WO2011116720A2 - Method, device and base station for allocating power - Google Patents

Abstract

A method, a device and a base station for allocating power, which can provide optimal energy efficiency for a system, are disclosed in the embodiments of the present invention, wherein the method includes: when total transmitting power P_t is a fixed value, computing a proportion α of reference signal power to the fixed value and a proportion β_m of user data power of a user U_m to the fixed value, wherein the user U_m is any user in connection state in the system; according to the proportion α and proportion β_m, judging whether the energy efficiency of the system is maximum when the total transmitting power P_t is the fixed value; if yes, obtaining the proportion α and proportion β_m, otherwise, updating the total transmitting power P_t; computing the proportion α and proportion β_m after the total transmitting power P_t is updated, and judging whether the energy efficiency of the system is maximum after the total transmitting power P_t is updated; if yes, obtaining the computed proportion α and proportion β_m after the total transmitting power P_t is updated. The method provided in the present invention can further reduce system power consumption based on optimizing total power, reduce total energy consumption of the air interface of the system greatly, and realize efficient power saving.

Description

 Power distribution method, device and base station

 The present invention relates to the field of wireless communications, and in particular, to a power allocation method and apparatus, and a base station. Background technique

 As people's demand for wireless communication services continues to increase, the types of communication services have expanded from traditional low-speed voice communication services to high-speed multimedia data services. According to Shannon's information theory, the increase in data rate requires more bandwidth and consumes more power. In the case that the spectrum resources are already scarce, the improvement of system performance cannot be realized by simply increasing the system bandwidth. Most of the strategies adopted by the existing systems are to increase the system bandwidth while increasing the system's transmit power.

 The increase in transmit power tends to have a large negative impact while at the same time bringing high data rates and high throughput. From the perspective of environmental protection, high transmission power will lead to more energy consumption for communication, which indirectly leads to more environmental pollution; from the perspective of communication equipment suppliers, high power consumption will lead to equipment manufacturing. Significantly increased costs, especially for battery-powered mobile communication devices, such as cell phones, high energy consumption often leads to a significant reduction in equipment life. Therefore, how to design an energy-efficient communication system has become a topic of great concern. Traditional communication systems are often designed with maximum throughput. Under this design rule, systems often transmit at the maximum transmit power. However, while this design criterion maximizes throughput but does not guarantee efficient use of transmit power, how to determine the total transmit power of the system from an energy efficient perspective is a new topic.

The reference signal is a known signal for channel estimation provided by the transmitting end to the receiving end. Transmitting a high-power reference signal ensures channel estimation accuracy, ensures cell coverage, and improves signal detection performance. On the other hand, improving the transmission power used to transmit user data information can also improve system performance. However, the total transmission power used for reference signal transmission and user data transmission is limited, the power occupied by the reference signal (hereinafter referred to as "reference signal power") and the power occupied by user data (hereinafter referred to as "user data power") The relationship is the same, that is, if the power used for the reference signal transmission is large, the power used for user data transmission is correspondingly small, and vice versa, if the power used for the reference signal transmission is small, The power of user data transmission will be correspondingly large. In a system with limited total power transmission, how to properly allocate the power for reference signals and user data is a matter of great concern to the industry. question.

In view of the above-mentioned problems in the industry, the prior art proposes a channel threshold-based power allocation method in an OFDM (Frequency Division Multiplexing) system, which is based on channel gain and total system power limit. owned. The specific power allocation expression is as follows:

 I _

p . = MMSE; ¹ (min{l, η Ι γΛ) , > η

Where is the power on the first subcarrier, which is the ratio of the channel gain to the noise power on the first subcarrier, MMSE. (p^) is the minimum mean square error (MMSE) estimate of the data on the first subcarrier. Estimated mean square error, η is the channel threshold, which is obtained by the following system total power limit conditions.

Compared with the traditional irrigation power algorithm, this method can better adapt to the characteristics of discrete non-Gaussian distribution of transmitted signals.

 Since the above prior art utilizes small-scale channel information (instantaneous channel information), that is, channel information with fast time-scale changes for power allocation, it is necessary to frequently feed back a large amount of channel information and inform the receiver of power allocation information, which leads to Additional signaling overhead. On the other hand, the above prior art only considers the allocation of power (power for user data transmission) on the subcarriers, and how to perform power allocation when using the reference signal for channel estimation is not involved, and only the mutual information amount is the largest. The power distribution is not considered, and the power distribution scheme is designed from the perspective of optimal energy efficiency.

Summary of the invention

 Embodiments of the present invention provide a power allocation method and apparatus, and a base station, which provide optimal energy efficiency for the system.

An embodiment of the present invention provides a power allocation method, including: calculating a ratio of _a reference signal power to a predetermined value _a and a user data power of _a user U _m to a predetermined value when a total transmission power is a fixed value Example jS _m, Um said user is any user in the system in a connected state; and said ratio according to the ratio of /, determines the transmission power of a total system energy efficiency to whether the maximum value, if yes, obtaining Calculating the ratio and ratio, otherwise, updating the total transmission power to calculate the ratio a and the ratio β _Μ after updating the total transmission power P _t , and determining whether the energy efficiency of the system is maximum after the total transmission power P _{t is} updated, if Then, the ratio "sum ratio" calculated after the total transmission power update is obtained.

An embodiment of the present invention provides a power allocation method, including: acquiring a total transmission power P _t when the energy efficiency of the system is maximum, a ratio a when the reference signal power accounts for the fixed total power P _t is a fixed value, and a user of the user 1^ The ratio of the data power to the total power of the transmission is the fixed value; if the product of the sum, P _t a is greater than or equal to the minimum value of the reference signal power, the ratio a and the ratio are used as the power distribution ratio of the reference signal and the power of the user data, the conversion to the final transmission to the power conversion efficiency;?? if the, P _f, and the product does not satisfy the reference signal is greater than or equal to the power a minimum value of this condition, when the reference signal power is equal to the /^ condition, re-acquiring the ratio a of the reference signal power to the fixed value when the total transmission power is the fixed value and the ratio The user data power of the user Um accounts for the ratio of the fixed value.

An embodiment of the present invention provides a power distribution apparatus, including: a ratio calculation module, configured to calculate a ratio a of a reference signal power to a predetermined value when a total transmit power is a fixed value, and a user data power of a user U _m The ratio of the value β _Μ , the user U _m is any user in the connected state in the system; the judgment processing module is configured to calculate the ratio “and the ratio according to the ratio calculation module, and determine that the total power of the transmission is Whether the energy efficiency of the system is the largest when the value is stated, and if so, the ratio and ratio are obtained, otherwise the total power of the transmission is updated.

The ratio calculation module is further configured to calculate the ratio and the ratio β _Μ after the total transmission power/^ update, and the determining processing module is further configured to determine whether the energy efficiency of the system is the largest after the total transmission power P _{t is} updated. If yes, the ratio "sum ratio" calculated after the total transmission power update is obtained.

 An embodiment of the present invention provides a base station, where the base station includes the foregoing power distribution device.

An embodiment of the present invention provides a power distribution apparatus, including: a first acquiring module, configured to acquire a total transmission power P _f when the energy efficiency of the system is maximum, and a ratio of a reference signal power to a total value of the total transmission power/^ a user data power of a and user Um occupies a ratio β _Μ when the total transmission power / ^ is a fixed value; a second obtaining module, configured to: if the product of the sum, and ? is greater than or equal to a minimum value of the reference signal power, the proportion and the ratio are used as a ratio of the reference signal power to the user data power , the conversion efficiency of the conversion to the final transmission power;

a third obtaining module, configured to: if the product of the sum and the sum does not satisfy a condition that is greater than or equal to a minimum value of the reference signal power, re-acquire and transmit the condition that the reference signal power is equal to the /^ When the total power is the fixed value, the ratio of the reference signal power to the fixed value a and the user data power of the user Um occupy the ratio β _Μ of the fixed value.

 An embodiment of the present invention provides a base station, where the base station includes the foregoing power distribution device.

As can be seen from the foregoing embodiments of the present invention, the embodiment of the present invention considers the power allocation from the ratio of the reference signal power to the ratio of the total transmission power to a certain fixed value and the ratio of the user data power to the fixed value. The technology only considers the different allocation of user data power, taking into account the situation of channel estimation using reference signals. The joint design reference signal power and user data power of the present invention can further reduce system power consumption based on optimizing total power. . On the other hand, the method provided by the embodiment of the present invention determines whether the energy efficiency of the system is the largest when the total power is a certain value, and the reference signal power and the user are allocated according to the ratio a and the ratio β _求 obtained when the energy efficiency of the system is maximum. The data power, therefore, the invention transmits the total power from the perspective of optimal energy efficiency, and the overall energy consumption of the system air interface is greatly reduced compared with the traditional method of transmitting the maximum transmission power of the system, thereby achieving high efficiency and energy saving.

DRAWINGS

 In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the prior art or the embodiments will be briefly described below. Obviously, the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained as those of ordinary skill in the art without any inventive labor.

 1 is a schematic flowchart of a power allocation method according to an embodiment of the present invention;

 2 is a schematic flowchart of an iterative search ratio and scale method according to an embodiment of the present invention; FIG. 3 is a flowchart of a power allocation method according to another embodiment of the present invention;

4 is a flowchart of a power allocation method according to another embodiment of the present invention; FIG. 5 is a flowchart of a power allocation method according to another embodiment of the present invention; FIG.

