CN105246165B - A kind of signal transmitting power division method and device - Google Patents
A kind of signal transmitting power division method and device Download PDFInfo
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- CN105246165B CN105246165B CN201510771568.8A CN201510771568A CN105246165B CN 105246165 B CN105246165 B CN 105246165B CN 201510771568 A CN201510771568 A CN 201510771568A CN 105246165 B CN105246165 B CN 105246165B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the invention discloses a kind of signal transmitting power division method and device, this method is applied to base station, and the base station obtains the channel anti-interference ability parameter of user, is ranked up according to the parameter to each user；Calculate the theoretical distribution power value of the first user of sequence；Since the user of sequence second, according to the theoretical distribution power value of each user before active user, calculate the theoretical distribution power value of active user and whether it is greater than the transmission power level of base station, if, the quantity of active user is then reduced, circulation executes abovementioned steps；If it is not, then determining the Target Assignment performance number of each user according to the theoretical distribution power value.Due in the embodiment of the present invention, the base station is ranked up each user, and according to the theoretical distribution power value of each user before active user, calculates the theoretical distribution power value of active user, the time complexity of calculating is low, and eliminate inter-user interference can preferably.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of signal transmitting power division method and device.
Background technique
In existing non-orthogonal multiple technology, base station can be superimposed multiple subscriber signals and be sent, correspondingly, receiving end
Generally the signal of each user can be decomposited from the superposed signal received by successive interference cancellation techniques.Due to base station
Transmission power it is limited, distribute different power for different user signal largely and influence the handling capacity of system, and
Reasonable power distribution is also beneficial to the demodulation of receiving end.
Signal transmitting power division method mainly has traversal power distribution algorithm (FSPA) and constant power in the prior art
Allocation algorithm (FPA).Wherein, FSPA algorithm specifically: gather for the user chosen, traversal selects each possible
Power distribution method, such as transmission power of the base station are fixed value P, for there was only the use of 2 the two users of user 1 and user
The case where family, can traverse each power allocation scheme as shown in Table 1, finally search out most suitable one group of power distribution
Scheme.
| 1 distribution power of user | 2 distribution power of user |
| 0.1P | 0.9P |
| 0.2P | 0.8P |
| 0.3P | 0.7P |
| 0.4P | 0.6P |
| 0.5P | 0.5P |
| 0.6P | 0.4P |
| 0.7P | 0.3P |
| 0.8P | 0.2P |
| 0.9P | 0.1P |
Table 1
For only there are two the simplest time-domain multiplexed situation of user and when using 0.1P as smallest allocation unit, use
The power allocation scheme that FSPA algorithm just needs to be traversed for 9 times is selected；When users multiplexing increase or smallest allocation unit more
Hour, the number of traversing operation will greatly increase.In actual engineering in use, traversing operation causes calculation amount to increase
Major reason, so in actual use, computationally intensive, the time complexity height of this method.
FPA algorithm specifically: base station pre-sets the power sharing ratio to each subscriber signal, later just always with
The power sharing ratio preset carries out power distribution.
FPA distribution method calculation amount is small, and time complexity is low, but when the power distributed there are two user is close, letter
The good user of road condition can the user to signal conditioning difference very big interference is generated when receiving signal, and this interference is difficult to
The problem of elimination, cause the reception signal of the user of bad channel conditions not necessarily can be successfully separated out from superposed signal.
Summary of the invention
The embodiment of the invention discloses a kind of signal transmitting power division method and devices, can have in base station transmitting power
In the case where limit, the time complexity when base station being made to carry out multi-user's power distribution is reduced, and makes inter-user interference can quilt
Preferably eliminate.
In order to achieve the above objectives, the embodiment of the invention discloses a kind of signal transmitting power division methods, are applied to base station,
The method includes the steps:
Step 1: obtaining the channel anti-interference ability parameter of each accessed user；
Step 2: the sequence according to the channel anti-interference ability parameter of each accessed user from big to small, to it is each
Accessing user is ranked up；
Step 3: being located at the theoretical distribution power value of primary user after calculating sequence；
Step 4: according to the sequence of accessed user each after sequence, since being located at deputy user after sequence, according to
It is secondary to choose each accessed user as active user, it is distributed according to the theory of each accessed user before the active user
Performance number calculates the theoretical distribution power value of the active user；
Step 5: judging whether the theoretical distribution power value summation of each accessed user is greater than the transmitting function of the base station
Rate value if so, reducing the quantity of current accessed user, and carries out step 1；If it is not, then each having been connect according to identified
The theoretical distribution power value of access customer, determines the Target Assignment performance number of each accessed user.
