WO2011097917A1

WO2011097917A1 - Method and device for controlling power

Info

Publication number: WO2011097917A1
Application number: PCT/CN2010/079691
Authority: WO
Inventors: 冯淑兰; 刘劲楠
Original assignee: 华为技术有限公司
Priority date: 2010-02-09
Filing date: 2010-12-13
Publication date: 2011-08-18
Also published as: CN102149179B; CN102149179A

Abstract

A method and device for controlling power are provided, and belong to the communication technique field. The method includes the following steps: original transmission power of multiple channels corresponding to a power amplifier is obtained; when the summation of the original transmission power of the multiple channels is larger than the maximal transmission power of the power amplifier, the transmission power of at least one channel with the lowest priority among the multiple channels is reduced; after the transmission power of one channel is reduced, if the transmission power difference between the channel and other channels of the multiple channels is larger than the preset threshold A, or if the transmission power spectrum density difference between the channel and other channels of the multiple channels is larger than the preset threshold B, then the channel is closed. With this technique scheme, the performance loss caused by nonlinearity of the power amplifier can be reduced, and the data transmission performance can be improved.

Description

Power control method and device

The present application claims priority to Chinese Patent Application No. 201010112276.0, entitled "A Power Control Method and Apparatus", filed on February 9, 2010, the entire disclosure of which is incorporated herein by reference. .

Technical field

The present invention relates to the field of communications technologies, and in particular, to a power control method and apparatus.

Background technique

In the communication system, in order to improve the quality of the communication system and reduce the interference to surrounding users, the power of the transmitted signal should be controlled, and the communication with a relatively short communication distance can adopt a relatively low transmission power, and the communication with a long communication distance can be used. Use a relatively high transmit power, but the transmit power cannot exceed a certain predefined maximum transmit power. If data transmission of multiple links is carried on a PA (Power Amplifier), the total transmit power of each link cannot exceed the predefined maximum transmit power. The 3GPP (3rd Generation Partnership) LTE (Long Term Evolution) is used as an example. The ith subframe of the UE (User Equipment) transmits the transmit power of the Physical Uplmk Shared Channel (PUSCH).计算 Use the following formula to calculate: 尸_Η ('·) = min{P _CMAX , 101og ₁₀ (M _H ( )) + ₀ — Hidden + - PL+ Α _Ίΐ (ί) +/(ί)};

The transmit power of the PUCCH (Physical Uplink Control Channel) of the UE is calculated by the following equation:

^PUCCH ( ~ ^m i ⁿ tcMAx, corpse O_PUCCH + PL + h {n _CQ1 , n _HARQ ) + Δ _F _ _PUCCH F) - - g ( )} ,

P _CMAX is the maximum transmit power of the UE; M (the number of PRBs (Physical Resource Blocks) allocated to the PUSCH for transmission; P. _PUSCH ( ), P. _PUCCH are respectively semi-statically set power reference values, Different values can be set for different uplink transmission data packets; ) indicating the amount of compensation for path loss, indicated by higher layer signaling; is the downlink path loss calculated by the terminal; Δ _{Ρ ρ υ α3 Η} ^), /ι (·) respectively Represents power compensation for different PUCCH formats; A _TF (i) is a The offset corresponding to the coding rate and the modulation mode indicates whether power compensation is performed for different modulation modes and code rates; /(0, g(0 is the power adjustment amount obtained by the base station power control command. Thus, when When the power calculated by the PUCCH or the PUSCH according to the power control command exceeds the maximum transmit power of the device, the actual transmit power of the PUCCH or the PUSCH will be the maximum transmit power of the device. The channel transmit power calculated by the device according to the power control command is called the calculated transmit power. .