 6 is a schematic diagram of a logical structure of a power distribution apparatus according to an embodiment of the present invention;

 FIG. 7 is a schematic diagram of a logic structure of a power distribution apparatus according to another embodiment of the present invention; FIG. 8 is a schematic diagram of a logic structure of a power distribution apparatus according to another embodiment of the present invention; FIG. 9 is a schematic diagram of another embodiment of the present invention. FIG. 10 is a schematic diagram of a logical structure of a power distribution apparatus according to another embodiment of the present invention; FIG. 11 is a schematic diagram of a logical structure of a base station according to an embodiment of the present invention;

 FIG. 12 is a schematic diagram of a logical structure of a power distribution apparatus according to another embodiment of the present invention; FIG. 13 is a schematic diagram of a logical structure of a power distribution apparatus according to another embodiment of the present invention; FIG. 15 is a schematic diagram showing the logical structure of a power distribution device according to another embodiment of the present invention; FIG. 16 is a schematic diagram showing the logical structure of a power distribution device according to another embodiment of the present invention; FIG. 17 is a schematic diagram of a logical structure of a power distribution apparatus according to another embodiment of the present invention; FIG. 18 is a schematic diagram of a logical structure of a power distribution apparatus according to another embodiment of the present invention; A schematic diagram of a logical structure of a power distribution device; FIG. 20 is a schematic diagram of a logical structure of a base station according to another embodiment of the present invention.

detailed description

 Embodiments of the present invention provide a power allocation method and apparatus, and a base station, which provide optimal energy efficiency for the system.

 BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without the creative work are all within the scope of the present invention.

1 is a schematic flowchart of a power allocation method according to an embodiment of the present invention. The method can be applied to various devices that need to send signals, such as various communication base stations. Method in this embodiment Mainly includes the steps:

5101. Calculate a ratio β of the reference signal power to the fixed value when the total transmit power P _f is a fixed value, and a ratio β _Μ of the user data power of the user U to the fixed value.

 In the embodiment of the present invention, the total power to be transmitted includes two parts, that is, power for transmitting the reference signal (the cartridge is referred to as "reference signal power") and power for transmitting user data (the cartridge is called "user data power"). . User U is any user in the system that is connected.

Since the linear amplification area of the power amplifier is limited, the total transmission power is always limited by the maximum total power. Therefore, as an embodiment of the present invention, the fixed value may be the maximum total transmission power of the total transmission power, that is, the total transmission power Power / ^ is the maximum total transmit power P. At the beginning, the reference signal power is calculated to account for the maximum total transmission power P. The ratio a and the user data power account for the maximum transmitted total power P. The ratio β _Μ , then, can gradually reduce the total transmitted power. Obviously, the limitations of the embodiments provided by the present invention are:

p _t ≤p ₀ o<J<i Restriction condition ¹ 0 ≤ ≤1, m = l,..., M Here, P. Is the maximum total transmit power, for example, taking the maximum value of the power amplifier, and M is the number of connected users in the system.

 5102. Calculate the ratio and the ratio calculated according to step S101, and determine whether the energy efficiency of the system is the maximum when the total transmission power/^ is the fixed value. If yes, obtain the ratio and ratio. Otherwise, update the total transmission power.

As an embodiment of the present invention, according to the ratio and the ratio, determining whether the energy efficiency of the system is maximum when the total value of the total power is transmitted may be: determining, according to the ratio and the ratio, the total power of the transmission P _t At the maximum, the system has the highest energy efficiency.

In the embodiment of the present invention, the energy efficiency 7 of the system is defined as the amount of information transmitted under unit energy consumption. which is:

p _t + p _c

Here, P _f is the total power transmitted by the system, ^ is the sum of the circuit loss and the static power consumption, M is the number of users in the connected state in the system, and C _m is the system capacity of the mth user; further expressed as: C _m = learning _{g2 (1 + 2} „

a _m (L _mm + N _m a) where Δ/ is the subcarrier bandwidth, N _m is the number of subcarriers occupied by the user m, and 7 is the conversion efficiency of the total transmit power P _t converted to the final transmit power. The ratio of the reference signal power to the total transmit power P _{t is} the ratio of the user data power of the mth user to the total transmit power/^, which is the large-scale channel gain of the mth user, and is the noise power of the mth user. , L _m is the number of resolvable multipaths of the mth user experiencing the channel.

When the ratio of the reference signal power to the maximum total transmission power CC and the user data power of the user _{UTM to the} maximum total transmission power β _Μ are obtained, the ratio (and the ratio β _Μ according to the allocated reference signal power and the user data power) .

S103. Calculate a ratio and a ratio of the total power update after the step S102 is sent, determine whether the energy efficiency of the system after the total transmission power is updated is the largest, and if yes, obtain the ratio a and the ratio β calculated after the total transmission power is updated. _Oh .

In the embodiment of the present invention, the ratio a and the ratio of the total power P _t updated in the step S102 are calculated, and the ratio of the reference signal power to the maximum total transmission power and the user of the user U when calculating the total transmission power ^ maximum is calculated. The ratio of the data power to the maximum total transmission power is similar, and the difference is only that the total power used for the calculation of the used parameters is changed.

As an embodiment of the present invention, when determining whether the energy efficiency of the system is maximum after the total transmission power P _{t is} updated, the energy efficiency of the system after the total power is updated may be compared with the energy efficiency of the system before the update, and the total power is updated to determine the energy efficiency when updating. Whether the growth rate reaches the set accuracy, and if so, the total transmission power is judged. The energy efficiency of the system is maximized after the update. For example, the setting accuracy is assumed to be the energy efficiency of the system before the total power is updated; ^, the energy efficiency of the system after the total power update is „, if i) _{≤ i is} established, then the energy efficiency growth rate of the total power update is determined to be set. The accuracy, otherwise, the total transmission power is updated again and it is judged whether the energy efficiency growth rate at the time when the total transmission power is updated again reaches the set accuracy _fl .

It can be seen from the foregoing embodiments of the present invention that the power allocation is considered in terms of the ratio of the reference signal power to the maximum transmission total power and the ratio of the user data power to the maximum transmission total power, so that only the user is considered in the prior art. The allocation of data power is different, taking into account the situation of channel estimation using reference signals. The joint design of reference signal power and user data power of the present invention can further reduce system power consumption based on optimizing total power. On the other hand, the method provided by the embodiment of the present invention determines whether the energy efficiency of the system is the largest when the total power is a certain value, and the reference signal power and the user are allocated according to the ratio a and the ratio β _求 obtained when the energy efficiency of the system is maximum. The data power, therefore, the invention transmits the total power from the perspective of optimal energy efficiency, and the overall energy consumption of the system air interface is greatly reduced compared with the traditional method of transmitting the maximum transmission power of the system, thereby achieving high efficiency and energy saving.

In an embodiment of the present invention, calculating a ratio of a reference signal power to the maximum transmission total power and a ratio of a user data power of the user U _m to the maximum transmission total power when the total transmission power is maximum may be according to the maximum The total power is transmitted, and the ratio of the reference signal power to the maximum total transmission power a and the user data power of the user U _{m to} the maximum transmission total power when the total transmission power P _{f is} maximum is calculated by using an iterative search. Iterative search for the maximum total power calculates the transmission power of the reference signal representing the maximum total transmit power of the user 1 ^ A and a proportion of user data representing the maximum transmission power ratio _β Μ total power comprises the step of Figure 2 example:

 5201, setting the reference signal power to the ratio of the maximum transmitted total power a to set an initial value;

5202. The initial value set by the maximum transmission total power and the ratio, and the ratio of the user data power of the user Um to the maximum total transmission power is obtained β _Μ ; In the embodiment of the present invention, the expression is specifically

-N _m cip _m cP ₀ +2 )+ (p aP ₀ +7 J -^{ρ _Ψηι οΡ ₀ - )

Where N _m is the number of subcarriers occupied by the user UTM, P. For the maximum transmitted total power, p is the corpse. Converting to the conversion efficiency of the final transmit power, ^ is the large-scale channel gain of the user UTM, the noise power of the user Um, L _m is the number of resolvable multipaths that the user Um experiences the channel, and V is the Lagrangian multiplier, Satisfied ^;! ! ^ , ^^)) ^- , can use the dichotomy to find the optimal V, M is the number of connected / 3⁄4 in the system.

S203, determining the ratio of the initial value is set when the ratio of a set initial value satisfies the acquired acquired <, places _β Μ acquired at this time and the initial value of the ratio, respectively, as a set of

The ratio of the user data power to the maximum transmission total power and the reference signal power to the maximum transmission total power, otherwise, updating the value of the ratio (S204), where £ ₃ is the empirical value, one- ^{1 (1} to - ^5. In the above embodiment, for the update of the ratio, according to the formula

Update, in the formula, „ is the updated value, // ₂ is the step size. The step / / ₂ can be the selected fixed value or the optimal step size obtained by some optimization method, such as the dichotomy.

Since the limitation of the embodiment of the present invention shown in FIG. 1 exists, the implementation process of the technical solution of the embodiment of the present invention shown in FIG. 1 is actually 1. Where the symbol "max" represents the objective function, ie, the energy function

Maximum value,

The item below "st" indicates the constraint 1. ^{Ρ Ρ} .

 The objective function of optimization problem 1 (ie, energy efficiency function 7) is a quasi-convex function, and constraint 1 is a linear constraint. Therefore, optimization problem 1 is a quasi-convex problem. According to the optimization theory, it is easy to obtain the above problem. There is a unique ratio of the optimal total transmission power, the reference signal power, and the user data power to the optimal total transmission power.

For the solution of optimization problem 1, you can first solve for the total power of the transmission when taking a special value, ie

St. P _t <P ₀

 M 0<r<l Optimization problem 1

0 ≤ _m ≤ l, m = l, ---,

The total transmit power takes the maximum value P. Whether the energy efficiency of the system is the largest, if the maximum, the user data power of the user U _m respectively obtained by the sum ratio a obtained at this time accounts for the maximum total transmission power P. The ratio and reference signal power account for the maximum transmitted total power P. proportion.

