CN102655652B - Method and equipment for detecting far-end interference - Google Patents

Abstract

The invention discloses a method and equipment for detecting far-end interference. The method comprises the following steps that: base station equipment acquires a receiving signal of a far-end interference measurement subframe; and the base station equipment detects the receiving signal and determines whether far-end interference exists or does not exist according to the detection result. According to the embodiments, the base station equipment can detect the far-end interference by judging whether the power of the receiving signal at an appointed measurement position is trailed according to the characteristic that the power of the signal is trailed when a far-end interference signal reaches a cell, so that the far-end interference can be monitored in real time; once the far-end interference is found, the base station equipment can sound an alarm immediately and supply a measurement basis to a network optimization worker for taking corresponding far-end interference solution measures.

Description

A kind of detection method of far-end interference and equipment

Technical field

The present invention relates to communication technical field, particularly relate to a kind of detection method and equipment of far-end interference.

Background technology

TD-LTE (TD-SCDMA Long Term Evolution, TD SDMA Long Term Evolution) system adopts TDD mode, needs to keep synchronous between different base station.Certain height level is reached at telepoint base station, and existence " lower atmosphere waveguide " phenomenon (is now similar to free-space propagation, signal can bypass ground level and realizes over the horizon transmission) when, interference base station is at conventional descending sub frame and DwPTS (Downlink Pilot Time Slot, descending pilot frequency time slot) in the downstream signal of high-power transmitting, may at the UpPTS of disturbed base station (Uplink Pilot Time Slot after propagation delay, uplink pilot time slot) arrive, thus the UpPTS to disturbed base station, or even the reception of uplink business data is had an impact.As shown in Figure 1, for the schematic diagram of TD-LTE far-end interference scene, only illustrate far-end interference with the downstream signal of a base station in FIG, but in actual environment, far-end interference may be the close coefficient result in cluster base station in position, and namely interference signal can be the aliasing of the downstream signal of multiple base station.

As shown in Figure 2, for adopting TDD (the Time Division Duplexing of TYPE2 (type 2) in TD-LTE system, time division duplex) frame structure (5ms conversion interval), the special subframe of this frame structure comprises three special time slots: DwPTS, GP (protection time slot) and UpPTS, DwPTS transmits PSS (the Primary Synchronization Signal in cell downlink synchronizing signal, master sync signal), PCFICH (Physical Control Format Indicator Channel, Physical Control Format Indicator Channel), PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel), PHICH (Physical HARQ Indication Channel, physical mixed automatic re-transmission indicating channel), PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) etc., UpPTS transmits PRACH (Packet Random Access Channel, Packet Random Access Channel) and SRS (Sounding Reference Signal, monitoring reference signal), PUSCH (Physical Uplink Shared Channel can not be transmitted, Physical Uplink Shared Channel) and PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel), GP is the guard time interval between DwPTS and UpPTS, mainly in order to avoid the data in the DwPTS caused due to multidiameter are to the interference of data in UpPTS.

In order to support the radius of society of different size, provide the length config option of multiple special subframe in TD-LTE system, namely the length of 3 special time slots can be joined flexibly, as shown in table 1, is the configuration format of special subframe; Such as, under conventional CP (Cyclic Prefix, Cyclic Prefix), the special subframe corresponding to the shortest GP length is configured to DwPTS: GP: UpPTS=11: 1: 2 or DwPTS: GP: UpPTS=12: 1: 1; The special subframe corresponding to the longest GP length is configured to DwPTS: GP: UpPTS=3: 10: 1.

Table 1

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

At the application initial stage of TD-LTE system, emphasis of arranging net is it is considered that focus covers, and far-end interference phenomenon can not be very outstanding, therefore do not have for the far-end interference detection method after TD-LTE networking in prior art.

Summary of the invention

The embodiment of the present invention provides a kind of detection method and equipment of far-end interference, to detect far-end interference.

In order to achieve the above object, the embodiment of the present invention provides a kind of detection method of far-end interference, comprising:

Base station equipment obtains the Received signal strength that far-end interference measures subframe;

Described base station equipment detects described Received signal strength, and determines there is far-end interference or there is not far-end interference according to testing result.

The embodiment of the present invention provides a kind of base station equipment, comprising:

Acquisition module, measures the Received signal strength of subframe for obtaining far-end interference;

Processing module, for detecting described Received signal strength, and determines there is far-end interference or there is not far-end interference according to testing result.

Compared with prior art, the embodiment of the present invention at least has the following advantages: when arriving this community according to far end interfering signal, signal power can form the feature of hangover, base station equipment can by judging whether the power of the Received signal strength on specified measurement position exists hangover, detect far-end interference situation, thus the Real-Time Monitoring realized far-end interference, once find to there is far-end interference, then can alarm in time, and take corresponding far-end interference solution to provide beasurement base for network optimization personnel.

Accompanying drawing explanation

In order to be illustrated more clearly in technical scheme of the present invention, below the accompanying drawing used required in describing embodiment 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, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the schematic diagram of TD-LTE far-end interference scene in prior art;

Fig. 2 is the schematic diagram of the tdd frame structure adopting TYPE2 in prior art in TD-LTE system;

Fig. 3 is the detection method schematic flow sheet of a kind of far-end interference that the embodiment of the present invention one provides;

Fig. 4 is the schematic flow sheet that whether to there is in UpPTS that the hangover of far-end interference and base station equipment judge Received signal strength whether sustainable existence far-end interference in the UpPTS judging Received signal strength to base station equipment that provides in the embodiment of the present invention one;

Fig. 5 is a kind of base station equipment structure schematic diagram that the embodiment of the present invention two provides.

