CN103929772A - Reference signal receiving power measuring method and device, reselection method and user terminal - Google Patents

Abstract

The invention provides a reference signal receiving power measuring method and device, a reselection method and a user experience. The measuring method comprises finding reference signals and corresponding reference signal symbols from received signals; obtaining frequency domain signals corresponding to the reference signal symbols from the signals; obtaining channels of the reference signals corresponding to the reference signal symbols based on the domain signals; forming correlation factors by combining with the relevance of the reference signals corresponding to the reference signal symbols identical in sub-carrier positions according to the channels; obtaining reference signal receiving power based on the correlation factors. The reselection method comprises the measuring method. The user experience comprises the measuring device. By means of the measuring method and device, the reselection method and the user experience, the reference signal receiving power (RSRP) measuring accuracy is improved.

Description

The method of reference signal received power measurement method and device, gravity treatment, user side

Technical field

The present invention relates to communication technical field, particularly a kind of method of reference signal received power measurement method and device, gravity treatment, user side.

Background technology

In the mobile communication system of Long Term Evolution (LTE, Long Term Evolution), cell reselection is one of most important task in idle pulley.By cell reselection, user side (User Experience, UE) can be resident in the community of high-quality.

Specifically, when UE resident to after some communities of LTE system, can constantly to the signal quality of current area and adjacent cells, measure, when finding that the signal quality of other communities meets requiring of regulation, UE end can be by cell reselection the community from current area gravity treatment to better quality.It should be noted that, in LTE system, described measurement is to complete by measuring reference signals received power (Reference Signal Receiving Power, RSRP).

In the Chinese patent application that is CN102457469A at publication number, disclose a kind of RSRP method of measurement, with reference to figure 1, shown the schematic diagram of RSRP method of measurement in described Chinese patent.Described method comprises: the signal receiving is carried out to frequency shift, upper half belt or second band are become centered by DC frequency; By the signal extraction of reception, be the width of n2m sample, n is the fiducial mark at interval in the signal receiving; Sample is divided into n sample vector, and each sample vector has the length of 2m, n the sample vector that stack is described; And the signal of stack is carried out to FFT computing, to obtain the fiducial mark carrier wave of continuum from the signal being sent by a base station, described fiducial mark carrier wave is applicable to determine the described reference signal received power of the signal being sent by described base station.The disclosed RSRP method of measurement of described Chinese patent application is comparatively simple.

Yet for cell reselection, the precision that RSRP measures is extremely important.Because if it is not accurate enough that RSRP measures, can make UE can not reside in the best community of signal quality, thereby affect user's experience.The precision that how to improve RSRP measurement is one of those skilled in the art's technical problem urgently to be resolved hurrily.

Summary of the invention

The problem to be solved in the present invention is to provide a kind of reference signal received power measurement method that can improve RSRP certainty of measurement and device, the method for gravity treatment, user side.

In order to address the above problem, the invention provides a kind of reference signal received power measurement method, comprising: from the signal receiving, find out reference signal and corresponding reference signal symbol; From described signal, obtain the frequency-region signal corresponding with described reference signal symbol; Based on described frequency-region signal, obtain the channel of the reference signal corresponding with described reference signal symbol; According to described channel, the correlation of the reference signal that reference signal symbol that zygote carrier position is identical is corresponding, forms correlation factor; Based on described correlation factor, obtain Reference Signal Received Power.

Alternatively, also comprise: according to described channel, the reference signal that reference signal symbol that zygote carrier position is identical is corresponding and the irrelevance of interference signal, form the uncorrelated factor; Based on the described uncorrelated factor, obtain interference signal received power.

Alternatively, also comprise: in conjunction with the relation between described Reference Signal Received Power and interference signal received power, described Reference Signal Received Power is proofreaied and correct, to obtain, proofreaied and correct rear Reference Signal Received Power.

Alternatively, after acquisition correction, the step of Reference Signal Received Power comprises: the relative size of more described interference signal received power and described Reference Signal Received Power; When described interference signal received power is less than the described Reference Signal Received Power of the first preset multiple, described Reference Signal Received Power is proofreaied and correct, to obtain, proofread and correct rear Reference Signal Received Power.

