CN103945419A - Interference avoidance method and device used in cognitive radio system - Google Patents

Abstract

The invention discloses an interference avoidance method and device used in a cognitive radio system. The method includes the steps that the condition of interference of an authorization system in left edge carriers and/or right edge carriers of the multi-carrier cognitive radio system is determined through radio environment information; interference avoidance work modes of the left edge carriers and/or the right edge carriers are selected according to the condition of interference; scheduling policies, corresponding to the interference avoidance work modes, in the multi-carrier cognitive radio system are executed according to the interference avoidance work modes of the left edge carriers and/or the right edge carriers. According to the method and device, the condition of interference of the authorization system in the edge carriers of the multi-carrier cognitive radio system is acquired in advance, and then interference avoidance of the edge carriers is conducted, so that the interference of undesired out-of-band radiation of the authorization system in the edge carriers of the multi-carrier cognitive radio system is avoided, and the influence of undesired out of board radiation of the authorization system on the edge carriers of the multi-carrier radio system is effectively reduced.

Description

Interference bypassing method and equipment in a kind of cognitive radio system

Technical field

The present invention relates to communication technical field, especially related to interference bypassing method and equipment in a kind of cognitive radio system.

Background technology

Along with the fast development of mobile communication cause, the contradiction between growing broadband wireless communications demand and limited frequency spectrum resource becomes clear day by day, and operator faces severe frequency spectrum resource shortage problem; In addition, the frequency spectrum of some wireless communication systems uses on time and region almost idle, as for radio and television frequency range, along with the development of radio data system from analogue transmission to Digital Transmission, a lot of radio and television frequency ranges will be for a long time in idle condition, has wasted valuable Radio Resource.For solving frequency spectrum resource shortage problem, CR(Cognitive Radio, cognitive radio) technology is by extensive concern, cognitive radio technology obtains the spendable idle resource of frequency range of current location by frequency spectrum perception, and can the idle frequency range of opportunistic use, thereby improve frequency spectrum service efficiency, alleviate the situation of frequency spectrum resource anxiety.

Current frequency spectrum perception adopts omnidirectional antenna to carry out perception, can sensing external environment, and use artificial intelligence technology to learn, by some operating parameter of real-time change (as through-put power, carrier frequency and modulation technique etc.), make internal state adapt to the wireless signal statistical property received and change, to reach following object: (1) any time, the height reliable communication in any place; (2) the effective utilization to frequency spectrum resource.

For achieving the above object, as shown in Figure 1, cognitive radio has encircled whole cognitive process by cognition, and it comprises the steps: (1) frequency spectrum perception; (2) spectrum analysis; (3) frequency spectrum decision-making.Frequency spectrum perception is by input RF(Radio Frequency, radio frequency) analysis of pumping signal, complete the detection to idle frequency spectrum; Spectrum analysis is according to the result of frequency spectrum perception and the analysis to other wireless input signal, completes the estimation of channel condition information and the expectation of channel capacity; Frequency spectrum decision-making is the idle frequency spectrum resource that obtains according to frequency spectrum perception and the result of spectrum analysis, obtains the decision-making that last frequency spectrum uses, and this decision-making comprises the decision-making of frequency, bandwidth, transmitting power, modulation system etc.

In existing cognitive radio technology, can obtain idle frequency spectrum information by frequency spectrum perception, and can obtain usable spectrum resource by the method for accessing database.Wherein, in database, store the information such as the frequency spectrum resource of regional free time, cognitive radio system is by reporting the geographical location information of self, the spectrum information that can access queries region of living in can use, and the frequency that taken of the system of can obtaining the authorization, transmitter transmitting power, height and the positional information etc. of authoring system.

Transmitter filter has non-ideal characteristic, and (comprise out-of-band radiation and stray radiation with unexpected radiation, out-of-band radiation is the unexpected radiation in side channel that falls into by transmitter and non-linear generation, stray radiation is the harmonic radiation being produced by transmitter non-ideal characteristic, parasitic radiation, the unexpected radiation that transmitting intermodulation product and frequency conversion product etc. cause), can cause the radio system of transmitter adjacent frequency work to be around interfered.At multicarrier (as OFDM(Orthogonal Frequency Division Multiplexing, OFDM) etc.) in cognitive radio system, cognitive radio system selects authoring system not have occupied frequency to carry out work, in the time of the adjacent frequency of cognitive radio system in occupied authoring system working frequency points, the cognitive radio system that some are nearer apart from authoring system transmitter, the carrier wave at bandwidth of operation edge may be subject to the interference of the unexpected radiation of authoring system, as shown in Figure 2, two edges of multicarrier cognitive radio system left/right all may be subject to the interference of the outer unexpected radiation of band of left/right side frequency authoring system.

For the adjacent frequency that is not subject to authoring system is disturbed, as shown in Figure 3, general proportion isolation method in prior art, ensures that cognitive radio system and authoring system can be in the time that adjacent frequency be worked, and the unexpected radiation of authoring system can not disturbed cognitive radio system; In the time that cognitive radio system finds that the authoring system of native system and near by frequency existence does not meet frequency isolation requirement, adjust the working frequency points of cognitive radio system self, ensure that cognitive radio system and authoring system exist the frequency isolation meeting the demands.

Realizing in process of the present invention, inventor finds at least to exist in prior art following problem:

If cognitive radio system is distant apart from authoring system, because cognitive radio system may not can be subject to the interference of the unexpected radiation of authoring system, in the time that proportion isolation method ensures that cognitive radio system is not subject to the unexpected radiated interference of authoring system, can reduce the frequency spectrum service efficiency of whole frequency band.

Summary of the invention

The embodiment of the present invention provides interference bypassing method and the equipment in a kind of cognitive radio system, to improve the frequency spectrum service efficiency of whole frequency band.In order to achieve the above object:

The embodiment of the present invention provides the bypassing method of the interference in a kind of cognitive radio system, comprising:

Utilize radio environment information to determine the left hand edge carrier wave of authoring system to multicarrier cognitive radio system and/or the disturbed condition of right hand edge carrier wave;

Select the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to described disturbed condition;

Evading mode of operation according to the interference of described left hand edge carrier wave and/or right hand edge carrier wave carries out described in described multicarrier cognitive radio system to disturb and evades scheduling strategy corresponding to mode of operation.

The embodiment of the present invention provides the interference in a kind of cognitive radio system to evade equipment, comprising:

Determination module, for utilizing radio environment information to determine the left hand edge carrier wave of authoring system to multicarrier cognitive radio system and/or the disturbed condition of right hand edge carrier wave;

Select module, for selecting the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to described disturbed condition;

Scheduler module, disturbs and evades scheduling strategy corresponding to mode of operation for evading according to the interference of described left hand edge carrier wave and/or right hand edge carrier wave described in mode of operation execution multicarrier cognitive radio system.

Compared with prior art, the embodiment of the present invention at least has the following advantages:

In the embodiment of the present invention, by the disturbed condition of system to multicarrier cognitive radio system edge carrier wave of obtaining the authorization in advance, carrying out the interference of edge carrier wave evades, thereby evade the interference of the outer unexpected radiation of authoring system band to multicarrier cognitive radio system edge carrier wave, and effectively reduce the impact of the edge carrier wave of adjacent frequency band authoring system out-of-band radiation on multicarrier cognitive radio system.Further, when not needing proportion isolation method to ensure that cognitive radio system is not subject to the unexpected radiated interference of authoring system in the embodiment of the present invention, therefore can improve the frequency spectrum service efficiency of whole frequency band.

Brief description of the drawings

In order to be illustrated more clearly in technical scheme of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is that in prior art, cognitive radio has encircled whole cognitive process schematic diagram by cognition;

Fig. 2 is that in prior art, cognitive radio system is subject to the unexpected radiated interference schematic diagram of authoring system;

Fig. 3 is that available technology adopting frequency isolation mode avoids authoring system adjacent frequency to disturb schematic diagram;

Fig. 4 is the interference bypassing method schematic flow sheet in a kind of cognitive radio system of providing of the embodiment of the present invention one;

Fig. 5 is the schematic diagram of the disturbed condition assessment mode of proposition in the embodiment of the present invention one;

Fig. 6 is that the schematic diagram of evading mode of operation is disturbed in the selection proposing in the embodiment of the present invention one;

Fig. 7 is the application scenarios schematic diagram proposing in the embodiment of the present invention two, three;

Fig. 8 is the application scenarios schematic diagram proposing in the embodiment of the present invention four;

Fig. 9 is the application scenarios schematic diagram proposing in the embodiment of the present invention five;

Figure 10 is that device structure schematic diagram is evaded in the interference in a kind of cognitive radio system of providing of the embodiment of the present invention six.