Embodiment

Inventor is realizing noticing in process of the present invention: in identical networking situation, there is the inherent characteristic that co-channel interference is TDD system between multiple cellular cell; The minizone co-channel interference of TD-LTE system can be divided into: closely co-channel interference and remote co-channel interference.Closely co-channel interference is: the interference of uplink/downlink that close two or more communities occur owing to using identical running time-frequency resource, comprising: interfered cell terminal to the uplink interference of base station, disturbed cell, base station, interfered cell to the descending interference of disturbed cell terminal; Because this co-channel interference occurs between the nearer community of standoff distance, therefore this co-channel interference is called closely co-channel interference (near-end interference).Remote co-channel interference is: the interference between base station, specifically refers to the conventional descending sub frame of remote interference base station and the DwPTS interference to disturbed base station UpPTS and regular upstream subframe; Now, due to interference base station and disturbed base station in distance general relatively far apart, therefore the co-channel interference between this base station is called remote co-channel interference (far-end interference).

Owing to not having the detection method of far-end interference in the prior art, therefore a kind of detection method and equipment of far-end interference are provided in the embodiment of the present invention, to realize the monitoring function to far-end interference, thus when judging to there is far-end interference, interference signal is further measured, and takes corresponding far-end interference solution.

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

Embodiment one

According to the analysis to the far-end interference origin cause of formation and feature, far end interfering signal be by certain distance outside the downstream signal of cluster base station be formed by stacking, and in cell cluster the distance of each community and this community there is some difference, therefore to arrive the propagation delay time of this community different for interference signal; Receiving the starting position of measuring-signal, in the DwPTS of far-end interference cell cluster Nei Ge community, all there is downstream signal, therefore can there is power more greatly and a more smooth segment signal power; And As time goes on, the downstream signal in cell cluster Nei Ge community DwPTS is sent, the interfered cell number arriving this community successively decreases, and the power of interference signal can decline gradually, forms hangover, is finally submerged in noise and adjacent area interference.Understand intuitively, the flex point of signal power, namely the position started of trailing is the position of the interfered cell DwPTS signal ended nearest apart from this community, the position that hangover terminates is the position apart from this community interfered cell DwPTS signal ended farthest, but the position that hangover terminates often is submerged in the interference of noise and adjacent cell, is not easy to observe.

Based on above-mentioned analysis, the embodiment of the present invention one provides a kind of detection method of far-end interference, and the application scenarios of the method can be TD-LTE system, namely in TD-LTE network, detects whether there is far-end interference; Wherein, the testing process of far-end interference is carried out in the base station equipment side of Target cell, and as shown in Figure 3, the detection method of this far-end interference comprises the following steps:

Step 301, base station equipment obtains the Received signal strength that far-end interference measures subframe.Wherein, this far-end interference measurement subframe comprises: special subframe GP, special subframe UpPTS and regular upstream subframe.

In the embodiment of the present invention, due to far-end interference mainly the conventional descending sub frame of interference base station and DwPTS to the interference of disturbed base station UpPTS and regular upstream subframe, therefore the measuring position of far-end interference should be GP, UpPTS and the regular upstream subframe of special subframe, and measuring object is the Received signal strength wherein not comprising this cell uplink channel; For measure the relevant sub-frame of far-end interference be far-end interference measure subframe.

Concrete, base station equipment obtains the Received signal strength that far-end interference measures subframe, comprising: base station equipment obtains the time-domain received signal in far-end interference measurement subframe

$e^{k_{\mathrm{aR}}}\left(n_{\mathrm{TS}}\right)k_{\mathrm{aR}}=1,\·,K_{\mathrm{aR}},n_{\mathrm{TS}}=0,\·,N_{\mathrm{TS}}-1;$

Wherein, K _aRrepresent the reception antenna number of the base station equipment of Target cell, N _tSrepresent Received signal strength sampled point number in protection time slot GP and uplink pilot time slot UpPTS section.

Step 302, base station equipment detects to received signal, and determines there is far-end interference or there is not far-end interference according to testing result.Wherein, base station equipment can power (envelope) value to received signal carry out far-end interference hangover detect, to judge whether there is far-end interference.

Concrete, base station equipment detects to received signal, and determine there is far-end interference or there is not far-end interference according to testing result, comprise: base station equipment, according to whether there is in the hangover of far-end interference and the UpPTS of Received signal strength whether sustainable existence far-end interference in the UpPTS of Received signal strength, determines there is far-end interference or there is not far-end interference.

Further, base station equipment is according to whether there is in the hangover of far-end interference and the UpPTS of Received signal strength whether sustainable existence far-end interference in the UpPTS of Received signal strength, determine there is far-end interference or there is not far-end interference, comprising: the hangover that whether there is far-end interference in the UpPTS that base station equipment judges Received signal strength; If there is the hangover of far-end interference, then there is far-end interference in the UpPTS of base station equipment determination Received signal strength; If there is no the hangover of far-end interference, then base station equipment judge Received signal strength UpPTS in whether sustainable existence far-end interference; If sustainable existence far-end interference, then there is far-end interference in the UpPTS of base station equipment determination Received signal strength and follow-up conventional subframe; If non-sustainable existence far-end interference, then base station equipment determines to there is not far-end interference.

Below in conjunction with the handling process shown in Fig. 4, in UpPTS base station equipment being judged to Received signal strength, whether have in UpPTS that the hangover of far-end interference and base station equipment judge Received signal strength whether sustainable existence far-end interference is further detailed.