 As an embodiment of the present invention, when determining whether the energy efficiency of the system is maximum when the total transmission power is maximum, the following method may be implemented:

 51, calculate the energy efficiency function, the partial derivative of the total power transmitted ^;

 p

The energy efficiency function 7 is ^{1 mg} ol{L _m+ N _m a) where Δ/ is the subcarrier bandwidth, N _m

P _t +P _c

For user U, the number of subcarriers is occupied, /^ is the sum of circuit loss and static power consumption, ? is the conversion efficiency of the conversion to final transmission power, ^ is the large-scale channel gain of user U, and the noise power of user Um , L _m is the number of resolvable multipaths that the user U experiences the channel, and M is the number of users in the system that are connected.

It should be noted that since ^ is the large-scale channel gain of the user U, the power allocation algorithm based on the prior art based on small-scale channel information (that is, channel information with fast time-scale changes, for example, instantaneous channel information, etc.) The power distribution method according to the embodiment of the present invention is provided by the present invention, according to the channel large-scale channel information (that is, the channel information that is invariant for a long time, such as path loss, shadow fading, and large-scale channel gain, etc.). The amount of channel information required is small, and the feedback frequency is low. If the partial derivative ^ is at the total transmission power / ^ is the maximum transmission total power P. The value of time, that is, greater than or equal to 0, determines that the system has the highest energy efficiency when the total transmission power is maximum.

In this embodiment, the foregoing determines the principle of whether the energy efficiency of the system is maximum when the total power/^ maximum is transmitted. 在于: ≥ 0, indicating that the energy efficiency function 7 is an increasing function with respect to the total power of transmission P _f , and its physical meaning is dP _t

The system energy efficiency increases as P _f increases, so when it reaches its maximum value P. At this time, the energy efficiency 7 of the system is obviously the largest.

 Referring to FIG. 3, it is a flowchart of a power allocation method according to another embodiment of the present invention. It can be used as a supplementary description of the power allocation method provided in the example of FIG.

 5301, setting a maximum transmit power;

 For example, set the transmit power / ^ to the maximum value P. , can be the maximum value of the power amplifier.

 5302, iterative search determines the proportion and proportion;

The iterative algorithm exemplified in FIG. 2 can be used to calculate the reference signal power as the maximum total transmission power P according to Δ/, N _m , ρ, ψ _Μ , a _m ² , L _m , and the like. The ratio "and user data power accounts for the maximum transmitted total power P. proportion. Δ /, N _m , ρ , ψ _η , σ , L _m , Ρ _{ε have} the same meanings as Δ /, N , ρ, ψ , σ , L , in the previous examples, do not like

 Next:

305;

S305, updating the total transmit power ^, that is, sending the total power according to the expression P _n = P _n _ _x + μ _λ

Update, where Ρ„ is the dP _t

The total transmit power at w iterations, A is the iteration step size, which can be set to a fixed value, or set to the optimal value found by some optimization algorithm (for example, dichotomy).

 S306, iteratively searching to determine the proportion and proportion;

 The method is similar to S302, that is, the iterative algorithm illustrated in Fig. 2 can be employed. The difference is that the total transmitted power at this time is the maximum value P. Change to a different value.

S307, calculating the energy efficiency function; 7„ and /7„ the partial derivative of the total power transmitted. The expression of the partial derivative is the same as the expression of the partial derivative in the embodiment S303.

 S308, judging the energy efficiency obtained by the iteration; „the energy efficiency obtained from the last iteration; the energy efficiency growth rate compared with 7„-i reaches the set precision.

For example, the setting accuracy is _fl (generally set to 10 - ¹ ~ 10- ⁵ ), assuming that the total power is transmitted / ^ before the update (that is, the total transmitted power at the _w - l iterations / ^) ;;^ , after the total power is sent (ie, the total power transmitted at the _wth iteration), the energy efficiency of the system is;; „, if n ) ^ , the energy efficiency obtained by this iteration is judged; Energy efficiency; 7„-i, the growth rate can reach the set accuracy.

Further, it can also be determined that when the total transmission power is updated (that is, whether the total energy efficiency growth rate at the w-1th iteration reaches the set f ₂ can be set to 10 - ^{1 (1} ~ 10- precision, Otherwise return to step S305 ₍

 It should be noted that, in the above embodiment of the present invention, the reference signal power and the user data power can be allocated according to the ratio as long as the ratio and the ratio are solved. The following embodiments are the same and will not be described again.

In an actual communication system, the reference signal may have other uses besides being used for channel estimation, for example, to ensure a certain cell coverage. Therefore, the reference signal power takes a value higher than a certain threshold, that is, paP _t ≥ Ρ _α , where ^ is the minimum value of the reference signal power, and the meanings of ρ, and are the same as in the previous embodiment. That is to say, when the constraint 7 ≥ 4 is added, the optimization problem 1 is converted into the following optimization problem 2:

Wherein the symbol "max" represents the objective function, that is, the maximum value of the energy function 1 ^mg ol{L _{m +} N _m ay , and the items below "st " indicate the constraint. ^

The solution process of the optimization problem 2 is as shown in FIG. 4, and the power distribution method provided by the embodiment of the present invention is provided. ∑ _m log ₂ (1 + " ^Hm ' )

o _m (L + N _m )

 Max

P _t + P _c

St. P _t ≤P ₀

p P _t ≥ P _a

 M

 "+∑ = i

 m=\

 .Optimization problem 2

0 < α≤1

0≤β _η ≤1, m = l,..., schematic diagram, mainly including steps:

S401, obtaining the total system energy efficiency of the transmission power at the maximum, the reference signal representing the transmission power ratio when the total power of a predetermined value and the user data of the user U _m representing the transmission power of the predetermined total power value when proportion.

In an embodiment of the present invention, the value is the maximum total transmission power of the total transmission power. At this time, the total transmission power p _f and the reference signal power of the system when the energy efficiency of the system is maximized are The proportion of the ratio a and the user data of the user U _m when the total transmission power is the fixed value is: the total transmission power when the energy efficiency of the system is maximized, and the reference signal power accounts for the maximum transmission total. The ratio of the power a and the user data power of the user U _m account for the ratio of the maximum transmitted total power.

The basic idea of solving the optimization problem 2 is to first solve the optimization problem 1 to get ^ a, { } ₌₁ (the symbol " U " indicates the ratio of the user data power of the first user to the Mth user to the maximum total transmission power), ie Including the following steps:

S4011, calculation of the total power transmission / ^ maximum reference signal power the maximum proportion of the total transmission power of a user and the user data U _m representing the maximum transmission power ratio of the total power of the user within the system is U _m Any user of the connection status;

 54012. Determine, according to the ratio and the ratio, whether the energy efficiency of the system is the largest when the total power of transmission/maximum is maximum, and if yes, obtain the ratio “sum ratio, otherwise update the total power of the transmission/^

54013, calculating the ratio and ratio after the total transmission power/^ is updated, and determining the After updating the total power transmission system if the maximum energy efficiency, if yes, obtaining the resulting transmission ratio and _a ratio of the total power update computation β _Μ.

 Regarding the solution of the optimization problem 1, the more detailed steps can be referred to the foregoing embodiment.

S402. If the product of _Pt and a obtained in step S401 is greater than or equal to a minimum value of the reference signal power, the ratio and the ratio are used as a ratio of the reference signal power and the user data power.

 In the present embodiment, ? is converted to the conversion efficiency of the final transmission power. If /^ is established, the total transmit power and power ratio at this time is also the optimal solution for optimization problem 2, and the solution process ends.

S403. If the product of the sum and the sum does not satisfy the condition that the value of the reference signal power is greater than or equal to ^, the total transmit power is reacquired under the condition that the reference signal power is equal to the /^. The ratio of the reference signal power to the fixed value when the value is fixed "the ratio of the user data power of the user U _m to the fixed value β _Μ .

In an embodiment of the maximum transmit total power of the total transmit power, if the product of the p and the sum does not satisfy a condition that is greater than or equal to a minimum value of the reference signal power / ^, then Ratio of the reference signal power to the fixed value and the ratio of the user data power of the user Um to the fixed value when the fixed value of the total power is re-acquired under the condition that the reference signal power is equal to the condition is:? if the, P _f, and the product does not meet the minimum value is greater than or equal to the reference signal power ^ this condition, the total transmit power to reacquire the reference signal at a power equal to said / ^ of The ratio of the reference signal power to the maximum transmission total power and the ratio of the user data power of the user Um to the maximum transmission total power β _Μ .

If c^≥ /^ does not hold, solve the following optimization problem 3: To solve the optimization problem 3, the variable can be replaced, ie, by the relation = Ρ. - / ? and Y _m = β„Ά Ι(Ά - Ρα ' Ρ) Replace ^ = (l + 4 / Ρ _β Ρ).