In LTE, a power amplifier has only one channel transmitting at the same time, or is a PUCCH, or a PUSCH. As long as the calculated transmit power of the PUCCH or the PUSCH does not exceed the maximum transmit power of the UE, the calculated transmit power of the PUCCH or the PUSCH is used for data transmission. . However, in LTE-A (LTE-Advance, Evolution of LTE), a power amplifier may support data transmission for multiple channels. For example, one power amplifier may support simultaneous transmission of PUCCH and PUSCH, or support transmission of two non-contiguous PUSCHs of the same band and different carriers. In this case, the total calculated transmit power of all channels corresponding to one PA and the maximum transmit power of the PA cannot be exceeded. In practical applications, since each channel independently performs its own power control, the sum of the calculated transmit powers of all channels is likely to exceed the maximum transmit power of the PA, so the transmit power of one or more channels is reduced to make multiple channels. The transmit power does not exceed the maximum transmit power of the PA.

Reducing the power of one or more channels may result in a large difference in transmit power between different channels, which may exceed the linear operating range of the PA and may cause linear distortion.

Summary of the invention

According to an embodiment of the invention, a power control method is provided, including:

Obtaining initial transmission power of multiple channels corresponding to the power amplifier;

Transmitting a transmit power of at least one of the plurality of channels having the lowest priority when a sum of initial transmit powers of the plurality of channels exceeds a maximum transmit power of the power amplifier;

If the difference between the transmit power of one channel and the other channels of the plurality of channels after the transmission power is reduced is greater than the preset threshold A, or if the difference between the transmit power spectral density of the other channels in the plurality of channels is greater than the difference When the threshold is set to B, the channel is closed. According to still another embodiment of the present invention, a user equipment is provided, including:

An acquiring unit, configured to acquire initial transmit power of multiple channels corresponding to the power amplifier; and an adjusting unit, configured to: when the sum of initial transmit powers of the multiple channels exceeds a maximum transmit power of the power amplifier, Transmitting the transmit power of at least one of the plurality of channels having the lowest priority;

a shut down unit, configured to: if a channel reduces the transmit power and the difference between the transmit powers of the other channels in the plurality of channels is greater than a preset threshold A, or if the channel reduces the transmit power and transmits power to other channels of the plurality of channels If the difference in spectral density is greater than the preset threshold B, the channel is turned off.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic diagram of a power control method according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a channel transmission power adjustment process according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a user equipment according to an embodiment of the present invention.

detailed description

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 creative work are within the scope of the present invention.

FIG. 1 is a schematic diagram of a power control method according to an embodiment of the present invention, where the method includes: S11: acquiring initial transmit powers of multiple channels corresponding to a power amplifier;

S12: When a sum of initial transmission powers of the multiple channels exceeds a maximum transmission of the power amplifier Transmitting power, reducing a transmission power of at least one of the plurality of channels having the lowest priority;

S13: If the difference between the transmit power of the channel and the transmit power of the other channel or the transmit power spectral density after the transmission power is reduced is greater than the preset threshold, the channel is turned off.

In this embodiment, the initial transmit power of multiple channels corresponding to the PA is compared. When the initial transmit power of multiple channels exceeds the maximum transmit power of the PA, the transmit power of one or more channels with the lowest priority among the multiple channels may be reduced. To achieve power control, if a channel with a low P transmit power is compared with other channels, the difference between the transmit power difference or the transmit power density is greater than a predetermined threshold, the channel can be turned off to prevent transmission between different channels. The power difference is too large to cause a problem of nonlinear loss of the PA, thereby improving data transmission performance. The initial transmit power of the channel in this embodiment may be calculated according to a power control command, which is also referred to as a calculated transmit power of the channel.