Step 401, base station equipment calculates the instantaneous power of Received signal strength, namely does average treatment to the signal power on each antenna.

Concrete, base station equipment calculates the instantaneous power of Received signal strength, comprising: base station equipment is by the instantaneous power of following formulae discovery Received signal strength:

$p\left(n_{\mathrm{TS}}\right)=\frac{1}{K_{\mathrm{aR}}}\underset{k_{\mathrm{aR}}=1}{\overset{K_{\mathrm{aR}}}{\mathrm{\Σ}}}{e}^{k_{\mathrm{aR}}}\left(n_{\mathrm{TS}}\right)\·\mathrm{conj}\left(e^{k_{\mathrm{aR}}}\left(n_{\mathrm{TS}}\right)\right)$

Wherein, p (n _tS) represent the instantaneous power of Received signal strength.

In the embodiment of the present invention, base station equipment calculates the instantaneous power of Received signal strength and comprises further: base station equipment carries out low-pass filtering to received signal, and the instantaneous power of Received signal strength after compute low pass filtered.

Carry out to received signal in the process of low-pass filtering in base station equipment, in the embodiment of the present invention, when UpPTS or regular upstream subframe measure subframe as far-end interference, base station equipment can control not dispatch SRS in these subframes, PUCCH or PUSCH etc., if but PRACH (Packet Random Access Channel, Packet Random Access Channel) channel configuration is in these subframes, then the uncontrollable UE of base station equipment (subscriber equipment) does not initiate Stochastic accessing in these subframes, therefore before interferometry, need the process Received signal strength of interferometry subframe being carried out to low-pass filtering, to filter the resource location that PRACH takies.

Concrete, suppose that low pass filter time-domain pulse response is h _l, l=0,1 ... L _lF; Then base station equipment carries out low-pass filtering to received signal, comprising: base station equipment carries out low-pass filtering to received signal by following formula (namely filtering can be expressed as formula):

Wherein, represent the Received signal strength after low-pass filtering, K _aRrepresent the reception antenna number of base station equipment, N _tSrepresent Received signal strength sampled point number in GP and UpPTS section.

In the process of the instantaneous power of the Received signal strength after base station equipment compute low pass filtered, the instantaneous power of the Received signal strength after base station equipment compute low pass filtered, comprising: base station equipment is by the instantaneous power of the Received signal strength after following formulae discovery low-pass filtering:

$p\left(n_{\mathrm{TS}}\right)=\frac{1}{K_{\mathrm{aR}}}\underset{k_{\mathrm{aR}}=1}{\overset{K_{\mathrm{aR}}}{\mathrm{\Σ}}}{e}_{\mathrm{LF}}^{k_{\mathrm{aR}}}\left(n_{\mathrm{TS}}\right)\·\mathrm{conj}\left(e_{\mathrm{LF}}^{k_{\mathrm{aR}}}\left(n_{\mathrm{TS}}\right)\right)$

Wherein, p (n _tS) represent the instantaneous power of the Received signal strength after low-pass filtering.

Step 402, base station equipment instantaneous power to received signal carries out difference operation.

Concrete, base station equipment instantaneous power to received signal carries out difference operation, comprising: base station equipment carries out difference operation by following formula instantaneous power to received signal:

p _diff(n _TS)＝p(n _TS)/p(n _TS+Win _diff)

n _TS＝0，·，N _TS-Win _p-Win _diff-1

Wherein, p _diff(n _tS) represent difference power score value, Win _difffor power difference window is long.

In the embodiment of the present invention, base station equipment instantaneous power is to received signal carried out difference operation and is comprised further: the smoothing process of base station equipment instantaneous power to received signal, and carries out difference operation to the smooth power of the Received signal strength after smoothing processing.

In the process of the smoothing process of base station equipment instantaneous power to received signal, concrete, suppose Win _prepresent length of smooth window, the smooth value of mean value as signal transient power of each sample point is calculated in each window, smoothing windows is slided one by one according to sampled point, the then smoothing process of base station equipment instantaneous power to received signal, comprising: base station equipment is by following formula (namely the process of smoothing processing can be expressed as formula) the smoothing process of instantaneous power to received signal:

$p_{\mathrm{win}}\left(n_{\mathrm{TS}}\right)=\frac{1}{{\mathrm{Win}}_p}\underset{i=n_{\mathrm{TS}}}{\overset{n_{\mathrm{TS}}+{\mathrm{Win}}_p-1}{\mathrm{\Σ}}}p\left(i\right),n_{\mathrm{TS}}=0,\·,N_{\mathrm{TS}}-{\mathrm{Win}}_p-1$

Wherein, p _win(n _tS) represent the smooth power of the Received signal strength after smoothing processing.

Carry out in the process of difference operation in base station equipment to the smooth power of the Received signal strength after smoothing processing, concrete, the sampled point number that interval is certain, asks the ratio of smooth power linear value, namely carries out difference to smooth power; Suppose Win _difffor power difference window is long, then base station equipment carries out difference operation to the smooth power of the Received signal strength after smoothing processing, comprising: base station equipment carries out difference operation by following formula to the smooth power of the Received signal strength after smoothing processing:

p _diff(n _TS)＝p _win(n _TS)/p _win(n _TS+Win _diff)

n _TS＝0，·，N _TS-Win _p-Win _diff-1

Wherein, p _diff(n _tS) represent smooth power difference value.

It should be noted that base station equipment is the position at the peak value place according to difference value to the object that the signal power after level and smooth carries out difference, find received signal power to start the flex point declined, thus determine the starting position that signal power is trailed.