St P _t ≤ P ₀

p P _t = P _a . Optimization problem 3 m=l

 0< ≤l

≤β _Μ ≤1, m = l,...,M

 Optimization problem 3 is transformed as an optimization question 4:

St Ρ _β ≤Ρ ₀ -Ρ _α Ιρ

 Μ .Optimization problem 4

∑r _m = i

 m=l

Q ≤ Y _m <\, m = l, ..., M where ^ represents the sum of the user data powers for a plurality of users, and represents the ratio of the user data power of the user U to /^. Thanks = Ρ. - /?, Therefore, if the total power / ^ maximum (which is Ρ.) is sent, it is also the largest. That is to say, the solution of the optimization problem 4 is actually equivalent to re-acquiring the ratio of the reference signal power to the maximum transmission total power a and the user U _m when the reference signal power is equal to ^. The ratio of data power to the maximum transmitted total power β _Μ , including steps

S4031, calculating the sum of the user data powers of the plurality of users Ρ _β is the ratio y _m of the user data power of the user Um when max is maximal, and the maximum is Ρ-Ρ _α Ιρ , Ρ. Send the total power for maximum;

That is, by the relation = Ρ. - /? And ^ =^P. /CP. - Replace it

According to the ratio of the user data power of the user U _m obtained when the energy efficiency of the system is maximum to the maximum total transmission power, the following is calculated:

Ύπι

S4032: determining, according to the ratio obtained by the proportional step S4031, whether the energy efficiency of the system is the largest when the sum of the user data powers of the plurality of users is greater than ^, and if so, determining the ratio and the proportion according to the ratio ^, otherwise, Update the /^ and determine whether the energy efficiency of the system after the /^ update is the largest.

In this embodiment, it is determined whether the energy efficiency of the system is the largest when the sum of the user data powers ρ _{β of the} plurality of users is the largest. In the foregoing embodiment of the present invention, it is determined whether the energy efficiency of the system is the maximum when the total transmission power is maximum, and the steps include:

 S40321, calculating the energy efficiency function with respect to the partial derivative of / ^; the energy efficiency function 7 is , where Δ / is the subcarrier bandwidth,

N _m is occupied by the user U _m

The sum of power consumption is the large-scale channel gain of the user u _m , the noise power of the user 1 , L _M is the number of resolvable multipaths that the user U _m experiences the channel, and M is the number of users in the system in the connected state.

The partial derivative of 7 is:

S40321, if the partial derivatives of the plurality of users in a user data value and the maximum powers of _Ρ ρ is greater than or equal to 0, it is determined that the power of the user data and the plurality of users / ^ maximum system The most energy efficient.

In this embodiment, the principle of determining whether the energy efficiency of the system is maximum when the sum of the user data powers of the plurality of users is the maximum 在于_β is: ≥ 0 indicates that the energy efficiency function 7 is an increasing function, and the physical meaning is that the system energy efficiency is The increase is increased, so when the maximum value is taken, the energy efficiency 7 of the system is obviously the largest.

In this embodiment, determining whether the energy efficiency of the system after maximizing / ^ is updated includes: determining whether the energy efficiency growth rate at the time of updating reaches the set accuracy, and if so, determining that the energy efficiency of the system after the update is updated The biggest. For example, the setting accuracy is f ₄ , assuming that the energy efficiency of the system before the update is; ^, the energy efficiency of the system after updating is 7;, if ⁽ d) _{≤ 4} , it is judged that the energy efficiency growth rate of the system reaches the set accuracy when updating. Otherwise, it is again / / and judges whether the energy efficiency growth rate at the time of the update is up to the set accuracy.

The method of summing the data powers may be: placing the /^ where ρ is the updated value of /^, ρ„-i is the ^

 After determining whether the energy-efficiency growth rate at the time of the update reaches the set accuracy, the method further includes:

Accuracy, where £ ₅ is the accuracy of the algorithm and can be set according to the accuracy requirements. Generally, it can be set to 10- ⁵ ~

10- ¹⁰ .

Referring to FIG. 5, which is a flowchart of a power allocation method according to another embodiment of the present invention, iteratively optimizing /^ and { }: ₌₁ can be used as a supplementary explanation for the power allocation method provided in the example of FIG. Mainly includes the steps:

 5501, set /^ to the maximum value

The meanings of Ρ _β , Ρ ₀ , /^ and are the same as those of Ρ ₀ , /^ and ? as exemplified in Fig. 4, respectively.

5502, seeking d;

In irJL, the symbol "{ iti " indicates the ratio of the user data power of the first user to the Mth user to ρ _β . Can be obtained according to Δ/, N _m , p, y/ _m , σ , L _m , P _c , ^ and solving the optimization problem 1

Where v is the Lagrangian multiplier and V satisfies m _ax (0, y„») = l, which can be obtained by the dichotomy

Otherwise

, enter the step

long.

 5506, calculating the proportion of the updated ^;

According to Δ / , N _m , p , _{¥ m} , a _m ² , L _m , P _c , ^ and other system inputs and the updated / V calculation ^ updated ratio γ _Μ , the method and the steps illustrated in Figure 4 S4031 calculates the sum of the user data powers of the plurality of users Ρ _{β is the} maximum when the user data power of the user U _m is proportional to the ratio y _m of Ρ _β . The difference is that the sum ρ _β of the user data powers of a plurality of users at this time is changed from the maximum value Ρ _{0 -} Ρ _α ίρ to other values.

 5507, calculating the energy efficiency function and its partial derivatives;

 The partial derivative of ^. Δ / is the subcarrier bandwidth,

N _m

And, ^ is the large-scale channel gain of the user u _m , the noise power of the user UTM, L _m is the number of resolvable multipaths that the user UTM experiences the channel, and M is the number of users in the system that are connected.

The partial derivative of 7 is:

{P _p +P _c +P pf '

S508, judging the energy efficiency obtained by the iteration; „the energy efficiency obtained from the last iteration; the energy efficiency growth rate compared with 7„-i reaches the set precision.

For example, the setting accuracy is £ ₄ (generally set to 10 - ⁵ - 10" ¹⁰ ), assuming the sum of the user data powers of multiple users / ^ before the update (ie the total transmit power at the _w -1 iterations) /^) The energy efficiency of the system is; ^, the sum of the user data powers of multiple users ^ after updating (ie, the total power transmitted at the Wth iteration), the energy efficiency of the system is; if ("U ≤ ε ₄ , then judge this The energy efficiency obtained from the next iteration and the last iteration

Compared to the energy efficiency, the energy efficiency growth rate reaches the set accuracy.

Furthermore, when a plurality of users can also determine the powers of the user data and update (i.e., a d _w -l updated first iteration of P "when the first / ί iterations) the growth rate of the energy efficiency reaches a set precision For example, based on <£ · ₅ is established, £ ₅ - generally may be set to ^{10-1 (1} ~ ^10-5.

If it is true, it ends, otherwise it returns to step S505. It should be noted that, in the above embodiment of the present invention, the reference signal power and the user data power can be allocated according to the ratio as long as the ratio and the ratio are solved.

It can be seen from the foregoing embodiments of the present invention that the power allocation is considered in terms of the ratio of the reference signal power to the maximum transmission total power and the ratio of the user data power to the maximum transmission total power, so that only the user is considered in the prior art. The allocation of data power is different, taking into account the situation of channel estimation using reference signals. The joint design of reference signal power and user data power of the present invention can further reduce system power consumption based on optimizing total power. On the other hand, the method provided by the embodiment of the present invention determines whether the energy efficiency of the system is the largest when the total power is a certain value, and the reference signal power and the user are allocated according to the ratio a and the ratio β _求 obtained when the energy efficiency of the system is maximum. Data power, therefore, the present invention designs the system to transmit the total power from the perspective of optimal energy efficiency and guarantees a certain basis on this basis. Compared with the traditional method of transmitting the maximum transmit power of the system, the cell coverage greatly reduces the overall energy consumption of the system air interface and achieves high efficiency and energy saving.

 Further, the embodiment of the present invention further provides a power distribution device for implementing the above method, and the power distribution device is configured to perform the method in the foregoing method embodiment. Referring to FIG. 6, FIG. 6 is a schematic diagram showing the logical structure of a power distribution device according to an embodiment of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown. The function module/unit included in the power distribution device of the example of Fig. 6 may be a software module/unit, a hardware module/unit or a combination of hardware and software modules/units, including a proportional calculation module 601 and a judgment processing module 602, where:

 The ratio calculation module 601 is configured to calculate a ratio of a reference signal power to the fixed value when the total transmission power is a fixed value, and a ratio of a user data power of the user Um to the fixed value, where the user Um is connected in the system. Any user of the status;

The determining processing module 602 is configured to calculate, according to the ratio a and the ratio β _Μ calculated by the ratio calculating module 601, whether the energy efficiency of the system is maximum when the total transmitting power is the fixed value, and if yes, obtain the ratio a And the ratio p _m , otherwise updating the total transmission power P _t ;

The ratio calculation module 601 is further configured to calculate the ratio and the ratio of the total transmission power/update, and the determining processing module 602 is further configured to determine whether the energy efficiency of the system is the largest after the total transmission power P _{t is} updated. If yes, the ratio "and ratio" calculated after the total transmission power update is obtained.

In an embodiment of the present invention, the value is the maximum total transmission power of the total transmission power, and the ratio calculation module 601 is configured to calculate the maximum total transmission power when the total transmission power is maximum. The proportion a and the user data power of the user U _m account for the ratio of the maximum total transmission power β _Μ , the determination processing module 602 is configured to calculate the ratio and the ratio according to the ratio calculation module 601, and determine the judgment in the sending Whether the energy efficiency of the system is the largest when the total power is maximum, and if so, the ratio and ratio are obtained, otherwise the total transmission power is updated.

 The judgment processing module 602 of the example of FIG. 6 may further include a judging unit 701, as shown in FIG. 7, a power distribution device according to another embodiment of the present invention, wherein:

The determining unit 701 is configured to determine whether the energy efficiency growth rate of the total transmission power update is set The accuracy is determined, and if so, it is judged that the energy efficiency of the system is maximized after the total transmission power is updated. For example, the setting accuracy is _fl , assuming that the total power is transmitted ^ the energy efficiency of the system before updating; ^, the energy efficiency of the system after the total power is updated is; if (H) _{≤ l} , the energy efficiency growth rate when the total power is updated is judged

The set accuracy is reached. Otherwise, the total transmission power is updated again and it is judged whether the energy efficiency growth rate at the time of the total transmission power/^ is updated to reach the set accuracy _fl .

