CN103391604B - The control method of little base station dormancy - Google Patents

Abstract

The invention discloses a kind of control method of little base station dormancy, comprising: 1) detect the load value in little base station range; 2) load value detected according to step 1) sets the frequency spectrum threshold value of little base station activation; 3) idle frequency spectrum resource is detected; 4) according to the load value detected, and the magnitude relationship of the frequency spectrum threshold value of described idle frequency spectrum resource and setting, control the opening and closing of the radio frequency component of little base station, thus make little base station operation in activation or resting state.Traffic carrying capacity in idle frequency spectrum resource and little base station range is combined as the controlled condition of little base station dormancy by the control method of the little base station dormancy of the present invention, effectively prevent invalid activation that little base station causes because of idle frequency spectrum inadequate resource or the frequency spectrum resource of multiplexing surrounding user by force after activating simultaneously, be conducive to reducing network energy consumption, improve the energy efficiency of system.

Description

The control method of little base station dormancy

Technical field

The present invention relates to wireless communication technology field, particularly a kind of control method of little base station dormancy.

Background technology

Along with the arrival in the mobile data service epoch popularized and reform of Intelligent mobile equipment, the requirement of people to wide-band mobile communication is more and more higher.Little base station network comprises microcellulor, Pico cell etc., can capacity and coverage rate, can be used for busy area, absorbs traffic carrying capacity, or is applied to blind spot area, supplements and covers, also can carry out the covering in some areas, as city covers and suburb covering.The introduction of little base station network can meet the requirement of people to huge data capacity and high-quality service, again because it has easy deployment, the feature of low cost, has development prospect, the research of little base station network develop and field becomes the focus of current industrial circle and academia's research, and achieve standardizing body, as: the3 ^rdgenerationPartnershipProject (3GPP), LongTermEvolution(LTE) and concern LongTermEvolution-Advanced(LTE-A) etc.

Because the band resource of wireless communication field is limited, little base station network can with macro base station Web vector graphic same frequency, add the availability of frequency spectrum of system.But adopt the method for this channeling, little base station user is subject to the serious interference from macro base station, causes user communication quality to reduce.For ensureing little base station user communication quality, little base station generally adopts maximum transmission power.Therefore, the deployment of extensive little base station network can cause network energy consumption sharply to increase.From biological environment and economic angle, the increase of energy consumption adds the discharge of atmospheric greenhouse gas, energy savings on the one hand, realizes the important directions that " green communications " are wireless communication field research.On the other hand, operator or user are necessary for these energy consumptions and pay huge expense.Therefore, the energy loss problem reducing little base station network is an emphasis direction of current little base station network research.

Usually according to the user situation in little base station range in existing technology, Dynamic Selection is opened or is closed the radio-frequency receiving-transmitting assembly of little base station, and control the unlatching/sleep state of little base station, the little base station dormancy making traffic carrying capacity little is to reduce energy consumption.The control method of current little base station dormancy mainly contains radio-frequency receiving-transmitting assembly dynamic switch method and discontinuous transmission method (DTX), and wherein discontinuous transmission method comprises discontinuous transmission method (E-DTX) and the multiple cell discontinuous transmission method (MC-DTX) of improvement.

The activation of little base station must to have enough available frequency spectrum resource as prerequisite.If there is no enough frequency spectrum resources for use, the invalid activation in little base station can be caused, namely after finding after activating that not having enough frequency spectrums to use turns back to resting state or activation again, by force multiplexing surrounding user frequency spectrum resource and cause channel disturbance serious, finally cause the energy efficiency of system to reduce.When energy efficiency refers to base station and telex network required power loss and transmission rate and ratio, represent the power loss needed for unit of transfer's data volume.Power loss increment when energy efficiency growth trend refers to base station and telex network and the ratio of transmission rate and increment, be used for the increase trend of energy efficiency of reflection system.

The frequency spectrum resource of little base station has following four kinds of sources usually: little base station and macro base station share spectrum resources, little base station uses special frequency spectrum resource, little base station and macro base station share spectrum resources, and little base station uses the frequency spectrum resource perceived based on cognitive radio frequency spectrum cognition technology.The radio-frequency receiving-transmitting assembly dynamic switch method of prior art, discontinuous transmission method, comprise the discontinuous transmission method of improvement and multiple cell discontinuous transmission method and make reasonable assumption all not to frequency spectrum source, the frequency spectrum that little base station uses is assigned with.Therefore, when idle frequency spectrum inadequate resource, cause the invalid activation in little base station or after activating, by force multiplexing surrounding user frequency spectrum resource and cause channel disturbance serious, finally cause system energy efficiency to reduce, user communication quality reduction.