Optionally, when the transmit power of the channel with the highest priority among the multiple channels is greater than or equal to the maximum transmit power of the power amplifier, the channels other than the channel with the highest priority may be directly closed, so that the channel with the highest priority is adopted. The maximum transmit power of the power amplifier transmits data. The device in this embodiment may calculate the transmit power of the multiple channels according to the indication of the power control command, and calculate the calculated transmit powers of the multiple channels respectively as the initial transmit power of the multiple channels. The embodiment may further include: calculating, according to the indication of the power control command, the transmit power of the multiple channels, and obtaining the calculated transmit power of the multiple channels; if the difference between the calculated transmit powers of the two channels in the multiple channels is greater than Presetting the threshold, respectively, setting the transmit power of the multiple channels to the initial transmit power of the multiple channels, such that the difference between the initial transmit powers of any two of the multiple channels is less than or equal to the preset threshold . Or the embodiment may include: calculating, according to an indication of the power control command, a transmit power of the multiple channels, to obtain a calculated transmit power of the multiple channels; and if there are two channels in the multiple channels, calculating a transmit power spectral density If the difference is greater than the preset threshold, the transmit power of the multiple channels is set to the initial transmit power of the multiple channels, so that the difference between the initial transmit power spectral densities of any two of the multiple channels is less than or equal to Preset thresholds. That is, when the calculated transmit power of the multiple channels cannot meet the actual demand, the calculated transmit power is not used as the initial transmit power, but by the device. The initial transmission power of a plurality of channels satisfying the condition is set by itself, and of course the initial transmission power of the plurality of channels can be pre-configured by those skilled in the art.

In one embodiment, the device can adjust the transmit power difference of the different channels such that the difference is no greater than the maximum transmit power difference between different channels that can be tolerated. Assuming that the PA maximum transmit power is P _eM4 , the maximum transmit power difference between different channels that PA can tolerate is A^ _imii , and the calculated transmit power of channel 1 is P _t , / = 1 N , where N is the parallel transmission in the current channel set. The number of channels of data. in case

∑p, > p _C!MX , can be calculated to meet the minimum power adjustment required to adjust έ ≤

. ² is a schematic diagram of a channel transmission power adjustment process according to an embodiment of the present invention, where the process includes:

S21: Calculate the calculated transmit power AP _N of the N channels in the current channel set according to the indication of the power control command.

S22: Calculate the calculated transmit power and f^. of the N channels.

S23: Determine the calculated transmit power of the N channels! ^ Is it greater than the maximum transmit power of the power amplifier « , if yes, execute S24; if no, end the power adjustment process.

S24: Select, from the N channels, a channel that is not turned off (the transmit power is not 0) and has the lowest priority, and determine whether the calculated transmit power of the channel with the lowest priority is greater than the minimum power adjustment amount Δ. _φ ., if yes, execute S25; if no, execute S28.

S25: Determine whether the difference between the transmission power of the channel with the lowest priority and the other channel after adjusting the power is greater than the maximum transmission power difference between different channels that can be tolerated, if yes, execute S26; if not, execute S27.

S26: Turn off the channel with the lowest priority. It is assumed that the channel with the lowest priority is the channel. If the transmission power of the channel P is low and the transmission power difference with other channels is greater than AP _Umit , the channel is closed. S27: The channel with the lowest priority uses the adjusted transmit power. If the channel reduces the transmission power Δ^ and still satisfies the transmission power difference with other channels, the channel is reduced by the transmission power Δ/, that is, the channel is obtained; the new transmission power of t is =Α - AP _fli3⁄4 . > 0, The remaining channel powers are unchanged, the transmit power is calculated for each, and the power adjustment process is ended.

S28: Excluding the channel with the lowest priority from the current channel set, and performing S21 again according to the updated channel set. For example, if the calculated transmit power of channel A is equal to, that is, the adjusted transmit power of channel A is 0, the channel can be directly closed; t, the remaining channel powers are unchanged, the transmit power is calculated for each, and the power adjustment process is ended. If the calculated transmit power of the channel* is less than ₄ , the channel t is turned off, the total calculated transmit power of the remaining (N-1) channels is continuously calculated, _{ΔΡ αί3⁄4 is} re-updated, and the priority is selected from the remaining (N-1) channels. The lowest channel, the above process is repeated until the total calculated transmit power is less than or equal to the maximum transmit power; or the adjustment process is repeated until only one channel remains, and the remaining maximum transmit power is taken as the transmit power of the channel.