Step 403, the base station equipment search peak value of power (smooth power described above or instantaneous power) difference value and the position at peak value place.

Concrete, the peak value of base station equipment search difference power score value and the position at peak value place, comprising: base station equipment is by the following peak value of formula search difference power score value and the position at peak value place:

$[P_{\mathrm{diff}}^{\max },{\max }_{\mathrm{pos}}\text{]=max}\left\{\begin{array}{cc}{p}_{\mathrm{diff}}\left(n_{\mathrm{TS}}\right)& n_{\mathrm{TS}}=0,\·,N_{\mathrm{TS}}-{\mathrm{Win}}_p-{\mathrm{Win}}_{\mathrm{diff}}-1\end{array}\right\}$

Wherein, represent the peak value of difference power score value, max _posrepresent the position at the peak value place of difference power score value.

Step 404, the average of the lowest point flat of base station equipment rated output difference value.Wherein, base station equipment is by the average of the lowest point flat of the peak value of difference power score value and the position calculation difference power score value at peak value place.

Concrete, a part of sampled point of difference power score value the lowest point can be chosen, carry out the mean value of rated output difference value the lowest point part; And in order to the part that ensures to choose difference power score value the lowest point relatively flat and the sampled point that can choose is abundant, need the position max at the peak value place according to difference power score value _posthe position of getting window is adjusted, and I represents the position max at the peak value place according to difference power score value _posadjusted value after the position of getting window is adjusted; Based on this, base station equipment passes through the average of the lowest point flat of the peak value of difference power score value and the position calculation difference power score value at peak value place, comprising: base station equipment is by the average of following formulae discovery difference power score value the lowest point flat:

$P_{\mathrm{diff}}^{\mathrm{low}}=\frac{1}{{\mathrm{Win}}_{\mathrm{diff}}}\underset{i=I+1}{\overset{I+{\mathrm{Win}}_{\mathrm{diff}}}{\mathrm{\Σ}}}{p}_{\mathrm{diff}}\left(i\right)$

Wherein, represent the average of difference power score value the lowest point flat.

Step 405, base station equipment calculates the average of instantaneous power value end part.Base station equipment is by the average of the peak value of difference power score value and the position calculation instantaneous power value end part at peak value place.

Concrete, base station equipment passes through the average of the peak value of difference power score value and the position calculation instantaneous power value end part at peak value place, comprising: base station equipment is by the average of following formulae discovery instantaneous power value end part:

$P^{\mathrm{low}}=\frac{1}{\max ((N_{\mathrm{TS}}-({\max }_{\mathrm{pos}}+{\mathrm{Win}}_{\mathrm{diff}})),0.5*{\mathrm{Win}}_{\mathrm{diff}})}\underset{i=\min ({\max }_{\mathrm{pos}}+{\mathrm{Win}}_{\mathrm{diff}},N_{\mathrm{TS}}-0.5*{\mathrm{Win}}_{\mathrm{diff}})}{\overset{N_{\mathrm{TS}}-1}{\mathrm{\Σ}}}p\left(i\right)$

Wherein, P ^lowrepresent the average of instantaneous power value end part.

Step 406, base station equipment determines whether to there is far-end interference.Wherein, whether there is the hangover of far-end interference in the UpPTS that base station equipment can judge Received signal strength by the average of the lowest point flat of difference power score value; And base station equipment can judge Received signal strength by the average of instantaneous power value end part UpPTS in whether sustainable existence far-end interference.

Concrete, base station equipment judges by the average of the lowest point flat of difference power score value the hangover that whether there is far-end interference in the UpPTS of Received signal strength, comprising: the ratio between the peak value and the average of the lowest point flat of difference power score value:

$P_{\mathrm{diff}}^{\max }/P_{\mathrm{diff}}^{\mathrm{low}}\≥P_{\mathrm{diff}}^{\lim }$

Time, then there is the hangover of far-end interference in the UpPTS that base station equipment judges Received signal strength; Otherwise, in the UpPTS judging Received signal strength, there is not the hangover of far-end interference;

Wherein, represent the thresholding of setting.

Base station equipment to judge in the UpPTS of Received signal strength to comprise whether sustainable existence far-end interference: as the average P of instantaneous power value end part by the average of instantaneous power value end part ^lowmake an uproar P at the end being greater than (being far longer than) base station equipment _ntime, then base station equipment judge Received signal strength UpPTS in sustainable existence far-end interference, otherwise, non-sustainable existence far-end interference.

In the embodiment of the present invention, the ratio of base station equipment first between the peak value of rated output difference value and the average of the lowest point flat, and compare, for judging whether UpPTS exists far-end interference with the thresholding with setting; If ratio is more than or equal to the thresholding of setting, then think to there is far-end interference; If ratio is less than the thresholding of setting, then need the relative size judging to make an uproar in the average of instantaneous power value end part and the end of base station equipment side further; If make an uproar in the end that the average of instantaneous power value end part is obviously greater than base station equipment side, then think that far-end interference exists and lasts till regular upstream subframe; Otherwise there is not interference.

Concrete, when time, then judge that received signal power exists hangover in UpPTS section, namely there is far-end interference;

When and P ^low> > P _ntime, then judge received signal power sustainable existence far-end interference in UpPTS section, far-end interference hangover drops in follow-up regular upstream subframe;

When and P ^low≈ P _ntime, then judge to there is not far-end interference.