Alternatively, described Reference Signal Received Power is proofreaied and correct, after proofreading and correct, the step of Reference Signal Received Power comprises: if described interference signal received power is greater than the described Reference Signal Received Power of the second preset multiple and is less than the described Reference Signal Received Power of the first preset multiple, after described correction, reference signal power is the poor of described Reference Signal Received Power and ten sixth interference signal received powers;

If described interference signal received power is greater than described Reference Signal Received Power and is less than the described Reference Signal Received Power of the second preset multiple, after described correction, reference signal power is the poor of interference signal received power described in described Reference Signal Received Power and 1/8th; If interference signal received power is less than described Reference Signal Received Power, after described correction, reference signal power is the poor of interference signal received power described in described Reference Signal Received Power and 1/4th.

Alternatively, described based on described frequency-region signal, the step that obtains the channel corresponding with reference signal symbol comprises: the conjugate multiplication based on frequency-region signal and described reference signal, obtains described channel.

Alternatively, according to described channel, the reference signal correlation of the reference signal symbol that zygote carrier position is identical, the step that forms correlation factor comprises: the channel to the identical reference signal symbol of sub-carrier positions carries out conjugate multiplication, usings the absolute value of conjugate multiplication real part as correlation factor.

Alternatively, according to described channel, the reference signal of reference signal symbol that zygote carrier position is identical and the being not related to property of interference signal, the step that forms the uncorrelated factor comprises: the channel to the identical reference signal symbol of sub-carrier positions carries out conjugate multiplication, usings the absolute value of imaginary part of conjugate multiplication as the uncorrelated factor.

Alternatively, the described step that obtains Reference Signal Received Power based on described correlation factor comprises: by described correlation factor and average obtain described Reference Signal Received Power.

Correspondingly, the invention provides a kind of method of gravity treatment, comprising: the measurement of Reference Signal Received Power is carried out in current area and adjacent cell, the reference signal received power measurement method described in the measurement of described Reference Signal Received Power; When the Reference Signal Received Power that measures adjacent cell is greater than the Reference Signal Received Power of current area, switches to adjacent cell and carry out resident.

Correspondingly, the present invention also provides a kind of Reference Signal Received Power measurement mechanism, comprising: reference signal unit, is applicable to find out reference signal and corresponding reference signal symbol; The frequency-region signal unit being connected with described reference signal unit, is applicable to obtain the corresponding frequency-region signal of reference signal symbol of finding out with reference signal unit; With the Channel Elements that described frequency-region signal unit, described reference signal unit are connected, be applicable to the frequency-region signal based on the acquisition of described frequency-region signal unit, obtain the channel of the reference signal corresponding with described reference signal symbol; The correlation factor unit being connected with described Channel Elements, described reference signal unit, be applicable to the channel obtaining according to described Channel Elements, correlation between reference signal corresponding to reference signal symbol that the sub-carrier positions found out in conjunction with reference signal unit is identical, forms correlation factor; With the Reference Signal Received Power unit that described correlation factor unit is connected, be applicable to the correlation factor based on the formation of described correlation factor unit, obtain Reference Signal Received Power.

Alternatively, also comprise: the uncorrelated factor unit being connected with described Channel Elements, reference signal unit, be applicable to the channel obtaining according to described Channel Elements, the reference signal that reference signal symbol that the sub-carrier positions found out in conjunction with reference signal unit is identical is corresponding and the irrelevance between interference signal, form the uncorrelated factor; The interference signal received power unit being connected with described uncorrelated factor unit, is applicable to obtain interference signal received power based on the described uncorrelated factor.

Alternatively, also comprise: the correcting unit being connected with described Reference Signal Received Power unit, described interference signal received power unit, relativeness between the Reference Signal Received Power that is applicable to obtain in conjunction with Reference Signal Received Power unit, the interference signal received power that described interference signal received power unit obtains, described Reference Signal Received Power is proofreaied and correct, to obtain, proofreaied and correct rear Reference Signal Received Power.

Alternatively, described correcting unit comprises: the comparator being connected with described Reference Signal Received Power unit, described interference signal received power unit, be applicable to more described interference signal received power and described Reference Signal Received Power relative size, when described interference signal received power is less than the described Reference Signal Received Power of the first preset multiple, form triggering signal; With the adjuster that described Reference Signal Received Power unit, described comparator are connected, be applicable to, when receiving the triggering signal that described adjuster sends, described Reference Signal Received Power be proofreaied and correct, with obtain proofread and correct after Reference Signal Received Power.