Embodiment

Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

Embodiment mono-

The embodiment of the present invention one provides the interference bypassing method in a kind of cognitive radio system (being multicarrier cognitive radio system), and as shown in Figure 4, the method comprises the following steps:

Step 401, the radio environment information of acquisition multicarrier cognitive radio system present position.

In the embodiment of the present invention, this radio environment information includes but not limited to one of following or combination in any: the range information of transmitting power, authoring system and the multicarrier cognitive radio system of the idle frequency resource that can be used by multicarrier cognitive radio system, the measurement power that authoring system takies frequency, frequency that the authorized system in corresponding region, multicarrier cognitive radio system present position takies, authoring system etc.

In the embodiment of the present invention, the radio environment information that obtains multicarrier cognitive radio system present position includes but not limited to one of following mode or combination in any:

Mode one, obtain the radio environment information of multicarrier cognitive radio system present position by frequency spectrum perception mode; In which one, carry out frequency spectrum perception processing for each frequency, and measure authoring system and take the measurement power of frequency; Wherein, if there is K authoring system, the measurement power that authoring system takies frequency can be respectively P _i, i=1 ..., K.

Mode two, obtain the radio environment information of multicarrier cognitive radio system present position by Query Database mode; In which two, obtain the frequency spectrum service condition of each frequency by Query Database, the range information of transmitting power, authoring system and the multicarrier cognitive radio system of authoring system.

Step 402, utilizes radio environment information to determine the left hand edge carrier wave of authoring system to multicarrier cognitive radio system and/or the disturbed condition of right hand edge carrier wave.

In the cognitive radio system that comprises multiple carrier waves, using operating frequency lower than the carrier wave of default first frequency as left hand edge carrier wave; Or, in the cognitive radio system of employing OFDM modulation system that only comprises a carrier wave, using operating frequency lower than the subcarrier of default second frequency as left hand edge carrier wave.

In the cognitive radio system that comprises multiple carrier waves, using operating frequency higher than the carrier wave of default the 3rd frequency as right hand edge carrier wave; Or, in the cognitive radio system of employing OFDM modulation system that only comprises a carrier wave, using operating frequency higher than the subcarrier of default the 4th frequency as right hand edge carrier wave.

In the embodiment of the present invention, disturbed condition assessment mode schematic diagram as shown in Figure 5, utilize radio environment information to determine the left hand edge carrier wave of authoring system to multicarrier cognitive radio system and/or the disturbed condition of right hand edge carrier wave, specifically include but not limited to following mode:

Mode one, in the time that radio environment information comprises that authoring system takies the measurement power of frequency, utilize following formula to determine left hand edge carrier wave or disturbed condition corresponding to right hand edge carrier wave:

$I_L=\underset{i=1}{\overset{K_L}{\mathrm{\Σ}}}{P}_{L,i}\×{\mathrm{\Δ}}_{L,i};$

Wherein, I _lrepresent left hand edge carrier wave or the disturbed condition factor corresponding to right hand edge carrier wave, and the disturbed condition factor is used for characterizing disturbed condition, P _l,irepresent to take than i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points the measurement power of frequency, K _lrepresent that authoring system takies the total quantity of frequency, Δ _l,irepresent the corresponding capability correction factor of frequency interval with this multicarrier cognitive radio system bandwidth of operation left hand edge or right hand edge than i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points, and this capability correction factor takies frequency apart from decisions jointly such as the frequencies of multicarrier cognitive radio system working band left hand edge or right hand edge according to authoring system out-of-band radiation masterplate, authoring system.

Mode two, in the time that radio environment information comprises the range information of transmitting power, authoring system and multicarrier cognitive radio system of authoring system, utilize following formula to determine left hand edge carrier wave or disturbed condition corresponding to right hand edge carrier wave:

$I_L=\underset{i=1}{\overset{K_L}{\mathrm{\Σ}}}{P}_{L,i}^t\×{\mathrm{\Δ}}_{L,i}\×L_{L,i};$

Wherein, I _lrepresent left hand edge carrier wave or the disturbed condition factor corresponding to right hand edge carrier wave, and the disturbed condition factor is used for characterizing disturbed condition, represent than the transmitting power of i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points, Δ _l,irepresent than the corresponding capability correction factor of frequency interval of i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points and this multicarrier cognitive radio system bandwidth of operation left hand edge or right hand edge, and this capability correction factor takies frequency apart from common decisions the such as the frequency of multicarrier cognitive radio system working band left hand edge or right hand edge, L according to authoring system out-of-band radiation masterplate, authoring system _l,irepresent than i the path loss factor that authoring system is corresponding with the distance of multicarrier cognitive radio system in the low frequency range of multicarrier cognitive radio system working frequency points.

Step 403, selects the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to disturbed condition (characterizing disturbed condition by the disturbed condition factor).

In the embodiment of the present invention, select the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to disturbed condition, specifically include but not limited to following mode:

Mode one, characterizing when disturbed condition by the disturbed condition factor, select the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to disturbed condition, comprise the steps:

Step 1, the interference of whether opening left hand edge carrier wave and/or right hand edge carrier wave according to disturbed condition factor judgement are evaded; Evade if open the interference of left hand edge carrier wave and/or right hand edge carrier wave, perform step 2; Evade if do not open the interference of left hand edge carrier wave and/or right hand edge carrier wave, work by existing mode.

In the embodiment of the present invention, the interference of whether opening left hand edge carrier wave and/or right hand edge carrier wave according to disturbed condition factor judgement is evaded and being comprised: in the time that the disturbed condition factor corresponding to left hand edge carrier wave is greater than default the first thresholding, opens the interference of left hand edge carrier wave and evade; Otherwise the interference of not opening left hand edge carrier wave is evaded; And/or, in the time that the disturbed condition factor corresponding to right hand edge carrier wave is greater than default the second thresholding, opens the interference of right hand edge carrier wave and evade; Otherwise, do not open the interference of right hand edge carrier wave and evade.

Step 2, the left hand edge carrier wave of measuring multicarrier cognitive radio system and/or the interference level of right hand edge carrier wave; Wherein, measuring the left hand edge carrier wave of multicarrier cognitive radio system and/or the interference level of right hand edge carrier wave specifically includes but not limited to: the left hand edge carrier wave in multicarrier cognitive radio system and/or right hand edge carrier wave are mourned in silence in subframe, and in this subframe, measure the interference level (being the signal power on left hand edge carrier wave and/or right hand edge carrier wave) on left hand edge carrier wave and/or right hand edge carrier wave.

Step 3, select the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to the interference level (being the signal power on left hand edge carrier wave and/or right hand edge carrier wave) of measuring.

In the embodiment of the present invention, as shown in Figure 6, select the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to the interference level (interference level measured value is signal power) of measuring and comprise:

In the time that the interference level measured value on left hand edge carrier wave is less than default the 3rd thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection left hand edge carrier wave; When the interference level measured value on left hand edge carrier wave is not less than default the 3rd thresholding, and be less than while presetting the 4th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection left hand edge carrier wave; In the time that the interference level measured value on left hand edge carrier wave is not less than default the 4th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection left hand edge carrier wave; And/or,

In the time that the interference level measured value on right hand edge carrier wave is less than default the 5th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection right hand edge carrier wave; When the interference level measured value on right hand edge carrier wave is not less than default the 5th thresholding, and be less than while presetting the 6th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection right hand edge carrier wave; In the time that the interference level measured value on right hand edge carrier wave is not less than default the 6th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection right hand edge carrier wave.