In sum, in the embodiment of the present invention, when arriving this community according to far end interfering signal, signal power can form the feature of hangover, base station equipment can by judging whether the power of the Received signal strength on specified measurement position exists hangover, detect far-end interference situation, thus the real time monitoring function realized far-end interference, once find to there is far-end interference, then can alarm in time, and further measure interference signal, and corresponding far-end interference solution is taked to provide beasurement base for network optimization personnel.

Embodiment two

Based on the inventive concept same with said method, additionally provide a kind of base station equipment in the embodiment of the present invention, as shown in Figure 5, this base station equipment comprises:

Acquisition module 11, measures the Received signal strength of subframe for obtaining far-end interference;

Processing module 12, for detecting described Received signal strength, and determines there is far-end interference or there is not far-end interference according to testing result.

Described acquisition module 11, specifically for obtaining the time-domain received signal in described far-end interference measurement subframe $e^{k_{\mathrm{aR}}}\left(n_{\mathrm{TS}}\right)k_{\mathrm{aR}}=1,\·,K_{\mathrm{aR}},n_{\mathrm{TS}}=0,\·,N_{\mathrm{TS}}-1;$

Wherein, K _aRrepresent the reception antenna number of described base station equipment, N _tSrepresent Received signal strength sampled point number in protection time slot GP and uplink pilot time slot UpPTS section.

Described far-end interference is measured subframe and is comprised: special subframe GP, special subframe UpPTS and regular upstream subframe.

Described processing module 12, specifically for according to whether sustainable existence far-end interference in the UpPTS of the hangover and described Received signal strength that whether there is far-end interference in the UpPTS of described Received signal strength, determines there is far-end interference or there is not far-end interference.

Described processing module 12 comprises:

Judge submodule 121, for judge described Received signal strength UpPTS in whether there is the hangover of far-end interference; And, when there is not the hangover of far-end interference, whether sustainable existence far-end interference in the UpPTS judging described Received signal strength;

, for when there is the hangover of far-end interference, in the UpPTS determining described Received signal strength, there is far-end interference in process submodule 122; And, when sustainable existence far-end interference, determine to there is far-end interference in the UpPTS of described Received signal strength and follow-up conventional subframe; When non-sustainable existence far-end interference, determine to there is not far-end interference.

Described judgement submodule 121, specifically for calculating the instantaneous power of described Received signal strength, and instantaneous power to received signal carries out difference operation;

The peak value of search difference power score value and the position at peak value place;

By the average of the lowest point flat of the peak value of described difference power score value and the position calculation difference power score value at peak value place;

The hangover of far-end interference whether is there is in the UpPTS being judged described Received signal strength by the average of the lowest point flat of difference power score value.

Described judgement submodule 121, specifically for calculating the instantaneous power of described Received signal strength, and instantaneous power to received signal carries out difference operation;

The peak value of search difference power score value and the position at peak value place;

By the average of the peak value of described difference power score value and the position calculation instantaneous power value end part at peak value place;

Whether sustainable existence far-end interference in the UpPTS being judged described Received signal strength by the average of instantaneous power value end part.

Described judgement submodule 121, is further used for the instantaneous power by following formulae discovery Received signal strength:

$p\left(n_{\mathrm{TS}}\right)=\frac{1}{K_{\mathrm{aR}}}\underset{k_{\mathrm{aR}}=1}{\overset{K_{\mathrm{aR}}}{\mathrm{\Σ}}}{e}^{k_{\mathrm{aR}}}\left(n_{\mathrm{TS}}\right)\·\mathrm{conj}\left(e^{k_{\mathrm{aR}}}\left(n_{\mathrm{TS}}\right)\right)$

Wherein, p (n _tS) represent the instantaneous power of Received signal strength.

Described judgement submodule 121, is further used for carrying out difference operation by following formula instantaneous power to received signal:

p _diff(n _TS)＝p(n _TS)/p(n _TS+Win _diff)

n _TS＝0，·，N _TS-Win _p-Win _diff-1

Wherein, p _diff(n _tS) represent difference power score value, Win _difffor power difference window is long.

Described judgement submodule 121, is further used for by the following peak value of formula search difference power score value and the position at peak value place:

$[P_{\mathrm{diff}}^{\max },{\max }_{\mathrm{pos}}\text{]=max}\left\{\begin{array}{cc}{p}_{\mathrm{diff}}\left(n_{\mathrm{TS}}\right)& n_{\mathrm{TS}}=0,\·,N_{\mathrm{TS}}-{\mathrm{Win}}_p-{\mathrm{Win}}_{\mathrm{diff}}-1\end{array}\right\}$

Wherein, represent the peak value of difference power score value, max _posrepresent the position at the peak value place of difference power score value.

Described judgement submodule 121, is further used for the average by following formulae discovery difference power score value the lowest point flat:

$P_{\mathrm{diff}}^{\mathrm{low}}=\frac{1}{{\mathrm{Win}}_{\mathrm{diff}}}\underset{i=I+1}{\overset{I+{\mathrm{Win}}_{\mathrm{diff}}}{\mathrm{\Σ}}}{p}_{\mathrm{diff}}\left(i\right)$

Wherein, represent the average of difference power score value the lowest point flat, I represents the position max at the peak value place according to difference power score value _posadjusted value after the position of getting window is adjusted.

Described judgement submodule 121, is further used for the ratio between the peak value and the average of the lowest point flat of described difference power score value:

$P_{\mathrm{diff}}^{\max }/P_{\mathrm{diff}}^{\mathrm{low}}\≥P_{\mathrm{diff}}^{\lim }$

Time, then there is the hangover of far-end interference in the UpPTS judging described Received signal strength; Otherwise, in the UpPTS judging described Received signal strength, there is not the hangover of far-end interference;

Wherein, represent the thresholding of setting.