Preferably, the theoretical distribution power value of the accessed user each according to determined by, determination has each been accessed
The Target Assignment performance number of user, comprising:
The theoretical distribution power value of determining each accessed user is determined as to the Target Assignment of each accessed user
Performance number；Or
The sum for determining the theoretical distribution power value of each accessed user, for each accessed user, according to determining
The theoretical distribution power value of the accessed user accounts for the ratio of the sum of the theoretical distribution power value and the transmitting function of the base station
Rate value determines the Target Assignment performance number of the accessed user.
Preferably, the quantity for reducing current accessed user, comprising:
From preset user pond, according to preset selection rule, the user for choosing setting quantity again is accessed, institute
The quantity that setting quantity is less than the user itself currently accessed is stated, the user pond is all users for accessing the base station
Set；Or,
The user that setting quantity is chosen in the current accessed user accesses, and the setting quantity is less than itself
The quantity of the user currently accessed.
Preferably, being located at the theoretical distribution power value of primary user after the calculating sequence, comprising:
The theoretical distribution power value for being located at primary user after the sequence is calculated according to following formula:
Wherein, P1Indicate the theoretical distribution power value for being located at primary user after sorting, R1 omaIt is located at the after indicating sequence
The Shannon channel capacity of one user, N1It is located at the inter-cell interference of primary user and being averaged for noise after indicating sequence
Power；
The sequence according to accessed user each after sequence, since being located at deputy user after sequence, successively
Each accessed user is chosen as active user, according to the theoretical distribution function of each accessed user before the active user
Rate value calculates the theoretical distribution power value of the active user, comprising:
The theoretical distribution power value of each active user is calculated according to following formula:
Wherein, i is the integer more than or equal to 2, and j is the integer more than or equal to 1 and less than i, PiIt is located at i-th after indicating sequence
The theoretical distribution power value of position user, PjIndicate the theoretical distribution power value for being located at jth position user after sorting, Ri omaIndicate sequence
It is located at the Shannon channel capacity of i-th bit user, N afterwardsiIt is located at the inter-cell interference of i-th bit user and putting down for noise after indicating sequence
Equal power.
Preferably, the channel anti-interference ability parameter for obtaining each accessed user, comprising:
The Shannon channel capacity for obtaining each accessed user makees the Shannon channel capacity of each accessed user
For the channel anti-interference ability parameter of each accessed user.
The embodiment of the invention also discloses a kind of signal transmission power distributors, are applied to base station, and described device includes:
Parameter acquisition module, for obtaining the channel anti-interference ability parameter of each accessed user；
Sorting module is right for the sequence according to the channel anti-interference ability parameter of each accessed user from big to small
Each accessed user is ranked up；
First theoretical value computing module, for calculate sequence after be located at primary user theoretical distribution power value；
Second theoretical value computing module is located at for the sequence according to accessed user each after sequence after sequence
Two users start, and successively choose each accessed user as active user, according to each of before the active user
The theoretical distribution power value of accessing user calculates the theoretical distribution power value of the active user；
Target value determining module, for judging it is described whether the theoretical distribution power value summation of each accessed user is greater than
The transmission power level of base station if so, reducing the quantity of current accessed user, and is transferred to parameter acquisition module；If it is not, then root
According to the theoretical distribution power value of identified each accessed user, the Target Assignment performance number of each accessed user is determined.
Preferably, the target value determining module, is specifically used for:
The theoretical distribution power value of determining each accessed user is determined as to the Target Assignment of each accessed user
Performance number；Or
The sum for determining the theoretical distribution power value of each accessed user, for each accessed user, according to determining
The theoretical distribution power value of the accessed user accounts for the ratio of the sum of the theoretical distribution power value and the transmitting function of the base station
Rate value determines the Target Assignment performance number of the accessed user.
Preferably, the target value determining module, is specifically used for:
From preset user pond, according to preset selection rule, the user for choosing setting quantity again is accessed, institute
The quantity that setting quantity is less than the user itself currently accessed is stated, the user pond is all users for accessing the base station
Set；Or,
The user that setting quantity is chosen in the current accessed user accesses, and the setting quantity is less than itself
The quantity of the user currently accessed.
