CN105101226A - Femtocell network energy-saving method based on Coordinated Multiple Points Transmission - Google Patents

Femtocell network energy-saving method based on Coordinated Multiple Points Transmission Download PDF

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CN105101226A
CN105101226A CN201510570580.2A CN201510570580A CN105101226A CN 105101226 A CN105101226 A CN 105101226A CN 201510570580 A CN201510570580 A CN 201510570580A CN 105101226 A CN105101226 A CN 105101226A
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base station
home enodeb
user
base stations
home
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CN105101226B (en
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赵林靖
韩莹
张岗山
刘勤
李钊
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CERTUSNET CORP
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Xidian University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • 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

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

Abstract

The present invention discloses a femtocell network energy-saving method based on Coordinated Multiple Points Transmission, and mainly solves the problem of low energy-saving efficiency in the prior art. The femtocell network energy-saving method based on the Coordinated Multiple Points Transmission comprises the following implementation steps: 1) a base station assembly to be judged, a user assembly and a spectrum resource assembly are initialized, and a neighbor base station assembly is determined by the femtocell according to the collected user information and is reported to a center control unit; 2) required spectrum resource is distributed to each femtocell, and residual resource is served as a specialized cooperation resource; 3) base stations to be closed are selected according to the number of service users of the femtocells and the number of the neighbor base stations; 4) a cooperation cluster is established for the base stations to be closed, if an available cooperation resource exists and the base stations to be closed may be served by the cooperation cluster, the base station is closeable, otherwise the base station is not closeable; and 5) the base station assembly to be judged is updated, and it is determined whether the assembly is empty or not, if the assembly is not empty, it returns the step 3), otherwise the judgment of the on-off state of the femtocells is end. According to the invention, with improved energy-saving efficiency, the femtocell network energy-saving method based on the Coordinated Multiple Points Transmission may be used at the hot spot regions having intensive femtocells.

Description

Based on the home base station network power-economizing method of coordinated multipoint transmission
Technical field
The present invention relates to communication technical field, be specifically related to a kind of home base station network power-economizing method, can be used in the hot spot region of Home eNodeB dense distribution.
Background technology
In recent years, in order to meet the growing data transfer demands of user and increase the total capacity of network, operator deploys a large amount of low power nodes under traditional macro base station, as Microcell, picocell and Home eNodeB etc., especially in the hot spot region such as enterprise building, mall that user distribution is more, wall penetration loss due to signal causes macro base station cannot ensure the communication quality of indoor user, therefore usually disposes the quorum sensing inhibitor that a large amount of low power nodes ensures hot spot region.The present invention for the enterprise building of dense deployment Home eNodeB, and is applicable to the hot spot region of other low power nodes dense distribution.Due to the mobility of user and the sudden of data service, larger in the fluctuation in enterprise's building internal burden situation space in time, such as during working, the load of whole network is very heavy, quitting time then completely contradicts, and Home eNodeB is when being in non-loaded situation, its consume energy also can account for its business the busiest time 90 percent, there is the serious energy consumption wasting of resources in network by causing in this.Although the energy consumption of single Home eNodeB will be far smaller than macro base station, but according to research report, estimate that the turnover of Home eNodeB in 2016 can reach 26,000,000,000, the fast development of Home eNodeB causes the energy consumption of home base station network to waste problem cannot ignoring, and therefore becomes a urgent problem in wireless network the home base station network of hot spot region dense distribution is energy-conservation.
The characteristic of Home eNodeB also serves challenge to the energy-saving scheme band of home base station network while improving network performance, as less in Home eNodeB transmitting power, usually need to dispose a large amount of Home eNodeB to ensure covering in hot spot region, serious interference is there is between intensive Home eNodeB in this by causing, and the characteristic of Home eNodeB plug and play will cause the distribution of Home eNodeB irregular, the then degree that the is disturbed difference of each Home eNodeB, the power-economizing method therefore in cellular network can not directly apply to home base station network.
