CN105933980A - Efficacy control method for uplink in multi-carrier communication system - Google Patents

Efficacy control method for uplink in multi-carrier communication system Download PDF

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Publication number
CN105933980A
CN105933980A CN201610228094.7A CN201610228094A CN105933980A CN 105933980 A CN105933980 A CN 105933980A CN 201610228094 A CN201610228094 A CN 201610228094A CN 105933980 A CN105933980 A CN 105933980A
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user terminal
sub
carrier channels
selected user
efficiency
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CN105933980B (en
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周金和
王川潮
张元�
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Beijing Information Science and Technology University
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Beijing Information Science and Technology University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • 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
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Provided is an efficacy control method for an uplink in a multi-carrier communication system. The method comprises that (a) a user terminal is selected from multiple user terminals randomly; (b) gains, related to the selected user terminal, of different subcarrier channels and the minimal efficacy requirement of the selected user terminal are obtained; (c) a subcarrier channel with the highest gain related to the selected user terminal is distributed to the selected user terminal; (d) the optimal efficacy of the selected user terminal is calculated on the basis of the subcarrier channel distributed to the selected user terminal; (e) the optimal efficacy of the selected user terminal is compared with the minimal efficacy requirement of the selected user terminal; and (f) when the he optimal efficacy of the selected user terminal is higher than or equivalent to the minimal efficacy requirement of the selected user terminal, no more subcarrier channels are distributed to the selected user terminal.

Description

The energy efficiency controlling method of the up-link in multi-carrier communications systems
Technical field
The application relates to energy efficiency controlling method and the equipment of a kind of up-link, more particularly, relates to many The energy efficiency controlling method of the up-link in carrier communication system and equipment.
Background technology
Along with the development of Internet technology, people can utilize user terminal to carry out voice communication, and via Data network appreciates the service such as music and video.User terminal has become as the necessity of life, people The frequency using user terminal is the highest.But, due to the battery technology slower development in mobile terminal, Therefore the use time of user terminal cannot meet the demand of people.
At present, maximize in algorithm in the existing efficiency controlled for up-link efficiency, so that Overall efficiency maximizes and reduces the efficiency demand enjoyed of certain user's terminal, shortens its electricity Pond cruising time.It addition, up-link efficiency control algolithm based on non-cooperative game cannot ensure resource Distributional equity.
Summary of the invention
The exemplary embodiment of the present invention is to provide the energy of the up-link in a kind of multi-carrier communications systems Effect control method and equipment, with the minimum efficiency at the wireless terminal effectively meeting each intervention require same Time, embody resource distributional equity
The one side of the exemplary embodiment according to the present invention, it is provided that in a kind of multi-carrier communications systems The energy efficiency controlling method of up-link.Described method includes: (a) randomly chooses use from multiple user terminals Family terminal；B () obtains the whole about selected user of each sub-carrier channels in multiple sub-carrier channels The gain of end and the minimum efficiency requirement of selected user terminal；C () will have about selected use The sub-carrier channels of the maximum gain of family terminal distributes to selected user terminal；D () is based on distributing to The sub-carrier channels of selected user terminal, the optimum efficiency of the user terminal selected by calculating；(e) Require to compare to the optimum efficiency of selected user terminal and the minimum efficiency of selected user terminal Relatively；(f) when selected user terminal optimum efficiency more than or equal to selected user terminal When little efficiency requires, no longer sub-carrier channels is distributed to selected user terminal.
Selectively, when selected user terminal optimum efficiency less than selected user terminal Little efficiency require and exist in the plurality of sub-carrier channels free time sub-carrier channels time, can by from The sub-carrier channels randomly choosed in idle sub-carrier channels distributes to selected user terminal, and returns Return step (d).
Selectively, the minimum speed limit that can obtain selected user terminal requires and to utilizing mean power Total speed of the selected user terminal calculated and the minimum speed limit of selected user terminal require to carry out Relatively.Step (c) comprises the steps that the total speed when the selected user terminal utilizing mean power to calculate When rate requires more than or equal to the minimum speed limit of selected user terminal, no longer sub-carrier channels is distributed to Selected user terminal.