Preferably, the first theoretical value computing module, is specifically used for:
The theoretical distribution power value of the first user of the sequence is calculated according to following formula:
Wherein, P1Indicate the theoretical distribution power value of the first user of sequence, R1 omaIndicate the Shannon channel of the first user of sequence
Capacity, N1Indicate the inter-cell interference of the first user of sequence and the mean power of noise；
The second theoretical value computing module, is specifically used for:
The theoretical distribution power value of each active user is calculated according to following formula:
Wherein, i is the integer more than or equal to 2, and j is the integer more than or equal to 1 and less than i, PiIndicate the i-th user's of sequence
Theoretical distribution power value, PjIndicate the theoretical distribution power value of sequence jth user, Ri omaIndicate the Shannon channel of the i-th user of sequence
Capacity, NiIndicate the inter-cell interference of the i-th user of sequence and the mean power of noise.
Preferably, the parameter acquisition module, is specifically used for:
The Shannon channel capacity for obtaining each accessed user makees the Shannon channel capacity of each accessed user
For the channel anti-interference ability parameter of each accessed user.
As seen from the above technical solutions, the embodiment of the invention provides a kind of signal transmitting power division method and dresses
It sets, is applied to base station, the base station obtains the channel anti-interference ability parameter of each accessed user；Use has been accessed according to each
The sequence of the channel anti-interference ability parameter at family from big to small, is ranked up each accessed user；It is located at after calculating sequence
The theoretical distribution power value of primary user；According to the sequence of accessed user each after sequence, second is located at after sequence
The user of position starts, and successively chooses each accessed user as active user, has connect according to each of before the active user
The theoretical distribution power value of access customer calculates the theoretical distribution power value of the active user；Judge each accessed user's
Whether theoretical distribution power value summation is greater than the transmission power level of the base station, if so, reducing the number of current accessed user
Amount, and carry out step 1；If it is not, then being determined each according to the theoretical distribution power value of identified each accessed user
The Target Assignment performance number of accessing user.Due in the embodiment of the present invention, the base station according to channel anti-interference ability parameter from
Small sequence is arrived greatly, each accessed user is ranked up, and according to the sequence of accessed user each after sequence, is successively selected
Take each accessed user as active user, and according to the theoretical distribution function of each accessed user before the active user
Rate value calculates the theoretical distribution power value of the active user, i.e., in embodiments of the present invention, when to current accessed user into
When row power distribution, interference caused by the accessed user better than its channel condition can be accounted for, and then make to calculate
The theoretical distribution power value of obtained active user is enough to resist interference caused by the accessed user better than its channel condition,
It eliminate inter-user interference can preferably, and this method is not necessarily to traversing operation, the time complexity of calculating is low.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of flow diagram for signal transmitting power division method that the embodiment of the present invention one provides；
Fig. 2 is multi-user's power distribution schematic diagram provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram for signal transmission power distributor that the embodiment of the present invention one provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Below by specific embodiment, the present invention is described in detail.
Fig. 1 is a kind of flow diagram for signal transmitting power division method that the embodiment of the present invention one provides, the side
Method is applied to base station, and the method may include steps:
S101: the channel anti-interference ability parameter of each accessed user is obtained.
The accessed user refers to the user for currently needing that data communication is carried out by the base station.
Cell environment of each accessed user as locating for itself is different, the channel item between the base station
Part is also not quite similar, it may appear that the case where each channel anti-interference ability is different or even differs greatly, the channel are anti-dry
Disturb ability parameter characterization is exactly the power of each channel anti-interference ability.It in embodiments of the present invention, can be with each
Shannon channel capacity of the accessed user under quadrature condition is as the channel anti-interference ability parameter.Assuming that currently having accessed
K user be expressed as { u1,u2,...,uk, then the Shannon channel capacity of each user can be determined by following formula:
Wherein, Ri omaIndicate user uiShannon channel capacity, W indicates each occupied band bandwidth of accessed user,
K indicates the sum of current accessed user, γi omaIt indicates under quadrature condition, it is assumed that the base station is to each accessed user
User u when the transmission power of distribution is identicaliSignal to Interference plus Noise Ratio.
Wherein, under quadrature condition, it is assumed that when the transmission power that each accessed user is distributed in the base station is identical
User uiSignal to Interference plus Noise Ratio γi omaIt can be determined by following formula:
Wherein, hiFor the base station to user uiChannel coefficients, NiFor user uiInter-cell interference and noise be averaged
Power, P are the transmission power level of the base station.
