CN105099964A - Method and equipment for estimating power intensity and determining interference cell - Google Patents

Abstract

The embodiment of the invention relates to the technical field of wireless communication, and especially relates to a method and equipment for estimating power intensity and determining an interference cell, wherein the method and equipment are used for solving a problem in the prior art that the estimated cell intensity is not accurate under the condition there is a strong interference cell because a strong interference signal is added to a frequency domain channel estimation result and the cell intensity cannot be estimated in a current interference cell intensity estimation scheme. According to the embodiment of the invention, frequency domain channel estimation is changed into time domain channel estimation, and a port corresponding to a tap, with the highest power, of a receiving antenna is searched in a time domain. Through effective diameter power sum, the power intensity estimation is carried out, thereby achieving the accurate estimation of cell intensity under the condition that the strong interference signal is added to the frequency domain channel estimation result, effectively overcoming noise or interference impact, and improving the accuracy of the estimated cell intensity.

Description

A kind of power level is estimated and is determined the method and apparatus of interfered cell

Technical field

The present invention relates to wireless communication technology field, particularly a kind of power level is estimated and is determined the method and apparatus of interfered cell.

Background technology

LTE (LongTermEvolution, Long Term Evolution) R11 (version 11) introduces FeICIC (FurtherEnhancedICIC, the Inter-Cell Interference Coordination of further enhancing) technology, reply isomery scene is as the adjacent area CRS (Cell-specificreferencesignals occurred under macro-pico (grand-slight) deployment scenario and macro-femto deployment scenario, the exclusive pilot signal in community)/PBCH (PhysicalBroadcastChannel, the Physical Broadcast Channel) strong jamming to local area.Under this scene, CRE (CellRangeExpansion, cell coverage expansion) zone user equipment is subject to the CRS of macro station or the strong jamming of common signal channel, and therefore, UE (subscriber equipment) needs to carry out interference to CRS/PBCH to be eliminated.

Current existing interfered cell intensity estimating step is as follows:

LS (LeastSquare least square) channel estimating is carried out to community and obtains channel estimation in frequency domain result $H_{\mathrm{cir},\mathrm{cell}\_i}^{(r,p)};$

By channel estimation in frequency domain result by ask power and mode calculate the RSRP (Referencesignalreceivedpower, Reference Signal Received Power) of each community.

When there being strong jamming adjacent area to deposit in case, superposed high reject signal in channel estimation in frequency domain result, current method accurately cannot estimate the intensity of community.

When interference elimination is carried out for UE, the matter of utmost importance that needs solve determines to include the set of cells that interference is eliminated and the order disturbing elimination in, if the order of non-choose reasonable interfered cell and interference delete, when so can cause interference delete, affect interfere information reconstruct because interfered cell channel estimating is inaccurate, finally affect the demodulation performance of subscriber equipment.

In sum, when there being strong jamming adjacent area to deposit in case, in channel estimation in frequency domain result, superposing high reject signal, accurately cannot estimate the intensity of community in the scheme that current interfered cell intensity is estimated, thus causing the cell strength of estimation inaccurate.

Summary of the invention

The method and apparatus that the embodiment of the present invention provides a kind of power level to estimate, strong jamming adjacent area is had to deposit in case in order to solve working as of existing in prior art, high reject signal has been superposed in channel estimation in frequency domain result, accurately cannot estimate the intensity of community in the scheme that current interfered cell intensity is estimated, thus cause the inaccurate problem of the cell strength of estimation.

The embodiment of the present invention also provides a kind of power level estimated value utilizing the embodiment of the present invention to obtain to determine the method and apparatus of interfered cell, reconstruct in order to solve the interfere information that affects because interfered cell channel estimating is inaccurate existed in prior art, finally affect the problem of the demodulation performance of subscriber equipment.

The method that a kind of power level that the embodiment of the present invention provides is estimated, comprising:

For an antenna, least square LS channel estimating is carried out to the Mei Lie community exclusive pilot signal CRS pilot tone of community and obtains channel estimation in frequency domain result corresponding to this reception antenna;

The described channel estimation in frequency domain result corresponding according to this antenna, determines port numbers;

Determine the tap threshold value often arranging CRS pilot tone of described port numbers corresponding ports;

To the footpath energy summation in all footpaths being greater than tap threshold value, obtain the tap threshold value reception antenna often arranging CRS pilot tone of this corresponding ports corresponding and value;

Being added every root reception antenna of described community with value, obtains the power level estimated value of described community.

Preferably, the described channel estimation in frequency domain result corresponding according to this antenna, determine port numbers, comprising:

The described channel estimation in frequency domain result corresponding according to this reception antenna, that determines each port of this reception antenna often arranges time domain channel shock response corresponding to CRS pilot tone;

The described time domain channel shock response corresponding according to the often row CRS pilot tone of each port of this reception antenna, that determines each port of this reception antenna often arranges tap power corresponding to CRS pilot tone;

Determine the port numbers that tap power maximum in all tap power that this reception antenna is corresponding is corresponding.

Preferably, determine the tap threshold value often arranging CRS pilot tone of described port numbers corresponding ports, comprising:

According to the noise tap often arranging the time domain impulse response of CRS pilot tone of described port numbers corresponding ports, determine the first threshold value often arranging CRS pilot tone, and according to the maximum tap that the time domain impulse often arranging CRS pilot tone of described port numbers corresponding ports responds, determine the second threshold value often arranging CRS pilot tone;

From often arranging the first threshold value of CRS pilot tone and the second threshold value the tap threshold value often arranging CRS pilot tone selecting maximum threshold value as described port numbers corresponding ports.

Preferably, determine according to following formula the first threshold value often arranging CRS pilot tone:

${\mathrm{\Γ}}_{\mathrm{noise},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}=\frac{{\mathrm{\β}}_{\mathrm{noise}}}{N^{,}-{\mathrm{\τ}}_{\mathrm{CP}}}\underset{i={\mathrm{\τ}}_{\mathrm{CP}}}{\overset{N^{,}-1}{\mathrm{\Σ}}}{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i{,}_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}$

Wherein, for of the port numbers p of the reception antenna r of cell i first threshold value of row CRS pilot tone; β _noisefor noise gate coefficient; τ _cPfor CP coefficient; for of the port numbers p corresponding ports of reception antenna r the noise tap of the time domain impulse response of row CRS pilot tone; Δ N is CRS pilot carrier frequency interval; N ' counts for IFFT, and p is the port numbers of the reception antenna r determined;

The second threshold value is determined according to following formula:

${\mathrm{\Γ}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}={\mathrm{\β}}_{\mathrm{cir}}\·\underset{p\∈[0,\tilde{P}-1]}{\max }\left\{{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}\right\},i=0,\·\·\·,N^{\′}-1$

Wherein, for of the port numbers p of the reception antenna r of cell i second threshold value of row CRS pilot tone; β _cirfor impulse response threshold coefficient; N ' counts for IFFT.

