CN103354657A - Optimum equal signal-to-interference ratio-based power control algorithm in multi-service wireless network - Google Patents

Optimum equal signal-to-interference ratio-based power control algorithm in multi-service wireless network Download PDF

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CN103354657A
CN103354657A CN2013103177757A CN201310317775A CN103354657A CN 103354657 A CN103354657 A CN 103354657A CN 2013103177757 A CN2013103177757 A CN 2013103177757A CN 201310317775 A CN201310317775 A CN 201310317775A CN 103354657 A CN103354657 A CN 103354657A
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terminal
gamma
power control
wireless network
interference ratio
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周元元
李大创
孔勐
范程华
王菲菲
陈璐
刘丹丹
梁存
梅荣
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Hefei Normal University
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Hefei Normal University
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Abstract

Disclosed in the invention is an optimum equal signal-to-interference ratio-based power control algorithm in a multi-service wireless network. The power control algorithm comprises the following steps that: firstly, a power vector is initialized into p j<D>(k) with the j belonging to a set of Gamma D, or pj<V> (k) with the j belonging to a set of Gamma V, wherein the initial time k is equal to 0; secondly, an optimum equal signal-to-interference ratio gamma T of a data terminal determined by a formula is solved; thirdly, on the condition that the following formula is satisfied: k=K+1, a formula is used to calculate a result of pj<D> (k+1) for each data terminal; and a formula is used to calculate a result of pj<V> (k+1) for a voice terminal; fourthly, if the following formulas are satisfied: pj<D> (k+1)=pj<D> (k) with the j belonging to the set of Gamma D, and pj<V>(k+1)=pj<V>(k) with the j belonging to Gamma V, the algorithm operation is stopped; and otherwise, the algorithm returns to the third step. According to the optimum equal signal-to-interference ratio-based power control algorithm provided by the invention, communication terminals in the communication system have high effectiveness and low emission power, so that utilization of the wireless network resources is reasonable and fair.

