M _SRS)-10log ₁₀(M _PUSCH(i))-Δ _TF(i)) (formula 3)

(1), wherein, P _PUSCHFor UE sends the power of PUSCH in subframe i, but according to present standard its by following formula setting:

P _PUSCH(i)=min{P _MAX, 10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j) α PL+ Δ _TF(i)+f (i) } (formula 4)

Wherein, P _MAXIt is maximum permission transmitting power by the decision of UE grade; M _PUSCH(i) be the resource size that comes into force in the i subframe, represent with Resource Block (RB) number for the PUSCH distribution; P _{O_PUSCH}(j) identical in implication and the formula 2; { 0,0.4,0.5,0.6,0.7,0.8,0.9,1} is the path loss compensating factor to α ∈, for the exclusive parameter in sub-district, is indicated by 3bit by high-level signaling; PL is the downlink path loss that UE measures; K _sImplication and formula 2 in identical:

Work as K _S=1.25 o'clock, ${\mathrm{\&Delta;}}_{\mathrm{TF}}\left(i\right)=10{\log }_{10}(2^{\mathrm{MPR}\left(i\right){\&CenterDot;K}_S}-1);$

Work as K _S=0 o'clock, Δ _TF(i)=0;

Identical in the implication of f (i) and the formula 2.

(2), PH (i) is the margin of power of terminal when sending PUSCH in subframe i, can calculate by formula down according to present standard:

PH (i)=P _MAX-{ 10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j)+α PL+ Δ _TF(i)+f (i) } (formula 5)

P wherein _MAX, M _PUSCH(i), P _{O_PUSCH}(j), α, PL, Δ _TF(i) implication with f (i) is identical with formula 4; And it is granularity with 1dB that this margin of power quantizes interior in [40 ,-23] dB scope, and reports high level by terminal physical layer, and finally sends to the base station.

Therefore, as long as know SRS bandwidth M _SRS, and margin of power PH (i) and the known PUSCH resource allocation size M in base station when sending PUSCH among the subframe i that reports according to UE _PUSCH(i) and the transformat Δ _TF(i) get final product to such an extent that SRS transmission bandwidth is M _SRSThe time margin of power P _{HSRS_M}(i).

Step 103: utilize whether power limited of bandwidth that described SRS transmitting power allowance judges current bandwidth grade correspondence; If then return the bandwidth class that descends and redefine SRS transmitting power allowance; Otherwise, be the bandwidth of user terminal distribution current bandwidth grade correspondence.

Concrete, calculating SRS transmitting power allowance PH _{SRS_M}(i) after, UE utilized bandwidth M this moment can be judged according to the mode of setting limited thresholding in the base station _SRSWhether emission SRS signal can cause power limited, and it is a preferred mode that certain ability and technical staff understand this mode, is not limited thereto; Specific practice is as follows:

Set in advance threshold value B eta, if SRS transmitting power allowance PH _{SRS_M}(i)≤and Beta, determine that then UE possibility emergent power is limited at this moment, and use the bandwidth M of current bandwidth grade correspondence _SRSSend the SRS signal and have the power limited risk, recomputate the current bandwidth grade rank that descends to determine SRS transmitting power allowance this moment, up to SRS transmitting power allowance greater than described threshold value B eta; And, show the bandwidth M that uses current bandwidth grade correspondence when SRS transmitting power allowance during greater than described threshold value B eta _SRSSend the SRS signal and do not have the power limited risk, therefore launch the SRS signal for the user distributes the bandwidth of current bandwidth grade correspondence to be used for the user;

It should be noted that described default threshold value B eta can determine according to simulation study and actual system's service data, repeats no more herein.

As can be seen, adopt the method for the embodiment of the invention, utilize known parameter to determine SRS signal transmission power allowance, and this margin of power and default threshold value compared, whether the bandwidth that can determine current SRS bandwidth class correspondence causes power limited, and will can not cause the allocated bandwidth of the current bandwidth grade correspondence of power limited correspondence to be used to send the SRS signal to the user, can make that so the distribution of SRS bandwidth is more reasonable, and can improve the accuracy that subscriber channel is surveyed, and then promote the scheduling performance of whole system.