A kind of power level estimated value utilizing the method for the embodiment of the present invention to obtain that the embodiment of the present invention provides, determine the method for interfered cell, the method comprises:

For an adjacent area of this community, according to the power level estimated value of described adjacent area, determine respectively represent relation first ratio of adjacent area power and low noise and represent the second ratio of adjacent area power and local area power;

If described first ratio is greater than the 3rd threshold value, and described second ratio is greater than the 4th threshold value, then included in interference delete set of cells described adjacent area.

Preferably, the power level estimated value according to described adjacent area determines the first ratio, comprising:

Cause for the N time the ratio of the multiple antennas mean value of measurement as described first ratio the power level estimated value of described adjacent area and local area; Or

The ratio of the multiple antennas mean value of the M time noise testing power level estimated value of described adjacent area carried out with the upper subframe of use is as described first ratio; Wherein, N and M is positive integer;

Power level estimated value according to described adjacent area determines the second ratio, comprising:

Using the ratio of the power level estimated value of described adjacent area and the power level estimated value of this community as described second ratio.

Preferably, after described adjacent area being included in interference delete set of cells, also comprise:

If described in disturb each adjacent area of deleting in set of cells power level estimated value be greater than the power level estimated value of this community, Ze Jiangzhe community is got rid of and is deleted outside set of cells described disturbing;

Otherwise, this community is included in described interference delete set of cells.

Preferably, after this community being included in described interference delete set of cells, also comprise:

If all adjacent areas of described interference delete set of cells comprise specific adjacent area, then when arranging from big to small according to power level the adjacent area of described interference delete set of cells, this community is come before all specific adjacent areas; Or when arranging from small to large according to power level the adjacent area of described interference delete set of cells, this community is come after all specific adjacent areas;

Wherein, described specific cell is that the absolute value that corresponding power level estimated value equals the difference of the power level estimated value of the power level estimated value Huo Yuzhe community of this community is not more than the 5th threshold value, and the adjacent area of CRS collision occurs in Qie Yuzhe community.

The equipment that a kind of power level that the embodiment of the present invention provides is estimated, comprising:

Channel estimation module, for for an antenna, carries out least square LS channel estimating to the Mei Lie community exclusive pilot signal CRS pilot tone of community and obtains channel estimation in frequency domain result corresponding to this reception antenna;

Port determination module, for the described channel estimation in frequency domain result corresponding according to this antenna, determines port numbers;

Threshold value determination module, for determining the tap threshold value often arranging CRS pilot tone of described port numbers corresponding ports;

With value determination module, for the footpath energy summation in all footpaths being greater than tap threshold value, obtain the tap threshold value reception antenna often arranging CRS pilot tone of this corresponding ports corresponding and value;

Estimated value determination module, being added with value for the every root reception antenna by described community, obtains the power level estimated value of described community.

Preferably, described port determination module specifically for:

The described channel estimation in frequency domain result corresponding according to this reception antenna, that determines each port of this reception antenna often arranges time domain channel shock response corresponding to CRS pilot tone; The described time domain channel shock response corresponding according to the often row CRS pilot tone of each port of this reception antenna, that determines each port of this reception antenna often arranges tap power corresponding to CRS pilot tone; Determine the port numbers that tap power maximum in all tap power that this reception antenna is corresponding is corresponding.

Preferably, described threshold value determination module specifically for:

According to the noise tap often arranging the time domain impulse response of CRS pilot tone of described port numbers corresponding ports, determine the first threshold value often arranging CRS pilot tone, and according to the maximum tap that the time domain impulse often arranging CRS pilot tone of described port numbers corresponding ports responds, determine the second threshold value often arranging CRS pilot tone; From often arranging the first threshold value of CRS pilot tone and the second threshold value the tap threshold value often arranging CRS pilot tone selecting maximum threshold value as described port numbers corresponding ports.

Preferably, described threshold value determination module specifically for, determine according to following formula the first threshold value often arranging CRS pilot tone:

${\mathrm{\Γ}}_{\mathrm{noise},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}=\frac{{\mathrm{\β}}_{\mathrm{noise}}}{N^{,}-{\mathrm{\τ}}_{\mathrm{CP}}}\underset{i={\mathrm{\τ}}_{\mathrm{CP}}}{\overset{N^{,}-1}{\mathrm{\Σ}}}{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i{,}_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}$

Wherein, for of the port numbers p of the reception antenna r of cell i first threshold value of row CRS pilot tone; β _noisefor noise gate coefficient; τ _cPfor CP coefficient; for of the port numbers p corresponding ports of reception antenna r the noise tap of the time domain impulse response of row CRS pilot tone; Δ N is CRS pilot carrier frequency interval; N ' counts for IFFT, and p is the port numbers of the reception antenna r determined;

Described threshold value determination module specifically for, determine the second threshold value according to following formula:

${\mathrm{\Γ}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}={\mathrm{\β}}_{\mathrm{cir}}\·\underset{p\∈[0,\tilde{P}-1]}{\max }\left\{{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}\right\},i=0,\·\·\·,N^{\′}-1$

Wherein, for of the port numbers p of the reception antenna r of cell i second threshold value of row CRS pilot tone; β _cirfor impulse response threshold coefficient; N ' counts for IFFT.

The embodiment of the present invention provides a kind of power level estimated value utilizing embodiment of the present invention method to obtain to determine the equipment of interfered cell, and this equipment comprises:

Ratio determination module, for an adjacent area for this community, according to the power level estimated value of described adjacent area, determines represent relation first ratio of adjacent area power and low noise and represent the second ratio of adjacent area power and local area power respectively;

Processing module, if be greater than the 3rd threshold value for described first ratio, and described second ratio is greater than the 4th threshold value, then included in interference delete set of cells described adjacent area.

Preferably, described ratio determination module specifically for:

Cause for the N time the ratio of the multiple antennas mean value of measurement as described first ratio the power level estimated value of described adjacent area and local area; Or using the ratio of the power level estimated value of described adjacent area and the multiple antennas mean value of the M time noise testing using a upper subframe to carry out as described first ratio; Wherein, N and M is positive integer;

Using the ratio of the power level estimated value of described adjacent area and the power level estimated value of this community as described second ratio.

Preferably, described processing module also for:

If described in disturb each adjacent area of deleting in set of cells power level estimated value be greater than the power level estimated value of this community, Ze Jiangzhe community is got rid of and is deleted outside set of cells described disturbing; Otherwise, this community is included in described interference delete set of cells.