Mode two, characterizing when disturbed condition by the disturbed condition factor, select the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to disturbed condition, specifically comprise:

In the time that the disturbed condition factor corresponding to left hand edge carrier wave is less than default the 7th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection left hand edge carrier wave; When the disturbed condition factor corresponding to left hand edge carrier wave is not less than default the 7th thresholding, and be less than while presetting the 8th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection left hand edge carrier wave; In the time that the disturbed condition factor corresponding to left hand edge carrier wave is not less than default the 8th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection left hand edge carrier wave; And/or,

In the time that the disturbed condition factor corresponding to right hand edge carrier wave is less than default the 9th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection right hand edge carrier wave; When the disturbed condition factor corresponding to right hand edge carrier wave is not less than default the 9th thresholding, and be less than while presetting the tenth thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection right hand edge carrier wave; In the time that the disturbed condition factor corresponding to right hand edge carrier wave is not less than default the tenth thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection right hand edge carrier wave.

Step 404, evades this interference in mode of operation execution multicarrier cognitive radio system according to the interference of left hand edge carrier wave and/or right hand edge carrier wave and evades scheduling strategy corresponding to mode of operation.

In the embodiment of the present invention, evade in mode of operation execution multicarrier cognitive radio system and disturb and evade scheduling strategy corresponding to mode of operation according to the interference of left hand edge carrier wave and/or right hand edge carrier wave, specifically comprise:

Situation one, evade mode of operation while being normal mode of operation when the interference of left hand edge carrier wave and/or right hand edge carrier wave, dispatched users on the left side edge carrier wave and/or right hand edge carrier wave, on according to existing execution mode left hand edge carrier wave and/or right hand edge carrier wave.

Situation two, evade mode of operation while being " shut " mode" when the interference of left hand edge carrier wave and/or right hand edge carrier wave, dispatched users not on the left side edge carrier wave and/or right hand edge carrier wave.

Situation three, evade mode of operation while being limited operation pattern when the interference of left hand edge carrier wave and/or right hand edge carrier wave, include but not limited to carry out one of following mode or combination in any:

One, the carrier wave at the non-edge of priority allocation in the time of scheduling; Concrete, the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, is preferably the resource on the non-left hand edge carrier wave of user assignment when scheduling; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, is preferably the resource on the non-right hand edge carrier wave of user assignment when scheduling.

Two, in when scheduling QoS(Quality of Service, service quality) user that grade is high is not dispatched on the carrier wave at non-edge; Concrete, the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, and the user that when scheduling, service quality QoS grade is high is not dispatched to the resource on left hand edge carrier wave; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, the user that when scheduling, service quality QoS grade is high is not dispatched to the resource on right hand edge carrier wave.

Three, user or the good user of channel quality at left hand edge carrier wave and/or center, right hand edge carrier wave on dispatching cell in the time of scheduling; Concrete, the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, the user at center, left hand edge carrier wave on dispatching cell or the good user of channel quality when scheduling; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern, the user at center, right hand edge carrier wave on dispatching cell or the good user of channel quality when scheduling on the right.

Four, the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, while being dispatched to the user's initial transmission on left hand edge carrier wave, adopt lower MCS(Modulation and Coding Scheme, modulation coding mode) grade, as: adopt low-order-modulated technology and lower encoder bit rate (as 1/4 code check); And/or, the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, while being dispatched to the user's initial transmission on right hand edge carrier wave, adopt lower MCS grade, as: low-order-modulated technology and lower encoder bit rate (as 1/4 code check) adopted.

In sum, in the embodiment of the present invention, by the disturbed condition of system to multicarrier cognitive radio system edge carrier wave of obtaining the authorization in advance, carrying out the interference of edge carrier wave evades, thereby evade the interference of the outer unexpected radiation of authoring system band to multicarrier cognitive radio system edge carrier wave, and effectively reduce the impact of the edge carrier wave of adjacent frequency band authoring system out-of-band radiation on multicarrier cognitive radio system.Further, when not needing proportion isolation method to ensure that cognitive radio system is not subject to the unexpected radiated interference of authoring system in the embodiment of the present invention, therefore can improve the frequency spectrum service efficiency of whole frequency band.

Below in conjunction with concrete application scenarios, the embodiment of the present invention is further detailed.

Embodiment bis-

The TD-LTE system (follow-up abbreviation TD-LTE-CR system) of supposing to possess CR function works in TV frequency range by cognitive radio mode, application scenarios schematic diagram as shown in Figure 7, this TD-LTE-CR system comprises a carrier wave, and adopt OFDM modulation system, this TD-LTE-CR system comprises N OFDM subcarrier (adopting the subcarrier of OFDM mode), i.e. L PRB(Physical Resource Block, Physical Resource Block, definition according to TD-LTE agreement to PRB, L=N/12).

Certain community of TD-LTE-CR system, after starting, configures the relevant parameter that this area interference is evaded, and relevant parameter comprises the capability correction factor Δ that different frequency interval is corresponding _i, the PRB number M of left hand edge carrier wave and right hand edge carrier wave, disturbs and evades technology execution cycle T, disturbs the decision threshold while evading mode of operation startup, decision threshold when mode of operation selection is evaded in interference etc.

The base station equipment of TD-LTE-CR system obtains available idle TV frequency by frequency spectrum perception, and then the cell operation of TD-LTE-CR system is in this free time TV frequency; Or, the base station equipment of TD-LTE-CR system is passed through accessing database, and the information such as geographical position based on base station equipment, transmitting power, height obtains the idle TV frequency that this base station equipment can be used from database, then the cell operation of TD-LTE-CR system is in this free time TV frequency.

The base station equipment of TD-LTE-CR system is evaded in technology execution cycle T execution above-described embodiment one and is disturbed and evade process according to interference, within each execution cycle:

For above-mentioned steps 401, certain time within technology execution cycle T is evaded in interference is obtained radio environment information, concrete method can adopt one of following two kinds of methods: (1) is if TD-LTE-CR system possesses frequency spectrum perception ability, each TV frequency is carried out to frequency spectrum perception, according to frequency spectrum perception result, find the frequency that taken by TV system, then measure the power of the reception signal of these occupied frequencies, and the power that records the reception signal of each occupied frequency is P _i, i=1 ..., K, wherein K is occupied frequency number, the value of K is determined according to frequency spectrum perception result; (2) if TD-LTE-CR system possesses the ability of accessing database, report the information such as geographical position, transmitting power of the base station equipment of TD-LTE-CR system to database, and obtain the frequency that this base station equipment region of living in is taken by TV system by Query Database, and the information such as position, height of the transmitting power of each TV system, TV launching tower.

For above-mentioned steps 402, after obtaining radio environment information, the left hand edge carrier wave of assessment TD-LTE-CR system cell working band and/or M the situation that PRB is disturbed by TV of right hand edge carrier wave, concrete grammar can adopt mode one or the mode two in step 402 to calculate the corresponding disturbed condition factor.

For above-mentioned steps 403, first judge whether that according to the disturbed condition factor interference of M the PRB that opens left hand edge carrier wave and/or right hand edge carrier wave evades; Wherein, in the time that the disturbed condition factor corresponding to left hand edge carrier wave is greater than default the first thresholding, opens the interference of M PRB of left hand edge carrier wave and evade; Otherwise, do not open the interference of left hand edge carrier wave and evade, work according to existing mode; And/or, in the time that the disturbed condition factor corresponding to right hand edge carrier wave is greater than default the second thresholding, opens the interference of M PRB of right hand edge carrier wave and evade; Otherwise, do not open the interference of right hand edge carrier wave and evade, work according to existing mode.

Afterwards, in the time that the interference of M PRB of unlatching left hand edge carrier wave is evaded, at certain subframe M PRB of left hand edge carrier wave that mourn in silence, and in this subframe, measure the interfering signal power on left hand edge carrier wave PRB, this interfering signal power measured value is as left hand edge carrier wave PRB interference measurement results; And/or, in the time that the interference of M PRB of unlatching right hand edge carrier wave is evaded, at certain subframe M PRB of right hand edge carrier wave that mourn in silence, and in this subframe, measure the interfering signal power on right hand edge carrier wave PRB, this interfering signal power measured value is as right hand edge carrier wave PRB interference measurement results.