Alternatively, described adjuster is also connected with described interference signal received power unit; Described comparator is applicable to, when described interference signal received power is greater than the described Reference Signal Received Power of the second preset multiple and is less than the described Reference Signal Received Power of the first preset multiple, send the first triggering signal; Described adjuster is applicable to when receiving described the first triggering signal, and poor according to described Reference Signal Received Power and ten sixth interference signal received powers obtains reference signal power after described correction; Described comparator is applicable to, when described interference signal received power is greater than described Reference Signal Received Power and is less than the described Reference Signal Received Power of the second preset multiple, send the second triggering signal; Described adjuster is applicable to when receiving described the second triggering signal, and poor according to interference signal received power described in described Reference Signal Received Power and 1/8th obtains reference signal power after described correction; Described comparator is applicable to, when described interference signal received power is less than described Reference Signal Received Power, send the 3rd triggering signal; Described adjuster is applicable to when receiving described the 3rd triggering signal, according to described reference signal power, is the poor of interference signal received power described in described Reference Signal Received Power and 1/4th, obtains reference signal power after described correction.

Alternatively, described Channel Elements, is applicable to the mould of the conjugate multiplication of the reference signal that the frequency-region signal that obtains according to described frequency-region signal unit and described reference signal unit find out, and obtains described channel.

Alternatively, described correlation factor unit, the channel that is applicable to the reference signal symbol that sub-carrier positions that Channel Elements is obtained is identical carries out conjugate multiplication, usings the absolute value of conjugate multiplication real part as correlation factor.

Alternatively, described uncorrelated factor unit, the channel that is applicable to the reference signal symbol that sub-carrier positions that Channel Elements is obtained is identical carries out conjugate multiplication, usings the absolute value of imaginary part of conjugate multiplication as the uncorrelated factor.

Alternatively, described Reference Signal Received Power unit, be applicable to the correlation factor that forms according to described correlation factor unit and average, obtain described Reference Signal Received Power.

Alternatively, a kind of user side, comprising: the measurement mechanism of described reference signal power.

Alternatively, described user side is mobile phone, and described measurement mechanism is arranged in described mobile phone.

Compared with prior art, technical scheme of the present invention has the following advantages:

Due to also uncorrelated between reference signal and interference signal, and it is relevant between reference signal, therefore, even there is interference signal in corresponding the listing of reference signal symbol, according to described channel, the correlation of the reference signal that reference signal symbol that zygote carrier position is identical is corresponding, while forming correlation factor, what extract is the corresponding part of reference signal, therefore, reduced interference signal impact, improved the accuracy that RSRP measures.

Accompanying drawing explanation

Fig. 1 is the schematic flow sheet of a kind of RSRP of prior art;

Fig. 2 is two-port reference signal resource mapping graph;

Fig. 3 is the schematic flow sheet of RSRP method of measurement the first embodiment of the present invention;

Fig. 4 is the schematic flow sheet of RSRP method of measurement the second embodiment of the present invention;

Fig. 5 is the schematic flow sheet of the S8 of step shown in Fig. 4 mono-embodiment;

Fig. 6 is the schematic flow sheet of the S82 of step shown in Fig. 5 mono-embodiment;

Fig. 7 is the schematic diagram of RSRP measurement mechanism the first embodiment of the present invention;

Fig. 8 is the schematic diagram of RSRP measurement mechanism the second embodiment of the present invention.

Embodiment

For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.

Set forth in the following description a lot of details so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here, implement, so the present invention has not been subject to the restriction of following public specific embodiment.

In order to solve the problems of the prior art, the present inventor has carried out large quantity research to reference signal received power measurement method.With reference to figure 2, show two-port reference signal resource mapping graph.The schematic diagram of the reference signal of herein sending for community, it should be noted that, Shi Yi community has two antenna ports (port 0 and port one) and describes for example herein, but can not using this as restriction, it can also be the community of an antenna port or four antenna ports, having varying number antenna port community, to carry out the method for RSRP calculating the same, can correspondingly be out of shape, revises and replace.

In Fig. 2, each blockage represents a resource particle (Resource Element, RE), and in port 0 and port one, horizontal direction is the time, and vertical direction is frequency.R ₀for the first reference signal S1 that port 0 sends, R ₁the the second reference signal S2 sending for port one, in order to prevent the reference signal that same community different port sends, obscure, the position of sending the first reference signal S1 at port 0 arranges non-emissive signal S0 in being in port one, the position of similarly, sending the second reference signal S2 at port one arranges non-emissive signal S0 in being in port 0.