Preferably, described processing module also for:

If all adjacent areas of described interference delete set of cells comprise specific adjacent area, then when arranging from big to small according to power level the adjacent area of described interference delete set of cells, this community is come before all specific adjacent areas; Or when arranging from small to large according to power level the adjacent area of described interference delete set of cells, this community is come after all specific adjacent areas;

Wherein, described specific cell is that the absolute value that corresponding power level estimated value equals the difference of the power level estimated value of the power level estimated value Huo Yuzhe community of this community is not more than the 5th threshold value, and the adjacent area of CRS collision occurs in Qie Yuzhe community.

The embodiment of the present invention is by transforming to time domain by channel estimation in frequency domain, port corresponding to the most high power tap of reception antenna is found in time domain, by the power of effective diameter with carry out power level estimation, thus ought strong jamming adjacent area had to deposit in case, the intensity of community accurately can be estimated when having superposed high reject signal in channel estimation in frequency domain result, effectively can overcome the impact of noise or interference, improve the cell strength accuracy of estimation.

Accompanying drawing explanation

Fig. 1 is the method flow schematic diagram that the embodiment of the present invention one power level is estimated;

Fig. 2 is the method flow schematic diagram that the embodiment of the present invention two determines interfered cell;

Fig. 3 is the method flow schematic diagram that the embodiment of the present invention three determines interfered cell;

Fig. 4 is the device structure schematic diagram that the embodiment of the present invention four power level is estimated;

Fig. 5 is the device structure schematic diagram that the embodiment of the present invention five power level is estimated;

Fig. 6 is the device structure schematic diagram that the embodiment of the present invention six determines interfered cell;

Fig. 7 is the device structure schematic diagram that the embodiment of the present invention seven determines interfered cell.

Embodiment

The embodiment of the present invention is by transforming to time domain by channel estimation in frequency domain, port corresponding to the most high power tap of reception antenna is found in time domain, by the power of effective diameter with carry out power level estimation, thus ought strong jamming adjacent area had to deposit in case, the intensity of community accurately can be estimated when having superposed high reject signal in channel estimation in frequency domain result, effectively can overcome the impact of noise or interference, improve the cell strength accuracy of estimation.

As shown in Figure 1, the method that the embodiment of the present invention one power level is estimated comprises:

Step 100, for an antenna, the CRS pilot tone of often arranging of community is carried out to LS channel estimating and obtained channel estimation in frequency domain result corresponding to this reception antenna;

Step 101, the described channel estimation in frequency domain result corresponding according to this antenna, determine port numbers;

Step 102, determine the tap threshold value often arranging CRS pilot tone of described port numbers corresponding ports;

Step 103, to the footpath energy summation in all footpaths being greater than tap threshold value, obtain this reception antenna corresponding and value;

Step 104, being added every root reception antenna of described community with value, obtain the power level estimated value of described community.

Concrete, assuming that local area ID is adjacent cell ID is

To community cRS carry out LS channel estimating and obtain channel estimation in frequency domain result, be expressed as ${\hat{H}}_{\mathrm{LS},\mathrm{cell}\_i}^{(r,p)}=[{\hat{h}}_{\mathrm{LS},\mathrm{cell}\_i,0}^{(r,p)},\·\·\·,{\hat{h}}_{\mathrm{LS},\mathrm{cell}\_i,L_{\mathrm{RS}}^{\left(p\right)}-1}^{(r,p)}].$

Wherein, r is reception antenna index, and p is antenna port index, for the pilot tone columns of port p, represent the of port p the channel estimation in frequency domain result of row pilot tone.

In force, the described channel estimation in frequency domain result corresponding according to this antenna, determine port numbers, comprising:

The described channel estimation in frequency domain result corresponding according to this reception antenna, that determines each port of this reception antenna often arranges time domain channel shock response corresponding to CRS pilot tone;

The described time domain channel shock response corresponding according to the often row CRS pilot tone of each port of this reception antenna, that determines each port of this reception antenna often arranges tap power corresponding to CRS pilot tone;

Determine the port numbers that tap power maximum in all tap power that this reception antenna is corresponding is corresponding.

Concrete:

1, will the IFFT conversion doing at N ' obtains time domain channel impulse response

$H_{\mathrm{cir},\mathrm{cell}\_i}^{(r,p)}=[h_{\mathrm{cir},\mathrm{cell}\_i,0}^{(r,p)},\·\·\·,h_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}-1}^{(r,p)}];$

Wherein, $h_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{(r,p)}=\mathrm{IDFT}\left({\hat{h}}_{\mathrm{LS},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{(r,p)}\right).$ Preferably N ' is the integral number power of 2.

$h_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{(r,p)}=[h_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i=0}^{(r,p)},\·\·\·,h_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i=N^{\′}-1}^{(r,p)}]$

That 2, determines each port of this reception antenna often arranges tap power corresponding to CRS pilot tone ${\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{(r,p)}.$

Tap power for:

${\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{(r,p)}={[{\left|h_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i=0}^{(r,p)}\right|}^2,{\left|h_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i=1}^{(r,p)}\right|}^2,\·\·\·,{\left|h_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i=N^{\′}-1}^{(r,p)}\right|}^2]}^T$

3, community is determined the port numbers that the maximum power tap of reception antenna r is corresponding, is labeled as

Select ${\mathrm{pow}}_{\max ,\mathrm{cell}\_i}^{(r,p)}=\max \left\{{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i,m}^{(r,p)}\right\},m=0,\·\·\·,L_{\mathrm{RS}}^{\left(p\right)}-1;$

${\hat{p}}_{\mathrm{cell}\_i}^{\left(r\right)}=\underset{p}{\arg \max }\left\{{\mathrm{pow}}_{\max ,\mathrm{cell}\_i}^{(r,p)}\right\}.$

In force, determine the tap threshold value often arranging CRS pilot tone of described port numbers corresponding ports, comprising:

According to the noise tap often arranging the time domain impulse response of CRS pilot tone of described port numbers corresponding ports, determine the first threshold value often arranging CRS pilot tone, and according to the maximum tap that the time domain impulse often arranging CRS pilot tone of described port numbers corresponding ports responds, determine the second threshold value often arranging CRS pilot tone;

From often arranging the first threshold value of CRS pilot tone and the second threshold value the tap threshold value often arranging CRS pilot tone selecting maximum threshold value as described port numbers corresponding ports.