Based on above-mentioned thought, the embodiment of the invention 2 has proposed a kind of device that distributes bandwidth of uplink sounding reference signal again, as shown in Figure 2, comprising: first processing unit 201, second processing unit 202 and judgement allocation units 203; Wherein,

Described first processing unit 201 is used for: determine current detection reference signal SRS bandwidth class according to scheduling bandwidth;

Described second processing unit 202 is used for: the current SRS bandwidth class that utilizes described first processing unit 201 to determine calculates the SRS transmitting power allowance of current SRS bandwidth class correspondence;

Describedly judge that allocation units 203 are used for: whether the bandwidth that the SRS transmitting power allowance of utilizing described second processing unit 202 to calculate is judged current bandwidth grade correspondence power limited; If then notify described first processing unit, 201 declines a bandwidth class, and indicate described second processing unit 202 to utilize new bandwidth class to redefine SRS transmitting power allowance; Otherwise, be the bandwidth of user terminal distribution current bandwidth grade correspondence.

Preferably, described second processing unit comprises: acquiring unit and subtracter; Wherein,

Described acquiring unit is used for: obtain active user's terminal sends the SRS signal in subframe power;

Described subtracter is used for: allow the power of transmission SRS signal in the subframe that transmitting power and described acquiring unit obtain to carry out subtraction to the maximum of active user's terminal correspondence, determine that the gained difference is described SRS transmitting power allowance, and notify described judgement allocation units.

Preferably, described second processing unit is further used for: utilize following formula to calculate described margin of power:

PH _{SRS_M}(i)＝PH(i)-(P _{SRS_OFFSET}+10log ₁₀(M _SRS)-10log ₁₀(M _PUSCH(i))-Δ _TF(i))

Wherein, PH (i) is the margin of power of user terminal when sending PUSCH in subframe i; P _{SRS_OFFSET}It is the exclusive parameter of user terminal of the 4bits of high-rise semi-static configuration; M _SRSIt is the bandwidth of SRS bandwidth class correspondence current in the subframe i; M _PUSCH(i) be the resource size that comes into force in the i subframe for the PUSCH distribution; Δ _TF(i) be the transformat of PUSCH among the subframe i.

Preferably, described judgement allocation units comprise: judging unit and allocation units; Wherein,

Described judging unit is used for: whether the bandwidth that the SRS transmitting power allowance of utilizing described second processing unit to calculate is judged current bandwidth grade correspondence power limited; If then notify described first processing unit decline bandwidth class, and indicate the new bandwidth class of the described second processing unit utilization to redefine SRS transmitting power allowance; Otherwise, notify described allocation units;

Described allocation units are used for: the notice according to described judging unit is launched the SRS signal for the user distributes the bandwidth of current bandwidth grade correspondence to be used for the user.

Preferably, described judging unit comprises: default unit and comparing unit; Wherein,

Described default unit is used for: default limited threshold value;

Described comparing unit is used for: the size of the threshold value that margin of power that more described second processing unit is determined and described default unit are default when described margin of power is not more than described threshold value, shows that the bandwidth power of described current bandwidth grade correspondence is limited; Otherwise, show not limited.

In addition, those skilled in the art to understand the described device of the foregoing description easily can be a kind of base station; Simultaneously; can also obtain a kind of system from the thought of the embodiment of the invention; this system comprises disclosed device in the foregoing description, and promptly any system that can realize the above embodiment of the present invention apparatus function that comprises also all should be included within protection scope of the present invention.

It will be understood by those skilled in the art that and to use many different technologies and in the technology any one to come expression information, message and signal.For example, the message of mentioning in the above-mentioned explanation, information can be expressed as voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or above combination in any.

The professional can also further should be able to recognize, the unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each specific should being used for, but this realization should not thought and exceeds scope of the present invention.

The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use the software module of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.

To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.

Claims (10)

1. a method of distributing bandwidth of uplink sounding reference signal is characterized in that, may further comprise the steps:

Determine current detection reference signal SRS bandwidth class according to scheduling bandwidth;

Determine the SRS transmitting power allowance of current SRS bandwidth class correspondence;

Utilize whether power limited of bandwidth that described SRS transmitting power allowance judges current bandwidth grade correspondence; If the bandwidth class that then descends redefines SRS transmitting power allowance; Otherwise, be the bandwidth of user terminal distribution current bandwidth grade correspondence; Judge whether power limited of current bandwidth grade by following steps: default limited threshold value; The size of more described margin of power and described threshold value when described margin of power is not more than described threshold value, shows that the bandwidth power of described current bandwidth grade correspondence is limited; Otherwise, show not limited.

2. method according to claim 1 is characterized in that:

The bandwidth of described SRS bandwidth class correspondence is the scheduling bandwidth of user terminal.

3. method according to claim 1 is characterized in that, the SRS transmitting power allowance of described definite current SRS bandwidth class correspondence realizes in the following manner:

Obtain active user's terminal sends the SRS signal in subframe power;

Maximum to active user's terminal grade correspondence allows the power of transmission SRS signal in transmitting power and the described subframe of obtaining to carry out subtraction, determines that the gained difference is described SRS transmitting power allowance.