Summary of the invention

The present invention proposes a kind of control method of little base station dormancy, in order to multiplexing user's frequency spectrum resource around and problem that the interference that causes and system energy efficiency reduce by force after solving the medium and small base station activation of prior art.

The control method of a kind of little base station dormancy provided by the invention, comprising:

1) load value in little base station range is detected;

2) load value detected according to step 1) sets the frequency spectrum threshold value of little base station activation;

3) idle frequency spectrum resource is detected;

4) according to the load value detected, and the magnitude relationship of the frequency spectrum threshold value of described idle frequency spectrum resource and setting, make following judgement:

When 4-1) little base station is in resting state: the load value in little base station range is non-vanishing, and idle frequency spectrum resource is greater than the frequency spectrum threshold value of setting, then little base station radio-frequency transmitting-receiving subassembly is opened, and little base station activation enters state of activation; Otherwise little base station continues to keep resting state;

When 4-2) little base station is in state of activation: the load value in little base station range be zero or idle frequency spectrum resource be less than the frequency spectrum threshold value of setting, little base station radio-frequency transmitting-receiving subassembly is closed, and little base station enters resting state; Otherwise little base station continues to keep state of activation.

Traffic carrying capacity in its coverage and idle frequency spectrum resource are detected in little base station, and using idle frequency spectrum resource one of them condition as little base station activation, the controlled condition of little base station dormancy is combined as with the traffic carrying capacity in little base station range, close the little base station that traffic carrying capacity is little, be conducive to reducing network energy consumption, consider again utilizable idle frequency spectrum resource simultaneously, effectively prevent invalid activation that little base station causes because of idle frequency spectrum inadequate resource or the frequency spectrum resource of multiplexing surrounding user by force after activating, and cause channel disturbance serious, the problem that user communication quality reduces.

Step 2) in utilize cognitive radio frequency spectrum cognition technology to detect idle frequency spectrum resource.The frequency spectrum resource that cognition wireless frequency spectrum perception technology perception arrives, as the frequency spectrum source after little base station activation, improves the availability of frequency spectrum.

Described cognitive radio frequency spectrum cognition technology is the cognitive radio frequency spectrum cognition technology based on energy measuring.Cognitive radio frequency spectrum cognition technology based on energy measuring adopts energy measuring, is incoherent detection, less demanding to Phase synchronization, is easy to realize.

The detection method of the load value in described little base station range is that user initiatively sends service request method or little base station cycle detection business method.User initiatively sends service request method and refers to that the user terminal in little base station range initiatively sends access request to little base station before will accessing little base station, and this user initiatively sends the cycle detection that service request method does not need little base station, low to the requirement of base station; Little base station cycle detection then represents that user terminal does not initiatively send this solicited message, and detected the existence whether having user terminal by little base station active cycle, the requirement of detection to base station of this circulation is high, and base station needs more signaling loss.

As preferably, described traffic carrying capacity is the number of users in little base station range.The detection method of number of users is simple, is easy to realize.

As preferably, described frequency spectrum threshold value is channel number, and described idle frequency spectrum resource is idle channel number.Implementation method is simple, and contributes to the processing speed of raising system.

Described channel number passes through solving equation $\frac{P_0+{\mathrm{\Δ}}_p{N}_{\mathrm{th}}{P}_{\max }-P_{\mathrm{sleep}}}{\frac{N_{\mathrm{th}}}{N}W\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\log }_2(1+\frac{P_{\max }{g}_i}{N_{0}W})}=\frac{{\mathrm{\Δ}}_{p_0}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{N_0\mathrm{W\Γ}}{g_{0i}}}{\mathrm{NW}{\log }_2(1+\mathrm{\Γ})}$ Obtain, wherein: N _thfor frequency spectrum threshold value, N is the number of users in little base station range, P ₀represent little base station minimum emissive power in active state, P _maxrepresent that little base station is to the transmitting power of unique user in some frequency ranges, P _sleepfor little base station power output in the dormant state, △ _prepresent the degree of dependence of power output to load of little base station, for macro base station power output is to the degree of dependence of load, g _0irepresent the channel gain of macro base station to user i, g _ifor little base station is to the channel gain of user i, W is channel width, and Γ is the signal to noise ratio requirement of user, N ₀for background noise.