Concrete, determine the tap thresholding of reception antenna r

${\mathrm{\Γ}}_{\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}=\max \{{\mathrm{\Γ}}_{\mathrm{noise},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)},{\mathrm{\Γ}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}\}.$

Wherein, be the first threshold value, it is the second threshold value.Preferably, determine according to following formula the first threshold value often arranging CRS pilot tone:

${\mathrm{\Γ}}_{\mathrm{noise},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}=\frac{{\mathrm{\β}}_{\mathrm{noise}}}{N^{,}-{\mathrm{\τ}}_{\mathrm{CP}}}\underset{i={\mathrm{\τ}}_{\mathrm{CP}}}{\overset{N^{,}-1}{\mathrm{\Σ}}}{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i{,}_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}$

Wherein, for of the port numbers p of the reception antenna r of cell i first threshold value of row CRS pilot tone; β _noisefor noise gate coefficient; τ _cPfor CP coefficient; for of the port numbers p corresponding ports of reception antenna r the noise tap of the time domain impulse response of row CRS pilot tone; Δ N is CRS pilot carrier frequency interval; N ' counts for IFFT, and p is the port numbers of the reception antenna r determined;

The second threshold value is determined according to following formula:

${\mathrm{\Γ}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}={\mathrm{\β}}_{\mathrm{cir}}\·\underset{p\∈[0,\tilde{P}-1]}{\max }\left\{{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}\right\},i=0,\·\·\·,N^{\′}-1$

Wherein, for of the port numbers p of the reception antenna r of cell i second threshold value of row CRS pilot tone; β _cirfor impulse response threshold coefficient; N ' counts for IFFT.

In force, to the footpath energy summation in all footpaths being greater than tap threshold value, obtain this reception antenna corresponding with value time, find the footpath being greater than tap thresholding to gather namely find effective diameter, and the footpath energy summation of effective diameter is obtained

${\mathrm{pos}}_{m,\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}={\arg }_j\{{\mathrm{pow}}_{m,\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},j}^{\left(r\right)}<{\mathrm{\&Gamma;}}_{i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}\},j=0,\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;N-1;$

${\mathrm{spwr}}_{\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}=\underset{(j\&Element;\mathrm{pos})}{\mathrm{\&Sigma;}}{\mathrm{pow}}_{j,\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}.$

In force, being added every root reception antenna of described community with value, when obtaining the power level estimated value of described community, to each community carry out reception antenna and pilot tone row to be respectively added and to obtain the power level measurement result S of each community _{cell_i}(0≤i≤I), namely $S_{\mathrm{cell}\_i}=\underset{r}{\mathrm{\&Sigma;}}\underset{l_{\mathrm{RS}}^{\left(p\right)}}{\mathrm{\&Sigma;}}{\mathrm{spwr}}_{\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}.$

As shown in Figure 2, the embodiment of the present invention two is determined in the method for interfered cell, utilizes the power level estimated value of each community obtained in embodiment of the present invention Fig. 1, determines interfered cell.Specifically comprise the following steps:

Step 200, an adjacent area for this community, according to the power level estimated value of described adjacent area, determine represent relation first ratio of adjacent area power and low noise and represent the second ratio of adjacent area power and local area power respectively;

If described first ratio of step 201 is greater than the 3rd threshold value, and described second ratio is greater than the 4th threshold value, then included in interference delete set of cells described adjacent area.

In force, the power level estimated value according to described adjacent area determines the first ratio, comprising:

Cause for the N time the ratio of the multiple antennas mean value of measurement as described first ratio the power level estimated value of described adjacent area and local area; Or

The ratio of the multiple antennas mean value of the M time noise testing power level estimated value of described adjacent area carried out with the upper subframe of use is as described first ratio; Wherein, N and M is positive integer;

Power level estimated value according to described adjacent area determines the second ratio, comprising:

Using the ratio of the power level estimated value of described adjacent area and the power level estimated value of this community as described second ratio.

Concrete, thresholding the 3rd threshold T h3 and the 4th threshold T h4 is set, works as community meet $\frac{S_{\mathrm{cell}\_i(i>0)}}{{\mathrm{\&sigma;}}_{\mathrm{LS}}^2}>\mathrm{Th}3$ And $\frac{S_{\mathrm{cell}\_i(i>0)}}{S_{\mathrm{cell}\_0}}>\mathrm{Th}4$ Time, community include interference delete cell range in.

Wherein, for the local area multiple antennas mean value of first time noise testing or the multiple antennas mean value of the upper subframe second time noise testing of use.The set of cells satisfied condition is designated as element number be designated as N _{cell_Num}.

For paying close attention to two heterogeneous network macro-pico deployment scenario and macro-femto deployment scenario in the research of LTE system FeICIC., whether the embodiment of the present invention can also be selected to be included in deletion set of cells this community.Concrete:

After described adjacent area being included in interference delete set of cells, also comprise:

If described in disturb each adjacent area of deleting in set of cells power level estimated value be greater than the power level estimated value of this community, Ze Jiangzhe community is got rid of and is deleted outside set of cells described disturbing;

Otherwise, this community is included in described interference delete set of cells.

Such as: will gather in community S _{cell_i}(i >=0) sort from big to small namely obtain each community intensity sequence.If the set of cells that so parameter perturbation is deleted is otherwise the set of cells participating in interference delete is expressed as $\{N_{\mathrm{ID}}^{\mathrm{sort}\_i},1\&le;i\&le;N_{\mathrm{Cell}\_\mathrm{Num}}\}.$

Preferably, after this community being included in described interference delete set of cells, also comprise:

If all adjacent areas of described interference delete set of cells comprise specific adjacent area, then when arranging from big to small according to power level the adjacent area of described interference delete set of cells, this community is come before all specific adjacent areas; Or when arranging from small to large according to power level the adjacent area of described interference delete set of cells, this community is come after all specific adjacent areas;

Wherein, described specific cell is that the absolute value that corresponding power level estimated value equals the difference of the power level estimated value of the power level estimated value Huo Yuzhe community of this community is not more than the 5th threshold value, and the adjacent area of CRS collision occurs in Qie Yuzhe community.

Such as: if set community S _{cell_i}occur that intensity is equal or strength difference is very little and the situation of CRS collision, thresholding the 4th threshold T h4 or the 5th threshold T h5 has been set, characterizes power difference.|| S _{cell_0}-S _{cell_i}||≤Th4 or || S _{cell_0}-S _{cell_i}|| within≤Th5, during interference delete sequence, local area sequence is preferential.Because the general Timing Synchronization in this community is comparatively accurate, when power is close, channel estimating can be more accurate.

As can be seen from above-described embodiment: the embodiment of the present invention carries out sorting operation to multiple cell, allow UE carry out channel estimating to Qiang community at every turn, when occurring that CRS collides like this, first estimate that strong channels of neighboring areas is estimated, channel estimation accuracy is higher, after can effectively carrying out CRS interference delete, comparatively small-cell is carried out by channel estimating to power level, promote its channel estimation accuracy.Increase protection thresholding in addition, avoid minor interference adjacent area or local area power level higher time, introduce the deterioration that the operation of unnecessary interference delete brings performance.