At present, hot issue is become about the energy saving research in home base station network.The method utilizing power to control in EURASIPJournalonWirelessCommunicationsandNetworking2011 " QoS-GuaranteedPowerControlMechanismBasedontheFrameUtiliz ationforFemtocells " literary composition as PavelM etc. is carried out energy-conservation, in conjunction with channel condition information, each Home eNodeB is that different channels distributes different transmitting powers, reduce the transmitting power on per bit, and then the power consumption reducing base station radio-frequency transmitter module realizes energy-conservation, but the ratio occupied in whole energy consumption of base station due to the power consumption of base station radio-frequency transmitter module is very little, the energy saved in this way is less.
BoYu etc. are in IEEEInternationalConferenceonCommunications2013 " EnergySavingAnalysisandEvaluationintheEnhancedLocalAreaA rchitecture " literary composition, have studied and the Home eNodeB of non-loaded or low load carried out closedown and come energy-conservation, and improve by neighbor base stations the service that transmitting power ensures to close user in base station.Although Home eNodeB is closed under low loading condition and can save a large amount of energy, but by single neighbor base stations be only user's service of closing in base station, the communication quality of user can not well be ensured, therefore the whole energy effect of this kind of method is unsatisfactory.
HanF etc. propose the power-economizing method of closing base station in IEEEInternationalConferenceonCommunications2012 " Energy-efficientCellularNetworkOperationviaBaseStationCo operation " literary composition in macro base station network, and in conjunction with the dynamic change situation of base station energy consumption situation and offered load, adopt coordinated multipoint transmission CoMP technology neighbor base stations to be formed cooperative cluster and work in coordination with as the user closed in base station provides service.Coordinated multipoint transmission CoMP technology is the core technology in LTE-A network, can the interference signal from neighbor base stations be changed into useful signal, therefore, it is possible to better meet the user rate demand of closing in base station, and then good energy-saving effect can be obtained in macro base station network, but the characteristic due to home base station network is different from macro base station network, this scheme cannot directly apply in home base station network.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, under the hot spot region of Home eNodeB dense distribution, a kind of home base station network power-economizing method based on coordinated multipoint transmission is proposed, with under the prerequisite of user communication quality in the Home eNodeB ensureing closed condition, improve the energy-saving efficiency of home base station network by closing Home eNodeB as much as possible.
Technical scheme of the present invention is achieved in that
One, know-why
Cooperative cluster ensure closed condition Home eNodeB in user communication quality prerequisite under, to minimize the Home eNodeB total energy consumption of whole network for target, according to the energy consumption model of Home eNodeB and the energy consumption of coordinated multipoint transmission, build the Mathematical Modeling minimizing the total energy consumption of home base station network:
min S Σ k = 1 K { s k P k o n + ( 1 - s k ) P k o f f } = min S Σ k = 1 K { s k ( P o + P s + ρm k ) + ( 1 - s k ) ( - 0.13 P s + 0.1 P s N k + 0.03 P s N k 2 + ρm k ) N k }
s k＝0
Wherein s krepresent the on off state of Home eNodeB k; represent energy consumption when Home eNodeB k normally opens, by fixing energy consumption P o, signal transacting energy consumption P sand load energy consumption composition, this load energy consumption is load Energy consumption factor ρ and service-user number m kproduct; represent the equivalent energy consumption after Home eNodeB k closedown, namely cooperative cluster adopts the additional energy that coordinated multipoint transmission technology produces; N krepresent the number comprising cooperative base station in cooperative cluster; RE c,krepresent the available cooperation resource collection of Home eNodeB k, Φ kthe all cooperative cluster ensureing Home eNodeB k user communication quality of set expression; Condition one represents the available cooperation resource RE of Home eNodeB k c,ksufficiently serve m kindividual user, condition two represents the cooperative cluster that must exist and ensure Home eNodeB k user communication quality, and when two conditions that and if only if meet simultaneously, Home eNodeB k can enter closed condition s k=0;
Adopt greedy algorithm, the Mathematical Modeling minimizing network total energy consumption is decomposed into the saving energy consumption maximizing single closedown base station
maxP k s a v e = m a x ( P k o n - P k o f f ) = max ( 0.13 P s N k - 0.1 P s N k 2 - 0.03 P s N k 3 + ( 1 - N k ) ρm k + P o + P s ) ;
To the saving energy consumption of single closedown base station ask local derviation, derive and close service-user number m kminimum Home eNodeB k, and by comprising cooperative base station number N kminimum cooperative cluster is that Home eNodeB k serves, and obtains maximum saving energy consumption by closing Home eNodeB k close the condition twos that will meet from Home eNodeB, analyze the Home eNodeB showing that preferential closedown neighbor base stations number is few, can ensure that more Home eNodeB is closed energy-conservation.Therefore the on off state of service-user number and the few Home eNodeB of neighbor base stations number is preferentially judged, and from multiple alternative cooperative cluster, select to comprise the final service collaboration bunch of the minimum conduct of number of base stations for closable Home eNodeB, to reach the object improving home base station network energy-saving efficiency.