Description

In the multi-service wireless network based on the power control algorithm of the signal interference ratios such as the best
Technical field
The present invention relates in a kind of multi-service wireless network the power control algorithm based on signal interference ratios such as the bests.
Background technology
Along with the fast development of cordless communication network, the demand of wireless traffic is rapid growth also.Traditional voice communication can not have been satisfied people's needs, and the demand of the multimedia services such as data will sharply increase, and it is more and more important that the management of wireless network resource also just becomes, and power control is a key technology of RRM.
So far, for the power control techniques of voice communication a large amount of research has been arranged, and the control of the power of data communication is a problem that requires study.And in practical communication system, data communication and voice communication have concurrently simultaneously, and therefore, the power control techniques of research multi-service wireless network is very important.Remarkable different for data communication and conventional voice communications, a kind of new be applicable to multi-service wireless network become the focus of present research based on the power control model (HNPG:Heterogeneous Noncooperative Power control Game) of non-cooperative game.In this model, the service quality preference of each data terminal is represented that by utility function the problem of studying is so that the utility function of all data terminals all maximizes, and voice terminal then is operated under its signal interference ratio thresholding.
Yet in this non-cooperative game, because the blind competition between data terminal, the Nash Equilibrium that causes algorithm is not Pareto optimality (Pareto Optimality).This is not only so that the power management of data terminal and voice terminal is unreasonable, and energy consumes too fast, and the effectiveness of data terminal is also relatively low.Therefore, can improve this algorithm, so that each data terminal can both obtain with lower transmitting power higher effectiveness in the model.
Summary of the invention
The present invention is the weak point that exists in the above-mentioned prior art for avoiding, power control algorithm based on signal interference ratios such as the bests is provided in a kind of multi-service wireless network, so that the communication terminal in the communication system all has relatively high effectiveness and lower transmitting power, thereby so that the use of wireless network resource is more reasonable and fair.
The present invention be the technical solution problem by the following technical solutions.
Based on the power control algorithm of the signal interference ratios such as the best, it comprises following step in the multi-service wireless network:
Step 1: the initialization power vector is Initial time k=0;
Step 2: the signal interference ratio γ such as the best of solution formula (1) established data terminal T
Gf ( &gamma; T ) = [ G - ( N D - 1 ) &gamma; T ] &gamma; T df ( &gamma; T ) d&gamma; T - - - ( 1 )
Step 3: make k=k+1, to each data terminal, calculate with formula (2)
Figure BDA00003565957600021
To voice terminal, calculate with formula (3)
Figure BDA00003565957600022
Figure BDA00003565957600023
Step 4: if
Figure BDA00003565957600024
Algorithm stops; Otherwise return step 3;
Wherein: in a single residential quarter cdma wireless multibusiness network system, N terminal wherein has N altogether DIndividual data terminal, N-N D=N VIndividual voice terminal; The speed of each terminal emission information is Rbps, and the bandwidth of spread-spectrum is WHz, and G=W/R is the spreading gain of this system; The grouping of each terminal is fixed as the M bit, and the information bit to be transmitted that wherein comprises is L and L＜M; Make Γ=1,2 ..., N} is the set of current terminal in the cellular cell, Γ D=1 ...., N DThe set of data terminal in the expression cellular cell, Γ V={ N D+ 1 ...., N} represents the set of voice terminal in the cellular cell;
Figure BDA00003565957600025
The transmitting power of data terminal j,
Figure BDA00003565957600026
The transmitting power that is voice terminal j represents; P jBe the strategy set of terminal j transmitting power, it is power level p that each terminal is selected its strategy j∈ P j
Figure BDA00003565957600027
Be respectively the utility function of data terminal j and the utility function of voice terminal j.
Compared with the prior art, beneficial effect of the present invention is embodied in:
In the multi-service wireless network of the present invention based on the power control algorithm of the signal interference ratios such as the best, introduce the signal interference ratio concepts such as the best of data terminal, so that all data terminals all are operated in best waiting under the signal interference ratio in the system, voice terminal is operated under the target signal interference ratio thresholding of voice communications services quality threshold.Derive a new distributed power control algorithm based on signal interference ratios such as the bests.This algorithm has obviously improved the service quality of system, and terminal all has relatively high effectiveness and lower transmitting power in the system, also so that the use of wireless network resource is more reasonable and fair.
Description of drawings
Fig. 1 is based on the flow chart of the power control algorithm of the signal interference ratios such as the best in the multi-service wireless network of the present invention.
Fig. 2 is the effectiveness figure after stable based on the power control algorithm of the signal interference ratios such as the best and traditional HNPG algorithm in the multi-service wireless network of the present invention.
Fig. 3 is the transmitting power figure after stable based on the power control algorithm of the signal interference ratios such as the best and traditional HNPG algorithm in the multi-service wireless network of the present invention.
Below pass through embodiment, and the invention will be further described by reference to the accompanying drawings.
Embodiment
Referring to accompanying drawing 1, based on the power control algorithm of the signal interference ratios such as the best, comprise following step in the multi-service wireless network:
Step 1: the initialization power vector is
Figure BDA00003565957600035
J ∈ Γ D,
Figure BDA00003565957600036
J ∈ Γ V, initial time k=0;
Step 2: the signal interference ratio γ such as the best of solution formula (1) established data terminal T
Gf ( &gamma; T ) = [ G - ( N D - 1 ) &gamma; T ] &gamma; T df ( &gamma; T ) d&gamma; T - - - ( 1 )
Step 3: make k=k+1, to each data terminal, calculate with formula (2)
Figure BDA00003565957600032
To voice terminal, calculate with formula (3)
Figure BDA00003565957600038
Figure BDA00003565957600033
Step 4: if
Figure BDA00003565957600034
Algorithm stops; Otherwise return step 3;
Wherein: in a single residential quarter cdma wireless multibusiness network system, N terminal wherein has N altogether DIndividual data terminal, N-N D=N VIndividual voice terminal; The speed of each terminal emission information is Rbps, and the bandwidth of spread-spectrum is WHz, and G=W/R is the spreading gain of this system; The grouping of each terminal is fixed as the M bit, and the information bit to be transmitted that wherein comprises is L and L＜M; Make Γ=1,2 ..., N} is the set of current terminal in the cellular cell, Γ D=1 ...., N DThe set of data terminal in the expression cellular cell, Γ V={ N D+ 1 ...., N} represents the set of voice terminal in the cellular cell;
Figure BDA00003565957600039
The transmitting power of data terminal j,
Figure BDA000035659576000310
The transmitting power that is voice terminal j represents; P jBe the strategy set of terminal j transmitting power, it is power level p that each terminal is selected its strategy j∈ P j
Figure BDA000035659576000311
,
Figure BDA000035659576000312
Be respectively the utility function of data terminal j and the utility function of voice terminal j.
Not Pareto optimality for the Nash Equilibrium based on the non-cooperative game power control algorithm in the multi-service wireless network, introduce the signal interference ratio concepts such as the best of data terminal, so that all data terminals all are operated in best waiting under the signal interference ratio in the system, voice terminal is operated under the target signal interference ratio thresholding of voice communications services quality threshold.Derive a new distributed power control algorithm based on signal interference ratios such as the bests.Experiment shows that this algorithm has obviously improved the service quality of system, and terminal all has relatively high effectiveness and lower transmitting power in the system, also so that the use of wireless network resource is more reasonable and fair.
In new algorithm of the present invention, system at first determines the best signal interference ratio that waits for system, and under the signal interference ratio conditions such as this best, each terminal is determined own final transmitting power.Simulation result shows that than the NPG algorithm, the BES algorithm not only greatly reduces the transmitting power of terminal, goes back so that the effectiveness of terminal is greatly enhanced simultaneously.
In the multi-service wireless network of the present invention based on the power control algorithm of the signal interference ratios such as the best, power control algorithm based on non-cooperative game in the multi-service wireless network is improved, introduce the signal interference ratio concepts such as the best of data terminal, so that all data terminals all are operated in best waiting under the signal interference ratio in the system, and voice terminal is operated under the target signal interference ratio thresholding of voice communications services quality threshold.Derive a new distributed power control algorithm based on signal interference ratios such as the bests.Studies show that new algorithm has obviously improved the service quality of system, terminal all has relatively high effectiveness and lower transmitting power in the system, also so that the use of wireless network resource is more reasonable and fair.
By as seen Fig. 2 and Fig. 3 are contrasted, than the HNPG algorithm, data terminal and voice terminal have all obtained with relatively low transmitting power and have had relatively high effectiveness in the HBES algorithm.By introducing the best concept that waits signal interference ratio in the multi-service wireless network, can effectively overcome in the HNPG algorithm terminal room to the blind competition of Radio Resource, thereby so that the distribution of Radio Resource is more reasonable and fair.