It is each when the transmission power that each accessed user is distributed in the base station is identical due under quadrature condition
The Signal to Interference plus Noise Ratio of accessed user is positively correlated with Shannon channel capacity of the corresponding each accessed user under quadrature condition
Relationship, so can also be under quadrature condition, assuming that the transmission power phase that each accessed user is distributed in the base station
Meanwhile with the Signal to Interference plus Noise Ratio of each user be each accessed user channel anti-interference ability parameter.
The user is in the calculating of the Shannon channel capacity under quadrature condition and described under quadrature condition, it is assumed that described
Being calculated as each accessed user's Signal to Interference plus Noise Ratio when the transmission power that each accessed user is distributed in base station is identical is existing
Technology, the present invention repeat no more.
S102: it according to the sequence of the channel anti-interference ability parameter of each accessed user from big to small, has been connect to each
Access customer is ranked up.
Wherein, channel anti-interference ability parameter is bigger, and channel anti-interference ability is stronger, can basis when being ranked up
The sequence of the channel anti-interference ability parameter of each accessed user from big to small, is ranked up each accessed user.Example
Such as, when using Shannon channel capacity of each accessed user under quadrature condition as the channel anti-interference ability parameter,
For three accessed user u1、u2And u3, by calculating, obtain the corresponding Shannon channel capacity of each accessed user
Respectively R1 oma、R2 omaAnd R3 oma, and have R2 oma> R3 oma> R1 oma, then user u2For the user of sequence first, user u3For row
The user of sequence second, user u1For the user for the third that sorts.
S103: the theoretical distribution power value for being located at primary user after sorting is calculated.
It, all can be by the signal interference of other accessed users, Ke Yitong for any accessed user
Successive interference cancellation techniques are crossed, eliminate the accessed user bring interference weaker than the subscriber channel anti-interference ability, but can not
The accessed user's bring eliminated than the subscriber channel strong antijamming capability is interfered.It is primary due to being located at after the sequence
User is the strongest user of channel anti-interference ability in all accessed users, it can is located at first after thinking the sequence
User not by the signal interference of other accessed users, only influenced by user's inter-cell interference and noise, it is possible to
It is calculated by the following formula the theoretical distribution power value for being located at primary user after the sequence:
Wherein, P1Indicate the theoretical distribution power value for being located at primary user after sorting, R1 omaIt is located at the after indicating sequence
The Shannon channel capacity of one user, N1It is located at the inter-cell interference of primary user and being averaged for noise after indicating sequence
Power；Wherein R1 omaAnd N1The content for being calculated as the prior art, the present invention repeats no more.
S104: according to the sequence of accessed user each after sequence, since being located at deputy user after sequence, successively
Each accessed user is chosen as active user, according to the theoretical distribution function of each accessed user before the active user
Rate value calculates the theoretical distribution power value of the active user.
It, all can be by the signal interference of other accessed users, Ke Yitong for any accessed user
Successive interference cancellation techniques are crossed, eliminate the accessed user bring interference weaker than the subscriber channel anti-interference ability, but can not
The accessed user's bring eliminated than the subscriber channel strong antijamming capability is interfered.Again because channel anti-interference ability parameter is got over
Big correspondence user, channel anti-interference ability is stronger, and then its collating sequence is more forward, and then needs initially to the user
It is necessary to considering influence brought by the transmission power of the user more forward than its of sorting when distribution power.
A kind of method for eliminating the accessed user's bring interference for sorting forward provided in an embodiment of the present invention is that will work as
The a part of the theoretical distribution power value of each accessed user before preceding user as interference power values calculates described current
The theoretical distribution power value of user.As shown in Fig. 2, having accessed m on the frequency band that bandwidth is WkA user, respectively UE1,
UE2、...、UEmk, corresponding channel anti-interference ability parameter be respectively s (UE1), s (UE2) ..., s (UEmk), size
Relationship are as follows: s (UE1) > s (UE2) > ... > s (UEmk), then after being ranked up according to method described in S102, it is known that number is smaller
User sequence it is more forward, then the theoretical distribution power value of user UE1 can be determined by formula (1), when calculating user UE2 reason
When by distribution power value, just user UE1 takes into account the interference of user UE2, similarly, in the user that will be sorted more posteriorly
As active user, carry out when theoretical distribution power value calculates it is necessary to sort it is more forward than the active user it is all other
Accessing user takes into account the interference of the active user, and the theoretical distribution power value for carrying out active user calculates.It can be by
The theoretical distribution power value of each active user is calculated according to following formula:
Wherein, i is the integer more than or equal to 2, and j is the integer more than or equal to 1 and less than i, PiIt is located at i-th after indicating sequence
The theoretical distribution power value of position user, PjIndicate the theoretical distribution power value for being located at jth position user after sorting, Ri omaIndicate sequence
It is located at the Shannon channel capacity of i-th bit user, N afterwardsiIt is located at the inter-cell interference of i-th bit user and putting down for noise after indicating sequence
Equal power.