This embodiment provides a schematic flowchart for performing power adjustment on a channel of a PA. The transmit power difference between different channels can be adjusted to a reasonable range, thereby reducing nonlinear loss of the PA and improving data transmission performance. It should be noted that, before the foregoing power adjustment, if the transmit power of the channel with the highest priority is greater than or equal to the maximum transmit power, all other low priority channels are directly turned off, and the channel with the highest priority is used to transmit data with the maximum transmit power. . The channel with the highest priority may be set by the network, or may be set by the terminal according to a specific rule, or may be pre-agreed, and the network device and the terminal have already known the agreement in advance. For example, the PUCCH may be set to have a higher priority than the PUSCH. For a plurality of PUSCHs, the priority of the PUSCH carrying the higher layer control signaling is higher than the priority of the PUSCH carrying the service data. The priority of the PUSCH with low efficiency, or the priority of the PUSCH with high transmit power is lower than the priority of the PUSCH with low transmit power; or the priority of the PUCCH is higher than the PUSCH; even the PUCCH itself can be set with different priorities. For example, the channel transmitting ACK/NACK (Acknowledgement ^ / Acknowledgement No message) has a higher priority than the channel of the PUCCH transmitting the CQI (Channel Quality Identifier). In the above embodiment, if the transmission power of the plurality of channels having the lowest priority among the plurality of channels is reduced to meet the maximum transmission power requirement, and the reduced power does not cause the transmission power difference to exceed the tolerated range, It is considered to reduce the transmission power of a plurality of channels having the lowest priority among the plurality of channels. That is, in the above process S24, a plurality of channels that are not turned off (the transmission power is not 0) and have the lowest priority may be selected from the N channels, assuming that the selected channel is ς, j=l, ..., Μ , Μ is the selected lower priority channel number, p _Cj is the transmission power of the channel ,., such as ^, np _Cj j) ≥ ΑΡ

^J /= i ^J , then reduce the power ΔΡ = ΑΡ _1πηι1 - (P _q - P _Cj ) for each of the M channels, and end the power adjustment process.

In the above embodiment, the power difference of the calculated transmit power of each channel is smaller than the maximum transmit power difference A/L of the different channels that can be tolerated. If the calculated transmit power difference of the two channels is greater than the maximum transmit of the different channels that can be tolerated. The power difference needs to be adjusted for the calculated transmit power of each channel, so that the calculated transmit power difference between the channels is less than or equal to the A/L^ adjustment of the maximum transmit power of different channels that can be tolerated. The transmission power of the channel is used as a reference, and the difference between the transmission powers of other channels and the channel with the highest transmission power is adjusted to be less than or equal to the maximum transmission power between different channels that can be tolerated or based on the transmission power of the channel with the highest priority. The transmission power of the other channels is adjusted to be within a range of Δ^^ near the transmission power of the channel with the highest priority, for example, the transmission power of the plurality of channels is adjusted to the range (the transmission power of the channel with the highest priority - 0.5x) A^ _m , ₍ , the transmission power of the channel with the highest priority +0.5χ Δ^ _ιιη , ); or Having averaged the transmit power of the channel, adjusting the transmit power of all channels to the range of A^ _IMA near the average value, for example, obtaining a first average value X for the calculated transmit power of the plurality of channels, The transmission power of the plurality of channels is adjusted to a range (the first average value X - 0.5x ^ _{m! (} , the first average value X + O. Sx A ^ )).

The following takes the channel with the highest priority as an example, and specifically adjusts the process of adjusting the power of all other channels to Δ/^ near the transmission power of the channel with the highest priority. Assuming that the maximum transmit power is a dish, the difference in transmit power of different channels that can be tolerated is _imrt , N channels in parallel Transmit data, the transmission power of the channel 为· is 3. Ρ _{1 ≠} 0, select the channel with the highest priority from the one channel, and set the channel to traverse all the channels i≠k, if Δ^=| - Α| is greater than

Then the transmission power of the channel is lowered or increased until Δ / ^ = | - A | is less than or equal to M _mit . If it is assumed that there are only two channels, the adjusted transmit power difference is A^ _m , _f /2, and actually only needs to adjust the difference of the transmission power of different channels to less than Δ/^, so such adjustment has the possibility of over-adjustment.