Afterwards, select the interference of left hand edge carrier wave/right hand edge carrier wave to evade mode of operation according to interference measurement results (signal power of left hand edge carrier wave/right hand edge carrier wave); In the time that the interference measurement results on left hand edge carrier wave is less than default the 3rd thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection left hand edge carrier wave; When the interference measurement results on left hand edge carrier wave is not less than default the 3rd thresholding, and be less than while presetting the 4th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection left hand edge carrier wave; In the time that the interference measurement results on left hand edge carrier wave is not less than default the 4th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection left hand edge carrier wave; And/or in the time that the interference measurement results on right hand edge carrier wave is less than default the 5th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection right hand edge carrier wave; When the interference measurement results on right hand edge carrier wave is not less than default the 5th thresholding, and be less than while presetting the 6th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection right hand edge carrier wave; In the time that the interference measurement results on right hand edge carrier wave is not less than default the 6th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection right hand edge carrier wave.

For above-mentioned steps 404, evade this interference in mode of operation execution multicarrier cognitive radio system according to the interference of left hand edge carrier wave and/or right hand edge carrier wave and evade scheduling strategy corresponding to mode of operation.

Concrete, the base station equipment of this TD-LTE-CR system can adopt following one or use several scheduling strategies simultaneously:

(1) in the time of scheduling, the M at the non-edge of a priority allocation PRB during for user resource allocation, that is: the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, when scheduling preferentially by user assignment to M PRB of non-left hand edge carrier wave, in the time that PRB resource is inadequate, just by user assignment to M PRB of left hand edge carrier wave; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, preferentially that user assignment is upper to M PRB of non-right hand edge carrier wave when scheduling, in the time that PRB resource is inadequate, just by user assignment to M PRB of right hand edge carrier wave.

(2) be not dispatched to M the PRB at non-edge the high user of when scheduling QoS grade, that is: the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, and the user that when scheduling, QoS grade is high is not dispatched on M PRB of left hand edge carrier wave; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, the user that QoS grade is high is not dispatched on M PRB of right hand edge carrier wave.

It should be noted that, above-mentioned scheduling strategy can be combined use with the scheduling strategy of (1), taking left hand edge carrier wave as limited operation pattern is as example, the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, when scheduling, preferentially user assignment is arrived to M PRB of non-left hand edge carrier wave, in the time that PRB resource is inadequate, use M PRB of left hand edge carrier wave, but user assignment low qos requirement is upper to M PRB of left hand edge carrier wave, and the high user of qos requirement is not assigned on M PRB of left hand edge carrier wave.

(3) user or the good user of channel quality that while scheduling, on left hand edge carrier wave and/or right hand edge carrier wave, only dispatch each center of housing estate of the base station equipment of TD-LTE-CR system, that is: the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, position or the channel quality of each user in community estimated according to quality of uplink signal in base station equipment Ge community, when scheduling, on M PRB of left hand edge carrier wave, only dispatch user or the good user of channel quality of the each center of housing estate of base station equipment; And/or, the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, position or the channel quality of each user in community estimated according to quality of uplink signal in base station equipment Ge community, when scheduling, on M PRB of right hand edge carrier wave, only dispatch user or the good user of channel quality of the each center of housing estate of base station equipment.

It should be noted that, above-mentioned scheduling strategy can be combined use with the scheduling strategy of (1), taking left hand edge carrier wave as limited operation pattern is as example, the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, when scheduling preferentially by user assignment to M PRB of non-left hand edge carrier wave, in the time that PRB resource is inadequate, use M PRB of left hand edge carrier wave, but the user or the good user of channel quality that on M PRB of left hand edge carrier wave, only dispatch each center of housing estate of this base station equipment.

(4) be dispatched to user on a left/right edge carrier wave M PRB in the time of initial transmission, adopt lower MCS grade, such as: the modes such as low-order-modulated technology (as: BPSK, QPSK) and lower encoder bit rate (as: 1/4 code check) adopted.

Embodiment tri-

The TD-LTE system (follow-up abbreviation TD-LTE-CR system) of supposing to possess CR function works in TV frequency range by cognitive radio mode, application scenarios schematic diagram as shown in Figure 7, this TD-LTE-CR system comprises a carrier wave, and adopt OFDM modulation system, this TD-LTE-CR system comprises N OFDM subcarrier (adopting the subcarrier of OFDM mode), i.e. L PRB(Physical Resource Block, Physical Resource Block, definition according to TD-LTE agreement to PRB, L=N/12).

Certain community of TD-LTE-CR system, after starting, configures the relevant parameter that this area interference is evaded, and relevant parameter comprises the capability correction factor Δ that different frequency interval is corresponding _i, the PRB number M of left hand edge carrier wave and right hand edge carrier wave, disturbs and evades technology execution cycle T, disturbs the decision threshold while evading mode of operation startup, decision threshold when mode of operation selection is evaded in interference etc.

The base station equipment of TD-LTE-CR system obtains available idle TV frequency by frequency spectrum perception, and then the cell operation of TD-LTE-CR system is in this free time TV frequency; Or, the base station equipment of TD-LTE-CR system is passed through accessing database, and the information such as geographical position based on base station equipment, transmitting power, height obtains the idle TV frequency that this base station equipment can be used from database, then the cell operation of TD-LTE-CR system is in this free time TV frequency.

The base station equipment of TD-LTE-CR system is evaded in technology execution cycle T execution above-described embodiment one and is disturbed and evade process according to interference, within each execution cycle:

For above-mentioned steps 401, certain time within technology execution cycle T is evaded in interference is obtained radio environment information, concrete method can adopt one of following two kinds of methods: (1) is if TD-LTE-CR system possesses frequency spectrum perception ability, each TV frequency is carried out to frequency spectrum perception, according to frequency spectrum perception result, find the frequency that taken by TV system, then measure the power of the reception signal of these occupied frequencies, and the power that records the reception signal of each occupied frequency is P _i, i=1 ..., K, wherein K is occupied frequency number, the value of K is determined according to frequency spectrum perception result; (2) if TD-LTE-CR system possesses the ability of accessing database, report the information such as geographical position, transmitting power of the base station equipment of TD-LTE-CR system to database, and obtain the frequency that this base station equipment region of living in is taken by TV system by Query Database, and the information such as position, height of the transmitting power of each TV system, TV launching tower.

For above-mentioned steps 402, after obtaining radio environment information, the left hand edge carrier wave of assessment TD-LTE-CR system cell working band and/or M the situation that PRB is disturbed by TV of right hand edge carrier wave, concrete grammar can adopt mode one or the mode two in step 402 to calculate the corresponding disturbed condition factor.

For above-mentioned steps 403, select the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to the disturbed condition factor; Wherein, in the time that the disturbed condition factor corresponding to left hand edge carrier wave is less than default the 7th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection left hand edge carrier wave; When the disturbed condition factor corresponding to left hand edge carrier wave is not less than default the 7th thresholding, and be less than while presetting the 8th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection left hand edge carrier wave; In the time that the disturbed condition factor corresponding to left hand edge carrier wave is not less than default the 8th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection left hand edge carrier wave; And/or in the time that the disturbed condition factor corresponding to right hand edge carrier wave is less than default the 9th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection right hand edge carrier wave; When the disturbed condition factor corresponding to right hand edge carrier wave is not less than default the 9th thresholding, and be less than while presetting the tenth thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection right hand edge carrier wave; In the time that the disturbed condition factor corresponding to right hand edge carrier wave is not less than default the tenth thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection right hand edge carrier wave.

For above-mentioned steps 404, evade this interference in mode of operation execution multicarrier cognitive radio system according to the interference of left hand edge carrier wave and/or right hand edge carrier wave and evade scheduling strategy corresponding to mode of operation.