The definition base energy efficiency optiaml ciriterion of frequency spectrum threshold value, detailed process is as follows:

Suppose that the idle frequency spectrum resource detecting is equal with frequency spectrum threshold value, then little base station is in critical condition, just activates unlatching, now the energy efficiency growth trend △ ε of system _oNwith the energy efficiency growth trend △ ε of system during dormancy _oFFequal, that is:

△ε _ON=△ε _OFF（1）

According to definition, the energy efficiency growth trend of system when little base station is opened:

${\mathrm{\Δ\ϵ}}_{\mathrm{ON}}=\frac{\mathrm{\Δ}{R}_{\mathrm{ON}}}{\mathrm{\Δ}{P}_{\mathrm{ON}}}---\left(2\right)$

Wherein, the power loss increment of little base station:

△P _ON=P ₀+△ _pN _thP _max-P _sleep（3）

The transmission rate of i-th user under the opening of little base station:

$R_i=\frac{N_{\mathrm{th}}}{N}W{\log }_2(1+\frac{P_{\max }{g}_i}{N_{0}W}),\∀i\∈\{\mathrm{1,2},\·\·\·,N\}---\left(4\right)$

Then the transmission rate of little base station and increment are:

${\mathrm{\ΔR}}_{\mathrm{ON}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{R}_i=\frac{N_{\mathrm{th}}}{N}W\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\log }_2(1+\frac{P_{\max }{g}_i}{N_{0}W})---\left(5\right)$

(3) and (5) are substituted into (2) can obtain;

${\mathrm{\Δ\ϵ}}_{\mathrm{ON}}=\frac{{\mathrm{\ΔR}}_{\mathrm{ON}}}{{\mathrm{\ΔP}}_{\mathrm{ON}}}=\frac{P_0+{\mathrm{\Δ}}_p{N}_{\mathrm{th}}{P}_{\max }-P_{\mathrm{sleep}}}{\frac{N_{\mathrm{th}}}{N}W\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\log }_2(1+\frac{P_{\max }{g}_i}{N_{0}W})}---\left(6\right)$

According to definition, the energy efficiency growth trend of system during little base station dormancy:

${\mathrm{\Δ\ϵ}}_{\mathrm{OFF}}=\frac{{\mathrm{\ΔP}}_{\mathrm{OFF}}}{{\mathrm{\ΔR}}_{\mathrm{OFF}}}---\left(7\right)$

The transmitting power of macro base station to i-th user after power controls:

$P_{0i}=\frac{N_0\mathrm{W\Γ}}{g_{0i}}---\left(8\right)$

Then the power loss increment of macro base station is:

${\mathrm{\ΔP}}_{\mathrm{OFF}}={\mathrm{\Δ}}_{p_0}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{P}_{0i}={\mathrm{\Δ}}_{p_0}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{N_0\mathrm{W\Γ}}{g_{0i}}---\left(9\right)$

The transmission rate of user i under macrocellular is:

R _0i=Wlog ₂(1+Γ)（10）

The then transmission rate of macro base station and increment:

${\mathrm{\ΔR}}_{\mathrm{OFF}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{R}_{0i}=\mathrm{NW}{\log }_2(1+\mathrm{\Γ})---\left(11\right)$

(9) and (11) are substituted into (7) can obtain;

${\mathrm{\Δ\ϵ}}_{\mathrm{OFF}}=\frac{{\mathrm{\ΔP}}_{\mathrm{OFF}}}{{\mathrm{\ΔR}}_{\mathrm{OFF}}}=\frac{{\mathrm{\Δ}}_{p_0}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{N_0\mathrm{W\Γ}}{g_{0i}}}{\mathrm{NW}{\log }_2(1+\mathrm{\Γ})}---\left(12\right)$

Then (1) can be expressed as:

$\frac{P_0+{\mathrm{\Δ}}_p{N}_{\mathrm{th}}{P}_{\max }-P_{\mathrm{sleep}}}{\frac{N_{\mathrm{th}}}{N}W\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\log }_2(1+\frac{P_{\max }{g}_i}{N_{0}W})}=\frac{{\mathrm{\Δ}}_{p_0}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{N_0\mathrm{W\Γ}}{g_{0i}}}{\mathrm{NW}{\log }_2(1+\mathrm{\Γ})}---\left(13\right)$

Finally solve (13) and obtain frequency spectrum threshold value N _th.