An embodiment of a method for adjusting the transmit power of other channels to within the AP _limit range near the transmit power of the channel with the highest priority will be described below.

^ The transmission power difference of different channels that can not be tolerated is A^ _im , , N channels transmit data in parallel, the transmission power of the channel is JLP _{i ≠} 0 , the transmission power of channel j is ., JL _; ≠ 0 , AP _i =P ₁ -P _j , if traversing all combinations of sums and satisfies =| - P| is less than or equal to Δ/^,, ie, m _ax | - | ≤ A _max , V , no adjustment is needed . Otherwise, the channel with the highest priority is selected from the N channels, and if the channel is arbitrarily satisfied, the Δ^ = ->0 is satisfied, so that the transmission power of all the satisfied channels is =A- the remaining channel power is not Change, end the adjustment process. If ^· for any ζ·, satisfies A^= -S<0, then the transmit power of all channels 满足 satisfying AP _ik < -AP _]mit is P =P _k +AP _hmit , and the remaining channel powers are unchanged and end. Adjustment process. ^There are some 4 words/satisfaction Δ^ = ->0, some channels satisfy Δ^ <0, and these channels satisfy the condition max(Ay < AP _ltm 2 < - min(A^) , then all satisfy Δ /^ <0 channel, increase its power to '=P _fc - max(A^) + A^ _im3⁄4 , the remaining channel power is unchanged, end the adjustment process; if - min(A/^)<A^ _mii / 2<max(A^) , then reduce the power of all channels satisfying Δ/^ S >0 to '=A+min(A^)+A^ _imii , and the remaining channel powers are unchanged, and the adjustment process ends; Some channels i satisfy Δ/^ = _ >0, some channels satisfy AP _ik =P _j -P _k <0 , and none of these channels satisfy the condition max(A/^)<A^ _m3⁄4 /2<- min(Af ^) or P, '=P _k -m&x(AP _lk ) + AP _limit , then traverse all channels, i≠k , if =| - | is greater than AP _Umit /2, reduce or increase the transmit power of the channel until AP _k

- P _T | Less than or equal to. In one embodiment, the difference in transmit power density of different channels cannot be greater than the difference in maximum transmit power spectral density of different channels that can be tolerated. Assuming that the transmission power of channel i is , the transmission band size of channel f is ?, then the power in the channel ζ· unit transmission bandwidth is ΛΒ, (also called power spectral density). The maximum transmit power difference that can be tolerated is the power difference in different unit transmission bandwidths.

Αβ _ίιαα . If έ >Ρ _σΜ4Χ , first select the channel with the lowest priority from the channel, assuming channel = ^ ρ - , let τ = - Δ / p _k = p _k ! B _k , if Α ' =Α_Δ^ >Ο,

i=l

And max|A-β _τ I < D ≠k, the transmission power of channel k is P _k ', and the remaining channel powers are unchanged, and the power adjustment process is ended; if / = A- Δ 〉0, and m _aX |A '- A|>AA _imii , W≠A:, then the remaining channel power of the channel is turned off, and the power adjustment process is ended. If '= - Δ . = 0, the remaining channel power of the channel is turned off, and the power adjustment process is ended. If ' = - Δ / <(), the channel /t is turned off, the channel with the lowest priority is selected from the remaining (N-1) channels, and the above process is repeated until the sum of the total calculated transmit powers is less than or equal to The maximum transmit power, or until there is only one channel left, at which time the transmit power of the channel is the remaining maximum transmit power.