As it can be seen that formula (2) and the difference of formula (1) are, it willAs a part of signal interference, carry out theoretical
The calculating of distribution power value.
S105: judge whether the theoretical distribution power value summation of each accessed user is greater than the transmission power of the base station
Value, if so, S106 is executed, if it is not, then executing S107.
The transmission power level of the base station is a finite value, and the power of each accessed user is by described in this
What the transmission power of base station was distributed；And then when the theoretical distribution power value summation of each accessed user is greater than the base station
Transmission power level when, that is, prove the transmission power of the base station be not enough to according to each accessed user theory distribution
Performance number carries out power distribution to each accessed user.
S106: reducing the quantity of current accessed user, executes S101.
The theoretical distribution function of accessed user can be re-started by the way of the quantity for reducing current accessed user
The determination and distribution of rate value.Accessed user's quantity is 5 as is now described, and the theory of each accessed user is found by calculating
Distribution power value summation is greater than the transmission power level of the base station, then presently described accessed user's quantity can be reduced to 4,3,
2, any value in 1, re-starts the theoretical distribution power value of accessed user really at the step of carrying out S101 to S104 again
Fixed and distribution.In embodiments of the present invention, it can be carried out by the way of making the quantity of current accessed user reduce 1 every time
The theory distribution power value redefining and distributing.
S107: according to the theoretical distribution power value of identified each accessed user, determine each accessed user's
Target Assignment performance number.
When the theoretical distribution power value summation for judging each accessed user is not more than the transmission power level of the base station,
Prove that the transmission power level of presently described base station is enough theoretical distribution power value according to each accessed user to each
A accessed user carries out power distribution.
Sequence of the embodiment of the present invention according to the channel anti-interference ability parameter of each accessed user from big to small, to every
A accessed user is ranked up, and is calculated according to the theoretical distribution power value of each accessed user before the active user
That is, in embodiments of the present invention the theoretical distribution power value of the active user is divided when carrying out power to current accessed user
Timing can account for interference caused by the accessed user better than its channel condition, and then make to be calculated works as
The theoretical distribution power value of preceding user is enough to resist interference caused by the accessed user better than its channel condition, makes between user
Interference can be eliminated preferably, and this method is not necessarily to traversing operation, and the time complexity of calculating is low.
When the theoretical distribution power value summation for judging each accessed user is not more than the transmission power level of the base station,
The theoretical distribution power value of determining each accessed user directly can be determined as each accessed user's by the base station
Target Assignment performance number；Or according to by each theoretical distribution power be worth it is reasonable by distribution power value and ratio and institute
The product of the transmission power level of base station is stated, the determination of Target Assignment performance number is carried out.Based on side described in the embodiment of the present invention one
Method, in method shown in Fig. 1, step S107 may include:
The theoretical distribution power value of determining each accessed user is determined as to the Target Assignment of each accessed user
Performance number；Or
The sum for determining the theoretical distribution power value of each accessed user, for each accessed user, according to determining
The theoretical distribution power value of the accessed user accounts for the ratio of the sum of the theoretical distribution power value and the transmitting function of the base station
Rate value determines the Target Assignment performance number of the accessed user.
For example, currently having and only user 1, user 2 and user 3 these three accessed users, corresponding theoretical distribution
Performance number is respectively 10,40,30, and the summation of theoretical distribution power value is 80, and corresponding each theoretical distribution power is worth reasonable opinion
The ratio of the summation of distribution power value is respectively 1/8,1/2 and 3/8；And the transmission power level of the base station is 100, is met each
The theoretical distribution power value summation of accessed user, at this moment can directly really no more than the condition of the transmission power level of the base station
Theorem opinion distribution power value be 10,40,30 be corresponding accessed user Target Assignment performance number, or
It, can also be by the transmission power of base station according to 1/8,1/2 and 3/8 in order to make full use of the transmission power resource of base station
Ratio be allocated, obtain 12.5,50 and 37.5 these three performance numbers, then can be determined as corresponding to by 12.5,50 and 37.5
Accessed user Target Assignment performance number.