No matter in the reference signal sent of port 0 or port one, Resource Block (Resource Block, a RB, conventionally in LTE system, reference signal comprises 6 RB, in Fig. 2, take RB0 as example) on frequency domain, there are 12 subcarriers, in time domain, there are 14 symbols, and reference signal (R ₀or R ₁) position at place differs 6 subcarriers on frequency domain, differs 4 symbols in time domain.Particularly, one has 4 reference signal symbols is applicable to measure, and in order to express easily, can be 0,1 by four sign flags.2，3。

Particularly, RSRP test is the linear averaging power to the reference signal in certain frequency band (being several Resource Block).Therefore, RSRP can be expressed as following formula:

${\mathrm{RSRP}}_i=\frac{1}{2N*L}{\mathrm{\Σ}}_{l=1}^L{\mathrm{\Σ}}_{k=1}^{2N}|H_i(k,l){|}^2$ Formula (1)

Wherein, H _i(k, l) is that the corresponding reference signal of i root reception antenna is located the channel of estimating, H at (k, l) on antenna port 0 _ithe mould of (k, l) square be the power of reference signal; (k, l) represents l symbol, the resource particle (Resource Element, RE) that a k subcarrier is corresponding; N, L represent respectively the sequence number of Resource Block and the symbolic number of OFDM (Orthogonal Frequency-Division Multiplexing, OFDM).

Take port 0 as example, and that formula (1) represents is the R of all positions in bitmap 2 ₀the power of corresponding channel and average.

But, when inventor finds that or co-channel interference lower in signal to noise ratio is larger, adopt the method for formula (1) to carry out RSRP measure error larger.This is to have because UE, when receiving the reference signal of sending Target cell to be measured, also can receive the homogenous frequency signal that send the interfered cell of various ce ll ID.There is the interfered cell of various ce ll ID different with the position of the reference signal of Target cell in mapping graph, therefore, in Fig. 2, the position such as F (under perfect condition, there is not reference signal this position) there will be the interference signal that reference signal produces of being sent by interfered cell.While adopting formula (1) to carry out RSRP calculating, described interference signal also can be applied, and the RSRP that UE is measured produces interference.Therefore, in order to improve the certainty of measurement of RSRP, except needs are removed white noise, also need the error that interfered cell is brought to estimate, so that the described error estimating is removed.

Yet, very large if inventor's discovery employing is similar to the method calculating interfered cell power amount of calculation of formula (1).

In order to address the above problem, the feature of inventor based on reference signal is pseudo-random signal in LTE system, provides a kind of reference signal received power measurement method.With reference to figure 3, show the schematic flow sheet of reference signal received power measurement method the first embodiment of the present invention.Described method of measurement roughly comprises the following steps:

Execution step S1 finds out reference signal and corresponding reference signal symbol from the signal receiving.

Specifically, the resident some communities to LTE system of UE (being the current area at UE place) afterwards, can receive the adjacent cell (being Target cell) of current area to the signal of UE transmitting.At UE, receive after described signal, can described signal be analyzed and be extracted, find out the reference signal comprising in described signal, to carry out RSRP measurement, and then judge whether the signal quality of described Target cell meets the requirement of cell reselection.

Please continue to refer to Fig. 2, illustrated the mapping graph of a kind of template of reference signal.This sentences adjacent cell is that two antennas are that example describes, but the present invention is not restricted this.

As shown in Figure 2, in LTE system, reference signal (S1 or S2) differs 4 reference signal symbols in time domain.Particularly, reference signal is positioned at 4 different listing in described template, and one have 4 reference signal symbols and be applicable to measure, in order to express easily, can be 0,1,2,3 by four sign flags.UE from receive find out described reference signal signal after, also need described reference signal to process, extract reference signal symbol.

It should be noted that, from signal, find out reference signal, the method for finding out reference symbol from described reference signal is same as the prior art, does not repeat them here.

Execution step S2 obtains the frequency-region signal corresponding with described reference signal symbol from described signal.As shown in Figure 2, in LTE system, reference symbol differs 6 subcarriers on frequency domain direction.After UE obtains reference signal symbol in time domain direction, obtain the frequency-region signal corresponding with described reference signal symbol, with Y _icorresponding frequency-region signal when l symbol, k the subcarrier on frequency domain in the time domain that (k, l) expression i (i is 0 or 1) root antenna sends received by UE.