Selectively, step (c) may also include that as the selected user utilizing mean power to calculate When total speed of terminal requires less than the minimum speed limit of selected user terminal, if at the plurality of son Carrier channel does not exist the sub-carrier channels of free time, then will can distribute to selected user terminal Sub-carrier channels reclaims as idle sub-carrier channels.
Selectively, step (c) may also include that as the selected user utilizing mean power to calculate When total speed of terminal requires less than the minimum speed limit of selected user terminal, if at the plurality of son Carrier channel exists the sub-carrier channels of free time, then can by idle sub-carrier channels have about The sub-carrier channels of the maximum gain of selected user terminal distributes to selected user terminal.
Selectively, when utilize mean power calculate selected by user terminal total speed more than or When requiring equal to the minimum speed limit of selected user terminal, it may be determined that in the plurality of sub-carrier channels be The no sub-carrier channels that there is the free time.If there is the subcarrier of free time in the plurality of sub-carrier channels Channel, then can randomly choose from the plurality of user terminal in addition to selected user terminal another User terminal, and return step (b).
Selectively, if there is the sub-carrier channels of free time in the plurality of sub-carrier channels, can be true Total speed of each user terminal in fixed the plurality of user terminal the most both greater than or equal to described each The minimum speed limit requirement of user terminal.Total speed when each user terminal in the plurality of user terminal When requiring more than or equal to the minimum speed limit of each user terminal described, can be by the plurality of carrier channel Remaining sub-carrier channels reclaim as free time sub-carrier channels.
Selectively, it is both less than when the optimum efficiency of selected user terminal and another user terminal described When respective minimum efficiency requires, can be by the idle sub-carrier channels from the plurality of sub-carrier channels In the sub-carrier channels that randomly chooses distribute to from selected user terminal and another user terminal described The user terminal randomly choosed.
Selectively, when selected user terminal optimum efficiency less than selected user terminal When little efficiency requires and there is not the sub-carrier channels of free time in the plurality of sub-carrier channels, can be by The described optimum efficiency of selected user terminal is set to the minimum efficiency of selected user terminal to be needed Ask.
By the method and apparatus using the exemplary embodiment according to the present invention, it is possible to meeting each nothing In the case of the peak power constraint of line terminal and minimum-rate demand, effectively meet the wireless of each access While the minimum efficiency of terminal requires, embody resource distributional equity.
By aspect other for part elaboration present general inventive concept in following description and/or advantage, also Some be will be apparent from by description, or can learn through the enforcement of present general inventive concept.
Accompanying drawing explanation
By the description carried out below in conjunction with the accompanying drawing being exemplarily illustrated, the above and other mesh of the present invention And feature will become apparent, wherein:
Fig. 1 is the stream of the energy efficiency controlling method of the up-link illustrating the exemplary embodiment according to the present invention Cheng Tu；
Fig. 2 is the flow process of the sub-carrier channels distribution method illustrating the exemplary embodiment according to the present invention Figure；
Fig. 3 is the flow chart of the efficiency dispatching method illustrating the exemplary embodiment according to the present invention；
Fig. 4 is the frame of the efficiency control equipment of the up-link illustrating the example embodiment according to the present invention Figure.
Detailed description of the invention
Describe exemplary embodiment in detail herein with reference to accompanying drawing, make field shown in exemplary embodiment Those of ordinary skill can be easily performed the disclosure.But, present inventive concept can be implemented as many not Same form, and should not be construed as limited to exemplary embodiment set forth herein.In the accompanying drawings, for understanding Release simple and clear, omit and describe unrelated parts, and in whole accompanying drawing, similar label instruction is similar Element.
The present invention relates to the up-link of multi-carrier communications systems.Multi-carrier communications systems can include base station With multiple user terminals.Multiple user terminals may include but be not limited to smart phone, tablet personal computer (PC), laptop computer, digital broadcast terminal, personal digital assistant (PDA), portable many matchmakers Body player (PMP) and navigator.The efficiency (criterion is bits/J) of user terminal can represent Every joule of bit number that can send, efficiency is the highest, then user terminal just can transmit with less electric power Data.