Two, technical scheme
According to above-mentioned know-why, performing step of the present invention comprises as follows:
(1) system initialization: supposing the system has Q Home eNodeB, treat judgement Home eNodeB set B={1,2 .., k .., Q} represent, initialization all Home eNodeB k ∈ B is opening s k=1, and by user's set expression of Home eNodeB k be available spectrum resources general collection in initialization home base station network is combined into RE, wherein m krepresent the total number of users of access to family base station k;
(2) Home eNodeB k collects channel condition information, the white noise information of user, determines its neighbor base stations set D k, and send these information to centralized control unit;
(3) for each Home eNodeB k distributes frequency spectrum resource block: centralized control unit adds up the frequency spectrum resource block number needed for each Home eNodeB, adopt " painting theory of figure " to distribute the Resource Block orthogonal with its neighbor base stations for Home eNodeB k, and institute's Resources allocation block is added the Resource Block set RE of base station k kin;
(4) the reserved collaboration frequency spectrum resource collection RE adopting coordinated multipoint transmission CoMP technology-specific c: all frequency spectrum resource blocks distributed remove by centralized control unit from the total resources set RE home base station network, and remaining frequency spectrum resource are added cooperation resource collection RE cin, namely
(5) from treating to select to wait to close base station k judgement Home eNodeB set B *: prioritizing selection service-user number m kminimum Home eNodeB closes base station, i.e. k as waiting *=argminm kif the service-user number that there is multiple Home eNodeB equals the Home eNodeB of neighbor base stations minimum number is then therefrom selected to close base station k as waiting *;
(6) neighbor base stations is supposed for when other close base stations service, cooperation resource collection is then obtain waiting to close base station k *available cooperation resource is: base station k is closed if wait *available cooperation resource enough service Home eNodeB k *in individual user, then perform step (7), otherwise, Home eNodeB k *can not close, perform step (8);
(7) base station k is closed for waiting *create cooperative cluster and judge base station k *on off state:
(7a) from waiting to close base station k *neighbor base stations set the alternative cooperative base station of middle selection: the number of users threshold value m that setting Home eNodeB can be served thres, and will opening s be in j=1 and meet neighbor base stations join alternative cooperative base station set in;
(7b) alternative cooperative base station set is supposed in total g thresindividual alternative cooperative base station, combines α base station any in set, can obtain altogether individual cooperative cluster, namely wherein 2≤α≤g thres;
(7c) Λ is established ηrepresent η cooperative cluster, calculate and wait to close base station k *user at cooperative cluster Λ ηunit frequency spectrum speed during service wherein user
(7d) the threshold value R of Subscriber Unit frequency spectrum speed is set thres, will meet simultaneously with the cooperative cluster of condition, as alternative cooperative cluster, joins alternative cooperative cluster set in, and make the following judgment:
If alternative cooperative cluster set then Home eNodeB k *can close, from alternative cooperative cluster set middle selection comprises the minimum alternative cooperative cluster of cooperative base station and closes base station k as waiting *service collaboration bunch otherwise Home eNodeB k *can not close;
(8) if Home eNodeB k *can close, then upgrade base station k *state be by base station k *with cooperative base station from waiting that adjudicating collection of base stations B removes, upgrade cooperative base station service-user number and special cooperation resource service condition, namely m j = m j + m k * , RE c j = RE c j ∪ RE c , k * , j ∈ Λ k * , And by Home eNodeB k *the resource collection RE of release after closing kin do not joined cooperation resource collection RE by the resource that other Home eNodeB use cin;
If Home eNodeB k *for closing, by Home eNodeB k *from treating that judgement collection of base stations B removes;
Judge to treat whether judgement collection of base stations B is empty, if then the on off state of all Home eNodeB judges to terminate, otherwise, return step (5).