The example ratio calculation module 601 of FIG. 6 or FIG. 7 is specifically configured to calculate, according to the maximum transmission total power, an ratio of a reference signal power to the maximum transmission total power and a user U _m when the total transmission power is maximum. User data power occupies a ratio β _Μ of the maximum transmission total power, which includes an initial value preset unit 801, a ratio acquisition unit 802, and a ratio determination unit 803, and the power distribution provided by another embodiment of the present invention as shown in FIG. The device is:

 The initial value preset unit 801 is configured to set an initial value of the ratio;

 The ratio obtaining unit 802 is configured to obtain the ratio of the maximum transmitted total power and the initial value, and the expression is specifically:

N _m is the number of subcarriers occupied by the user UTM, P. For the maximum transmitted total power, 7 is the P. The conversion efficiency converted to the final transmission power, ^ is the large-scale channel gain of the user m, the noise power of the user UTM, L _m is the number of resolvable multipaths that the user U _m experiences the channel, and V is the Lagrangian multiplier , V satisfies max(0, ^ _m (v)) = l - a , where M is the number of users in the connected state in the system; and the ratio determining unit 803 is used to set the ratio a of the initial value preset unit 801 The initial value and the acquired relationship satisfy < , and the obtained initial value is

a ratio of the user data power of the user U _m to the maximum transmission total power and a ratio of the reference signal power to the maximum transmission total power, otherwise, updating the value of the ratio, where f ₃ is Experience

The ratio determining unit 803 is further configured to use the ratio according to the formula α _η

Update, the value of „ is the updated value of the ratio, // ₂ is the step size;

The processing module 602 is further configured to use the total transmit power according to the formula / ^ as the updated value of the total transmit power P _f , where

The / ^ is an iteration step.

 The judgment processing module 602 illustrated in FIGS. 6 to 8 includes a partial derivative calculation unit 901 and a determination unit 902, such as the power distribution apparatus provided in another embodiment of the present invention, wherein:

The partial derivative calculation unit 901 is configured to calculate a partial derivative of the energy efficiency function 7 with respect to the total power transmitted, the η is £ g ₂ d+ ₂ H ) , Δ / is the subcarrier bandwidth, and N _m is the user 11 « occupied subcarrier

P _t + P _c

The number of waves, ^ is the sum of circuit loss and static power consumption, 7 is the conversion efficiency of the P _f converted to the final transmit power, is the large-scale channel gain of the user UTM, and is the noise power of the user UTM, L _m For the user U _{m to} experience the number of resolvable multipaths of the channel, M is the number of users in the system in the connected state;

 The determining unit 902 is configured to determine, if the value of the partial derivative obtained by the partial derivative calculation unit 901 is greater than or equal to 0 when the total transmit power is the maximum transmit power, determine the energy efficiency of the system when the total transmit power is maximum maximum.

 The power distribution device illustrated in FIGS. 6 to 9 further includes a precision determination module 1001, such as the power distribution device provided by another embodiment of the present invention, as shown in FIG.

The accuracy judging module 1001 is configured to determine whether the total energy of the transmission/^ update (that is, the total transmit power at the w-1th iteration/^ is updated to the total transmit power at the (0th) iteration) The set accuracy is achieved. For example, by determining whether the establishment, £ ₂ - generally can be set to 10- 1 ⁽⁾ ~ ιο- ^5. If ^dr] ≤ _{2 is} established, the energy efficiency growth rate reaches the set accuracy.

It should be noted that, in the implementation manner of the foregoing power distribution apparatus, the division of each functional module is only an example, and the actual application may be as needed, for example, the configuration requirements of the corresponding hardware or the real software. For the convenience of convenience, the above-mentioned function allocation is completed by different functional modules, that is, the internal structure of the power distribution device is divided into different functional modules to complete all or part of the functions described above. Moreover, in practical applications, the corresponding functional modules in this embodiment may be implemented by corresponding hardware, or may be executed by corresponding hardware. For example, the foregoing proportional calculation module may have the foregoing calculation and transmission. When the total power is maximum, the ratio of the reference signal power to the maximum total transmission power a and the user data power of the user U _{m to} the ratio of the maximum total transmission power β _Μ , such as a proportional calculator, may also be able to perform corresponding The computer program thus completes the foregoing functions of a general processor or other hardware device; and the foregoing determining processing module may have the function of performing the foregoing determination, whether the energy efficiency of the system is maximum when the total transmission power is maximum, and if so, acquiring the ratio And the ratio, otherwise the hardware that updates the function of transmitting the total power, such as the judgment processor, may also be a general processor or other hardware device capable of executing the corresponding computer program to perform the aforementioned functions.

According to the power distribution apparatus provided by the embodiment of the present invention, the embodiment of the present invention considers the power allocation from the ratio of the reference signal power to the maximum transmission total power ratio a and the ratio of the user data power to the maximum transmission total power β _Μ . Different from the prior art, only considering the allocation of user data power, taking into account the case of using the reference signal for channel estimation, the joint design reference signal power and user data power of the present invention can be further reduced on the basis of optimizing the total power. System power consumption. On the other hand, the method provided by the embodiment of the present invention determines whether the energy efficiency of the system is maximum when the total power/^ is a certain value, and the reference signal power and the user are allocated according to the ratio a and the ratio obtained when the energy efficiency of the system is maximum. The data power, therefore, the invention designs the system to transmit the total power from the perspective of optimal energy efficiency and guarantees a certain cell coverage on the basis of the core, which greatly reduces the overall system air interface compared with the traditional method of transmitting the maximum transmission power of the system. Energy consumption, achieving energy efficiency.

Referring to FIG. 11, a schematic diagram of a logical structure of a base station, which can be used in an Orthogonal Frequency Division Multiplexing (OFDM) system, is provided in an embodiment of the present invention. System. For the convenience of description, only parts related to the embodiment of the present invention are shown. The function module/unit included in the base station provided by the example of FIG. 11 may be a software module/unit, a hardware module/unit or a combination of hardware and software modules/units, including a reference signal power configuration module 1102, a user data power configuration module 1103, and a sub-module. The carrier mapping module 1104, the inverse Fourier transform module 1105, the add cyclic prefix module 1106, the digital to analog conversion module 1107, the radio frequency module 1108, and the power distribution device 1101 of any of the examples of FIGS. 6 to 10, wherein:

The power distribution device 1101 is configured to calculate a ratio of a reference signal power to the maximum transmission total power and a ratio of user data power of the user U _m to the maximum transmission total power when the total transmission power is maximum, according to the ratio and the ratio Determining whether the energy efficiency of the system is the largest when the total transmission power is maximum, and if yes, acquiring the ratio and the ratio, otherwise updating the total transmission power to calculate the ratio and the ratio β after updating the total transmission power P _t , Determining whether the energy efficiency of the system after the total transmission power is updated is the largest, and if yes, obtaining the ratio and proportion calculated after the total transmission power/^ update;

 The reference signal power configuration module 1102 is configured to allocate the reference signal power to the coded modulated reference signal according to the ratio of the reference signal power calculated by the power distribution device 1101 to the maximum total transmission power.

The user data power configuration module 1103 is configured to configure the user data power to the encoded and modulated user data according to the ratio β _Μ of the user data power calculated by the power distribution device 1101 to the maximum total transmission power;

 a subcarrier mapping module 1104, configured to map the configured reference signal and user data to the subcarriers;

 An inverse Fourier transform module 1105 is configured to perform inverse Fourier transform on the data mapped by the subcarrier mapping module 1104.

 The cyclic prefix module 1106 is configured to perform the cyclic prefix (CP, Cyclic Prefix) processing on the data transformed by the inverse Fourier transform module 1105.

a digital-to-analog conversion module 1107, configured to convert the digital signal output by the cyclic prefix prefix module 1106 into an analog signal; The radio frequency module 1108 is configured to: the analog signal output by the digital-to-analog conversion module 1107 is amplified by a power amplifier, and the amplitude of the transmitted analog signal is adjusted according to the total transmission power obtained by the power distribution device 1101, and then transmitted through the radio frequency antenna.

 Referring to FIG. 12, a schematic diagram of a logical structure of a power distribution apparatus according to an embodiment of the present invention is shown. For the convenience of description, only parts related to the embodiment of the present invention are shown. The function module/unit included in the power distribution device provided by the example of FIG. 12 may be a software module/unit, a hardware module/unit or a combination of hardware and software modules/units, including a first acquisition module 1202, a second acquisition module 1202 and a The three acquisition module 1203, wherein:

The first obtaining module 1201 is configured to acquire a total transmit power P _f when the energy efficiency of the system is maximum, a ratio a when the reference signal power accounts for the total transmit power/^, and a user data power of the user U _m . The ratio β _Μ when the total power P _f is fixed;

The second obtaining module 1202 is configured to: when the product of the P _f , and ? is greater than or equal to the minimum value of the reference signal power, the ratio and the ratio acquired by the first acquiring module 1201 are used as the reference a ratio of signal power to the user data power, said conversion being the conversion efficiency of the final transmission power;

The third obtaining module 1203 is configured to: if the product of the ?, and the sum does not satisfy a condition that is greater than or equal to a minimum value of the reference signal power / ^, then the reference signal power is equal to the ^ ^ to obtain the total power transmission when the power of the reference signal value representing a ratio of the value of Um and the user account of the user data power ratio value e _m.