Assorted agreed-upon price solution is received to realize up-link entirety efficiency optimization it is contemplated that utilize.Receive assorted agreed-upon price Solution is a kind of modeling pattern of cooperative game.Hereinafter, will be described in utilization and receive assorted agreed-upon price solution to realize energy Imitate optimized process.However, it should be appreciated that the invention is not restricted to receive assorted model of bargain, without departing from this In the case of bright scope and spirit, any cooperative game can be utilized to realize the optimized model of efficiency It is all applied to the present invention.
Fig. 1 is the stream of the energy efficiency controlling method of the up-link illustrating the exemplary embodiment according to the present invention Cheng Tu.
With reference to Fig. 1, at operation S101, base station can randomly choose user terminal from multiple user terminals.
Operation S103, base station can obtain each sub-carrier channels in multiple sub-carrier channels about institute The gain of the user terminal selected and the minimum efficiency requirement of selected user terminal.
At operation S105, the subcarrier of maximum gain that base station can will have about selected user terminal Channel distributes to selected user terminal.Here, the sub-carrier channels of fixed qty can be distributed to institute The user terminal selected.Additionally, it is also possible to consider the minimum speed limit of selected user terminal requires to believe Multiple sub-carrier channels of road gain maximum distribute to selected user terminal one by one.Hereinafter, by reference Fig. 2 describes above-mentioned process in detail.
At operation S107, base station can be carried out based on the sub-carrier channels distributing to selected user terminal Efficiency is dispatched.According to the exemplary embodiment of the present invention, base station can be based on distributing to selected user eventually The optimum efficiency of the user terminal selected by sub-carrier channels calculating of end, and to selected user terminal Optimum efficiency and selected user terminal minimum efficiency require compare.
When the optimum efficiency of selected user terminal is more than or equal to the minimum energy of selected user terminal When effect requires, no longer sub-carrier channels can be distributed to selected user terminal.As selected user The optimum efficiency of terminal requires and in the plurality of sub-load less than the minimum efficiency of selected user terminal When there is the sub-carrier channels of free time in ripple channel, base station can will be selected from idle sub-carrier channels at random The subcarrier selected distributes to selected user terminal, and recalculates the optimum of selected user terminal Efficiency.Above-mentioned process is described in detail hereinafter with reference to 3.
Fig. 2 is the flow chart of the sub-carrier wave distribution method illustrating the exemplary embodiment according to the present invention.
With reference to Fig. 2, at operation S201, base station can be by having about selected in each sub-carrier channels The sub-carrier channels of maximum gain of user terminal distribute to selected user terminal.
At operation S203, base station can obtain the minimum speed limit requirement of selected user terminal, flat to utilizing Total speed of the selected user terminal that equal power meter calculates and the minimum speed limit of selected user terminal Requirement compares.Base station also can obtain the peak power output of user terminal.Can be by by user terminal Peak power output divided by distributing to the sub-carrier channels quantity of this user terminal to calculate this user eventually The mean power of end.Total speed of user terminal can be represented by Equation 1 below and equation 2.
[equation 1]
R k = Σ n ∈ C k r k , n
[equation 2]
rk,n=Wlog2(1+pk,averHk,n)
Wherein, k is the numbering of user terminal, and n is the numbering of subcarrier, RkFor kth user terminal Total speed, pk,averFor the mean power of kth user terminal, rk,nFor kth user terminal n-th Speed in individual sub-carrier channels, W is the bandwidth of subcarrier, Hk,nFor about kth user terminal The channel gain of the n-th sub-carrier channels.
At operation S205, base station can determine that whether total speed of user terminal is less than the lowest speed of user terminal Rate requirement.When total speed of user terminal requires more than or equal to the minimum speed limit of user terminal, behaviour Making S207, base station can be no longer selected user terminal distribution sub-carrier channels.Another according to the present invention One embodiment, base station can determine whether the sub-carrier channels of free time.If there is idle subcarrier Channel, then base station can randomly choose in addition to selected user terminal from the plurality of user terminal Another user terminal, i.e. return step S101.
Subsequently, in step S209, base station can be determined whether there is also the sub-carrier channels of free time.