In the embodiment of the present invention, the base station can be determined the theoretical distribution power value of determining each accessed user
For the Target Assignment performance number of each accessed user；Or institute is accounted for according to the theoretical distribution power value of the determining accessed user
The ratio of the sum of theoretical distribution power value and the transmission power level of the base station are stated, determines the Target Assignment of the accessed user
Performance number improves the flexibility of determining Target Assignment performance number.
It, can be by choosing setting quantity again in preset user pond in another embodiment provided by the invention
The method that is accessed of user, or choose in the current accessed user side that the user of setting quantity is accessed
Method, to reduce the quantity of current accessed user.Based on method described in the embodiment of the present invention one, in method shown in Fig. 1, step
S106 may include:
From preset user pond, according to preset selection rule, the user for choosing setting quantity again is accessed, institute
The quantity that setting quantity is less than the user itself currently accessed is stated, the user pond is all users for accessing the base station
Set；Or,
The user that setting quantity is chosen in the current accessed user accesses, and the setting quantity is less than itself
The quantity of the user currently accessed.
In the embodiment of the present invention, the base station can set the user of quantity by choosing again in preset user pond
The method accessed, or the method that the user of quantity is accessed that sets is chosen in the current accessed user, come
The quantity for reducing current accessed user improves the flexibility for reducing the quantity of current accessed user.
The embodiment of the invention provides a kind of signal transmitting power division methods, are applied to base station, and the base station obtains each
The channel anti-interference ability parameter of a accessed user；According to the channel anti-interference ability parameter of each accessed user from greatly to
Small sequence is ranked up each accessed user；Calculate the theoretical distribution power value for being located at primary user after sorting；
According to the sequence of accessed user each after sequence, since being located at deputy user after sequence, successively chooses and each connect
Access customer calculates institute according to the theoretical distribution power value of each accessed user before the active user as active user
State the theoretical distribution power value of active user；It is described to judge whether the theoretical distribution power value summation of each accessed user is greater than
The transmission power level of base station if so, reducing the quantity of current accessed user, and carries out step 1；If it is not, then according to really
The theoretical distribution power value of fixed each accessed user, determines the Target Assignment performance number of each accessed user.Due to this
In inventive embodiments, sequence of the base station according to channel anti-interference ability parameter from big to small, to each accessed user into
Row sequence, and according to the sequence of accessed user each after sequence, each accessed user is successively chosen as active user, and
The theoretical distribution of the active user is calculated according to the theoretical distribution power value of each accessed user before the active user
Performance number that is, in embodiments of the present invention, can will be than its channel condition when carrying out power distribution to current accessed user
Interference caused by good accessed user accounts for, and then makes the theoretical distribution power value foot for the active user being calculated
It is interfered caused by the accessed user better than its channel condition with resisting, eliminate inter-user interference can preferably, and the party
Method is not necessarily to traversing operation, and the time complexity of calculating is low.
Fig. 3 is a kind of structural schematic diagram of signal transmission power distributor provided in an embodiment of the present invention, which answers
For base station, the apparatus may include:
Parameter acquisition module 301, for obtaining the channel anti-interference ability parameter of each accessed user；
Sorting module 302, for the sequence according to the channel anti-interference ability parameter of each accessed user from big to small,
Each accessed user is ranked up；
First theoretical value computing module 303, for calculate sequence after be located at primary user theoretical distribution power value；
Second theoretical value computing module 304 is located at after sequence for the sequence according to accessed user each after sequence
Deputy user starts, and successively chooses each accessed user as active user, according to each of before the active user
The theoretical distribution power value of accessed user calculates the theoretical distribution power value of the active user；
Target value determining module 305, for judging whether the theoretical distribution power value summation of each accessed user is greater than
The transmission power level of the base station if so, reducing the quantity of current accessed user, and is transferred to parameter acquisition module 301；If
It is no, then according to the theoretical distribution power value of identified each accessed user, determine the Target Assignment of each accessed user
Performance number.
Further, the target value determining module 305, is specifically used for:
The theoretical distribution power value of determining each accessed user is determined as to the Target Assignment of each accessed user
Performance number；Or
The sum for determining the theoretical distribution power value of each accessed user, for each accessed user, according to determining
The theoretical distribution power value of the accessed user accounts for the ratio of the sum of the theoretical distribution power value and the transmitting function of the base station
Rate value determines the Target Assignment performance number of the accessed user.