In an embodiment of the present invention, the value is the maximum total transmit power of the total transmit power. At this time, the first acquisition module 1201 is configured to acquire the total transmit power reference signal power when the system has the highest energy efficiency. The ratio of the maximum transmission total power a and the user data power of the user U _m to the maximum transmission total power, the third obtaining module 1203 is configured to: if the product of the sum and the sum does not satisfy the greater than or equal to the a condition of a minimum value of reference signal power / ^, a ratio of the reference signal power to the fixed value when the fixed signal power is reacquired under the condition that the reference signal power is equal to the / ^ The ratio of the user data power of the user Um to the fixed value is: if the product of the ?, P _f and the sum does not satisfy the condition that is greater than or equal to the minimum value of the reference signal power, then the reference is The signal power is equal to the condition of the ^ Obtaining a ratio of the reference signal power to the maximum transmission total power when the total transmission power is maximum, and a ratio of the user data power of the user U _m to the maximum transmission total power β _Μ .

 The first acquisition module 1201 illustrated in FIG. 12 includes a first ratio calculation sub-module 1301 and a first determination processing sub-module 1302, such as the power distribution apparatus provided by another embodiment of the present invention, as shown in FIG.

A first user data power ratio calculation sub-module 1301 for calculating a ratio of the total power transmission and the user account U _m maximum total transmit power is the maximum power of the reference signal representing the total maximum transmission power ratio, the user Um is any user in the connected state within the system;

 The first determination processing sub-module 1302 is configured to calculate, according to the first ratio calculation sub-module 1301, a ratio “and a ratio, determine whether the energy efficiency of the system is maximum when the total transmission power is maximum, and if yes, obtain the ratio and Proportion, otherwise update the total transmit power

The first ratio calculating sub-module 1301 is further configured to calculate the ratio and the ratio p _m after the sending total power update, and the first determining processing sub-module 1302 is further configured to determine the total sending power/^ after updating. Whether the energy efficiency of the system is the largest, and if so, the ratio and proportion calculated after the total power transmission is updated.

 The first determination processing sub-module 1302 of the example of FIG. 13 includes a first determining unit 1401, such as the power distribution apparatus provided by another embodiment of the present invention, as shown in FIG.

 The first determining unit 1401 is configured to determine whether the energy efficiency growth rate of the total transmission power update reaches the set accuracy, and if yes, determine that the energy efficiency of the system is maximized after the total transmission power is updated.

 The third obtaining module 1203 illustrated in FIGS. 12 to 14 includes a third ratio calculating sub-module 1501 and a third judging processing sub-module 1502, as shown in FIG. 15, a power distribution device according to another embodiment of the present invention, wherein :

A third user data power ratio calculation sub-module 1501, user data for the maximum sum of the power P _p Um user computing a plurality of user accounts for the / ^ is the ratio of the maximum / ^. Transmitting the total power for the maximum;

The third determination processing sub-module 1502 is configured to determine, according to the calculated ratio y _m calculated by the third ratio calculation sub-module 1501, that the energy efficiency of the system is greater when the sum of the user data powers of the plurality of users is maximum No, if yes, the ratio and ratio are obtained according to the method, otherwise the /^ is updated and it is determined whether the energy efficiency of the system after the update is maximum.

 The third obtaining module 1203 illustrated in FIGS. 12 to 15 further includes an energy efficiency determining sub-module 1601, such as the power distribution device provided by another embodiment of the present invention shown in FIG. 16, wherein:

 The energy efficiency judging sub-module 1601 is configured to determine whether the energy-efficiency growth rate at the time of the update reaches a set precision, and if yes, determine that the energy efficiency of the system is maximized after the update and update.

 The third ratio calculation sub-module 1501 illustrated in FIG. 15 or FIG. 16 further includes a variable replacement unit.

1701 and a ratio calculation unit 1702, as shown in FIG. 17, a power distribution apparatus according to another embodiment of the present invention, wherein:

The variable replacement unit 1701 is used by the relation = Ρ. - ^ /? And ^ = β _η Ρ ₀ / ( ₀ - P p) replace ^ = (1+ /^ ?);

 The ratio calculation unit 1702 is configured to calculate, according to the ratio of the user data power of the user 1^ obtained by the maximum energy efficiency of the system to the maximum total transmission power,

 The third determination processing sub-module 1502 illustrated in Fig. 15 or Fig. 16 further includes a partial derivative calculation unit 1801 and a determination unit 1802, as shown in Fig. 18, which is a power distribution device according to another embodiment of the present invention, wherein:

The partial derivative calculation unit 1801 is configured to calculate a partial derivative of the energy efficiency function 7 with respect to the ^, where 7 is V AfN _m log ₂ (1 + Ρ ^Ρ αΨΜ _ )

^ (pL _m 7 _m P _fi + N _m P _a ) , where Δ/ is the subcarrier bandwidth and N _m is the user 1^

P _p + P _c + P _a lp

Using the number of subcarriers, ^ is the sum of the circuit loss and the static power consumption, ^ is the large-scale channel gain of the user u _m , is the noise power of the user 1 , and L _m is the number of resolvable multipaths experienced by the user U _m through the channel , M is the number of connected users in the system;

The determining unit 1802 is configured to determine, when the partial derivative is the maximum sum of the user data powers of the plurality of users, or the value after the /^ update is greater than or equal to 0, determine the number of users in the multiple users The system has the highest energy efficiency according to the sum of the powers Ρ _β max.

 The power distribution device of any of the examples of Figures 15 to 18 further includes a precision determination module 1901, such as the power distribution device of another embodiment of the present invention shown in Figure 18, wherein:

 The accuracy judging module 1901 is configured to determine whether the sum of the user data powers of the plurality of users is updated, and whether the energy growth rate reaches the set accuracy. The power distribution device according to the embodiment of the present invention, as shown in the above-mentioned FIG. 12 to FIG. 19, can be considered that the ratio of the reference signal power to the maximum total transmission power and the ratio of the user data power to the maximum transmission total power are considered in the embodiment of the present invention. Power allocation, in this way, different from the prior art, only considering the allocation of user data power, taking into account the case of using the reference signal for channel estimation, the joint design reference signal power and user data power of the present invention can optimize the total power. Further reduce system power consumption. On the other hand, the method provided by the embodiment of the present invention is to determine the total power transmitted.

When the P _t is a certain value, the energy efficiency of the system is the largest, and the reference signal power and the user data power are allocated according to the ratio a and the ratio obtained when the energy efficiency of the system is maximum. Therefore, the present invention designs the system to transmit the total power from the perspective of optimal energy efficiency. And ensuring a certain cell coverage on the basis of this foundation, compared with the traditional method of transmitting the maximum transmission power of the system, the overall energy consumption of the system air interface is greatly reduced, and energy saving is realized.

 Referring to FIG. 20, a schematic diagram of a logical structure of a base station according to another embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown. The function module/unit included in the base station provided by the example of FIG. 20 may be a software module/unit, a hardware module/unit or a combination of hardware and software modules/units, including a reference signal power configuration module 2002, a user data power configuration module 2003, a sub- A power distribution device 2001 of any one of the carrier mapping module 2004, the inverse Fourier transform module 2005, the cyclic prefix module 2006, the digital to analog conversion module 2007, the radio frequency module 2008, and the accompanying drawings 12 to 19, wherein:

The power distribution device 2001 is configured to calculate a ratio of the reference signal power to the maximum transmission total power a when the total transmission power P _{t is} maximum, and a ratio of user data power of the user U _m to the maximum transmission total power, according to the ratio And the ratio, determining the energy of the system when the total transmission power is maximum Whether the effect is the largest, if yes, the ratio and the ratio are obtained, otherwise the total transmission power is updated to calculate the ratio and the ratio β after the total transmission power P _{t is} updated, and it is determined whether the energy efficiency of the system after the total transmission power is updated Maximum, if yes, obtain the ratio and proportion calculated after the total transmission power / ^ update;

 The reference signal power configuration module 2002 is configured to allocate the reference signal power to the coded modulated reference signal according to the ratio of the reference signal power calculated by the power distribution device 2001 to the maximum total transmission power.

The user data power configuration module 2003 is configured to configure the user data power to the encoded and modulated user data according to the ratio β _Μ of the user data power calculated by the power distribution device 2001 to the maximum total transmission power;

 a subcarrier mapping module 2004, configured to map the configured reference signal and user data to the subcarriers;

 An inverse Fourier transform module 2005, configured to perform inverse Fourier transform on the data mapped by the subcarrier mapping module 2004;

 And adding a cyclic prefix module 2006, configured to perform a cyclic prefix (CP, Cyclic Prefix) process on the data transformed by the inverse Fourier transform module 2005;

 a digital-to-analog conversion module 2007, configured to convert the digital signal output by the cyclic prefix module 2006 into an analog signal;

 The RF module 2008 is configured to: the analog signal output by the digital-to-analog conversion module 2007 is amplified by a power amplifier, and the amplitude of the transmitted analog signal is adjusted according to the total transmission power obtained by the power distribution device 2001, and then transmitted through the RF antenna.

 It should be noted that the information interaction, the execution process, and the like between the modules/units of the foregoing device are the same as the embodiment of the method of the present invention. Reference is made to the description in the method embodiment of the present invention, and details are not described herein again.

A person skilled in the art may understand that all or part of the various steps of the foregoing embodiments may be completed by a program instructing related hardware. The program may be stored in a computer readable storage medium, and the storage medium may include: Read only memory (ROM, Read Only Memory), Random Access Memory (RAM), disk or optical disk.