Correspondingly, if the calculated transmit power of each channel cannot satisfy ^. - A| ≤ AA _m , _t for all channels and , then the transmit power of each channel needs to be adjusted so that all channels and Satisfy |A- A|≤AA _mii . The adjustment method may be: adjusting the difference between the power density of the other channel and the power density of the channel with the largest transmission power to be smaller than the maximum channel that can be tolerated, based on the channel transmission power spectral density with the largest transmission power spectral density. Transmit power density A _lim ; or adjust the transmit power density of all other channels to the transmit power near the highest priority channel AA, _mii based on the transmit power of the highest priority channel In the range, for example, the transmission power spectral density of the plurality of channels is adjusted to a range (the transmission power density of the channel with the highest priority - 0.5 χ Α β _1ιπιι1 , the transmission power density of the channel with the highest priority) +0.5xA _m , ); or averaging the transmit power spectral densities of all channels, so that the transmit power spectral densities of all channels are adjusted to be within the range of A? _limi , such as for the multiple channels Calculating the transmit power spectral density to obtain a second average value Y, and adjusting the transmit power spectral density of the plurality of channels to a range (the second average Y-0.5xAA _imii , the second average Υ+0.5χΔΑ _11Ώίί ) .

In the present embodiment, a specific implementation method for adjusting the difference in inter-channel transmission power 谙 density of all other channel transmission powers to be smaller than the range is given below. Assuming that the maximum power spectral density is, for all channels whose transmission power spectral density is larger than Α, the power spectral density is adjusted to '=A + Afi _hmit , and its transmission power is β χΒ _τ .

A specific implementation method for adjusting the transmission power spectral density of other channels to the vicinity of the transmission power spectral density of the channel with the highest priority is given below. Assume that the channel with the highest priority has a power spectral density of A, and for all channels satisfying the condition A-A>A/3⁄4 _mii /2, adjust its power density to β; =β^ίφ Ι1 with a transmit power of 'x For all channels satisfying the condition A -β _} < -Αβ _1κηα /2, adjust the power spectral density to β = β, U , and its transmission power Ρ; = β^Β^

A specific implementation method for adjusting the transmit power spectral density of a plurality of channels to the AA _mii range near the power spectral density of the highest priority channel is further given below. If 杲 traverses all combinations of / and j, it satisfies A^=| - A| ≤ AA _m , _t , ie max^- A| ≤ AU , no power adjustment is needed. Otherwise, the highest priority channel from N channels, a channel set; ί :, power spectral density if any are satisfied _Ζ · ≠ _Α

The transmission power spectral density of the channel is β; = A -AA _mii , the transmission power is ρ; = , the remaining channel power is unchanged, and the adjustment process is ended; if for any _z ',

_Therefore , the transmission power spectral density of all channels satisfying < -Αβ _1πηίί is A' = A + AA _im , and the transmission power is

, end the adjustment process. If some channels satisfy 4 _/ ^= _/ ^._4>0, some channels satisfy N _k = β, - A < 0, if the channels are satisfied

, then all over The channel Λ of foot Δ =Α- A<0 increases its power spectral density as Α'=Α- "^(Δ^ + ΔΑ^ the remaining channel power is constant, ending the adjustment process; if the channel is satisfied

, then reduce the power spectral density of all channels that satisfy = β, - > 0

The remaining channel power is unchanged, and the adjustment process ends; if some channels satisfy ^^二->. , some channels satisfy ^^= - A<0, which does not satisfy the condition max(AA, < Αβ _1πηι1 / 2 <- πώι(Δ^) or min(AA J < Αβ _1τΠί1 , II < (Αβ) condition, then Traversing all channels, ·, i≠k, reduces or increases the transmit power spectral density to ΔΑ _Λ = -β, \ less than or equal to AA _IMII /2 for all channels that satisfy ΔΑ Α-A| greater than AA _mii /2.

It should be noted that the difference in transmit power of different channels controlled by this embodiment cannot be greater than the maximum transmit power difference or the maximum transmit power spectral density of different channels that can be tolerated, and refers to multiple channels simultaneously transmitted on the same PA. . For channels that are transmitted simultaneously on different PAs, there is no such limit, or the limit value is more relaxed than on the same PA.