As shown in Figure 3, the embodiment of the present invention three determines that the method for interfered cell comprises:

Assuming that local area ID is adjacent cell ID is

Step 300, to community cRS carry out LS channel estimating and obtain channel estimation in frequency domain, result is expressed as ${\hat{H}}_{\mathrm{LS},\mathrm{cell}\_i}^{(r,p)}=[{\hat{h}}_{\mathrm{LS},\mathrm{cell}\_i,0}^{(r,p)},\&CenterDot;\&CenterDot;\&CenterDot;,{\hat{h}}_{\mathrm{LS},\mathrm{cell}\_i,L_{\mathrm{RS}}^{\left(p\right)}-1}^{(r,p)}].$

Step 301, general the IFFT conversion making N point obtains time domain channel impulse response $H_{\mathrm{cir},\mathrm{cell}\_i}^{(r,p)}=[h_{\mathrm{cir},\mathrm{cell}\_i,0}^{(r,p)},\&CenterDot;\&CenterDot;\&CenterDot;,h_{\mathrm{cir},\mathrm{cell}\_i,L_{\mathrm{RS}}^{\left(p\right)}-1}^{(r,p)}].$

Step 302, calculating tap power

Step 303, determine community the port numbers that the maximum power tap of reception antenna r is corresponding, is labeled as

Step 304, determine reception antenna r port numbers the tap threshold value often arranging CRS pilot tone of corresponding ports

Step 305, to the footpath energy summation in all footpaths being greater than tap threshold value, obtain the tap threshold value reception antenna often arranging CRS pilot tone of this corresponding ports corresponding and value

Step 306, being added every root reception antenna of described community with value, obtain the power level estimated value S of described community _{cell_i}(0≤i≤I).

Step 307, an adjacent area for this community, according to the power level estimated value of described adjacent area, determine respectively represent relation first ratio of adjacent area power and low noise and represent the second ratio of adjacent area power and local area power, if described first ratio is greater than the 3rd threshold value, and described second ratio is greater than the 4th threshold value, then included in interference delete set of cells described adjacent area.

If the power level estimated value of disturbing each adjacent area of deleting in set of cells described in step 308 is greater than the power level estimated value of this community, the eliminating of Ze Jiangzhe community is deleted outside set of cells described disturbing; Otherwise, this community is included in described interference delete set of cells.

If all adjacent areas of step 309 described interference delete set of cells comprise specific adjacent area, then when arranging from big to small according to power level the adjacent area of described interference delete set of cells, this community is come before all specific adjacent areas; Or when arranging from small to large according to power level the adjacent area of described interference delete set of cells, this community is come after all specific adjacent areas.

Based on same inventive concept, the equipment that power level is estimated is additionally provided in the embodiment of the present invention, the equipment estimated due to power level is equipment corresponding to method that embodiment of the present invention Fig. 1 power level is estimated, and the principle that equipment is dealt with problems is similar to method, therefore the enforcement of equipment see the enforcement of method, can repeat part and repeats no more.

As shown in Figure 4, the equipment that the embodiment of the present invention four power level is estimated comprises:

Channel estimation module 400, for for an antenna, carries out least square LS channel estimating to the Mei Lie community exclusive pilot signal CRS pilot tone of community and obtains channel estimation in frequency domain result corresponding to this reception antenna;

Port determination module 410, for the described channel estimation in frequency domain result corresponding according to this antenna, determines port numbers;

Threshold value determination module 420, for determining the tap threshold value often arranging CRS pilot tone of described port numbers corresponding ports;

With value determination module 430, for the footpath energy summation in all footpaths being greater than tap threshold value, obtain the tap threshold value reception antenna often arranging CRS pilot tone of this corresponding ports corresponding and value;

Estimated value determination module 440, being added with value for the every root reception antenna by described community, obtains the power level estimated value of described community.

Preferably, described port determination module 410 specifically for:

The described channel estimation in frequency domain result corresponding according to this reception antenna, that determines each port of this reception antenna often arranges time domain channel shock response corresponding to CRS pilot tone; The described time domain channel shock response corresponding according to the often row CRS pilot tone of each port of this reception antenna, that determines each port of this reception antenna often arranges tap power corresponding to CRS pilot tone; Determine the port numbers that tap power maximum in all tap power that this reception antenna is corresponding is corresponding.

Preferably, described threshold value determination module 420 specifically for:

According to the noise tap often arranging the time domain impulse response of CRS pilot tone of described port numbers corresponding ports, determine the first threshold value often arranging CRS pilot tone, and according to the maximum tap that the time domain impulse often arranging CRS pilot tone of described port numbers corresponding ports responds, determine the second threshold value often arranging CRS pilot tone; From often arranging the first threshold value of CRS pilot tone and the second threshold value the tap threshold value often arranging CRS pilot tone selecting maximum threshold value as described port numbers corresponding ports.

Preferably, described threshold value determination module 420 specifically for, determine according to following formula the first threshold value often arranging CRS pilot tone:

${\mathrm{\&Gamma;}}_{\mathrm{noise},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{noise}}}{N^{,}-{\mathrm{\&tau;}}_{\mathrm{CP}}}\underset{i={\mathrm{\&tau;}}_{\mathrm{CP}}}{\overset{N^{,}-1}{\mathrm{\&Sigma;}}}{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i{,}_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}$

Wherein, for of the port numbers p of the reception antenna r of cell i first threshold value of row CRS pilot tone; β _noisefor noise gate coefficient; τ _cPfor CP coefficient; for of the port numbers p corresponding ports of reception antenna r the noise tap of the time domain impulse response of row CRS pilot tone; Δ N is CRS pilot carrier frequency interval; N ' counts for IFFT, and p is the port numbers of the reception antenna r determined;

Preferably, described threshold value determination module 420 specifically for, determine the second threshold value according to following formula:

${\mathrm{\&Gamma;}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}={\mathrm{\&beta;}}_{\mathrm{cir}}\&CenterDot;\underset{p\&Element;[0,\tilde{P}-1]}{\max }\left\{{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}\right\},i=0,\&CenterDot;\&CenterDot;\&CenterDot;,N^{\&prime;}-1$

Wherein, for of the port numbers p of the reception antenna r of cell i second threshold value of row CRS pilot tone; β _cirfor impulse response threshold coefficient; N ' counts for IFFT.

As shown in Figure 5, the equipment that the embodiment of the present invention five power level is estimated,

Processor 500, for for an antenna, carries out least square LS channel estimating to the Mei Lie community exclusive pilot signal CRS pilot tone of community and obtains channel estimation in frequency domain result corresponding to this reception antenna; The described channel estimation in frequency domain result corresponding according to this antenna, determines port numbers; Determine the tap threshold value often arranging CRS pilot tone of described port numbers corresponding ports; To the footpath energy summation in all footpaths being greater than tap threshold value, obtain the tap threshold value reception antenna often arranging CRS pilot tone of this corresponding ports corresponding and value; Being added every root reception antenna of described community with value, obtains the power level estimated value of described community;

Transceiver 510, for receiving under control of the processor 500 and sending data.