It should be noted that described frequency-region signal Y _ithe reference signal of sending except receiving antenna in (k, l), also comprises white noise signal, and the interference signal of co-frequency cell generation.

Therefore, without loss of generality, i reception antenna receives signal and can be expressed as follows:

$Y_i(k,l)=\underset{n=0}{\overset{\mathrm{Ncell}}{\mathrm{\Σ}}}{H}_i^n(k,l)S_i(k,l)+N_i(k,l)=H_i^0(k,l)S_i^0(k,l)+\underset{n=1}{\overset{\mathrm{Ncell}}{\mathrm{\Σ}}}{H}_i^n(k,l)S_i(k,l)+N_i(k,l)$

K=1 ..., 2N; L=1 ..., L formula (2)

Wherein, H _i ⁰(k, l), S _i ⁰(k, l) is respectively channel and the reference signal that UE estimates.Same, H _i ⁿ(k, l), S _i ⁿ(k, l) is respectively interfered cell n=1 ..., N _cellchannel and reference signal in RE (k, l) corresponding position, wherein N _cellnumber for interfered cell.Described N _i(k, l) is white noise.

Execution step S3, based on described frequency-region signal, obtains the channel of the reference signal corresponding with described reference signal symbol.

By formula (2), be not difficult to find out to there is with Target cell the reference signal S that send the interfered cell of various ce ll ID _i ⁿ(k, l) and S _i ⁰(k, l) is different signals, and both are uncorrelated, is general data-signal.That is to say, actual for Target cell, the described reference signal S that send interfered cell _i ⁿ(k, l) is similar with white noise.Therefore, described frequency domain symbol can also be expressed as:

$Y_i(k,l)=H_i^0(k,l)S_i^0(k,l)+{\stackrel{\‾}{N}}_1(k,l),k=1,......,2N;1=1,......,L$ Formula (3)

Wherein, be equivalent to the combination of the reference signal of white noise and interfered cell.

In actual communication process, UE receives described frequency-region signal Y _i(k, l) afterwards, in conjunction with formula (3), can obtain channel by following relational expression:

${\tilde{H}}_i^0(k,l)=Y_i(k,l)S_i^0{(k,l)}^{*}=H_i^0(k,l){\left|S_i^0(k,l)\right|}^2+\stackrel{\‾}{N_1^{\mathrm{eff}}}(k,l)$ Formula (4)

That is to say, can be based on frequency-region signal Y _i(k, l) and described reference signal S _i ⁰the conjugate multiplication of (k, l), obtains described channel.

Wherein, $\stackrel{\‾}{N_1^{\mathrm{eff}}}(k,l)={\stackrel{\‾}{N}}_i(k,l)S_i^0(k,l)*,$ Generally, $|S_i^0(k,l){|}^2=1.$ Therefore, formula (4) can be expressed as:

${\tilde{H}}_1^0(k,l)=H_i^0(k,l)+\stackrel{\‾}{N_1^{\mathrm{eff}}}(k,l)$ Formula (5)

That is to say, the channel that UE estimates comprises the channel that reference signal is corresponding and noise wherein said noise comprises the interference signal that send white noise and interfered cell.

Execution step S4, according to described channel, the correlation of the reference signal that reference signal symbol that zygote carrier position is identical is corresponding, forms correlation factor.

Yet, in the channel that step S3 obtains, still comprised the impact of white noise and interference signal.The present invention, need to be by the H in formula (5) in order to realize more accurately the measurement of RSRP _i ⁰(k, l), afterwards by formula (1) calculate channel corresponding to all reference signals position that different antennae sends power and average.And then the measurement of realization to RSRP.

Inventor finds, first, has with Target cell the reference signal S that send the interfered cell of various ce ll ID _i ⁿ(k, l) and S _i ⁰(k, l) is different signals, and both have irrelevance.And between the reference signal that send Target cell, be identical signal, both have very strong correlation.Therefore, can, by reference to the feature of the correlation of signal, based on formula (4), in conjunction with correlation, the reference signal of Target cell be extracted, to obtain RSRP.