If there is idle sub-carrier channels, then at operation S211, base station can be determined whether to meet to be owned The minimum speed limit requirement of user terminal, i.e. determine each user terminal in the plurality of user terminal Total speed whether both greater than or equal to the minimum speed limit requirement of each user terminal described.If met The minimum speed limit requirement of all of user terminal, then sub-carrier channels distribution terminates, and at operation S213, Remaining sub-carrier channels can be reclaimed as idle sub-carrier channels, dispatch for efficiency subsequently (that is, operation S107).Without meeting the minimum speed limit requirement of all of user terminal, then can be Do not meet and the user terminal of minimum speed limit requirement randomly chooses another user terminal (that is, return to Operation S101).
If at operation S209, base station determines the sub-carrier channels that there is not the free time, then can terminate to process.
At operation S205, when total speed of user terminal requires less than the minimum speed limit of user terminal, Step 215, it may be determined whether there is the subcarrier of free time.When there is idle subcarrier, return to Operation S201, base station can be by having about selected user terminal in the most idle sub-carrier channels The sub-carrier channels of large gain distributes to selected user terminal.When the sub-carrier channels that there is not the free time Time, at operation S217, base station is rejected by the access of this user terminal, and recovery has distributed to this user's Sub-carrier channels, as idle sub-carrier channels, dispatches (that is, operation S107) for efficiency subsequently.
Fig. 3 is the flow chart of the efficiency dispatching method illustrating the exemplary embodiment according to the present invention.
With reference to Fig. 3, at operation S301, base station can be based on the subcarrier distributing to selected user terminal Channel calculates optimum efficiency.Here, base station can obtain the circuit power consumption of user terminal, subcarrier Through-put power on channel, can calculate optimum efficiency by following formula.
[expression formula 1]
U k = R k P k , t o l = Σ n ∈ C k r k , n ϵ 0 Σ n ∈ c k p k , n + P k , c
s . t . Σ n ∈ c k p k , n ≤ P k , m a x
Wherein, ε0Represent the inverse of power amplifier drain efficiency, Pk,cRepresent static circuit power consumption, pk,nFor kth user terminal through-put power in the n-th sub-carrier channels, Pk,tolFor total consumed work Rate, Pk,maxFor the maximum transmission power of kth user terminal, CkRepresent and distribute to kth user terminal The set of subcarrier.
Due to Pk,tolIt is known that just can obtain as shown in equation 3 below hence with conventional water-filling algorithm Excellent solution.
[equation 3]
p k , n = ( 1 λ ln 2 - σ 2 | h k , n | 2 ) +
Wherein, λ represents Lagrange multiplier, hk,nFor the n-th subcarrier for kth user terminal The channel gain of channel, σ2It is additive white Gaussian noise, ()+It is to take positive function.
Known total through-put power isThus can obtain
Wherein, | Ck| represent the quantity of the subcarrier distributing to kth user.Thus can be by following etc. The efficiency function U that formula 4 representsk。
[equation 4]
U k = Σ n ∈ C k log 2 [ | h k , n | 2 σ 2 | C k | ( p k + Σ n ∈ c k σ 2 | h k , n | 2 ) ] ϵ 0 p k + P k , c
Due to Uk(pk) it is pkQuasiconcave function therefore makeCan obtain
Wherein,
The optimum closing solution of total through-put power can be obtained by Lambert-W function
p k * = a W ( ae b ) - Σ n ∈ c k σ 2 | h k , n | 2 , ae b ∈ ( - 1 e ) ∪ [ 0 , ∞ ) p k * = max ( ( p k * ) + ) , p k * = { a W ( ae b ) - Σ n ∈ c k σ 2 | h k , n | 2 a W - 1 ( ae b ) - Σ n ∈ c k σ 2 | h k , n | 2 , ae b ∈ ( - 1 e , 0 )
By optimal transmission general powerSubstitute intoAvailable optimum λ, then by optimum λ substitutes into equation 3, available optimum sub-channel power distribution, and can be by the optimum son that will obtain Channel power distribution substitutes into expression formula 1 and calculates optimum efficiency.