Concrete, the base station equipment of this TD-LTE-CR system can adopt following one or use several scheduling strategies simultaneously:

(1) in the time of scheduling, the M at the non-edge of a priority allocation PRB during for user resource allocation, that is: the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, when scheduling preferentially by user assignment to M PRB of non-left hand edge carrier wave, in the time that PRB resource is inadequate, just by user assignment to M PRB of left hand edge carrier wave; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, preferentially that user assignment is upper to M PRB of non-right hand edge carrier wave when scheduling, in the time that PRB resource is inadequate, just by user assignment to M PRB of right hand edge carrier wave.

(2) be not dispatched to M the PRB at non-edge the high user of when scheduling QoS grade, that is: the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, and the user that when scheduling, QoS grade is high is not dispatched on M PRB of left hand edge carrier wave; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, the user that QoS grade is high is not dispatched on M PRB of right hand edge carrier wave.

It should be noted that, above-mentioned scheduling strategy can be combined use with the scheduling strategy of (1), taking left hand edge carrier wave as limited operation pattern is as example, the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, when scheduling, preferentially user assignment is arrived to M PRB of non-left hand edge carrier wave, in the time that PRB resource is inadequate, use M PRB of left hand edge carrier wave, but user assignment low qos requirement is upper to M PRB of left hand edge carrier wave, and the high user of qos requirement is not assigned on M PRB of left hand edge carrier wave.

(3) user or the good user of channel quality that while scheduling, on left hand edge carrier wave and/or right hand edge carrier wave, only dispatch each center of housing estate of the base station equipment of TD-LTE-CR system, that is: the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, position or the channel quality of each user in community estimated according to quality of uplink signal in base station equipment Ge community, when scheduling, on M PRB of left hand edge carrier wave, only dispatch user or the good user of channel quality of the each center of housing estate of base station equipment; And/or, the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, position or the channel quality of each user in community estimated according to quality of uplink signal in base station equipment Ge community, when scheduling, on M PRB of right hand edge carrier wave, only dispatch user or the good user of channel quality of the each center of housing estate of base station equipment.

It should be noted that, above-mentioned scheduling strategy can be combined use with the scheduling strategy of (1), taking left hand edge carrier wave as limited operation pattern is as example, the interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, when scheduling preferentially by user assignment to M PRB of non-left hand edge carrier wave, in the time that PRB resource is inadequate, use M PRB of left hand edge carrier wave, but the user or the good user of channel quality that on M PRB of left hand edge carrier wave, only dispatch each center of housing estate of this base station equipment.

(4) be dispatched to user on a left/right edge carrier wave M PRB in the time of initial transmission, adopt lower MCS grade, such as: the modes such as low-order-modulated technology (as: BPSK, QPSK) and lower encoder bit rate (as: 1/4 code check) adopted.

Embodiment tetra-

The TD-LTE system (follow-up abbreviation TD-LTE-CR system) of supposing to possess CR function works in TV frequency range by cognitive radio mode, application scenarios schematic diagram as shown in Figure 8, and the community of this TD-LTE-CR system has N continuous carrier wave.Certain community of TD-LTE-CR system, after starting, configures the relevant parameter that this area interference is evaded, and relevant parameter comprises the capability correction factor Δ that different frequency interval is corresponding _i, left hand edge carrier wave and right hand edge carrier wave number M, disturb and evade technology execution cycle T, disturbs the decision threshold while evading mode of operation startup, decision threshold when mode of operation selection is evaded in interference etc.Under the application scenarios shown in Fig. 8, there are 5 continuous carriers the community of TD-LTE-CR system, when initial parameter configuration, thinks that carrier wave-1 and carrier wave-5 are respectively left hand edge carrier wave and right hand edge carrier wave, and M=1.

Based on above-mentioned application scenarios, can adopt the handling process of above-mentioned steps 401-step 404, the received signal power measurement value of the frequency location based on lower than carrier wave-1 operating frequency, can finally carry out corresponding scheduling strategy for carrier wave-1; And/or the received signal power measurement value of the frequency location based on lower than carrier wave-5 operating frequency, can finally carry out corresponding scheduling strategy for carrier wave-5.

Embodiment five

The TD-LTE system (follow-up abbreviation TD-LTE-CR system) of supposing to possess CR function works in TV frequency range by cognitive radio mode, application scenarios schematic diagram as shown in Figure 9, and the community of this TD-LTE-CR system has N discrete carrier wave.Certain community of TD-LTE-CR system, after starting, configures the relevant parameter that this area interference is evaded, and relevant parameter comprises the capability correction factor Δ that different frequency interval is corresponding _i, left hand edge carrier wave and right hand edge carrier wave number M, disturb and evade technology execution cycle T, disturbs the decision threshold while evading mode of operation startup, decision threshold when mode of operation selection is evaded in interference etc.

Under the application scenarios shown in Fig. 9, there are 5 discontinuous carriers the community of TD-LTE-CR system, in initial parameter when configuration, is thought carrier wave-1, carrier wave-3, carrier wave 4, carrier wave-5 are edge carrier wave, if 5 carrier waves that carrier wave is different bandwidth, can be according to the number of each carrier bandwidths size configure edge carrier wave when configuration, such as: carrier wave-1, carrier wave-2 bandwidth is narrow, and configuring carrier wave-1 and carrier wave-2 is all edge carrier wave, determines that mode of operation is evaded in the interference of carrier wave-1 and carrier wave-2 according to the interference assessment factor simultaneously.

Based on above-mentioned application scenarios, can adopt the handling process of above-mentioned steps 401-step 404, the disturbed condition factor based on carrier wave-1, can finally carry out corresponding scheduling strategy for carrier wave-1; The disturbed condition factor based on carrier wave-3, can finally carry out corresponding scheduling strategy for carrier wave-3; The disturbed condition factor based on carrier wave-4, can finally carry out corresponding scheduling strategy for carrier wave-4; The disturbed condition factor based on carrier wave-5, can finally carry out corresponding scheduling strategy for carrier wave-5.

Embodiment six

Based on the inventive concept same with said method, in the embodiment of the present invention, also provide the interference in a kind of cognitive radio system to evade equipment, as shown in figure 10, this equipment comprises:

Determination module 11, for utilizing radio environment information to determine the left hand edge carrier wave of authoring system to multicarrier cognitive radio system and/or the disturbed condition of right hand edge carrier wave;

Select module 12, for selecting the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to described disturbed condition;

Scheduler module 13, disturbs and evades scheduling strategy corresponding to mode of operation for evading according to the interference of described left hand edge carrier wave and/or right hand edge carrier wave described in mode of operation execution multicarrier cognitive radio system.

In the embodiment of the present invention, described selection module 12 specifically comprises:

Judge submodule 121, evade for the interference of whether opening left hand edge carrier wave and/or right hand edge carrier wave according to described disturbed condition judgement;

Measure submodule 122, for when judged result being the interference of unlatching left hand edge carrier wave and/or right hand edge carrier wave while evading, measure the left hand edge carrier wave of described multicarrier cognitive radio system and/or the interference level of right hand edge carrier wave;

The first chooser module 123, for selecting the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to the interference level of measuring.

In the embodiment of the present invention, described equipment also comprises: acquisition module 14, for obtain the radio environment information of multicarrier cognitive radio system present position by frequency spectrum perception mode; And/or, obtain the radio environment information of multicarrier cognitive radio system present position by Query Database mode.

In the embodiment of the present invention, described radio environment information comprises one of following or combination in any: the range information of transmitting power, authoring system and the multicarrier cognitive radio system of the idle frequency resource that can be used by multicarrier cognitive radio system, the measurement power that authoring system takies frequency, frequency that the authorized system in corresponding region, multicarrier cognitive radio system present position takies, authoring system.

Described determination module 11, also for comprising the cognitive radio system of multiple carrier waves, using operating frequency lower than the carrier wave of default first frequency as left hand edge carrier wave; Or, in the cognitive radio system of employing OFDM modulation system that only comprises a carrier wave, using operating frequency lower than the subcarrier of default second frequency as left hand edge carrier wave;

In the cognitive radio system that comprises multiple carrier waves, using operating frequency higher than the carrier wave of default the 3rd frequency as right hand edge carrier wave; Or, in the cognitive radio system of employing OFDM modulation system that only comprises a carrier wave, using operating frequency higher than the subcarrier of default the 4th frequency as right hand edge carrier wave.