Secondly, reference signal is a kind of pseudo-random signal, please continue to refer to Fig. 2, the port 0 of take describes as example, the reference signal symbol 0 that port 0 sends is identical with the sub-carrier positions at the reference signal place of reference signal symbol 2, and the sub-carrier positions at the reference signal place of reference signal symbol 1 and reference signal symbol 3 is as identical.That is to say, the reference signal correlation of reference signal symbol 0 and reference signal symbol 2 correspondences is stronger, and both correlation factors are and the reference signal correlation of reference signal symbol 1 and reference signal symbol 3 correspondences is also stronger, both correlation factors are $\left|\mathrm{real}({\tilde{H}}_i(k,1)*\mathrm{conj}{\tilde{H}}_i(k,3))\right|.$

Can be by the channel of the identical reference signal symbol of sub-carrier positions be carried out to conjugate multiplication, using the absolute value of conjugate multiplication real part as correlation factor.

Execution step S5, obtains Reference Signal Received Power based on described correlation factor.Can by described correlation factor and average obtain described Reference Signal Received Power RSRP.

Particularly, in the present embodiment, RSRP can be obtained by following formula:

${{\mathrm{RSRP}}_{\mathrm{tmp}1}}^{\mathrm{ant}}=\frac{\mathrm{abs}\left({\mathrm{\Σ}}_{k=1}^{k=2N}\mathrm{real}\right[{\tilde{H}}_i^{\mathrm{ant}}(k,0)*\mathrm{conj}\left({\tilde{H}}_i^{\mathrm{ant}}(k,2)\right)\left]\right)+\mathrm{abs}\left({\mathrm{\Σ}}_{k=1}^{k=2N}\mathrm{real}\right[{\tilde{H}}_i^{\mathrm{ant}}(k,1)*\mathrm{conj}\left({\tilde{H}}_i^{\mathrm{ant}}(k,3)\right)\left]\right)}{2*2N}$

Formula (6)

RSRP wherein _temp1 ^antfor Reference Signal Received Power.

Due to also uncorrelated between reference signal and interference signal, and it is relevant between reference signal, therefore, even there is interference signal in corresponding the listing of reference signal symbol, the absolute value of the real part after doing conjugate multiplication is correlation factor, actual extracting be the corresponding part of reference signal, therefore, in this obtains the process of correlation factor, got rid of the impact with the incoherent interference signal of reference signal.The measurement result of the RSRP obtaining is like this comparatively accurate.

With reference to figure 4, illustrated the schematic diagram of reference signal received power measurement method the second embodiment of the present invention, the something in common of the present embodiment and above-described embodiment repeats no more, the difference of the present embodiment and the above-mentioned embodiment of being is, after obtaining the step of Reference Signal Received Power, also comprise:

Execution step S6, according to described channel, the reference signal that reference signal symbol that zygote carrier position is identical is corresponding and the irrelevance of interference signal, form the uncorrelated factor.

Please continue to refer to Fig. 2, the port 0 of take describes as example, and the reference signal symbol 0 that port 0 sends is identical with the sub-carrier positions at the reference signal place of reference signal symbol 2.Uncorrelated between the reference signal of reference signal symbol 0 and reference signal symbol 2 correspondence positions and interference signal, therefore, reference signal symbol 0 and the reference signal of reference signal symbol 2 correspondences and the uncorrelated factor of interference signal are similarly, reference signal symbol 1 and the reference signal of reference signal symbol 3 correspondences and the uncorrelated factor of interference signal be 1 and reference signal correlation corresponding to reference signal symbol 3 also stronger, both correlation factors are

The channel of can antithetical phrase carrier position identical reference signal symbol carries out conjugate multiplication, usings the absolute value of imaginary part of conjugate multiplication as the uncorrelated factor.

Execution step S7, obtains interference signal received power based on the described uncorrelated factor.Can by the described uncorrelated factor and average obtain described interference signal received power.Specific as follows:

${\mathrm{Npower}}_i^{\mathrm{ant}}=\frac{\mathrm{abs}\left({\mathrm{\Σ}}_{k=1}^{k=2N}\mathrm{imag}\right[{\tilde{H}}_i^{\mathrm{ant}}(k,0)*\mathrm{conj}\left({\tilde{H}}_i^{\mathrm{ant}}(k,2)\right)\left]\right)+\mathrm{abs}\left({\mathrm{\Σ}}_{k=1}^{k=2N}\mathrm{imag}\right[{\tilde{H}}_i^{\mathrm{ant}}(k,1)*\mathrm{conj}\left({\tilde{H}}_i^{\mathrm{ant}}(k,3)\right)\left]\right)}{2*2N}$

Formula (7)

Npower wherein ₁ ^antfor interference signal received power.