FIG. 3 is a schematic diagram of a user equipment according to an embodiment of the present invention. The device includes: an acquiring unit 31, configured to acquire initial transmission power of multiple channels corresponding to a power amplifier; and an adjusting unit 32, configured to: when Decreasing the transmit power of at least one of the plurality of channels having the lowest priority among the sum of the initial transmit powers of the channels exceeds the maximum transmit power of the power amplifier;

The closing unit 33 is configured to: if a channel reduces the transmit power and the difference between the transmit powers of the other channels in the multiple channels is greater than the preset threshold A, or if the channel reduces the transmit power and transmits the other channels in the multiple channels If the difference in power spectral density is greater than the preset threshold B, the channel is turned off.

The user equipment can effectively perform power control to avoid PA nonlinear loss caused by excessive difference in transmission power or power spectral density of the PA in the user equipment, and improve data transmission performance. Corresponding to the method embodiment, the acquiring unit 31 may further include: a first calculating module, configured to calculate, according to the indication of the power control command, a transmit power of the multiple channels corresponding to the power amplifier, and the calculated multiple The calculated transmit power of the channel is used as the initial transmit power of the plurality of channels, respectively. Or The obtaining unit 31 may further include: a second calculating module, configured to calculate, according to the indication of the power control command, a transmit power of the multiple channels corresponding to the power amplifier, to obtain a calculated transmit power of the multiple channels; a module, configured to set a transmit power of the multiple channels to an initial transmit power of the multiple channels, respectively, if a difference between the calculated transmit powers of the two channels in the multiple channels is greater than a preset threshold A, such that the multiple The difference between the initial transmit powers of any two of the channels is less than or equal to the preset threshold A. Or the acquiring unit 31 may further include: a third calculating module, configured to calculate, according to the indication of the power control command, a transmit power of the multiple channels corresponding to the power amplifier, to obtain a calculated transmit power of the multiple channels; a module, configured to set a transmit power of the multiple channels to an initial transmit power of multiple channels, respectively, if a difference between calculated transmit power spectral densities between two channels in the multiple channels is greater than a preset threshold B The difference between the initial transmit power spectral densities of any two of the plurality of channels is less than or equal to the preset threshold B.

The user equipment involved in this embodiment may include, but is not limited to, various types of terminal devices such as a mobile phone, a notebook computer, a PDA (Personal Digital Assistant), and the like.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium, the program When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only a few embodiments of the present invention, and various modifications and changes may be made to the present invention without departing from the spirit and scope of the invention. Those skilled in the art will appreciate that features of the described embodiments or different embodiments may be combined with each other to form new embodiments without conflict.

Claims

Rights request

A power control method, comprising:

And if a difference between a transmit power of the one channel of the at least one channel and another channel of the plurality of channels is greater than a first preset threshold A, or if the one channel is reduced in transmit power The difference between the transmit power spectral densities of the other channels in the plurality of channels is greater than the second preset threshold B, and the one channel is turned off.

2. The method of claim 1, further comprising:

When the transmission power of the channel with the highest priority among the plurality of channels is greater than or equal to the maximum transmission power of the power amplifier, all channels except the channel with the highest priority are turned off, and the channel with the highest priority is adjusted. The maximum transmit power of the power amplifier.

The method according to claim 1 or 2, wherein the obtaining the initial transmit power of the plurality of channels corresponding to the power amplifier comprises: calculating the calculated transmit of the plurality of channels corresponding to the power amplifier according to the indication of the power control command The calculated transmit power of the plurality of channels is used as the initial transmit power of the plurality of channels, respectively.

The method according to claim 1 or 2, wherein the obtaining the initial transmit power of the plurality of channels corresponding to the power amplifier comprises:

Calculating a calculated transmit power of the plurality of channels corresponding to the power amplifier according to the indication of the power control command;

If the difference between the calculated transmit powers of the two channels in the multiple channels is greater than the first preset threshold A, the initial transmit powers of the multiple channels are respectively set, so that between any two of the multiple channels The difference between the initial transmit powers is less than or equal to the first preset threshold A.