Described judgement submodule 121, is further used for the average by following formulae discovery instantaneous power value end part:

$P^{\mathrm{low}}=\frac{1}{\max ((N_{\mathrm{TS}}-({\max }_{\mathrm{pos}}+{\mathrm{Win}}_{\mathrm{diff}})),0.5*{\mathrm{Win}}_{\mathrm{diff}})}\underset{i=\min ({\max }_{\mathrm{pos}}+{\mathrm{Win}}_{\mathrm{diff}},N_{\mathrm{TS}}-0.5*{\mathrm{Win}}_{\mathrm{diff}})}{\overset{N_{\mathrm{TS}}-1}{\mathrm{\Σ}}}p\left(i\right)$

Wherein, P ^lowrepresent the average of instantaneous power value end part.

Described judgement submodule 121, is further used for the average P when instantaneous power value end part ^lowmake an uproar P at the end being greater than base station equipment _ntime, then sustainable existence far-end interference in the UpPTS judging described Received signal strength, otherwise, non-sustainable existence far-end interference.

Described judgement submodule 121, is further used for carrying out low-pass filtering to described Received signal strength, and the instantaneous power of Received signal strength after compute low pass filtered.

Described judgement submodule 121, is further used for carrying out low-pass filtering by following formula to described Received signal strength:

Wherein, represent the Received signal strength after low-pass filtering, K _aRrepresent the reception antenna number of described base station equipment, N _tSrepresent Received signal strength sampled point number in GP and UpPTS section, low pass filter time-domain pulse response is h _l, l=0,1 ... L _lF.

Described judgement submodule 121, is further used for the instantaneous power of the Received signal strength after by following formulae discovery low-pass filtering:

$p\left(n_{\mathrm{TS}}\right)=\frac{1}{K_{\mathrm{aR}}}\underset{k_{\mathrm{aR}}=1}{\overset{K_{\mathrm{aR}}}{\mathrm{\Σ}}}{e}^{k_{\mathrm{aR}}}\left(n_{\mathrm{TS}}\right)\·\mathrm{conj}\left(e^{k_{\mathrm{aR}}}\left(n_{\mathrm{TS}}\right)\right)$

Wherein, p (n _tS) represent the instantaneous power of the Received signal strength after low-pass filtering.

Described judgement submodule 121, is further used for the smoothing process of instantaneous power to received signal, and carries out difference operation to the smooth power of the Received signal strength after smoothing processing.

Described judgement submodule 121, is further used for by the smoothing process of following formula instantaneous power to received signal:

$p_{\mathrm{win}}\left(n_{\mathrm{TS}}\right)=\frac{1}{{\mathrm{Win}}_p}\underset{i=n_{\mathrm{TS}}}{\overset{n_{\mathrm{TS}}+{\mathrm{Win}}_p-1}{\mathrm{\Σ}}}p\left(i\right),n_{\mathrm{TS}}=0,\·,N_{\mathrm{TS}}-{\mathrm{Win}}_p-1$

Wherein, p _win(n _tS) represent the smooth power of the Received signal strength after smoothing processing, Win _prepresent length of smooth window.

Described judgement submodule 121, is further used for carrying out difference operation by following formula to the smooth power of the Received signal strength after smoothing processing:

p _diff(n _TS)＝p _win(n _TS)/p _win(n _TS+Win _diff)

n _TS＝0，·，N _TS-Win _p-Win _diff-1

Wherein, p _diff(n _tS) represent smooth power difference value, Win _difffor power difference window is long.

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

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 required 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, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform 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 carry out being 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 being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.

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

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

Claims (26)

1. a detection method for far-end interference, is characterized in that, comprising:

Base station equipment obtains the Received signal strength that far-end interference measures subframe;

Described base station equipment detects described Received signal strength, and determines there is far-end interference or there is not far-end interference according to testing result;

Wherein, described base station equipment detects described Received signal strength, and determines there is far-end interference or there is not far-end interference according to testing result, comprising:

Described base station equipment, according to whether sustainable existence far-end interference in the UpPTS of the hangover and described Received signal strength that whether there is far-end interference in the UpPTS of described Received signal strength, determines there is far-end interference or there is not far-end interference;

Described base station equipment is according to whether sustainable existence far-end interference in the UpPTS of the hangover and described Received signal strength that whether there is far-end interference in the UpPTS of described Received signal strength, determine there is far-end interference or there is not far-end interference, comprising: the hangover that whether there is far-end interference in the UpPTS that described base station equipment judges described Received signal strength;

If there is the hangover of far-end interference, then there is far-end interference in the UpPTS that described base station equipment determines described Received signal strength;

If there is no the hangover of far-end interference, then described base station equipment judge described Received signal strength UpPTS in whether sustainable existence far-end interference;

If sustainable existence far-end interference, then described base station equipment determines to there is far-end interference in the UpPTS of described Received signal strength and follow-up conventional subframe;

If non-sustainable existence far-end interference, then described base station equipment determines to there is not far-end interference;

Whether there is the hangover of far-end interference in the UpPTS that described base station equipment judges described Received signal strength, comprise further:

Described base station equipment calculates the instantaneous power of described Received signal strength, and instantaneous power to received signal carries out difference operation;

The described peak value of base station equipment search difference power score value and the position at peak value place;

Described base station equipment is by the average of the lowest point flat of the peak value of described difference power score value and the position calculation difference power score value at peak value place;

Described base station equipment judges by the average of the lowest point flat of difference power score value the hangover that whether there is far-end interference in the UpPTS of described Received signal strength;

Whether sustainable existence far-end interference in the UpPTS that described base station equipment judges described Received signal strength, comprises further:

Described base station equipment calculates the instantaneous power of described Received signal strength, and instantaneous power to received signal carries out difference operation;

The described peak value of base station equipment search difference power score value and the position at peak value place;

Described base station equipment is by the average of the peak value of described difference power score value and the position calculation instantaneous power value end part at peak value place;

Described base station equipment to judge in the UpPTS of described Received signal strength whether sustainable existence far-end interference by the average of instantaneous power value end part.