The dormancy that the method that little base station dormancy of the present invention controls both had achieved little base station controls, reduce energy consumption, the energy efficiency of raising system, also the frequency spectrum resource of the invalid activation of little base station when frequency spectrum resource is not enough or other users multiplexing is by force avoided, reduce interference, ensure that the communication quality of user.

Accompanying drawing explanation

Fig. 1 is the flow chart of the method that little base station dormancy provided by the invention controls;

Fig. 2 is the graph of a relation of the energy efficiency growth trend of the present embodiment and prior art systems.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, also the present invention is described in further detail by reference to the accompanying drawings hereby to enumerate preferred embodiment.

As shown in Figure 1, the control method of the little base station dormancy of the present embodiment, comprising:

A control method for little base station dormancy, comprising:

1) number of users in little base station range is detected;

2) load value detected according to step 1) sets the frequency spectrum threshold value of little base station activation;

3) idle frequency spectrum resource is detected;

4) according to the load value detected, and the magnitude relationship of the frequency spectrum threshold value of described idle frequency spectrum resource and setting, make following judgement:

When 4-1) little base station is in resting state: the load value in little base station range is non-vanishing, and idle frequency spectrum resource is greater than the frequency spectrum threshold value of setting, then little base station radio-frequency transmitting-receiving subassembly is opened, and little base station activation enters state of activation; Otherwise little base station continues to keep resting state;

When 4-2) little base station is in state of activation: the load value in little base station range be zero or idle frequency spectrum resource be less than the frequency spectrum threshold value of setting, little base station radio-frequency transmitting-receiving subassembly is closed, and little base station enters resting state; Otherwise little base station continues to keep state of activation.

In little base station range, number of users adopts base station cycle detection business method.The per interval T in little base station, detects the quantity of user in little base station range, T=10ms in the present embodiment by energy detector.

Idle frequency spectrum resource adopts the frequency spectrum sensing method based on energy measuring, namely in designated frequency band, adopts energy measuring method to detect the quantity of idle sub-channels.Judge to be at a time whether channel exists authorized user in communication, if not, judge that this channel is as idle sub-channels according to how graceful-Pearson criterion.

Frequency spectrum threshold value in the present embodiment is channel number, and idle frequency spectrum resource is idle channel number, and technology scene is as follows:

In single macrocellular TD-LTE system, the coverage of macro base station is 500m, 6 little base station random distribution are had in macro base station coverage, the coverage of little base station is 50m, 150 user terminal random distribution, have 50 sub-channels can supply to utilize, the bandwidth W=5MHz of every sub-channels, all users have identical signal-to-noise target value Γ=3.5.Background noise is white Gaussian noise N ₀=-174dBm/Hz.The power output of little base station is to the degree of dependence △ of load _p=15, the power output of macro base station is to the degree of dependence △ of load _p0=14.5.

Suppose that the user's number in the little base station range that detects is N, for the idle frequency spectrum resource perceived, N number of user is multiplexing in the mode of TDMA, and the frequency resource perceived under the principle of time slot equality is divided evenly to N number of little base station user.If the frequency spectrum threshold value of little base station activation is N _th.

When macro base station performs downlink power control, macro base station to the path loss of user is:

PL ₀(dB)=128+35log ₁₀d（1）

Wherein d is the distance between transmitter and receiver (i.e. user), and unit is km.