Compared with prior art, tool has the following advantages in the present invention:
1) the present invention adopt coordinated multipoint transmission technology to be closed condition Home eNodeB in user service is provided, under the prerequisite of communication quality ensureing user, closed portion Home eNodeB carries out energy-conservation, compared with existing energy-saving scheme, can obtain better energy-saving efficiency.
2) the present invention selects to close base station according to the service-user number of Home eNodeB and its neighbor base stations number, and avoid the same layer interference between neighbor base stations by Resourse Distribute, compared with the conventional method, the intensive and random hot spot region that distributes of Home eNodeB is more suitable for.
Accompanying drawing explanation
Fig. 1 is application scenarios figure of the present invention;
Fig. 2 is implementing procedure figure of the present invention;
Fig. 3 is simulating scenes figure of the present invention
Fig. 4 is the total energy consumption comparison diagram that the present invention and existing energy-saving scheme change with number of users total in home base station network;
Fig. 5 is the present invention along with base station density in home base station network and total number of users change the whole network energy-saving efficiency chart obtained.
Embodiment
Referring to accompanying drawing, technical scheme of the present invention and effect are described further:
With reference to Fig. 1, the scene that realizes of the present invention meets by disposing Home eNodeB the enterprise building covered, and for simulating actual enterprise's building planning, room-size has different sizes.Suppose to be total to Q Home eNodeB in this enterprise building, be randomly dispersed in any room in building, Home eNodeB set is by B={1, and 2 .., k .., Q} represent, and by all Home eNodeB of centralized control unit unified management; The user that in system, random distribution is some, user determines the Home eNodeB oneself accessed according to received signal strength RSRP size.In order to avoid the cross-layer interference between cellular network and home network, home base station network and cellular network use orthogonal resource.
With reference to Fig. 2, performing step of the present invention is as follows:
Step 1: system initialization.
Supposing the system has Q Home eNodeB, and treat judgement Home eNodeB set B={1,2 .., k .., Q} represent, initialization all Home eNodeB k ∈ B is opening s k=1; The Home eNodeB access that user selects received signal strength RSRP maximum, by local user's set expression of Home eNodeB k ∈ Λ is: wherein m krepresent the total number of users of access to family base station k; Available spectrum resources block general collection in initialization home base station network is combined into RE.
Step 2: Home eNodeB k collects channel condition information, the white noise information of user, determines neighbor base stations set D k, and send these information to centralized control unit.
Step 3: centralized control unit calculates the resource block number of each Home eNodeB demand, and adopt " painting theory of figure " frequency spectrum resource block needed for each Home eNodeB k distribution.
3a) centralized control unit adds up the resource block number needed for each Home eNodeB: set each user and distribute a Resource Block, then the resource block number needed for each Home eNodeB k equals service-user number m k;
3b) according to the neighbor base stations set D of Home eNodeB k kgenerate interference figure, in interference figure, point represents Home eNodeB, and two some linear lists show that two base stations are neighbor base stations, and mutually disturb;
3c) set different colours and represent different Resource Block, give the color of each distribution resource requirement number of blocks successively, and interconnective 2 are distributed different colors, each Home eNodeB is assigned to the Resource Block orthogonal with its neighbor base stations, and institute's Resources allocation block is added the Resource Block set RE of Home eNodeB k kin.