2. the method for claim 1, is characterized in that, described base station equipment obtains the Received signal strength that far-end interference measures subframe, comprising:

Described base station equipment obtains the time-domain received signal in described far-end interference measurement subframe

Wherein, K _aRrepresent the reception antenna number of described base station equipment, N _tSrepresent Received signal strength sampled point number in protection time slot GP and uplink pilot time slot UpPTS section.

3. method as claimed in claim 1 or 2, is characterized in that, described far-end interference is measured subframe and comprised: special subframe GP, special subframe UpPTS and regular upstream subframe.

4. the method for claim 1, is characterized in that, described base station equipment calculates the instantaneous power of described Received signal strength, comprising:

Described base station equipment is by the instantaneous power of Received signal strength described in following formulae discovery:

Wherein, p (n _tS) represent the instantaneous power of Received signal strength, k _aRrepresent the reception antenna number of described base station equipment, n _tSrepresent Received signal strength sampled point number in protection time slot GP and uplink pilot time slot UpPTS section.

5. method as claimed in claim 4, it is characterized in that, described base station equipment instantaneous power to received signal carries out difference operation, comprising:

Described base station equipment carries out difference operation by following formula instantaneous power to received signal:

p _diff(n _TS)＝p(n _TS)/p(n _TS+Win _diff)

n _TS＝0,…,N _TS-Win _p-Win _diff-1

Wherein, p _diff(n _tS) represent difference power score value, Win _difffor power difference window is long, Win _prepresent length of smooth window.

6. method as claimed in claim 5, is characterized in that, the described peak value of base station equipment search difference power score value and the position at peak value place, comprising:

Described base station equipment is by the following peak value of formula search difference power score value and the position at peak value place:

Wherein, represent the peak value of difference power score value, max _posrepresent the position at the peak value place of difference power score value.

7. method as claimed in claim 6, is characterized in that, described base station equipment, by the average of the lowest point flat of the peak value of described difference power score value and the position calculation difference power score value at peak value place, comprising:

Described base station equipment is by the average of the lowest point flat of following formulae discovery difference power score value:

Wherein, represent the average of difference power score value the lowest point flat, I represents the position max at the peak value place according to difference power score value _posadjusted value after the position of getting window is adjusted.

8. method as claimed in claim 7, it is characterized in that, described base station equipment judges by the average of the lowest point flat of difference power score value the hangover that whether there is far-end interference in the UpPTS of described Received signal strength, comprising:

Ratio between the peak value and the average of the lowest point flat of described difference power score value:

Time, then there is the hangover of far-end interference in the UpPTS that described base station equipment judges described Received signal strength; Otherwise, in the UpPTS judging described Received signal strength, there is not the hangover of far-end interference;

Wherein, represent the thresholding of setting.

9. method as claimed in claim 6, is characterized in that, described base station equipment, by the average of the peak value of described difference power score value and the position calculation instantaneous power value end part at peak value place, comprising:

Described base station equipment is by the average of following formulae discovery instantaneous power value end part:

Wherein, P ^lowrepresent the average of instantaneous power value end part.

10. method as claimed in claim 9, is characterized in that, described base station equipment to judge in the UpPTS of described Received signal strength to comprise whether sustainable existence far-end interference by the average of instantaneous power value end part:

As the average P of instantaneous power value end part ^lowmake an uproar P at the end being greater than base station equipment _ntime, then described base station equipment judge described Received signal strength UpPTS in sustainable existence far-end interference, otherwise, non-sustainable existence far-end interference.

11. the method for claim 1, is characterized in that, described base station equipment calculates the instantaneous power of described Received signal strength, comprising:

Described base station equipment carries out low-pass filtering to described Received signal strength, and the instantaneous power of Received signal strength after compute low pass filtered.

12. methods as claimed in claim 11, it is characterized in that, described base station equipment carries out low-pass filtering to described Received signal strength, comprising:

Described base station equipment carries out low-pass filtering by following formula to described Received signal strength:

Wherein, represent the Received signal strength after low-pass filtering, K _aRrepresent the reception antenna number of described base station equipment, N _tSrepresent Received signal strength sampled point number in GP and UpPTS section, low pass filter time-domain pulse response is h _l, l=0,1 ... L _lF.

13. methods as claimed in claim 12, it is characterized in that, the instantaneous power of the Received signal strength after described base station equipment compute low pass filtered, comprising:

Described base station equipment is by the instantaneous power of the Received signal strength after following formulae discovery low-pass filtering:

Wherein, p (n _tS) represent the instantaneous power of the Received signal strength after low-pass filtering.

14. the method for claim 1, is characterized in that, described base station equipment instantaneous power to received signal carries out difference operation, comprising:

The smoothing process of described base station equipment instantaneous power to received signal, and difference operation is carried out to the smooth power of the Received signal strength after smoothing processing.