Further, the target value determining module 305, is specifically used for:
From preset user pond, according to preset selection rule, the user for choosing setting quantity again is accessed, institute
The quantity that setting quantity is less than the user itself currently accessed is stated, the user pond is all users for accessing the base station
Set；Or,
The user that setting quantity is chosen in the current accessed user accesses, and the setting quantity is less than itself
The quantity of the user currently accessed.
Further, the first theoretical value computing module 303, is specifically used for:
The theoretical distribution power value of the first user of the sequence is calculated according to following formula:
Wherein, P1Indicate the theoretical distribution power value of the first user of sequence, R1 omaIndicate the Shannon channel of the first user of sequence
Capacity, N1Indicate the inter-cell interference of the first user of sequence and the mean power of noise；
The second theoretical value computing module 304, is specifically used for:
The theoretical distribution power value of each active user is calculated according to following formula:
Wherein, i is the integer more than or equal to 2, and j is the integer more than or equal to 1 and less than i, PiIndicate the i-th user's of sequence
Theoretical distribution power value, PjIndicate the theoretical distribution power value of sequence jth user, Ri omaIndicate the Shannon channel of the i-th user of sequence
Capacity, NiIndicate the inter-cell interference of the i-th user of sequence and the mean power of noise.
Further, the parameter acquisition module 301, is specifically used for:
The Shannon channel capacity for obtaining each accessed user makees the Shannon channel capacity of each accessed user
For the channel anti-interference ability parameter of each accessed user.
The embodiment of the invention provides a kind of signal transmitting power division method and devices, are applied to base station, the base station
Obtain the channel anti-interference ability parameter of each accessed user；According to the channel anti-interference ability parameter of each accessed user
Sequence from big to small is ranked up each accessed user；It is distributed after calculating sequence positioned at the theoretical of primary user
Performance number；According to the sequence of accessed user each after sequence, since being located at deputy user after sequence, successively choose every
A accessed user is as active user, according to the theoretical distribution power value of each accessed user before the active user,
Calculate the theoretical distribution power value of the active user；Judge whether the theoretical distribution power value summation of each accessed user is big
Transmission power level in the base station if so, reducing the quantity of current accessed user, and carries out step 1；If it is not, then root
According to the theoretical distribution power value of identified each accessed user, the Target Assignment performance number of each accessed user is determined.
Since in the embodiment of the present invention, sequence of the base station according to channel anti-interference ability parameter from big to small has been accessed to each
User is ranked up, and according to the sequence of accessed user each after sequence, successively chooses each accessed user as current
User, and calculate according to the theoretical distribution power value of each accessed user before the active user reason of the active user
By distribution power value, i.e., in embodiments of the present invention, when carrying out power distribution to current accessed user, can will believe than it
Interference caused by the good accessed user of road condition accounts for, and then makes the theoretical distribution function for the active user being calculated
Rate value is enough to resist interference caused by the accessed user better than its channel condition, eliminate inter-user interference can preferably,
And this method is not necessarily to traversing operation, the time complexity of calculating is low.
For systems/devices embodiment, since it is substantially similar to the method embodiment, so the comparison of description is simple
Single, the relevent part can refer to the partial explaination of embodiments of method.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Those of ordinary skill in the art will appreciate that all or part of the steps in realization above method embodiment is can
It is completed with instructing relevant hardware by program, the program can store in computer-readable storage medium,
The storage medium designated herein obtained, such as: ROM/RAM, magnetic disk, CD.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (8)
1. a kind of signal transmitting power division method, which is characterized in that it is applied to base station, the method includes the steps:
Step 1: obtaining the channel anti-interference ability parameter of each accessed user；
Step 2: the sequence according to the channel anti-interference ability parameter of each accessed user from big to small, has been accessed to each
User is ranked up；
Step 3: according to the theoretical distribution power value for being located at primary user after the calculating sequence of following formula:
Wherein, P1Indicate the theoretical distribution power value for being located at primary user after sorting, R1 omaIt is located at first after indicating sequence
User Shannon channel capacity, N1It is located at the inter-cell interference of primary user and the average function of noise after indicating sequence
Rate；
Step 4: since being located at deputy user after sequence, successively being selected according to the sequence of accessed user each after sequence
Take each accessed user as active user, according to the theoretical distribution power of each accessed user before the active user
Value, the theoretical distribution power value of the active user is calculated according to following formula:
Wherein, i is the integer more than or equal to 2, and j is the integer more than or equal to 1 and less than i, PiIt is located at i-th bit use after indicating sequence
The theoretical distribution power value at family, PjIndicate the theoretical distribution power value for being located at jth position user after sorting, Ri omaIndicate position after sorting
In the Shannon channel capacity of i-th bit user, NiIt is located at the inter-cell interference of i-th bit user and the average function of noise after indicating sequence
Rate；
Step 5: judging whether the theoretical distribution power value summation of each accessed user is greater than the transmission power of the base station
Value, if so, reducing the quantity of current accessed user, and returns to the step 1；If it is not, then according to it is identified it is each
The theoretical distribution power value of accessing user, determines the Target Assignment performance number of each accessed user.