Step 4: all frequency spectrum resource blocks distributed remove by centralized control unit from the total resources set RE home base station network, and remaining frequency spectrum resource block is added the cooperation resource collection RE of coordinated multipoint transmission technology-specific cin, namely RE c = R E - ∪ k ∈ B RE k .
Step 5: centralized control unit is from treating to select to wait to close base station k judgement Home eNodeB set B *.
Prioritizing selection service-user number m kminimum Home eNodeB closes base station as waiting, if only there is the service-user minimum number of one family base station, then waits that closing base station is k *=argminm k, otherwise from the Home eNodeB of multiple service-user minimum number, select the Home eNodeB of neighbor base stations minimum number to close base station k as waiting *.
Step 6: calculate and wait to close base station k *available collaboration frequency spectrum resource, and according to collaboration frequency spectrum resource adjudicate in advance wait close base station k *on off state.
Suppose neighbor base stations for when other close base stations service, cooperation resource collection is then obtain waiting to close base station k *available cooperation resource is: base station k is closed if wait *available cooperation resource enough service Home eNodeB k *in individual user, then perform step 7, otherwise, Home eNodeB k *can not close, perform step 8.
Step 7: close base station k according to waiting *neighbor base stations set create cooperative cluster, and judge to wait to close base station k *on off state.
7a) from waiting to close base station k *neighbor base stations set the alternative cooperative base station of middle selection: the number of users threshold value m that setting Home eNodeB can be served thres, and will opening s be in j=1 and meet neighbor base stations join alternative cooperative base station set in;
7b) suppose alternative cooperative base station set in total g thresindividual alternative cooperative base station, combines α base station any in set, can obtain altogether individual cooperative cluster, namely wherein 2≤α≤g thres;
7c) establish Λ ηrepresent η cooperative cluster, adopt shannon formula to calculate cooperative cluster Λ ηfor waiting to close base station k *user when serving, user accessible unit frequency spectrum speed
R u k * , i Λ η = log 2 ( 1 + | | Σ j ∈ Λ η h u k * , i j W j P j | | 2 σ 2 + P I )
Wherein user p jrepresent the transmitting power of Home eNodeB j, represent that Home eNodeB j is to user channel matrix, W jthat Home eNodeB j is to user transmission encoder matrix, σ 2represent white noise power, P irepresent the co-channel interference from all non-neighbor base stations that user is subject to;
7d) set the threshold value R of Subscriber Unit frequency spectrum speed thres, will meet simultaneously with the cooperative cluster of condition, as alternative cooperative cluster, joins alternative cooperative cluster set in, and make the following judgment:
If alternative cooperative cluster set then Home eNodeB k *can close, from alternative cooperative cluster set middle selection comprises the minimum alternative cooperative cluster of cooperative base station and closes base station k as waiting *service collaboration bunch otherwise Home eNodeB k *can not close.
Step 8: close base station k according to waiting *the court verdict of on off state, upgrades system resource.
If 8a) Home eNodeB k *can close, then upgrade base station k *state be by base station k *with cooperative base station from waiting that adjudicating collection of base stations B removes, upgrade cooperative base station service-user number and special cooperation resource service condition, namely m j = m j + m k * , RE c j = RE c j ∪ RE c , k * , j ∈ Λ k * , And by Home eNodeB k *the resource collection RE of release after closing kin do not joined cooperation resource collection RE by the resource that other Home eNodeB use c; If Home eNodeB k *for closing, by Home eNodeB k *from treating that judgement collection of base stations B removes;
8b) judge to treat whether judgement collection of base stations B is empty, if then the on off state of all Home eNodeB judges to terminate, otherwise, return step 5.