At operation S303, base station can be whole to the optimum efficiency of selected user terminal and selected user The minimum efficiency of end requires to compare, and determines whether the optimum efficiency of selected user terminal is less than The minimum efficiency requirement of this user terminal.
When the optimum efficiency of selected user terminal requires less than the minimum efficiency of this user terminal, Operation S305, base station can determine whether the sub-carrier channels of free time.When there is idle subcarrier letter During road, at operation S307, base station can randomly choose sub-carrier channels from idle sub-carrier channels and incite somebody to action It distributes to selected user terminal.Subsequently, the optimum efficiency of this user terminal can be recalculated in base station.
When there is not the sub-carrier channels of free time, at operation S309, base station can by selected user eventually The optimum efficiency of end is set to the minimum efficiency demand of this user terminal, and terminates to process.
According to the exemplary embodiment of the present invention, when having what multiple optimum efficiency required less than minimum efficiency During user terminal, randomly choose from the user terminal that the plurality of optimum efficiency requires less than minimum efficiency User terminal, distributes to what this randomly choosed by the subcarrier randomly choosed from idle sub-carrier channels User terminal.According to the exemplary embodiment of the present invention, when selected user terminal and another user are whole When the optimum efficiency of end is both less than respective minimum efficiency requirement, by from the plurality of sub-carrier channels The sub-carrier channels randomly choosed in idle sub-carrier channels is distributed to from selected user terminal and institute State the user terminal randomly choosed in another user terminal.Optimum at the described user terminal randomly choosed After efficiency is more than or equal to minimum efficiency, if there is also the sub-carrier channels of free time, then can be by from sky The sub-carrier channels randomly choosed in not busy sub-carrier channels distribute to described in the user terminal that randomly chooses it Another outer user terminal.Although it is whole less than the user that minimum efficiency requires for there are two optimum efficiencies The situation of end is described, but to those skilled in the art it is apparent that optimum efficiency is less than The quantity of the user terminal that minimum efficiency requires is not limited to this.
Here, due in the distribution distribution of twice subcarrier user randomly choose and improving efficiency During subcarrier also randomly choose, therefore can ensure resource distributional equity.
Fig. 4 is the frame of the efficiency control equipment of the up-link illustrating the example embodiment according to the present invention Figure.
With reference to Fig. 4, the efficiency of up-link controls equipment 400 can include that selector 401, channel information obtain Take device 403, calculator 405, comparator 407 and controller 409.
According to the exemplary embodiment of the present invention, selector 401 can randomly choose from multiple user terminals User terminal.Channel information acquisition device 403 can obtain each sub-carrier channels in multiple sub-carrier channels The gain about selected user terminal and the minimum efficiency requirement of selected user terminal.Control The sub-carrier channels of the maximum gain having about selected user terminal can be distributed to selected by device 409 The user terminal selected.Calculator 405 can based on distributing to the sub-carrier channels of selected user terminal, The optimum efficiency of the user terminal selected by calculating.Comparator 407 can to selected user terminal The minimum efficiency of excellent efficiency and selected user terminal requires to compare.
In accordance with an alternative illustrative embodiment of the present invention, it is selected when the comparative result of comparator 407 When the optimum efficiency of user terminal requires more than or equal to the minimum efficiency of selected user terminal, control Sub-carrier channels no longer can be distributed to selected user terminal by device 409.
In accordance with an alternative illustrative embodiment of the present invention, it is selected when the comparative result of comparator 407 The optimum efficiency of user terminal requires less than the minimum efficiency of selected user terminal and there is the free time During sub-carrier channels, the subcarrier randomly choosed from idle sub-carrier channels can be divided by controller 409 User terminal selected by dispensing, and recalculate the optimum efficiency of selected user terminal.Optimum energy The computational methods of effect are identical with the method above by reference to described by Fig. 3, therefore, omit retouching of repetition at this State.
In accordance with an alternative illustrative embodiment of the present invention, want less than minimum efficiency when there is multiple optimum efficiency During the user terminal asked, selector 401 also can require less than minimum efficiency from the plurality of optimum efficiency User terminal randomly chooses user terminal.Additionally, controller 409 also can be by from idle subcarrier letter The subcarrier randomly choosed in road distributes to selected user terminal.