4. method according to claim 3 is characterized in that:

Described active user's terminal of obtaining sends the power P of SRS signal in subframe _SRS(i) be that user terminal utilizes following formula to calculate and reports:

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

Wherein, P _MAXThe maximum that is user terminal grade correspondence allows transmitting power; P _{SRS_OFFSET}It is the exclusive parameter of user terminal of high-rise semi-static configuration; M _SRSIt is the bandwidth of SRS bandwidth class correspondence current in the subframe i; F (i) is the exclusive correction value of UE; P _{O_PUSCH}(j) be Physical Uplink Shared Channel received power desired value, wherein j=0 or j=1; α is the path loss compensating factor; PL is the downlink path loss of user terminal measurement.

5. method according to claim 1 is characterized in that:

Described margin of power is calculated by following formula:

PH _{SRS_M}(i)=PH (i)-(P _{SRS_OFFSET}+ 10log ₁₀(M _SRS)-10log ₁₀(M _PUSCH(i))-Δ _TF(i)) wherein, PH (i) is the margin of power of user terminal when sending PUSCH in subframe i; P _{SRS_OFFSET}It is the exclusive parameter of user terminal of high-rise semi-static configuration; M _SRSIt is the bandwidth of SRS bandwidth class correspondence current in the subframe i; M _PUSCH(i) be the resource size that comes into force in the i subframe for the PUSCH distribution; Δ _TF(i) be the transformat of PUSCH among the subframe i.

6. method according to claim 1 is characterized in that:

Described limited threshold value can be set according to simulation study and real system service data.

7. a device that distributes bandwidth of uplink sounding reference signal is characterized in that, comprising: first processing unit, second processing unit and judgement allocation units; Wherein,

Described first processing unit is used for: determine current detection reference signal SRS bandwidth class according to scheduling bandwidth;

Described second processing unit is used for: the current SRS bandwidth class that utilizes described first processing unit to determine calculates the SRS transmitting power allowance of current SRS bandwidth class correspondence;

Describedly judge that allocation units are used for: whether the bandwidth that the SRS transmitting power allowance of utilizing described second processing unit to calculate is judged current bandwidth grade correspondence power limited; If then notify described first processing unit decline bandwidth class, and indicate the new bandwidth class of the described second processing unit utilization to redefine SRS transmitting power allowance; Otherwise, be the bandwidth of user terminal distribution current bandwidth grade correspondence; Described judging unit comprises: default unit is used for default limited threshold value; Comparing unit is used for the size of the threshold value margin of power that more described second processing unit determines and described default unit preset, when described margin of power is not more than described threshold value, shows that the bandwidth power of described current bandwidth grade correspondence is limited; Otherwise, show not limited.

8. device according to claim 7 is characterized in that, described second processing unit comprises: acquiring unit and subtracter; Wherein,

Described acquiring unit is used for: obtain active user's terminal sends the SRS signal in subframe power;

Described subtracter is used for: allow the power of transmission SRS signal in the subframe that transmitting power and described acquiring unit obtain to carry out subtraction to the maximum of active user's terminal grade correspondence, determine that the gained difference is described SRS transmitting power allowance, and notify described judgement allocation units.

9. device according to claim 7 is characterized in that:

Described second processing unit is further used for: utilize following formula to calculate described margin of power:

PH _{SRS_M}(i)＝PH(i)-(P _{SRS_OFFSET}+10log ₁₀(M _SRS)-10log ₁₀(M _PUSCH(i))-Δ _TF(i))

Wherein, PH (i) is the margin of power of user terminal when sending PUSCH in subframe i; P _{SRS_OFFSET}It is the exclusive parameter of user terminal of high-rise semi-static configuration; M _SRSIt is the bandwidth of SRS bandwidth class correspondence current in the subframe i; M _PUSCH(i) be the resource size that comes into force in the i subframe for the PUSCH distribution; Δ _TF(i) be the transformat of PUSCH among the subframe i.

10. according to any described device of claim 7 to 9, it is characterized in that described judgement allocation units comprise: judging unit and allocation units; Wherein,

Described judging unit is used for: whether the bandwidth that the SRS transmitting power allowance of utilizing described second processing unit to calculate is judged current bandwidth grade correspondence power limited; If then notify described first processing unit decline bandwidth class, and indicate the new bandwidth class of the described second processing unit utilization to redefine SRS transmitting power allowance; Otherwise, notify described allocation units;

Described allocation units are used for: the notice according to described judging unit is the bandwidth that user terminal distributes current bandwidth grade correspondence.

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