15. methods as claimed in claim 14, it is characterized in that, the smoothing process of described base station equipment instantaneous power to received signal, comprising:

Described base station equipment is by the smoothing process of following formula instantaneous power to received signal:

Wherein, p _win(nTS) smooth power of the Received signal strength after smoothing processing is represented, Win _prepresent length of smooth window.

16. methods as claimed in claim 15, it is characterized in that, described base station equipment carries out difference operation to the smooth power of the Received signal strength after smoothing processing, comprising:

Described base station equipment carries out difference operation by following formula to the smooth power of the Received signal strength after smoothing processing:

p _diff(n _TS)＝p _win(n _TS)/p _win(n _TS+Win _diff)

n _TS＝0,…,N _TS-Win _p-Win _diff-1

Wherein, p _diff(n _tS) represent smooth power difference value, Win _difffor power difference window is long.

17. 1 kinds of base station equipments, is characterized in that, comprising:

Acquisition module, measures the Received signal strength of subframe for obtaining far-end interference;

Processing module, for detecting described Received signal strength, and determines there is far-end interference or there is not far-end interference according to testing result;

Described processing module, specifically for according to whether sustainable existence far-end interference in the UpPTS of the hangover and described Received signal strength that whether there is far-end interference in the UpPTS of described Received signal strength, determines there is far-end interference or there is not far-end interference;

Described processing module comprises:

Judge submodule, for judge described Received signal strength UpPTS in whether there is the hangover of far-end interference; And, when there is not the hangover of far-end interference, whether sustainable existence far-end interference in the UpPTS judging described Received signal strength;

, for when there is the hangover of far-end interference, in the UpPTS determining described Received signal strength, there is far-end interference in process submodule; And, when sustainable existence far-end interference, determine to there is far-end interference in the UpPTS of described Received signal strength and follow-up conventional subframe; When non-sustainable existence far-end interference, determine to there is not far-end interference;

Described judgement submodule, specifically for calculating the instantaneous power of described Received signal strength, and instantaneous power to received signal carries out difference operation; The peak value of search difference power score value and the position at peak value place; By the average of the lowest point flat of the peak value of described difference power score value and the position calculation difference power score value at peak value place; The hangover of far-end interference whether is there is in the UpPTS being judged described Received signal strength by the average of the lowest point flat of difference power score value;

Described judgement submodule, specifically for calculating the instantaneous power of described Received signal strength, and instantaneous power to received signal carries out difference operation; The peak value of search difference power score value and the position at peak value place; By the average of the peak value of described difference power score value and the position calculation instantaneous power value end part at peak value place; Whether sustainable existence far-end interference in the UpPTS being judged described Received signal strength by the average of instantaneous power value end part.

18. base station equipments as claimed in claim 17, is characterized in that,

Described acquisition module, specifically for obtaining the time-domain received signal in described far-end interference measurement subframe

Wherein, K _aRrepresent the reception antenna number of described base station equipment, N _tSrepresent Received signal strength sampled point number in protection time slot GP and uplink pilot time slot UpPTS section.

19. base station equipments as described in claim 17 or 18, is characterized in that, described far-end interference is measured subframe and comprised: special subframe GP, special subframe UpPTS and regular upstream subframe.

20. base station equipments as claimed in claim 17, is characterized in that,

Described judgement submodule, is further used for the instantaneous power by following formulae discovery Received signal strength:

Wherein, p (n _tS) represent the instantaneous power of Received signal strength, k _aRrepresent the reception antenna number of described base station equipment, n _tSrepresent Received signal strength sampled point number in protection time slot GP and uplink pilot time slot UpPTS section.

21. base station equipments as claimed in claim 20, is characterized in that,

Described judgement submodule, is further used for carrying out difference operation by following formula instantaneous power to received signal:

p _diff(nTS)＝p(n _TS)/p(n _TS+Win _diff)

n _TS＝0,…,N _TS-Win _p-Win _diff-1

Wherein, p _diff(n _tS) represent difference power score value, Win _difffor power difference window is long, Win _prepresent length of smooth window.

22. base station equipments as claimed in claim 21, is characterized in that,

Described judgement submodule, is further used for by the following peak value of formula search difference power score value and the position at peak value place:

Wherein, represent the peak value of difference power score value, max _posrepresent the position at the peak value place of difference power score value.

23. base station equipments as claimed in claim 22, is characterized in that,

Described judgement submodule, is further used for the average by following formulae discovery difference power score value the lowest point flat:

Wherein, represent the average of difference power score value the lowest point flat, I represents the position max at the peak value place according to difference power score value _posadjusted value after the position of getting window is adjusted.

24. base station equipments as claimed in claim 23, is characterized in that,

Described judgement submodule, is further used for the ratio between the peak value and the average of the lowest point flat of described difference power score value:

Time, then there is the hangover of far-end interference in the UpPTS judging described Received signal strength; Otherwise, in the UpPTS judging described Received signal strength, there is not the hangover of far-end interference;

Wherein, represent the thresholding of setting.

25. base station equipments as claimed in claim 22, is characterized in that,

Described judgement submodule, is further used for the average by following formulae discovery instantaneous power value end part:

Wherein, P ^lowrepresent the average of instantaneous power value end part.

26. base station equipments as claimed in claim 25, is characterized in that,

Described judgement submodule, is further used for the average P when instantaneous power value end part ^lowmake an uproar P at the end being greater than base station equipment _ntime, then sustainable existence far-end interference in the UpPTS judging described Received signal strength, otherwise, non-sustainable existence far-end interference.