 The power distribution method and device and a base station provided by the embodiments of the present invention are described in detail. The principles and implementations of the present invention are described in the following. The description of the foregoing embodiments is only for helping. The method of the present invention and its core idea are understood; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scopes. It should be understood that the invention is limited.

Claims

Rights request

A power distribution method, the method comprising:

Calculating a ratio β of the reference signal power to the fixed value when the total transmission power is a fixed value and a ratio β _Μ of the user data power of the user U _m to the predetermined value, where the user U _m is in the connected state in the system. One user

Determining, according to the ratio and the ratio β _Μ , whether the energy efficiency of the system is the maximum when the total transmission power/^ is the fixed value, and if yes, acquiring the ratio “and the ratio otherwise, updating the total transmission power/^

Calculating the ratio and the ratio β _Μ after the updated total transmission power P _{t is} updated, determining whether the energy efficiency of the system after the total transmission power/update is maximum, and if yes, obtaining the ratio calculated after the total transmission power is updated. proportion.

The method according to claim 1, wherein the value is a maximum transmission total power of the total transmission power P _f ;

The ratio of the reference signal power to the fixed value when the total transmit power P _f is a fixed value is calculated as “the ratio of the user data power of the user 1 ^ to the fixed value is: calculating the total transmit power / ^ maximum reference signal a ratio of power to the maximum total transmission power a and a ratio of user data power of the user U _m to the maximum total transmission power;

 According to the ratio and the ratio, it is determined whether the energy efficiency of the system is the maximum when the total power is transmitted / ^ the fixed value: ^^ according to the ratio "and the ratio, determining that the total transmission power is the largest When the system is most energy efficient.

 The method according to claim 2, wherein the determining whether the energy efficiency of the system after the sending total power/^ update is maximum comprises:

It is judged whether the energy efficiency growth rate of the total transmission power update reaches the set accuracy, and if so, it is determined that the energy efficiency of the system reaches the maximum after the total transmission power P _{t is} updated.

The method according to claim 2, wherein the calculating the ratio of the reference signal power to the maximum total transmission power and the user data power of the user U _m when the total transmission power is maximum accounts for the maximum transmission total The ratio of the power is: according to the maximum total transmission power, an iterative search is used to calculate the ratio of the reference signal power to the maximum total transmission power when the total transmission power is maximum. The ratio of the user data power of the U _m to the maximum total transmission power is β _Μ , and the iterative search is used to calculate the ratio of the reference signal power to the maximum total transmission power and the user data power of the user 1 ^ when the total transmission power is maximum representing the maximum transmission power ratio of the total _β Μ comprising:

 Setting the initial value of the ratio a;

 Obtaining the expression of the ratio by the maximum transmitted total power and the initial value,

N _m is the number of subcarriers occupied by the user UTM, P. For the maximum transmitted total power, 7 is the P. Converting to the conversion efficiency of the final transmit power, ^ is the large-scale channel gain of the user UTM, the noise power of the user UTM, L _m is the number of resolvable multipaths experienced by the user U _m , and V is the Lagrangian multiplication Child, V satisfies 3⁄4 quantity;

< _ε , then β _η obtained at this time

The ratio of the maximum transmitted total power and the ratio of the reference signal power to the maximum transmitted total power, otherwise, updating the value of the ratio, the £ ₃ being an empirical value.

5. The method according to claim 4, characterized in that said updating said value of said ratio is: said ratio is according to the formula " _{= a} - _{u (a} - 吏 new, said „ is said ratio

The updated value, // ₂ is the step size.

 The method according to claim 3, wherein the determining whether the energy-efficiency growth rate of the total transmission power/^ update reaches the set accuracy further comprises:

It is judged whether the energy efficiency increase speed when the total transmission power P _{t is} updated reaches the set accuracy.

 The method according to claim 2, wherein said determining, according to said ratio and ratio, whether the energy efficiency of the system at the time of said total transmission power/max is maximum:

Partial derivative, the 7 is

, N _m is the user 11 « occupied sub-load

P _t + P _c

The number of waves, ^ is the sum of the circuit loss and the static power consumption, and the conversion of the P _f to the final transmission power Conversion efficiency, the large-scale channel gain for the user UTM, the noise power of the user UTM, L _m is the user

U _m experiences the number of resolvable multipaths of the channel, and M is the number of users in the connected state in the system;

 If the partial derivative is greater than or equal to the value of the total transmit power / ^ is the maximum transmit total power

0, it is judged that the system has the highest energy efficiency when the total transmission power P _t is maximum.

The method according to claim 2, wherein the updating the total transmission power/^ or updating the total transmission power _Pt is:

Transmitting the total transmitted power according to the formula Ρ _η = Ρ _η . _γ + μ _χ - updating, the transmitting dP _t

The total power updated value, the / ^ is the value before the transmission total power update, and the A is an iteration step.

 9. A power distribution method, the method comprising:

Obtaining the total power of the system when the energy efficiency of the system is maximum, the ratio of the reference signal power to the total value of the total transmission power, and the user data power of the user U _m occupying the total value of the transmission power/^ proportion;

If the product of ?, /^, and "P _t a is greater than or equal to the minimum value of the reference signal power, then the ratio and the ratio are used as the ratio of the reference signal power to the user data power. The ? is the conversion efficiency of the conversion to the final transmission power;

If the product of ?, /^ and ? P _t a does not satisfy the condition that the value of the reference signal power is at least / ^, then re-acquired under the condition that the reference signal power is equal to the / ^ The ratio of the reference signal power to the predetermined value a and the ratio of the user data power of the user Um to the predetermined value when the total power is transmitted is β _Μ .

 10. The method of claim 9, wherein the fixed value is a maximum transmitted total power of the total transmitted power;

The ratio of the total power reference signal power when the energy efficiency of the acquisition system is the largest, the ratio of the total transmission power to the fixed value, and the user data power of the user U _m , when the total transmission power is the fixed value, is : the ratio of the total transmit power when the energy efficiency of the system is maximized, the ratio of the reference signal power to the maximum total transmit power, and the ratio of the user data power of the user U _m to the maximum transmit total power. If the product P _t α of the sum and the sum does not satisfy a condition that is greater than or equal to a minimum value / ^ of the reference signal power, re-acquiring the total transmission under the condition that the reference signal power is equal to the / ^ The ratio of the reference signal power to the fixed value when the power is fixed is "the ratio of the user data power of the user Um to the fixed value is: if the product of ? and " does not satisfy greater than or a condition equal to a minimum value of the reference signal power / ^, and the reference signal power occupies the maximum total transmission power when the total power of the transmission is re-acquired under the condition that the reference signal power is equal to the /^ The proportion of the user data power of the ratio a and the user U _m to the maximum total transmission power.

The method according to claim 9, wherein the total transmission power P _f when the energy efficiency of the acquisition system is maximum, the ratio a of the reference signal power to the maximum transmission total power, and the user data of the user U _m The ratio of power to the maximum transmitted total power includes:

Calculating a ratio of the reference signal power to the maximum total transmission power when the total transmission power is maximum, and a ratio of user data power of the user U _m to the maximum total transmission power β _Μ , the user u _m is in a connected state in the system Any user;

Determining, according to the ratio a and the ratio β _Μ , whether the energy efficiency of the system is the largest when the total power of transmission/^ is maximum, and if yes, acquiring the ratio “and ratio, otherwise updating the total transmission power”

 Calculating the proportion and proportion of the total transmission power after updating, determining whether the energy efficiency of the system after the total transmission power is updated is the largest, and if yes, obtaining the ratio and proportion of the total transmission power after updating.

The method according to claim 10, wherein the reference signal power occupies the maximum transmit total power when the total transmit power is re-acquired under the condition that the reference signal power is equal to the ^ The proportion of the user data power of the ratio a and the user U _m to the maximum total transmission power includes:

Calculating the ratio of the user data power of the user Um when the sum of the user data powers of the plurality of users is _最大β is the ratio of the /^, and the maximum is the Ρ. Transmitting the total power for the maximum;

Determining, according to the ratio y _m , whether the energy efficiency of the system is the largest when the sum of the user data powers of the plurality of users is maximal, and if so, determining the ratio according to the ratio "and the ratio, otherwise updating the Ρ _β and judge whether the energy efficiency of the system after the Ρ _β update is the largest.

The method according to claim 12, wherein the determining whether the energy efficiency of the updated system is maximum comprises:

 It is judged whether the energy efficiency growth rate at the time of the /^ update reaches the set accuracy, and if so, it is judged that the energy efficiency of the system is maximized after the update and update.

14. The method as claimed in claim 12, wherein said plurality of user computing power of user data _Ρ β maximum sum Um user account of the user data power ratio y _m comprising:

By relation = -^/? And } =Α„Ρ./0Ρ.- Replace Y _m = P _m + P _a IPW, according to the user's data power obtained by the user U _m when the energy efficiency of the system is the largest, the maximum total transmission power

The method according to claim 12, wherein, according to the ratio, determining whether the energy efficiency of the system is maximum when the sum of user data powers Ρ _{β of} the plurality of users is maximum comprises: calculating an energy efficiency function 7 Regarding the partial derivative of / ^, the

Where Δ/ is the subcarrier bandwidth and N _m is the user U _m occupant

The sum of the carrier number and the static power consumption is the large-scale channel gain of the user U _m , which is the noise power of the user 0 « , ^ is the number of resolvable multipaths that the user Um experiences the channel, and M is the user in the connected state in the system. If the partial derivative is greater than or equal to 0 when the sum of the user data powers of the plurality of users is greater than or equal to 0, determining that the system ρ _{β is} maximum when the user data powers of the plurality of users are maximum The most energy efficient.