Preferably, described processor 500 specifically for:

The described channel estimation in frequency domain result corresponding according to this reception antenna, that determines each port of this reception antenna often arranges time domain channel shock response corresponding to CRS pilot tone; The described time domain channel shock response corresponding according to the often row CRS pilot tone of each port of this reception antenna, that determines each port of this reception antenna often arranges tap power corresponding to CRS pilot tone; Determine the port numbers that tap power maximum in all tap power that this reception antenna is corresponding is corresponding.

Preferably, described processor 500 specifically for:

According to the noise tap often arranging the time domain impulse response of CRS pilot tone of described port numbers corresponding ports, determine the first threshold value often arranging CRS pilot tone, and according to the maximum tap that the time domain impulse often arranging CRS pilot tone of described port numbers corresponding ports responds, determine the second threshold value often arranging CRS pilot tone; From often arranging the first threshold value of CRS pilot tone and the second threshold value the tap threshold value often arranging CRS pilot tone selecting maximum threshold value as described port numbers corresponding ports.

Preferably, described processor 500 specifically for, determine according to following formula the first threshold value often arranging CRS pilot tone:

${\mathrm{\&Gamma;}}_{\mathrm{noise},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{noise}}}{N^{,}-{\mathrm{\&tau;}}_{\mathrm{CP}}}\underset{i={\mathrm{\&tau;}}_{\mathrm{CP}}}{\overset{N^{,}-1}{\mathrm{\&Sigma;}}}{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i{,}_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}$

Wherein, for of the port numbers p of the reception antenna r of cell i first threshold value of row CRS pilot tone; β _noisefor noise gate coefficient; τ _cPfor CP coefficient; for of the port numbers p corresponding ports of reception antenna r the noise tap of the time domain impulse response of row CRS pilot tone; Δ N is CRS pilot carrier frequency interval; N ' counts for IFFT, and p is the port numbers of the reception antenna r determined;

Preferably, described processor 500 specifically for, determine the second threshold value according to following formula:

${\mathrm{\&Gamma;}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}={\mathrm{\&beta;}}_{\mathrm{cir}}\&CenterDot;\underset{p\&Element;[0,\tilde{P}-1]}{\max }\left\{{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}\right\},i=0,\&CenterDot;\&CenterDot;\&CenterDot;,N^{\&prime;}-1$

Wherein, for of the port numbers p of the reception antenna r of cell i second threshold value of row CRS pilot tone; β _cirfor impulse response threshold coefficient; N ' counts for IFFT.

Wherein, in Figure 5, bus architecture can comprise interconnected bus and the bridge of any amount, and the various electrical chains of the memory that the one or more processor specifically represented by processor 500 and memory 520 represent are connected together.Other electrical chains various of such as ancillary equipment, pressurizer and management circuit etc. and so on can also be connected together by bus architecture, and these are all known in the field, therefore, are no longer described further it herein.Bus interface provides interface.Transceiver 510 can be multiple element, namely comprises transmitter and receiver, is provided for the unit communicated with other devices various over a transmission medium.Processor 500 is in charge of bus architecture and common process, and memory 520 can the data that use when executable operations of storage of processor 500.

Processor 500 is in charge of bus architecture and common process, and memory 520 can the data that use when executable operations of storage of processor 500.

Based on same inventive concept, the equipment determining interfered cell is additionally provided in the embodiment of the present invention, the equipment estimated due to power level is that embodiment of the present invention Fig. 2 determines the equipment that the method for interfered cell is corresponding, and the principle that equipment is dealt with problems is similar to method, therefore the enforcement of equipment see the enforcement of method, can repeat part and repeats no more.

As shown in Figure 6, the embodiment of the present invention six determines the equipment of interfered cell, and the power level estimated value utilizing the embodiment of the present invention to obtain determines interfered cell, specifically comprises:

Ratio determination module 600, for an adjacent area for this community, according to the power level estimated value of described adjacent area, determines represent relation first ratio of adjacent area power and low noise and represent the second ratio of adjacent area power and local area power respectively;

Processing module 610, if be greater than the 3rd threshold value for described first ratio, and described second ratio is greater than the 4th threshold value, then included in interference delete set of cells described adjacent area.

Preferably, described ratio determination module 600 specifically for:

Cause for the N time the ratio of the multiple antennas mean value of measurement as described first ratio the power level estimated value of described adjacent area and local area; Or using the ratio of the power level estimated value of described adjacent area and the multiple antennas mean value of the M time noise testing using a upper subframe to carry out as described first ratio; Wherein, N and M is positive integer;

Using the ratio of the power level estimated value of described adjacent area and the power level estimated value of this community as described second ratio.

Preferably, described processing module 610 also for:

If described in disturb each adjacent area of deleting in set of cells power level estimated value be greater than the power level estimated value of this community, Ze Jiangzhe community is got rid of and is deleted outside set of cells described disturbing; Otherwise, this community is included in described interference delete set of cells.

Preferably, described processing module 610 also for:

If all adjacent areas of described interference delete set of cells comprise specific adjacent area, then when arranging from big to small according to power level the adjacent area of described interference delete set of cells, this community is come before all specific adjacent areas; Or when arranging from small to large according to power level the adjacent area of described interference delete set of cells, this community is come after all specific adjacent areas;

Wherein, described specific cell is that the absolute value that corresponding power level estimated value equals the difference of the power level estimated value of the power level estimated value Huo Yuzhe community of this community is not more than the 5th threshold value, and the adjacent area of CRS collision occurs in Qie Yuzhe community.

Wherein, due to power level estimate equipment and determine that the equipment of interfered cell can be an equipment, so the module of Fig. 4 and Fig. 6 can be combined in an entity.

As shown in Figure 7, the embodiment of the present invention seven determines the equipment of interfered cell, and the power level estimated value utilizing the embodiment of the present invention to obtain determines interfered cell, specifically comprises:

Processor 700, for an adjacent area for this community, according to the power level estimated value of described adjacent area, determines represent relation first ratio of adjacent area power and low noise and represent the second ratio of adjacent area power and local area power respectively; If described first ratio is greater than the 3rd threshold value, and described second ratio is greater than the 4th threshold value, then include in interference delete set of cells by described adjacent area;

Transceiver 710, for receiving and sending data under the control of processor 700.