2. the method according to claim 1, wherein the theory of the accessed user each according to determined by
Distribution power value determines the Target Assignment performance number of each accessed user, comprising:
The theoretical distribution power value of determining each accessed user is determined as to the Target Assignment power of each accessed user
Value；Or
The sum for determining the theoretical distribution power value of each accessed user, for each accessed user, according to determining this
The theoretical distribution power value of accessing user accounts for the ratio of the sum of the theoretical distribution power value and the transmission power of the base station
Value, determines the Target Assignment performance number of the accessed user.
3. the method according to claim 1, wherein the quantity for reducing current accessed user, comprising:
From preset user pond, according to preset selection rule, the user for choosing setting quantity again is accessed, described to set
Fixed number amount is less than the quantity of the user itself currently accessed, and the user pond is the collection for accessing all users of the base station
It closes；Or,
The user that setting quantity is chosen in the current accessed user accesses, and it is current that the setting quantity is less than itself
The quantity of the user accessed.
4. the method according to claim 1, wherein the anti-interference energy of channel for obtaining each accessed user
Force parameter, comprising:
The Shannon channel capacity for obtaining each accessed user, using the Shannon channel capacity of each accessed user as each
The channel anti-interference ability parameter of a accessed user.
5. a kind of signal transmission power distributor, which is characterized in that be applied to base station, described device includes:
Parameter acquisition module, for obtaining the channel anti-interference ability parameter of each accessed user；
Sorting module, for the sequence according to the channel anti-interference ability parameter of each accessed user from big to small, to each
Accessed user is ranked up；
First theoretical value computing module, for according to the theoretical distribution function for being located at primary user after the calculating sequence of following formula
Rate value:
Wherein, P1Indicate the theoretical distribution power value of the first user of sequence, R1 omaIndicate that the Shannon channel of the first user of sequence holds
Amount, N1Indicate the inter-cell interference of the first user of sequence and the mean power of noise；
Second theoretical value computing module is located at second for the sequence according to accessed user each after sequence after sequence
User start, successively choose each accessed user as active user, accessed according to each of before the active user
The theoretical distribution power value of user calculates the theoretical distribution power value of the active user according to following formula:
Wherein, i is the integer more than or equal to 2, and j is the integer more than or equal to 1 and less than i, PiIndicate the theory of the i-th user of sequence
Distribution power value, PjIndicate the theoretical distribution power value of sequence jth user, Ri omaIndicate that the Shannon channel of the i-th user of sequence holds
Amount, NiIndicate the inter-cell interference of the i-th user of sequence and the mean power of noise；
Target value determining module, for judging whether the theoretical distribution power value summation of each accessed user is greater than the base station
Transmission power level, if so, reducing the quantity of current accessed user, and be transferred to the parameter acquisition module；If it is not, then root
According to the theoretical distribution power value of identified each accessed user, the Target Assignment performance number of each accessed user is determined.
6. device according to claim 5, which is characterized in that the target value determining module is specifically used for:
The theoretical distribution power value of determining each accessed user is determined as to the Target Assignment power of each accessed user
Value；Or
The sum for determining the theoretical distribution power value of each accessed user, for each accessed user, according to determining this
The theoretical distribution power value of accessing user accounts for the ratio of the sum of the theoretical distribution power value and the transmission power of the base station
Value, determines the Target Assignment performance number of the accessed user.
7. device according to claim 5, which is characterized in that the target value determining module is specifically used for:
From preset user pond, according to preset selection rule, the user for choosing setting quantity again is accessed, described to set
Fixed number amount is less than the quantity of the user itself currently accessed, and the user pond is the collection for accessing all users of the base station
It closes；Or,
The user that setting quantity is chosen in the current accessed user accesses, and it is current that the setting quantity is less than itself
The quantity of the user accessed.
8. device according to claim 5, which is characterized in that the parameter acquisition module is specifically used for:
The Shannon channel capacity for obtaining each accessed user, using the Shannon channel capacity of each accessed user as each
The channel anti-interference ability parameter of a accessed user.
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