In accordance with an alternative illustrative embodiment of the present invention, channel information acquisition device 403 also can obtain selected The minimum speed limit requirement of user terminal, the bandwidth of each sub-carrier channels, the through-put power of user terminal Deng.Comparator 407 also can to utilize mean power calculate selected by user terminal total speed and The minimum speed limit of selected user terminal requires to compare.
When the comparative result of comparator 407 be utilize mean power calculate selected by user terminal When total speed requires more than or equal to the minimum speed limit of selected user terminal, controller 409 can no longer by Sub-carrier channels distributes to selected user terminal.
In accordance with an alternative illustrative embodiment of the present invention, average for utilizing when the comparative result of comparator 407 Total speed of the selected user terminal that power meter calculates is less than the minimum speed limit of selected user terminal During requirement, if there is no idle sub-carrier channels, then controller 409 can be selected by distributing to User terminal sub-carrier channels reclaim as free time sub-carrier channels.
In accordance with an alternative illustrative embodiment of the present invention, average for utilizing when the comparative result of comparator 407 Total speed of the selected user terminal that power meter calculates is less than the minimum speed limit of selected user terminal During requirement, if there are the sub-carrier channels of free time, then controller 409 in the plurality of sub-carrier channels Can be by the subcarrier with maximum gain about selected user terminal in idle sub-carrier channels Channel distributes to selected user terminal.
In accordance with an alternative illustrative embodiment of the present invention, it is less than when the optimum efficiency of selected user terminal When the minimum efficiency of selected user terminal requires and there is not the sub-carrier channels of free time, controller 409 minimums that the described optimum efficiency of selected user terminal can be set to selected user terminal Efficiency demand.
In accordance with an alternative illustrative embodiment of the present invention, whole as each user in the plurality of user terminal When total speed of end requires more than or equal to the minimum speed limit of each user terminal described, controller 409 is also Remaining sub-carrier channels can be reclaimed as idle sub-carrier channels.
By the method and apparatus using the exemplary embodiment according to the present invention, it is possible to meeting each nothing In the case of the peak power constraint of line terminal and minimum-rate demand, effectively meet the wireless of each access While the minimum efficiency of terminal requires, embody resource distributional equity.
Exemplary embodiment can be embodied as the computer-readable code on computer-readable recording medium.Calculate Machine readable storage medium storing program for executing is any data storage dress that can store the data that can be read thereafter by computer system Put.
Can quilt for performing the programmed instruction of one or more operations of method described here or described method Record, store or be fixed in one or more computer-readable recording medium.Can be by computer-implemented Described programmed instruction.Such as, computer can promote processor to perform described programmed instruction.Described medium can Including single data file, data structure etc. or include data file, the number combined with programmed instruction According to structure etc..The example of computer-readable recording medium includes: magnetizing mediums (such as, hard disk, floppy disk and Tape), optical medium (such as, CD-ROM disk and DVD), magnet-optical medium (such as, CD), And special configuration is for storing and perform hardware unit (such as, the read-only storage of programmed instruction (ROM), random access memory (RAM), flash memory etc.).The example of programmed instruction includes that machine code is (all Machine code as produced by compiler) and comprise the higher level generation that interpreter can be used to perform by computer The file of code.Programmed instruction (that is, software) can be distributed in the computer system of networking, thus with Distributed way stores and performs described software.Such as, can be by one or more computer-readable storage mediums Matter storage software and data.Additionally, can based on and use the flow chart of accompanying drawing and block diagram and provide at this Described flow chart and the corresponding description of block diagram, the programmer of embodiment art easily explain use In completing the function program of example embodiment disclosed herein, code and code segment.Additionally, it is described For performing certain combination that the unit of operation or method can be hardware, software or hardware and software.Example Such as the computer that, described unit can be the software kit run on computers or software runs the most thereon.