Preferably, described processor 700 specifically for:

Cause for the N time the ratio of the multiple antennas mean value of measurement as described first ratio the power level estimated value of described adjacent area and local area; Or using the ratio of the power level estimated value of described adjacent area and the multiple antennas mean value of the M time noise testing using a upper subframe to carry out as described first ratio; Wherein, N and M is positive integer;

Using the ratio of the power level estimated value of described adjacent area and the power level estimated value of this community as described second ratio.

Preferably, described processor 700 also for:

If described in disturb each adjacent area of deleting in set of cells power level estimated value be greater than the power level estimated value of this community, Ze Jiangzhe community is got rid of and is deleted outside set of cells described disturbing; Otherwise, this community is included in described interference delete set of cells.

Preferably, described processor 700 also for:

If all adjacent areas of described interference delete set of cells comprise specific adjacent area, then when arranging from big to small according to power level the adjacent area of described interference delete set of cells, this community is come before all specific adjacent areas; Or when arranging from small to large according to power level the adjacent area of described interference delete set of cells, this community is come after all specific adjacent areas;

Wherein, described specific cell is that the absolute value that corresponding power level estimated value equals the difference of the power level estimated value of the power level estimated value Huo Yuzhe community of this community is not more than the 5th threshold value, and the adjacent area of CRS collision occurs in Qie Yuzhe community.

Wherein, in the figure 7, bus architecture can comprise interconnected bus and the bridge of any amount, and the various electrical chains of the memory that the one or more processor specifically represented by processor 700 and memory 720 represent are connected together.Other electrical chains various of such as ancillary equipment, pressurizer and management circuit etc. and so on can also be connected together by bus architecture, and these are all known in the field, therefore, are no longer described further it herein.Bus interface provides interface.Transceiver 710 can be multiple element, namely comprises transmitter and receiver, is provided for the unit communicated with other devices various over a transmission medium.Processor 700 is in charge of bus architecture and common process, and memory 720 can the data that use when executable operations of storage of processor 700.

Processor 700 is in charge of bus architecture and common process, and memory 720 can the data that use when executable operations of storage of processor 700.

Wherein, due to power level estimate equipment and determine that the equipment of interfered cell can be an equipment, so the module of Fig. 5 and Fig. 7 can be combined in an entity.

As can be seen from above-described embodiment: the embodiment of the present invention is by transforming to time domain by channel estimation in frequency domain, port corresponding to the most high power tap of reception antenna is found in time domain, by the power of effective diameter with carry out power level estimation, thus ought strong jamming adjacent area had to deposit in case, the intensity of community accurately can be estimated when having superposed high reject signal in channel estimation in frequency domain result, effectively can overcome the impact of noise or interference, improve the cell strength accuracy of estimation.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (16)

1. a method for power level estimation, it is characterized in that, the method comprises:

For an antenna, least square LS channel estimating is carried out to the Mei Lie community exclusive pilot signal CRS pilot tone of community and obtains channel estimation in frequency domain result corresponding to this reception antenna;

The described channel estimation in frequency domain result corresponding according to this antenna, determines port numbers;

Determine the tap threshold value often arranging CRS pilot tone of described port numbers corresponding ports;

To the footpath energy summation in all footpaths being greater than tap threshold value, obtain the tap threshold value reception antenna often arranging CRS pilot tone of this corresponding ports corresponding and value;

Being added every root reception antenna of described community with value, obtains the power level estimated value of described community.

2. the method for claim 1, is characterized in that, the described channel estimation in frequency domain result corresponding according to this antenna, determines port numbers, comprising:

The described channel estimation in frequency domain result corresponding according to this reception antenna, that determines each port of this reception antenna often arranges time domain channel shock response corresponding to CRS pilot tone;

The described time domain channel shock response corresponding according to the often row CRS pilot tone of each port of this reception antenna, that determines each port of this reception antenna often arranges tap power corresponding to CRS pilot tone;

Determine the port numbers that tap power maximum in all tap power that this reception antenna is corresponding is corresponding.

3. the method for claim 1, is characterized in that, determines the tap threshold value often arranging CRS pilot tone of described port numbers corresponding ports, comprising:

According to the noise tap often arranging the time domain impulse response of CRS pilot tone of described port numbers corresponding ports, determine the first threshold value often arranging CRS pilot tone, and according to the maximum tap that the time domain impulse often arranging CRS pilot tone of described port numbers corresponding ports responds, determine the second threshold value often arranging CRS pilot tone;

From often arranging the first threshold value of CRS pilot tone and the second threshold value the tap threshold value often arranging CRS pilot tone selecting maximum threshold value as described port numbers corresponding ports.

4. method as claimed in claim 3, is characterized in that, determine according to following formula the first threshold value often arranging CRS pilot tone:

${\mathrm{\&Gamma;}}_{\mathrm{noise},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{noise}}}{N^{,}-{\mathrm{\&tau;}}_{\mathrm{CP}}}\underset{i={\mathrm{\&tau;}}_{\mathrm{CP}}}{\overset{N^{,}-1}{\mathrm{\&Sigma;}}}{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i{,}_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}$

Wherein, for of the port numbers p of the reception antenna r of cell i first threshold value of row CRS pilot tone; β _noisefor noise gate coefficient; τ _cPfor CP coefficient; for of the port numbers p corresponding ports of reception antenna r the noise tap of the time domain impulse response of row CRS pilot tone; Δ N is CRS pilot carrier frequency interval; N ' counts for IFFT, and p is the port numbers of the reception antenna r determined;

The second threshold value is determined according to following formula:

${\mathrm{\&Gamma;}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}={\mathrm{\&beta;}}_{\mathrm{cir}}\&CenterDot;\underset{p\&Element;[0,\tilde{P}-1]}{\max }\left\{{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}\right\},i=0,\&CenterDot;\&CenterDot;\&CenterDot;,N^{\&prime;}-1$

Wherein, for of the port numbers p of the reception antenna r of cell i second threshold value of row CRS pilot tone; β _cirfor impulse response threshold coefficient; N ' counts for IFFT.

5. utilize the power level estimated value that claim 1 ~ 4 either method obtains, determine the method for interfered cell, it is characterized in that, the method comprises:

For an adjacent area of this community, according to the power level estimated value of described adjacent area, determine respectively represent relation first ratio of adjacent area power and low noise and represent the second ratio of adjacent area power and local area power;

If described first ratio is greater than the 3rd threshold value, and described second ratio is greater than the 4th threshold value, then included in interference delete set of cells described adjacent area.

6. method as claimed in claim 5, it is characterized in that, the power level estimated value according to described adjacent area determines the first ratio, comprising:

Cause for the N time the ratio of the multiple antennas mean value of measurement as described first ratio the power level estimated value of described adjacent area and local area; Or

The ratio of the multiple antennas mean value of the M time noise testing power level estimated value of described adjacent area carried out with the upper subframe of use is as described first ratio; Wherein, N and M is positive integer;

Power level estimated value according to described adjacent area determines the second ratio, comprising:

Using the ratio of the power level estimated value of described adjacent area and the power level estimated value of this community as described second ratio.