 The method according to claim 12, wherein the updating the sum of user data powers of the plurality of users is:

The ^{value is} updated according to the formula Ρ _η = Ρ _η . + ^άη , the / ^ is the value after the /^ update, the / ^ is the value before the /^ update, and the ϊ3⁄4ί- is the iteration step size .

 The method according to claim 13, wherein the determining whether the energy efficiency growth rate at the time of the update reaches the set accuracy further comprises:

It is determined whether the sum of the user data powers of the plurality of users is updated to achieve a set accuracy.

18. A power distribution device, the device comprising:

a ratio calculation module, configured to calculate a ratio of a reference signal power to the predetermined value when the total transmit power P _f is a fixed value (and a ratio of user data power of the user Um to the fixed value, where the user Um is in the system Any user of the connection status;

Determining a processing module for the resulting ratio "and ratio β is calculated according to the proportion calculation module _[mu], determines the total transmission power in the energy efficiency of the system if the fixed maximum value, if yes, obtaining a ratio and the ratio p _m , otherwise updating the total transmit power P _t ;

The ratio calculation module is further configured to calculate the ratio and the ratio β _Μ after the sending total power update, and the determining processing module is further configured to determine whether the energy efficiency of the system is the largest after the sending total power P _{t is} updated, and if so, Then, the ratio “sum ratio” calculated after the total transmission power update is obtained.

 19. The apparatus according to claim 18, wherein the value is a maximum transmission total power of the total transmission power;

The ratio calculation module is configured to calculate a ratio of a reference power of the total transmit power to the maximum transmit total power and a ratio of user data power of the user U _m to the maximum transmit total power;

The determining processing module is configured to determine, according to the ratio a and the ratio p _m calculated by the ratio calculating module, whether the energy efficiency of the system is maximum when the total transmitting power is maximum, and if yes, obtain the ratio a and the ratio p _m , otherwise update the total transmit power P _t .

 The device of claim 19, wherein the determining processing module comprises: a determining unit, configured to determine whether the energy efficiency growth rate of the total power transmission update reaches a set accuracy, and if so, determine the location The energy efficiency of the system is maximized after the total power transmission is updated.

The device according to claim 19, wherein the ratio calculation module is configured to calculate, according to the maximum total transmit power, an iterative search, when the total transmit power is maximum, the reference signal power accounts for the maximum transmit total power. The ratio of the user data power of the ratio a and the user U _m to the maximum total transmission power, the ratio calculation module includes:

 An initial value preset unit for setting an initial value of the ratio;

The ratio obtaining unit, configured to obtain the ratio by the maximum transmitted total power and the initial value, is specifically:

N _m is the number of subcarriers occupied by the user UTM, P. For the maximum transmit total power, ? is the P. The conversion efficiency converted to the final transmission power is the large-scale channel gain of the user m, the noise power of the user UTM, L _m is the number of resolvable multipaths that the user U _m experiences the channel, and V is the Lagrangian multiplier. V satisfies 3⁄4 max(0, ^ _m (v)) = l - a , where M is the number of users in the connected state in the system; a ratio determining unit is used to determine the relationship between the initial value and the obtained p _m

And taking the initial value obtained at this time as the ratio of the user data power of the user Um to the maximum transmission total power and the ratio of the reference signal power to the maximum transmission total power, otherwise, updating The value of the ratio, the £ ₃ is an empirical value.

 22. The apparatus according to claim 19, wherein the ratio determining unit is further configured to

^^ update, the update for the ratio

Ν "

The new value, the A is the iteration step size.

 The device of claim 20, wherein the device further comprises:

The accuracy judging module is configured to judge whether the energy-efficiency growth speed of the total transmission power P _{t is} updated to a set accuracy.

The apparatus according to claim 19, wherein the determining processing module comprises: a partial derivative for transmitting total power /^, wherein; is a subcarrier; a skin bandwidth, and _Nm is a user 1^ occupant Carrier

For the conversion efficiency of the final transmission power, the large-scale channel gain of the user UTM, the noise power of the user UTM, L _m is the user U _m experiences the number of resolvable multipaths of the channel, M is the number of users in the connected state in the system; and the judging unit is configured to: if the partial derivative of the partial derivation calculation unit is calculated, when the total transmit power is the maximum transmit total power If the value is greater than or equal to 0, it is judged that the system has the highest energy efficiency when the total transmission power / ^ is maximum.

 A base station, characterized in that the base station comprises the power distribution device according to any one of claims 19 to 24.

 26. A power distribution device, the device comprising:

A first acquiring module, for acquiring the energy efficiency of the transmission system, the total power maximum, the reference signal power representing the total power transmission / ^ the transmission ratio of a total power and when the user U _m value representing user data power The ratio at which the value is fixed;

 a second obtaining module, configured to allocate, according to a ratio of the sum of the reference signal and the power of the reference signal, a ratio of the reference signal power to the user data power, The ? is the conversion efficiency of the conversion to the final transmission power;

a third obtaining module, configured to: if the product of the ?, and the sum does not satisfy a condition that is greater than or equal to a minimum value of the reference signal power, re-acquire under the condition that the reference signal power is equal to the /^ The ratio of the reference signal power to the fixed value a and the ratio of the user data power of the user Um to the fixed value when the total power is transmitted is β _Μ .

 27. The apparatus according to claim 26, wherein the fixed value is a maximum transmission total power of the total transmission power;

 The first acquiring module is configured to acquire a total transmission power when the energy efficiency of the system is maximum, a ratio a of the reference signal power to the maximum total transmission power, and a ratio of the user data power of the user 1^ to the maximum total transmission power;

The third obtaining module is configured to: if the product of ? and , ? P _t a does not satisfy a condition that is greater than or equal to a minimum value of the reference signal power, if the reference signal power is equal to the condition Retrieving the total power transmitted ^ The ratio of the reference signal power to the fixed value and the ratio of the user data power of the user Um to the fixed value are: if the product of ?, and a ? P _t a is greater than or does not satisfy the minimum / ^ this condition is equal to the reference signal power, the When the maximum total transmission power reacquire the reference signal at a power equal to said / ^ of the reference signal representing the maximum transmission power ratio of _a total power and the user data of the user U _m, the maximum power accounted The ratio of total power sent is β _Μ .

The device according to claim 27, wherein the first obtaining module comprises: a first ratio calculating submodule, configured to calculate a ratio of a reference signal power to a maximum total transmitting power when the total transmitting power is maximum And the ratio of the user data power of the user U _m to the maximum total transmission power, where the user Um is any user in the connected state in the system;

 a first determining processing sub-module, configured to calculate a ratio a and a ratio calculated by the sub-module according to the first ratio, and determine whether the energy efficiency of the system is maximum when the total transmitting power is maximum, and if yes, obtain the ratio and the ratio, Otherwise update the total transmit power

The first ratio calculation sub-module is further configured to calculate the ratio a and the ratio β _Μ after the sending total power update, and the first determining processing sub-module is further configured to determine the total power/update system after the sending Whether the energy efficiency is the largest, and if so, the ratio and the ratio calculated after the total transmission power update is obtained.

 The apparatus according to claim 28, wherein the first determining processing submodule comprises:

The first determining unit is configured to determine whether the energy efficiency growth rate of the total transmission power P _{t is} updated to a set accuracy, and if yes, determine that the energy efficiency of the system is maximized after the total transmission power is updated.

 The apparatus according to claim 28, wherein the third obtaining module comprises: a third ratio calculating sub-module, configured to calculate user data power of the user Um when the sum of the user data powers of the plurality of users is maximum The maximum is Ρ in the ratio of the /^. - / 7, , said Ρ. Transmitting the total power for the maximum;

a third determining processing submodule, configured to calculate a ratio γ _η calculated by the sub-module according to the third ratio, and determine whether the energy efficiency of the system is maximum when the sum of the user data powers ρ _{β of} the plurality of users is maximum, and if yes, And determining the ratio and proportion according to the method, otherwise updating the method and determining whether the energy efficiency of the updated system is the largest.

The device according to claim 30, wherein the third obtaining module further comprises: an energy efficiency determining sub-module, configured to determine whether the energy-efficiency growth rate of the update reaches a set precision Degree, if yes, determine that the energy efficiency of the system is maximized after the update is updated.

 32. The apparatus of claim 30, wherein the third ratio calculation sub-module comprises:

The variable replacement unit is used by the relation = Ρ. - /^ /? And ^ =ΑΛ /ΟΡ. - replacing the ratio calculation unit, which is used to calculate the ratio of the user data power of the user u _m obtained when the energy efficiency of the system is maximum to the maximum total transmission power

33. The apparatus according to claim 30, wherein the third determining processing submodule comprises:

Effect function; regarding the partial derivative, the

, where Δ/ is the subcarrier bandwidth, and N _m is the user 1^

Ρ _β + Ρ _ε + Ρ _α / ρ

Using the number of subcarriers, ^ is the sum of the circuit loss and the static power consumption, ^ is the large-scale channel gain of the user U _m , is the noise power of the user 1 , and L _m is the number of resolvable multipaths experienced by the user U _m through the channel , M is the number of connected users in the system;

Determination means for, if the partial derivative maximum when the plurality of users and user data _Ρ β, or powers of the / ^ updated value is greater than or equal to 0, it is determined that the user of the plurality of users The system has the highest energy efficiency when the sum of data powers Ρ _β is maximum.

The device according to claim 29, wherein the device further comprises: a precision determining module, configured to determine whether a sum of user data powers of the plurality of users Ρ _{β is} updated when the energy efficiency growth rate reaches a setting Precision.

 A base station, characterized in that the base station comprises the power distribution device according to any one of claims 26 to 34.