Effect of the present invention can be further illustrated by emulation:
One. simulation parameter is set, as following table
2) content and result is emulated
Have employed two kinds of contrast algorithms in simulation process, wherein contrasting algorithm one is with reference to IEEEWCNC2010 " ImprovingEnergyEfficiencyofFemtocellBaseStationsviaUserA ctivityDetection ", is undertaken energy-conservation by the Home eNodeB without service-user by closed portion device; Contrast algorithm two is with reference to IEEEICC2013 " EnergySavingAnalysisandEvaluationintheEnhancedLocalAreaA rchitecture ", the Home eNodeB some being in low load condition carries out closedown and comes energy-conservation, and increase area coverage by the neighbor base stations of closed condition Home eNodeB by improving transmitting power, ensure the communication quality of user in the Home eNodeB of closing.
Emulation 1, the Home eNodeB number disposed in fixed system is 48, and Home eNodeB is randomly dispersed in the room in whole region.When total service-user in home base station network is changed to 200 by 0, Home eNodeB total energy consumption in adopting the present invention and adopting the whole home base station network after contrasting algorithm one and contrast algorithm two is emulated, obtain Home eNodeB energy simulation comparison diagram, result is as Fig. 4.
As seen from Figure 4, when total service-user number in home base station network is changed to 200 by 0, Home eNodeB total energy consumption curve of the present invention is starkly lower than contrast algorithm one and contrast algorithm two, therefore can learn that the present invention is compared with contrast algorithm, better energy-saving effect can be obtained, and the Home eNodeB total energy consumption of the present invention and contrast algorithm increases along with total service-user total number and increases, this illustrative system internal burden is lower, and system energy consumption is lower;
Emulation 2, definition energy-saving efficiency is the energy consumption and the ratio without total energy consumption under operational circumstances that adopt algorithm of the present invention to save, 56 are changed to from 16 in base station scale, when total number of users in home base station network is changed to 200 by 0, energy-saving efficiency in the present invention is emulated, obtain adopting energy-saving efficiency figure of the present invention, result as shown in Figure 5.
As seen from Figure 5, when hot spot region scene is fixing, 56 are increased to from 16 along with base station scale, Home eNodeB is disposed more, energy-saving efficiency of the present invention is higher, and being changed to 200 by 0 along with the total number of users of system service, energy-saving efficiency of the present invention is in reduction, and this shows that the present invention can obtain higher energy-saving efficiency when family's base station deployment is intensive and load is low.

Claims (4)

1., based on a home base station network power-economizing method for coordinated multipoint transmission, comprise the steps:
(1) system initialization: supposing the system has Q Home eNodeB, treat judgement Home eNodeB set B={1,2 .., k .., Q} represent, initialization all Home eNodeB k ∈ B is opening s k=1, and by user's set expression of Home eNodeB k be available spectrum resources general collection in initialization home base station network is combined into RE, wherein m krepresent the total number of users of access to family base station k;
(2) Home eNodeB k collects channel condition information, the white noise information of user, determines its neighbor base stations set D k, and send these information to centralized control unit;
(3) for each Home eNodeB k distributes frequency spectrum resource block: centralized control unit adds up the frequency spectrum resource block number needed for each Home eNodeB, adopt " painting theory of figure " to distribute the Resource Block orthogonal with its neighbor base stations for Home eNodeB k, and institute's Resources allocation block is added the Resource Block set RE of base station k kin;
(4) the reserved collaboration frequency spectrum resource collection RE adopting coordinated multipoint transmission CoMP technology-specific c: all frequency spectrum resource blocks distributed remove by centralized control unit from the total resources set RE home base station network, and remaining frequency spectrum resource are added cooperation resource collection RE cin, namely
(5) from treating to select to wait to close base station k judgement Home eNodeB set B *: prioritizing selection service-user number m kminimum Home eNodeB closes base station, i.e. k as waiting *=argminm kif the service-user number that there is multiple Home eNodeB equals the Home eNodeB of neighbor base stations minimum number is then therefrom selected to close base station k as waiting *;