Claims (1)

  1. In the multi-service wireless network based on the power control algorithm of the signal interference ratios such as the best, it is characterized in that, comprise following step:
    Step 1: the initialization power vector is Initial time k=0;
    Step 2: the signal interference ratio γ such as the best of solution formula (1) established data terminal T
    Gf ( &gamma; T ) = [ G - ( N D - 1 ) &gamma; T ] &gamma; T df ( &gamma; T ) d&gamma; T - - - ( 1 )
    Step 3: make k=k+1, to each data terminal, calculate with formula (2)
    Figure FDA00003565957500013
    Figure FDA00003565957500014
    To voice terminal, calculate with formula (3)
    Figure FDA00003565957500015
    Figure FDA00003565957500016
    Step 4: if
    Figure FDA00003565957500017
    Algorithm stops; Otherwise return step 3;
    Wherein: in a single residential quarter cdma wireless multibusiness network system, N terminal wherein has N altogether DIndividual data terminal, N-N D=N VIndividual voice terminal; The speed of each terminal emission information is Rbps, and the bandwidth of spread-spectrum is WHz, and G=W/R is the spreading gain of this system; The grouping of each terminal is fixed as the M bit, and the information bit to be transmitted that wherein comprises is L and L＜M; Make Γ=1,2 ..., N} is the set of current terminal in the cellular cell, Γ D=1 ...., N DThe set of data terminal in the expression cellular cell, Γ V={ N D+ 1 ...., N} represents the set of voice terminal in the cellular cell;
    Figure FDA000035659575000110
    The transmitting power of data terminal j,
    Figure FDA00003565957500018
    The transmitting power that is voice terminal j represents; P jBe the strategy set of terminal j transmitting power, it is power level that each terminal is selected its strategy
    Figure FDA00003565957500019
    Be respectively the utility function of data terminal j and the utility function of voice terminal j.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101068121A (en) * 2007-06-04 2007-11-07 华为技术有限公司 Signal-to-interference ratio target value regulating method and device in outerloop power control
CN101102599A (en) * 2007-08-07 2008-01-09 北京天碁科技有限公司 An interface/signal ratio estimation method and device in communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101068121A (en) * 2007-06-04 2007-11-07 华为技术有限公司 Signal-to-interference ratio target value regulating method and device in outerloop power control
CN101102599A (en) * 2007-08-07 2008-01-09 北京天碁科技有限公司 An interface/signal ratio estimation method and device in communication system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
周元元: "无线数据网络中基于最佳等信干比的功率控制", 《万方数据学位论文》 *

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Application publication date: 20131016