With single little base station wherein for analytic target, suppose that little base station is open, launch with maximum transmission power, do not consider the same layer interference between adjacent little base station, each user uses a channel, then little base station can be expressed as to the path loss model of user:

PL ₁(dB)=128+25log ₁₀d（2）

The power loss of little base station when activation and dormancy is:

$P=\left\{\begin{array}{c}{P}_0+{\mathrm{\Δ}}_p{\mathrm{NP}}_{\max };\\ P_{\mathrm{sleep}}\·\end{array}\right.---\left(3\right)$

Wherein, P ₀represent little base station minimum emissive power in the on state, P _maxrepresent the transmitting power of little base station to user; P _sleepfor little base station corresponding power output in the dormant state.P in the present embodiment ₀=1W, P _sleep=0.15W, P _max=1W.In the present embodiment, threshold value obtains by the following method:

(1) during little base station dormancy, user is accessed by macro base station, and now the energy loss increment of system equals the energy loss increment of macro base station, and Γ represents the signal to noise ratio requirement of user, when user is accessed by macro base station, the signal to noise ratio that macro base station controls to meet user by power requires:

$\mathrm{\Γ}=\frac{P_{0i}{g}_{0i}}{N_{0}W}---\left(4\right)$

P _0ifor the transmitting power of macro base station to i-th user after overpower controls, then have:

$P_{0i}=\frac{N_0\mathrm{W\Γ}}{g_{0i}}---\left(5\right)$

Wherein, g _0ifor macro base station is to the channel gain of user i.Its fading model is determined by path loss model i.e. (1) of macro base station to user.

When number of users is N, the power loss increment of system is:

${\mathrm{\ΔP}}_{\mathrm{OFF}}={\mathrm{\Δ}}_{p_0}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{P}_{0i}={\mathrm{\Δ}}_{p_0}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{N_0\mathrm{W\Γ}}{g_{0i}}---\left(6\right)$

R _0irepresent the transmission rate of user i under macrocellular:

$R_{0i}=W{\log }_2(1+\mathrm{\Γ}),\∀i\∈\{\mathrm{1,2},\·\·\·,N\}---\left(7\right)$

Then the speed of system and increment are

${\mathrm{\ΔR}}_{\mathrm{OFF}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{R}_{0i}=\mathrm{NW}{\log }_2(1+\mathrm{\Γ})---\left(8\right)$

So for whole network, its energy efficiency growth trend is:

${\mathrm{\Δ\ϵ}}_{\mathrm{OFF}}=\frac{{\mathrm{\ΔP}}_{\mathrm{OFF}}}{{\mathrm{\ΔR}}_{\mathrm{OFF}}}=\frac{{\mathrm{\Δ}}_{p_0}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{N_0\mathrm{W\Γ}}{g_{0i}}}{\mathrm{NW}{\log }_2(1+\mathrm{\Γ})}---\left(9\right)$

(2) during little base station activation, user is accessed by little base station, and suppose that idle frequency spectrum resource just equals frequency spectrum threshold value, namely N number of user shares N _thindividual channel, obtains the power loss of now system according to (2), for:

△P _ON=P ₀+△ _pN _thP _max-P _sleep（10）

Wherein, P ₀represent little base station minimum emissive power in the on state, P _maxrepresent the transmitting power of little base station to user; P _sleepfor little base station corresponding power output in the dormant state.

The downlink transmission rate R of user i under cellulor pattern _ibe expressed as:

$R_i=\frac{N_{\mathrm{th}}}{N}W{\log }_2(1+\frac{P_{\max }{g}_i}{N_{0}W}),\∀i\∈\{\mathrm{1,2},\·\·\·,N\}---\left(11\right)$

G _irepresent the channel gain of little base station to user i.

The then speed of system and increment △ R during little base station activation _oNfor:

${\mathrm{\ΔR}}_{\mathrm{ON}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{R}_i=\frac{N_{\mathrm{th}}}{N}W\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\log }_2(1+\frac{P_{\max }{g}_i}{N_{0}W})---\left(12\right)$

So the energy efficiency growth trend △ ε of system during little base station activation _oNfor:

${\mathrm{\Δ\ϵ}}_{\mathrm{ON}}=\frac{{\mathrm{\ΔP}}_{\mathrm{ON}}}{{\mathrm{\ΔR}}_{\mathrm{ON}}}=\frac{P_0+{\mathrm{\Δ}}_p{N}_{\mathrm{th}}{P}_{\max }-P_{\mathrm{sleep}}}{\frac{N_{\mathrm{th}}}{N}W\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\log }_2(1+\frac{P_{\max }{g}_i}{N_{0}W})}---\left(13\right)$

As the idle frequency spectrum resource detected and frequency spectrum threshold value N _ththe energy efficiency growth trend △ ε of phase isochronous system _oNwith the energy efficiency △ ε of system during dormancy _oFFequal, that is:

△ε _ON=△ε _OFF（14）

(9) and (13) are substituted into (14) obtain:

$\frac{P_0+{\mathrm{\Δ}}_p{N}_{\mathrm{th}}{P}_{\max }-P_{\mathrm{sleep}}}{\frac{N_{\mathrm{th}}}{N}W\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\log }_2(1+\frac{P_{\max }{g}_i}{N_{0}W})}=\frac{{\mathrm{\Δ}}_{p_0}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{N_0\mathrm{W\Γ}}{g_{0i}}}{\mathrm{NW}{\log }_2(1+\mathrm{\Γ})}---\left(15\right)$

Frequency spectrum threshold value N can be obtained by solving (15) _th.

Fig. 2 is the system energy efficiency increment correlation curve figure under system energy efficiency increment under the control method of the little base station dormancy of the present embodiment controls and the standard-sized sheet method of prior art and simple and easy control methods control, system standard-sized sheet represents that all little base station radio-frequency emitting modules are under any circumstance all in opening, as long as simple and easy control refers to that little base station detects that user just makes emitting module open, otherwise just makes emitting module close.Can find out, under adopting the little base station dormancy control method of the present embodiment to control under the same conditions, the efficiency of system is most effective.

The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.

Claims (7)

1. a control method for little base station dormancy, is characterized in that, comprising:

1) load value in little base station range is detected;

2) according to step 1) load value that detects sets the frequency spectrum threshold value of little base station activation;

3) idle frequency spectrum resource is detected;

4) according to the load value detected, and the magnitude relationship of the frequency spectrum threshold value of described idle frequency spectrum resource and setting, make following judgement:

When 4-1) little base station is in resting state: the load value in little base station range is non-vanishing, and idle frequency spectrum resource is greater than the frequency spectrum threshold value of setting, then little base station radio-frequency transmitting-receiving subassembly is opened, and little base station activation enters state of activation; Otherwise little base station continues to keep resting state;

When 4-2) little base station is in state of activation: the load value in little base station range be zero or idle frequency spectrum resource be less than the frequency spectrum threshold value of setting, little base station radio-frequency transmitting-receiving subassembly is closed, and little base station enters resting state; Otherwise little base station continues to keep state of activation.

2. the control method of little base station dormancy as claimed in claim 1, is characterized in that, step 2) in utilize cognitive radio frequency spectrum cognition technology to detect idle frequency spectrum resource.

3. the control method of little base station dormancy as claimed in claim 2, is characterized in that, described cognitive radio frequency spectrum cognition technology is the cognitive radio frequency spectrum cognition technology based on energy measuring.

4. the control method of the little base station dormancy as described in claim arbitrary in claim 1-3, is characterized in that, the detection method of the load value in described little base station range is that user initiatively sends service request method or little base station cycle detection business method.

5. the control method of little base station dormancy as claimed in claim 4, described load value is the number of users in little base station range.

6. the control method of little base station dormancy as claimed in claim 5, is characterized in that, described frequency spectrum threshold value is channel number, and described idle frequency spectrum resource is idle channel number.

7. the control method of little base station dormancy as claimed in claim 6, is characterized in that, described idle channel number passes through solving equation $\frac{P_0+{\mathrm{\Δ}}_p{N}_{th}{P}_{\max }-P_{sleep}}{\frac{N_{th}}{N}W\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\log }_2\left(1+\frac{P_{\max }{g}_i}{N_{0}W}\right)}=\frac{{\mathrm{\Δ}}_{p_0}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{N_{0}W\mathrm{\Γ}}{g_{0i}}}{{\mathrm{NWlog}}_2\left(1+\mathrm{\Γ}\right)}$ Obtain, wherein: N _thfor idle channel number, N is the number of users in little base station range, P ₀represent little base station minimum emissive power in active state, P _maxrepresent that little base station is to the transmitting power of unique user in some frequency ranges, P _sleepfor little base station power output in the dormant state, Δ _ppower output needed for expression to the degree of dependence of load, Δ _p0for macro base station power output is to the degree of dependence of load, g _0irepresent the channel gain of macro base station to user i, g _ifor little base station is to the channel gain of user i, W is channel width, and Γ is the signal to noise ratio requirement of user, N ₀for background noise.