The method according to claim 4, wherein the initial transmission powers of the plurality of channels are respectively set such that a difference between initial transmission powers of any two of the plurality of channels is Less than or equal to the first preset threshold A includes:

And adjusting a difference between an initial transmit power of the other channels other than the channel for calculating the transmit power and the maximum calculated transmit power of the plurality of channels to be less than or equal to the first preset threshold A; or

Adjusting the initial transmit power of the plurality of channels to the following range: calculating the transmit power from the channel with the highest priority - 0.5 χ the first preset threshold A, until the calculated transmit power of the channel with the highest priority + 0.5 X first Preset threshold A; or

Calculating a first average value X for the calculated transmit power of the plurality of channels, and adjusting an initial transmit power of the plurality of channels to a range from: a first average value X - 0.5x a first preset threshold A, until The first average value Χ + 0.5 χ the first preset threshold A.

If the difference between the calculated transmit power spectral densities between the two channels in the plurality of channels is greater than the second preset threshold B, the initial transmit powers of the multiple channels are respectively set, such that any two of the multiple channels are The difference between the initial transmit power spectral densities is less than or equal to the second predetermined threshold B.

The method according to claim 6, wherein the initial transmission power of the plurality of channels is set separately, so that the difference between the initial transmission power and the density of any two of the plurality of channels is Less than or equal to the second preset threshold B includes:

Adjusting a difference between an initial transmit power spectral density of the other channels outside the channel having the largest calculated transmit power spectral density among the plurality of channels and the maximum calculated transmit power spectral density to be less than or equal to the second preset threshold B; or

Adjusting an initial transmit power spectral density of the plurality of channels to a range of calculated transmit power spectral densities from the highest priority channel - 0.5 x a second predetermined threshold B, up to a calculated transmit power spectrum of the highest priority channel Density +0.5 X second preset threshold B; or Calculating a second average value Y for the calculated transmit power spectral density of the plurality of channels, and adjusting an initial transmit power spectral density of the plurality of channels to the following range: from the second average Y - 0.5x second preset Threshold B, until the second average Y + 0.5 X the second preset threshold B.

8. A user equipment, comprising:

An acquiring unit, configured to acquire initial transmit powers of multiple channels corresponding to the power amplifier; and an adjusting unit, configured to: when the sum of initial transmit powers of the multiple channels exceeds a maximum transmit power of the power amplifier, reduce the multiple Transmit power of at least one channel with the lowest priority among the channels;

a shutting down unit, configured to: if a channel of the at least one channel has a difference between a transmit power of the other channels of the plurality of channels after reducing the transmit power, is greater than a first preset threshold A, or if the one channel is decreasing After the transmit power is different from the transmit power spectral density of the other channels of the plurality of channels, the difference is greater than the second preset threshold B, and the one channel is turned off.

The device according to claim 8, wherein the acquiring unit comprises: a first calculating module, configured to calculate, according to an indication of a power control command, a calculated transmit power of a plurality of channels corresponding to the power amplifier, The calculated transmit power of the plurality of channels is used as the initial transmit power of the plurality of channels, respectively.

The device according to claim 8, wherein the acquiring unit comprises: a second calculating module, configured to calculate, according to an indication of the power control command, a calculated transmit power of the plurality of channels corresponding to the power amplifier;

a first adjusting module, configured to set an initial transmit power of the multiple channels separately if the difference between the calculated transmit powers of the two channels in the multiple channels is greater than the first preset threshold A, so that the multiple channels are The difference between the initial transmit powers of any two of the channels is less than or equal to the first preset threshold A.

The device of claim 8, wherein the acquiring unit comprises: a third calculating module, configured to calculate, according to the indication of the power control command, a plurality of power amplifiers Calculated transmit power of the channel;

a second adjusting module, configured to set an initial transmit power of the multiple channels respectively if the difference between the calculated transmit power and the common density between the two channels in the plurality of channels is greater than a second preset threshold The difference between the initial transmit power spectral densities between any two of the plurality of channels is less than or equal to the second predetermined threshold Β.