(6) neighbor base stations is supposed for when other close base stations service, cooperation resource collection is then obtain waiting to close base station k *available cooperation resource is: base station k is closed if wait *available cooperation resource enough service Home eNodeB k *in individual user, then perform step (7), otherwise, Home eNodeB k *can not close, perform step (8);
(7) base station k is closed for waiting *create cooperative cluster and judge base station k *on off state:
(7a) from waiting to close base station k *neighbor base stations set the alternative cooperative base station of middle selection: the number of users threshold value m that setting Home eNodeB can be served thres, and will opening s be in j=1 and meet neighbor base stations join alternative cooperative base station set in;
(7b) alternative cooperative base station set is supposed in total g thresindividual alternative cooperative base station, combines α base station any in set, can obtain altogether individual cooperative cluster, namely wherein 2≤α≤g thres;
(7c) Λ is established ηrepresent η cooperative cluster, calculate and wait to close base station k *user at cooperative cluster Λ ηunit frequency spectrum speed during service wherein 0 < &eta; &le; y k * , User u k * , i &Element; U k * ;
(7d) the threshold value R of Subscriber Unit frequency spectrum speed is set thres, will meet simultaneously with the cooperative cluster of condition, as alternative cooperative cluster, joins alternative cooperative cluster set in, and make the following judgment:
If alternative cooperative cluster set then Home eNodeB k *can close, from alternative cooperative cluster set middle selection comprises the minimum alternative cooperative cluster of cooperative base station and closes base station k as waiting *service collaboration bunch otherwise Home eNodeB k *can not close;
(8) if Home eNodeB k *can close, then upgrade base station k *state be by base station k *with cooperative base station from waiting that adjudicating collection of base stations B removes, upgrade cooperative base station service-user number and special cooperation resource service condition, namely m j = m j + m k * , RE c j = RE c j &cup; RE c , k * , j &Element; &Lambda; k * , And by Home eNodeB k *the resource collection RE of release after closing kin do not joined cooperation resource collection RE by the resource that other Home eNodeB use cin;
If Home eNodeB k *for closing, by Home eNodeB k *from treating that judgement collection of base stations B removes;
Judge to treat whether judgement collection of base stations B is empty, if then the on off state of all Home eNodeB judges to terminate, otherwise, return step (5).
2. the home base station network power-economizing method based on coordinated multipoint transmission according to claim 1, wherein said step 3) centralized control unit adds up frequency spectrum resource block number needed for each Home eNodeB: be that each user of setting distributes a Resource Block, then the resource block number needed for each Home eNodeB k equals service-user number m k.
3. the home base station network power-economizing method based on coordinated multipoint transmission according to claim 1, wherein said step 3) middle adopt " painting theory of figure " carries out Resourse Distribute, is the neighbor base stations set D according to Home eNodeB k kgenerate interference figure, in interference figure, point represents Home eNodeB, and two some linear lists show that two neighbor base stations disturb mutually; Setting different colours represents different Resource Block, and give the color of each distribution resource requirement number of blocks successively, and distribute different colors at interconnective 2, final each Home eNodeB is assigned to the Resource Block set orthogonal with its neighbor base stations.
4. the home base station network power-economizing method based on coordinated multipoint transmission according to claim 1, wherein said step 7c) in calculate and wait to close base station k *user at a bunch Λ ηunit frequency spectrum speed during service following shannon formula is adopted to calculate:
R u k * , i &Lambda; &eta; = log 2 ( 1 + | | &Sigma; j &Element; &Lambda; &eta; h u k * , i j W j P j | | 2 &sigma; 2 + P I )
Wherein, P jrepresent the transmitting power of Home eNodeB j, represent that Home eNodeB j is to user channel matrix, W jthat Home eNodeB j is to user transmission encoder matrix, σ 2represent white noise power, P irepresent the co-channel interference from all non-neighbor base stations that user is subject to.
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