Described determination module 11, when comprising that in radio environment information authoring system takies the measurement power of frequency, utilizes following formula to determine left hand edge carrier wave or disturbed condition corresponding to right hand edge carrier wave:

$I_L=\underset{i=1}{\overset{K_L}{\mathrm{\Σ}}}{P}_{L,i}\×{\mathrm{\Δ}}_{L,i};$

Wherein, I _lrepresent left hand edge carrier wave or the disturbed condition factor corresponding to right hand edge carrier wave, and the described disturbed condition factor is used for characterizing disturbed condition, P _l,irepresent to take than i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points the measurement power of frequency, K _lrepresent that authoring system takies the total quantity of frequency, Δ _l,irepresent than the corresponding capability correction factor of frequency interval of i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points and this multicarrier cognitive radio system bandwidth of operation left hand edge or right hand edge;

Or,

In the time that radio environment information comprises the range information of transmitting power, authoring system and multicarrier cognitive radio system of authoring system, utilize following formula to determine left hand edge carrier wave or disturbed condition corresponding to right hand edge carrier wave:

$I_L=\underset{i=1}{\overset{K_L}{\mathrm{\Σ}}}{P}_{L,i}^t\×{\mathrm{\Δ}}_{L,i}\×L_{L,i};$

Wherein, I _lrepresent left hand edge carrier wave or the disturbed condition factor corresponding to right hand edge carrier wave, and the described disturbed condition factor is used for characterizing disturbed condition, represent than the transmitting power of i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points, Δ _l,irepresent than the corresponding capability correction factor of frequency interval of i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points and this multicarrier cognitive radio system bandwidth of operation left hand edge or right hand edge, L _l,irepresent than i the path loss factor that authoring system is corresponding with the distance of multicarrier cognitive radio system in the low frequency range of multicarrier cognitive radio system working frequency points.

In the embodiment of the present invention, described judgement submodule 121, specifically in the time characterizing disturbed condition by the disturbed condition factor, in the time that the disturbed condition factor corresponding to left hand edge carrier wave is greater than default the first thresholding, opens the interference of left hand edge carrier wave and evades; Otherwise, do not open the interference of left hand edge carrier wave and evade; And/or,

In the time that the disturbed condition factor corresponding to right hand edge carrier wave is greater than default the second thresholding, opens the interference of right hand edge carrier wave and evade; Otherwise, do not open the interference of right hand edge carrier wave and evade.

In the embodiment of the present invention, described measurement submodule 122, specifically for the left hand edge carrier wave in described multicarrier cognitive radio system and/or right hand edge carrier wave are mourned in silence in subframe, and in this subframe, measure the interference level on left hand edge carrier wave and/or right hand edge carrier wave.

In the embodiment of the present invention, described the first chooser module 123, while presetting the 3rd thresholding specifically for being less than when the interference level measured value on left hand edge carrier wave, it is normal mode of operation that mode of operation is evaded in the interference of selection left hand edge carrier wave; When the interference level measured value on left hand edge carrier wave is not less than default the 3rd thresholding, and be less than while presetting the 4th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection left hand edge carrier wave; In the time that the interference level measured value on left hand edge carrier wave is not less than default the 4th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection left hand edge carrier wave; And/or,

In the time that the interference level measured value on right hand edge carrier wave is less than default the 5th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection right hand edge carrier wave; When the interference level measured value on right hand edge carrier wave is not less than default the 5th thresholding, and be less than while presetting the 6th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection right hand edge carrier wave; In the time that the interference level measured value on right hand edge carrier wave is not less than default the 6th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection right hand edge carrier wave.

In the embodiment of the present invention, described selection module 12 also comprises: the second chooser module 124, for in the time characterizing disturbed condition by the disturbed condition factor, in the time that the disturbed condition factor corresponding to left hand edge carrier wave is less than default the 7th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection left hand edge carrier wave; When the disturbed condition factor corresponding to left hand edge carrier wave is not less than default the 7th thresholding, and be less than while presetting the 8th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection left hand edge carrier wave; In the time that the disturbed condition factor corresponding to left hand edge carrier wave is not less than default the 8th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection left hand edge carrier wave; And/or,

In the time that the disturbed condition factor corresponding to right hand edge carrier wave is less than default the 9th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection right hand edge carrier wave; When the disturbed condition factor corresponding to right hand edge carrier wave is not less than default the 9th thresholding, and be less than while presetting the tenth thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection right hand edge carrier wave; In the time that the disturbed condition factor corresponding to right hand edge carrier wave is not less than default the tenth thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection right hand edge carrier wave.

Described scheduler module 13, specifically for evading mode of operation while being normal mode of operation, dispatched users on the left side edge carrier wave and/or right hand edge carrier wave when the interference of left hand edge carrier wave and/or right hand edge carrier wave;

When the interference of left hand edge carrier wave and/or right hand edge carrier wave is evaded mode of operation while being " shut " mode", dispatched users not on the left side edge carrier wave and/or right hand edge carrier wave;

Evade mode of operation while being limited operation pattern when the interference of left hand edge carrier wave and/or right hand edge carrier wave, carry out one of following mode or combination in any:

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, is preferably the resource on the non-left hand edge carrier wave of user assignment when scheduling; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, is preferably the resource on the non-right hand edge carrier wave of user assignment when scheduling;

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, and the user that when scheduling, service quality QoS grade is high is not dispatched to the resource on left hand edge carrier wave; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, the user that when scheduling, service quality QoS grade is high is not dispatched to the resource on right hand edge carrier wave;

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, the user at center, left hand edge carrier wave on dispatching cell or the good user of channel quality when scheduling; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern, the user at center, right hand edge carrier wave on dispatching cell or the good user of channel quality when scheduling on the right;

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, while being dispatched to the user's initial transmission on left hand edge carrier wave, adopts lower modulation coding mode MCS grade; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, while being dispatched to the user's initial transmission on right hand edge carrier wave, adopts lower modulation coding mode MCS grade.

Wherein, the modules of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into multiple submodules.

Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.

It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into multiple submodules.

The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.

Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.

Claims (20)

1. the interference bypassing method in cognitive radio system, is characterized in that, comprising:

Utilize radio environment information to determine the left hand edge carrier wave of authoring system to multicarrier cognitive radio system and/or the disturbed condition of right hand edge carrier wave;

Select the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to described disturbed condition;

Evading mode of operation according to the interference of described left hand edge carrier wave and/or right hand edge carrier wave carries out described in described multicarrier cognitive radio system to disturb and evades scheduling strategy corresponding to mode of operation.

2. the method for claim 1, is characterized in that, mode of operation is evaded in the described interference according to disturbed condition selection left hand edge carrier wave and/or right hand edge carrier wave, comprising:

The interference of whether opening left hand edge carrier wave and/or right hand edge carrier wave according to described disturbed condition judgement is evaded; If opening the interference of left hand edge carrier wave and/or right hand edge carrier wave evades, measure the left hand edge carrier wave of described multicarrier cognitive radio system and/or the interference level of right hand edge carrier wave, and select the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to the interference level of measuring.

3. method as claimed in claim 1 or 2, is characterized in that,

The described radio environment information of utilizing is determined the left hand edge carrier wave of authoring system to multicarrier cognitive radio system and/or the disturbed condition of right hand edge carrier wave, also comprises: the radio environment information that obtains multicarrier cognitive radio system present position by frequency spectrum perception mode before; And/or, obtain the radio environment information of multicarrier cognitive radio system present position by Query Database mode;

Described radio environment information comprises one of following or combination in any: the range information of transmitting power, authoring system and the multicarrier cognitive radio system of the idle frequency resource that can be used by multicarrier cognitive radio system, the measurement power that authoring system takies frequency, frequency that the authorized system in corresponding region, multicarrier cognitive radio system present position takies, authoring system.