Although having described one or more exemplary embodiment with reference to the accompanying drawings, but this area being common Skilled artisan will appreciate that, in the feelings of the spirit and scope without departing from the present inventive concept being defined by the claims Under condition, can make a variety of changes in form and details.It should therefore be understood that example described herein Property embodiment should be considered only as descriptive, and unrestriced purpose.The scope of exemplary embodiment is not It is to be limited by detailed description, and makes to be defined by the claims, and claim and the scope of equivalent thereof Interior all differences are to be interpreted as including in the exemplary embodiment.

Claims (9)

1. an energy efficiency controlling method for the up-link in multi-carrier communications systems, including:
A () randomly chooses user terminal from multiple user terminals；
(b) obtain each sub-carrier channels in multiple sub-carrier channels about selected user terminal Gain and the minimum efficiency requirement of selected user terminal；
C the sub-carrier channels of the maximum gain having about selected user terminal is distributed to selected by () The user terminal selected；
D (), based on distributing to the sub-carrier channels of selected user terminal, the user selected by calculating is eventually The optimum efficiency of end；
E the optimum efficiency of selected user terminal and the minimum efficiency of selected user terminal are wanted by () Ask and compare；
(f) when selected user terminal optimum efficiency more than or equal to selected user terminal When little efficiency requires, no longer sub-carrier channels is distributed to selected user terminal.
2. the method for claim 1, also includes:
When the optimum efficiency of selected user terminal is less than the minimum efficiency requirement of selected user terminal And when there is the sub-carrier channels of free time in the plurality of sub-carrier channels, by from idle subcarrier The sub-carrier channels randomly choosed in channel distributes to selected user terminal, and returns step (d).
3. the method for claim 1, also includes: the lowest speed of the user terminal selected by acquisition Rate require and to utilize mean power calculate selected by total speed of user terminal and selected user The minimum speed limit of terminal requires to compare,
Wherein, step (c) including: when utilize mean power calculate selected by user terminal total When speed requires more than or equal to the minimum speed limit of selected user terminal, no longer sub-carrier channels is distributed To selected user terminal.
4. method as claimed in claim 3, wherein, step (c) also includes: when utilizing average merit Total speed of the selected user terminal that rate calculates is wanted less than the minimum speed limit of selected user terminal When asking, if there is not the sub-carrier channels of free time in the plurality of sub-carrier channels, then will distribute Reclaim as idle sub-carrier channels to the sub-carrier channels of selected user terminal.
5. method as claimed in claim 3, wherein, step (c) also includes: when utilizing average merit Total speed of the selected user terminal that rate calculates is wanted less than the minimum speed limit of selected user terminal When asking, if there is the sub-carrier channels of free time in the plurality of sub-carrier channels, then by idle son The sub-carrier channels with the maximum gain about selected user terminal in carrier channel distributes to institute The user terminal selected.
6. method as claimed in claim 3, also includes；When utilizing selected by mean power calculates User terminal total speed more than or equal to selected user terminal minimum speed limit require time, determine Whether the plurality of sub-carrier channels exists the sub-carrier channels of free time；
If there is the sub-carrier channels of free time in the plurality of sub-carrier channels, then from the plurality of use Family terminal randomly chooses another user terminal in addition to selected user terminal, and returns step (b)。
7. method as claimed in claim 6, also includes: if deposited in the plurality of sub-carrier channels In idle sub-carrier channels, determine that total speed of each user terminal in the plurality of user terminal is The no minimum speed limit requirement being both greater than or be equal to each user terminal described；
When total speed of each user terminal in the plurality of user terminal is used more than or equal to described each When the minimum speed limit of family terminal requires, the remaining sub-carrier channels in the plurality of carrier channel is reclaimed As idle sub-carrier channels.
8. method as claimed in claim 6, wherein, when selected user terminal and described another are used When the optimum efficiency of family terminal is both less than respective minimum efficiency requirement, will be from the plurality of sub-carrier channels In idle sub-carrier channels in the sub-carrier channels that randomly chooses distribute to from selected user terminal With the user terminal randomly choosed in another user terminal described.
The most the method for claim 1, wherein little when the optimum efficiency of selected user terminal Minimum efficiency in selected user terminal requires and there is not sky in the plurality of sub-carrier channels During not busy sub-carrier channels, the described optimum efficiency of selected user terminal is set to selected use The minimum efficiency demand of family terminal.
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