7. the method as described in claim 5 or 6, is characterized in that, after being included in described adjacent area in interference delete set of cells, also comprises:

If described in disturb each adjacent area of deleting in set of cells power level estimated value be greater than the power level estimated value of this community, Ze Jiangzhe community is got rid of and is deleted outside set of cells described disturbing;

Otherwise, this community is included in described interference delete set of cells.

8. method as claimed in claim 7, is characterized in that, after being included in this community in described interference delete set of cells, also comprise:

If all adjacent areas of described interference delete set of cells comprise specific adjacent area, then when arranging from big to small according to power level the adjacent area of described interference delete set of cells, this community is come before all specific adjacent areas; Or when arranging from small to large according to power level the adjacent area of described interference delete set of cells, this community is come after all specific adjacent areas;

Wherein, described specific cell is that the absolute value that corresponding power level estimated value equals the difference of the power level estimated value of the power level estimated value Huo Yuzhe community of this community is not more than the 5th threshold value, and the adjacent area of CRS collision occurs in Qie Yuzhe community.

9. an equipment for power level estimation, it is characterized in that, this equipment comprises:

Channel estimation module, for for an antenna, carries out least square LS channel estimating to the Mei Lie community exclusive pilot signal CRS pilot tone of community and obtains channel estimation in frequency domain result corresponding to this reception antenna;

Port determination module, for the described channel estimation in frequency domain result corresponding according to this antenna, determines port numbers;

Threshold value determination module, for determining the tap threshold value often arranging CRS pilot tone of described port numbers corresponding ports;

With value determination module, for the footpath energy summation in all footpaths being greater than tap threshold value, obtain the tap threshold value reception antenna often arranging CRS pilot tone of this corresponding ports corresponding and value;

Estimated value determination module, being added with value for the every root reception antenna by described community, obtains the power level estimated value of described community.

10. equipment as claimed in claim 9, is characterized in that, described port determination module specifically for:

The described channel estimation in frequency domain result corresponding according to this reception antenna, that determines each port of this reception antenna often arranges time domain channel shock response corresponding to CRS pilot tone; The described time domain channel shock response corresponding according to the often row CRS pilot tone of each port of this reception antenna, that determines each port of this reception antenna often arranges tap power corresponding to CRS pilot tone; Determine the port numbers that tap power maximum in all tap power that this reception antenna is corresponding is corresponding.

11. equipment as claimed in claim 9, is characterized in that, described threshold value determination module specifically for:

According to the noise tap often arranging the time domain impulse response of CRS pilot tone of described port numbers corresponding ports, determine the first threshold value often arranging CRS pilot tone, and according to the maximum tap that the time domain impulse often arranging CRS pilot tone of described port numbers corresponding ports responds, determine the second threshold value often arranging CRS pilot tone; From often arranging the first threshold value of CRS pilot tone and the second threshold value the tap threshold value often arranging CRS pilot tone selecting maximum threshold value as described port numbers corresponding ports.

12. equipment as claimed in claim 11, is characterized in that, described threshold value determination module specifically for, determine according to following formula the first threshold value often arranging CRS pilot tone:

${\mathrm{\&Gamma;}}_{\mathrm{noise},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{noise}}}{N^{,}-{\mathrm{\&tau;}}_{\mathrm{CP}}}\underset{i={\mathrm{\&tau;}}_{\mathrm{CP}}}{\overset{N^{,}-1}{\mathrm{\&Sigma;}}}{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i{,}_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}$

Wherein, for of the port numbers p of the reception antenna r of cell i first threshold value of row CRS pilot tone; β _noisefor noise gate coefficient; τ _cPfor CP coefficient; for of the port numbers p corresponding ports of reception antenna r the noise tap of the time domain impulse response of row CRS pilot tone; Δ N is CRS pilot carrier frequency interval; N ' counts for IFFT, and p is the port numbers of the reception antenna r determined;

Described threshold value determination module specifically for, determine the second threshold value according to following formula:

${\mathrm{\&Gamma;}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)}}^{\left(r\right)}={\mathrm{\&beta;}}_{\mathrm{cir}}\&CenterDot;\underset{p\&Element;[0,\tilde{P}-1]}{\max }\left\{{\mathrm{pow}}_{\mathrm{cir},\mathrm{cell}\_i,l_{\mathrm{RS}}^{\left(p\right)},i}^{(r,p)}\right\},i=0,\&CenterDot;\&CenterDot;\&CenterDot;,N^{\&prime;}-1$

Wherein, for of the port numbers p of the reception antenna r of cell i second threshold value of row CRS pilot tone; β _cirfor impulse response threshold coefficient; N ' counts for IFFT.

13. 1 kinds of power level estimated values utilizing claim 1 ~ 4 either method to obtain determine the equipment of interfered cell, it is characterized in that, this equipment comprises:

Ratio determination module, for an adjacent area for this community, according to the power level estimated value of described adjacent area, determines represent relation first ratio of adjacent area power and low noise and represent the second ratio of adjacent area power and local area power respectively;

Processing module, if be greater than the 3rd threshold value for described first ratio, and described second ratio is greater than the 4th threshold value, then included in interference delete set of cells described adjacent area.

14. equipment as claimed in claim 13, is characterized in that, described ratio determination module specifically for:

Cause for the N time the ratio of the multiple antennas mean value of measurement as described first ratio the power level estimated value of described adjacent area and local area; Or using the ratio of the power level estimated value of described adjacent area and the multiple antennas mean value of the M time noise testing using a upper subframe to carry out as described first ratio; Wherein, N and M is positive integer;

Using the ratio of the power level estimated value of described adjacent area and the power level estimated value of this community as described second ratio.

15. equipment as described in claim 13 or 14, is characterized in that, described processing module also for:

If described in disturb each adjacent area of deleting in set of cells power level estimated value be greater than the power level estimated value of this community, Ze Jiangzhe community is got rid of and is deleted outside set of cells described disturbing; Otherwise, this community is included in described interference delete set of cells.

16. equipment as claimed in claim 14, is characterized in that, described processing module also for:

If all adjacent areas of described interference delete set of cells comprise specific adjacent area, then when arranging from big to small according to power level the adjacent area of described interference delete set of cells, this community is come before all specific adjacent areas; Or when arranging from small to large according to power level the adjacent area of described interference delete set of cells, this community is come after all specific adjacent areas;

Wherein, described specific cell is that the absolute value that corresponding power level estimated value equals the difference of the power level estimated value of the power level estimated value Huo Yuzhe community of this community is not more than the 5th threshold value, and the adjacent area of CRS collision occurs in Qie Yuzhe community.