4. method as claimed in claim 1 or 2, is characterized in that,

In the cognitive radio system that comprises multiple carrier waves, using operating frequency lower than the carrier wave of default first frequency as left hand edge carrier wave; Or, in the cognitive radio system of employing OFDM modulation system that only comprises a carrier wave, using operating frequency lower than the subcarrier of default second frequency as left hand edge carrier wave;

In the cognitive radio system that comprises multiple carrier waves, using operating frequency higher than the carrier wave of default the 3rd frequency as right hand edge carrier wave; Or, in the cognitive radio system of employing OFDM modulation system that only comprises a carrier wave, using operating frequency higher than the subcarrier of default the 4th frequency as right hand edge carrier wave.

5. method as claimed in claim 1 or 2, is characterized in that,

The described radio environment information of utilizing is determined the left hand edge carrier wave of authoring system to multicarrier cognitive radio system and/or the disturbed condition of right hand edge carrier wave, specifically comprises:

In the time that radio environment information comprises that authoring system takies the measurement power of frequency, utilize following formula to determine left hand edge carrier wave or disturbed condition corresponding to right hand edge carrier wave:

$I_L=\underset{i=1}{\overset{K_L}{\mathrm{\Σ}}}{P}_{L,i}\×{\mathrm{\Δ}}_{L,i};$

Wherein, I _lrepresent left hand edge carrier wave or the disturbed condition factor corresponding to right hand edge carrier wave, and the described disturbed condition factor is used for characterizing disturbed condition, P _l,irepresent to take than i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points the measurement power of frequency, K _lrepresent that authoring system takies the total quantity of frequency, Δ _l,irepresent than the corresponding capability correction factor of frequency interval of i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points and this multicarrier cognitive radio system bandwidth of operation left hand edge or right hand edge;

Or,

In the time that radio environment information comprises the range information of transmitting power, authoring system and multicarrier cognitive radio system of authoring system, utilize following formula to determine left hand edge carrier wave or disturbed condition corresponding to right hand edge carrier wave:

$I_L=\underset{i=1}{\overset{K_L}{\mathrm{\Σ}}}{P}_{L,i}^t\×{\mathrm{\Δ}}_{L,i}\×L_{L,i};$

Wherein, I _lrepresent left hand edge carrier wave or the disturbed condition factor corresponding to right hand edge carrier wave, and the described disturbed condition factor is used for characterizing disturbed condition, represent than the transmitting power of i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points, Δ _l,irepresent than the corresponding capability correction factor of frequency interval of i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points and this multicarrier cognitive radio system bandwidth of operation left hand edge or right hand edge, L _l,irepresent than i the path loss factor that authoring system is corresponding with the distance of multicarrier cognitive radio system in the low frequency range of multicarrier cognitive radio system working frequency points.

6. method as claimed in claim 2, is characterized in that, described interference of whether opening left hand edge carrier wave and/or right hand edge carrier wave according to disturbed condition judgement is evaded, and comprising:

In the time characterizing disturbed condition by the disturbed condition factor, in the time that the disturbed condition factor corresponding to left hand edge carrier wave is greater than default the first thresholding, opens the interference of left hand edge carrier wave and evade; Otherwise, do not open the interference of left hand edge carrier wave and evade; And/or, in the time that the disturbed condition factor corresponding to right hand edge carrier wave is greater than default the second thresholding, opens the interference of right hand edge carrier wave and evade; Otherwise, do not open the interference of right hand edge carrier wave and evade.

7. method as claimed in claim 2, is characterized in that, the left hand edge carrier wave of described measurement multicarrier cognitive radio system and/or the interference level of right hand edge carrier wave, comprising:

Left hand edge carrier wave in described multicarrier cognitive radio system and/or right hand edge carrier wave are mourned in silence in subframe, and in this subframe, measure the interference level on left hand edge carrier wave and/or right hand edge carrier wave.

8. method as claimed in claim 2, is characterized in that, mode of operation is evaded in the interference of the described selection left hand edge carrier wave of the interference level according to measurement and/or right hand edge carrier wave, comprising:

In the time that the interference level measured value on left hand edge carrier wave is less than default the 3rd thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection left hand edge carrier wave; When the interference level measured value on left hand edge carrier wave is not less than default the 3rd thresholding, and be less than while presetting the 4th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection left hand edge carrier wave; In the time that the interference level measured value on left hand edge carrier wave is not less than default the 4th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection left hand edge carrier wave; And/or,

In the time that the interference level measured value on right hand edge carrier wave is less than default the 5th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection right hand edge carrier wave; When the interference level measured value on right hand edge carrier wave is not less than default the 5th thresholding, and be less than while presetting the 6th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection right hand edge carrier wave; In the time that the interference level measured value on right hand edge carrier wave is not less than default the 6th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection right hand edge carrier wave.

9. the method for claim 1, is characterized in that, mode of operation is evaded in the described interference according to disturbed condition selection left hand edge carrier wave and/or right hand edge carrier wave, comprising:

In the time characterizing disturbed condition by the disturbed condition factor, in the time that the disturbed condition factor corresponding to left hand edge carrier wave is less than default the 7th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection left hand edge carrier wave; When the disturbed condition factor corresponding to left hand edge carrier wave is not less than default the 7th thresholding, and be less than while presetting the 8th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection left hand edge carrier wave; In the time that the disturbed condition factor corresponding to left hand edge carrier wave is not less than default the 8th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection left hand edge carrier wave; And/or,

In the time that the disturbed condition factor corresponding to right hand edge carrier wave is less than default the 9th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection right hand edge carrier wave; When the disturbed condition factor corresponding to right hand edge carrier wave is not less than default the 9th thresholding, and be less than while presetting the tenth thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection right hand edge carrier wave; In the time that the disturbed condition factor corresponding to right hand edge carrier wave is not less than default the tenth thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection right hand edge carrier wave.

10. the method as described in claim 1 or 8 or 9, is characterized in that,

The described interference according to left hand edge carrier wave and/or right hand edge carrier wave is evaded mode of operation and is carried out described in described multicarrier cognitive radio system to disturb and evade scheduling strategy corresponding to mode of operation, comprising:

When the interference of left hand edge carrier wave and/or right hand edge carrier wave is evaded mode of operation while being normal mode of operation, dispatched users on the left side edge carrier wave and/or right hand edge carrier wave;

When the interference of left hand edge carrier wave and/or right hand edge carrier wave is evaded mode of operation while being " shut " mode", dispatched users not on the left side edge carrier wave and/or right hand edge carrier wave;

Evade mode of operation while being limited operation pattern when the interference of left hand edge carrier wave and/or right hand edge carrier wave, carry out one of following mode or combination in any:

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, is preferably the resource on the non-left hand edge carrier wave of user assignment when scheduling; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, is preferably the resource on the non-right hand edge carrier wave of user assignment when scheduling;

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, and the user that when scheduling, service quality QoS grade is high is not dispatched to the resource on left hand edge carrier wave; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, the user that when scheduling, service quality QoS grade is high is not dispatched to the resource on right hand edge carrier wave;

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, the user at center, left hand edge carrier wave on dispatching cell or the good user of channel quality when scheduling; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern, the user at center, right hand edge carrier wave on dispatching cell or the good user of channel quality when scheduling on the right;

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, while being dispatched to the user's initial transmission on left hand edge carrier wave, adopts lower modulation coding mode MCS grade; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, while being dispatched to the user's initial transmission on right hand edge carrier wave, adopts lower modulation coding mode MCS grade.

Equipment is evaded in interference in 11. 1 kinds of cognitive radio systems, it is characterized in that, comprising:

Determination module, for utilizing radio environment information to determine the left hand edge carrier wave of authoring system to multicarrier cognitive radio system and/or the disturbed condition of right hand edge carrier wave;

Select module, for selecting the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to described disturbed condition;

Scheduler module, disturbs and evades scheduling strategy corresponding to mode of operation for evading according to the interference of described left hand edge carrier wave and/or right hand edge carrier wave described in mode of operation execution multicarrier cognitive radio system.

12. equipment as claimed in claim 11, is characterized in that, described selection module comprises:

Judge submodule, evade for the interference of whether opening left hand edge carrier wave and/or right hand edge carrier wave according to described disturbed condition judgement;

Measure submodule, for when judged result being the interference of unlatching left hand edge carrier wave and/or right hand edge carrier wave while evading, measure the left hand edge carrier wave of described multicarrier cognitive radio system and/or the interference level of right hand edge carrier wave;

The first chooser module, for selecting the interference of left hand edge carrier wave and/or right hand edge carrier wave to evade mode of operation according to the interference level of measuring.

13. equipment as described in claim 11 or 12, is characterized in that,

Described equipment also comprises: acquisition module, for obtain the radio environment information of multicarrier cognitive radio system present position by frequency spectrum perception mode; And/or, obtain the radio environment information of multicarrier cognitive radio system present position by Query Database mode;

Described radio environment information comprises one of following or combination in any: the range information of transmitting power, authoring system and the multicarrier cognitive radio system of the idle frequency resource that can be used by multicarrier cognitive radio system, the measurement power that authoring system takies frequency, frequency that the authorized system in corresponding region, multicarrier cognitive radio system present position takies, authoring system.

14. equipment as described in claim 11 or 12, is characterized in that,

Described determination module, also for comprising the cognitive radio system of multiple carrier waves, using operating frequency lower than the carrier wave of default first frequency as left hand edge carrier wave; Or, in the cognitive radio system of employing OFDM modulation system that only comprises a carrier wave, using operating frequency lower than the subcarrier of default second frequency as left hand edge carrier wave;

In the cognitive radio system that comprises multiple carrier waves, using operating frequency higher than the carrier wave of default the 3rd frequency as right hand edge carrier wave; Or, in the cognitive radio system of employing OFDM modulation system that only comprises a carrier wave, using operating frequency higher than the subcarrier of default the 4th frequency as right hand edge carrier wave.

15. equipment as described in claim 11 or 12, is characterized in that,

Described determination module, when comprising that in radio environment information authoring system takies the measurement power of frequency, utilizes following formula to determine left hand edge carrier wave or disturbed condition corresponding to right hand edge carrier wave:

$I_L=\underset{i=1}{\overset{K_L}{\mathrm{\Σ}}}{P}_{L,i}\×{\mathrm{\Δ}}_{L,i};$

Wherein, I _lrepresent left hand edge carrier wave or the disturbed condition factor corresponding to right hand edge carrier wave, and the described disturbed condition factor is used for characterizing disturbed condition, P _l,irepresent to take than i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points the measurement power of frequency, K _lrepresent that authoring system takies the total quantity of frequency, Δ _l,irepresent than the corresponding capability correction factor of frequency interval of i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points and this multicarrier cognitive radio system bandwidth of operation left hand edge or right hand edge;

Or,

In the time that radio environment information comprises the range information of transmitting power, authoring system and multicarrier cognitive radio system of authoring system, utilize following formula to determine left hand edge carrier wave or disturbed condition corresponding to right hand edge carrier wave:

$I_L=\underset{i=1}{\overset{K_L}{\mathrm{\Σ}}}{P}_{L,i}^t\×{\mathrm{\Δ}}_{L,i}\×L_{L,i};$

Wherein, I _lrepresent left hand edge carrier wave or the disturbed condition factor corresponding to right hand edge carrier wave, and the described disturbed condition factor is used for characterizing disturbed condition, represent than the transmitting power of i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points, Δ _l,irepresent than the corresponding capability correction factor of frequency interval of i the authoring system existing in the low frequency range of multicarrier cognitive radio system working frequency points and this multicarrier cognitive radio system bandwidth of operation left hand edge or right hand edge, L _l,irepresent than i the path loss factor that authoring system is corresponding with the distance of multicarrier cognitive radio system in the low frequency range of multicarrier cognitive radio system working frequency points.

16. equipment as claimed in claim 12, is characterized in that,

Described judgement submodule, specifically in the time characterizing disturbed condition by the disturbed condition factor, in the time that the disturbed condition factor corresponding to left hand edge carrier wave is greater than default the first thresholding, opens the interference of left hand edge carrier wave and evades; Otherwise, do not open the interference of left hand edge carrier wave and evade; And/or, in the time that the disturbed condition factor corresponding to right hand edge carrier wave is greater than default the second thresholding, opens the interference of right hand edge carrier wave and evade; Otherwise, do not open the interference of right hand edge carrier wave and evade.

17. equipment as claimed in claim 12, is characterized in that,

Described measurement submodule specifically for the left hand edge carrier wave in described multicarrier cognitive radio system and/or right hand edge carrier wave are mourned in silence in subframe, and is measured the interference level on left hand edge carrier wave and/or right hand edge carrier wave in this subframe.

18. equipment as claimed in claim 12, is characterized in that,

Described the first chooser module, while presetting the 3rd thresholding specifically for being less than when the interference level measured value on left hand edge carrier wave, it is normal mode of operation that mode of operation is evaded in the interference of selection left hand edge carrier wave; When the interference level measured value on left hand edge carrier wave is not less than default the 3rd thresholding, and be less than while presetting the 4th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection left hand edge carrier wave; In the time that the interference level measured value on left hand edge carrier wave is not less than default the 4th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection left hand edge carrier wave; And/or,

In the time that the interference level measured value on right hand edge carrier wave is less than default the 5th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection right hand edge carrier wave; When the interference level measured value on right hand edge carrier wave is not less than default the 5th thresholding, and be less than while presetting the 6th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection right hand edge carrier wave; In the time that the interference level measured value on right hand edge carrier wave is not less than default the 6th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection right hand edge carrier wave.

19. equipment as claimed in claim 11, is characterized in that, described selection module also comprises:

The second chooser module, in the time characterizing disturbed condition by the disturbed condition factor, in the time that the disturbed condition factor corresponding to left hand edge carrier wave is less than default the 7th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection left hand edge carrier wave; When the disturbed condition factor corresponding to left hand edge carrier wave is not less than default the 7th thresholding, and be less than while presetting the 8th thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection left hand edge carrier wave; In the time that the disturbed condition factor corresponding to left hand edge carrier wave is not less than default the 8th thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection left hand edge carrier wave; And/or,

In the time that the disturbed condition factor corresponding to right hand edge carrier wave is less than default the 9th thresholding, it is normal mode of operation that mode of operation is evaded in the interference of selection right hand edge carrier wave; When the disturbed condition factor corresponding to right hand edge carrier wave is not less than default the 9th thresholding, and be less than while presetting the tenth thresholding, it is limited operation pattern that mode of operation is evaded in the interference of selection right hand edge carrier wave; In the time that the disturbed condition factor corresponding to right hand edge carrier wave is not less than default the tenth thresholding, it is " shut " mode" that mode of operation is evaded in the interference of selection right hand edge carrier wave.

20. equipment as described in claim 11 or 18 or 19, is characterized in that,

Described scheduler module, specifically for evading mode of operation while being normal mode of operation, dispatched users on the left side edge carrier wave and/or right hand edge carrier wave when the interference of left hand edge carrier wave and/or right hand edge carrier wave;

When the interference of left hand edge carrier wave and/or right hand edge carrier wave is evaded mode of operation while being " shut " mode", dispatched users not on the left side edge carrier wave and/or right hand edge carrier wave;

Evade mode of operation while being limited operation pattern when the interference of left hand edge carrier wave and/or right hand edge carrier wave, carry out one of following mode or combination in any:

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, is preferably the resource on the non-left hand edge carrier wave of user assignment when scheduling; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, is preferably the resource on the non-right hand edge carrier wave of user assignment when scheduling;

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, and the user that when scheduling, service quality QoS grade is high is not dispatched to the resource on left hand edge carrier wave; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, the user that when scheduling, service quality QoS grade is high is not dispatched to the resource on right hand edge carrier wave;

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, the user at center, left hand edge carrier wave on dispatching cell or the good user of channel quality when scheduling; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern, the user at center, right hand edge carrier wave on dispatching cell or the good user of channel quality when scheduling on the right;

The interference of on the left side edge carrier wave is evaded mode of operation while being limited operation pattern, while being dispatched to the user's initial transmission on left hand edge carrier wave, adopts lower modulation coding mode MCS grade; And/or the interference of edge carrier wave is evaded mode of operation while being limited operation pattern on the right, while being dispatched to the user's initial transmission on right hand edge carrier wave, adopts lower modulation coding mode MCS grade.