By obtaining described interference signal received power, can know comparatively clearly the impact that interference signal is measured RSRP, thereby can assess the precision that RSRP measures.

Please continue to refer to Fig. 4, preferably, after obtaining interference signal received power, also comprise:

Execution step S8, in conjunction with the relation between described Reference Signal Received Power and interference signal received power, proofreaies and correct described Reference Signal Received Power, to obtain, proofreaies and correct rear Reference Signal Received Power.

By the step of described correction, can further improve the certainty of measurement of RSRP.

With reference to figure 5, illustrated the schematic diagram of step S8 mono-embodiment in Fig. 4.Step S8 roughly comprises the following steps:

Step S81, the relative size of more described interference signal received power and described Reference Signal Received Power;

Step S82, when described interference signal received power is less than the described Reference Signal Received Power of the first preset multiple, proofreaies and correct described Reference Signal Received Power, to obtain, proofreaies and correct rear Reference Signal Received Power.

Particularly, described the first preset multiple can be 3 ~ 5 times, can rule of thumb to described the first preset multiple, adjust, so that the result measuring in the method for measurement of RSRP and actual communication process is comparatively approaching.

For example, described the first preset multiple can be 4 times.Correspondingly, if when described interference signal received power is more than or equal to the described Reference Signal Received Power of 4 times, represent that the interference signal of sneaking in the interference of RSRP measurement is few, can not proofread and correct.Otherwise, if when described interference signal received power is less than the described Reference Signal Received Power of 4 times, representing that part interference signal sneaks into reference signal, need to proofread and correct described Reference Signal Received Power.

Conventionally in the measurement of RSRP, in reference signal, easily sneak into interference signal.Therefore preferably, in trimming process, can remove the interference signal of sneaking into.

With reference to figure 6, show the schematic diagram of Fig. 5 step S82 mono-embodiment.Particularly, step S82 roughly comprises step by step following:

Execution step S821, if described interference signal received power is greater than the described Reference Signal Received Power of the second preset multiple and is less than the described Reference Signal Received Power of the first preset multiple, after described correction, reference signal power is the poor of described Reference Signal Received Power and ten sixth interference signal received powers;

For example, the first preset multiple described herein is 4, and described the second preset multiple is 2, if i.e. 2RSRP _tmp1 ^ant< Npower ₁ ^ant< 4RSRP _tmp1 ^ant, after proofreading and correct, reference signal power is RSRP _tmp1 ^ant-1/16Npower ₁ ^ant.

Execution step S822, if described interference signal received power is greater than described Reference Signal Received Power and is less than the described Reference Signal Received Power of the second preset multiple, after described correction, reference signal power is the poor of interference signal received power described in described Reference Signal Received Power and 1/8th;

For example, described the second preset multiple is 2, if i.e. Npower ₁ ^ant< 2RSRP _tmp1 ^ant, after proofreading and correct, reference signal power is RSRP _tmp1 ^ant-1/8Npower ₁ ^ant.

Step S823, if interference signal received power is less than described Reference Signal Received Power, after described correction, reference signal power is the poor of interference signal received power described in described Reference Signal Received Power and 1/4th.For example,, if Npower ₁ ^ant< RSRP _tmp1 ^ant, after proofreading and correct, reference signal power is RSRP _tmp1 ^ant-1/4Npower ₁ ^ant.

It should be noted that, described the first preset multiple and the second preset multiple can rule of thumb be adjusted, the ratio that Reference Signal Received Power deducts interference signal received power also can arrange based on experience, so that make the Reference Signal Received Power after correction more accurate.

The present invention also provides a kind of method of gravity treatment, comprise: the measurement of Reference Signal Received Power is carried out in current area and adjacent cell, the method of measurement that is measured as above-mentioned Reference Signal Received Power of described Reference Signal Received Power, particularly, the method of measurement of Reference Signal Received Power can, with reference to the content of foregoing description, not repeat them here;

When the Reference Signal Received Power that measures adjacent cell is greater than the Reference Signal Received Power of current area, switches to adjacent cell and carry out resident.

The present invention also provides a kind of Reference Signal Received Power measurement mechanism, and described measurement mechanism can be arranged in UE, is connected with the antenna of UE, for the signal to antenna reception, processes.With reference to figure 7, show the schematic diagram of Reference Signal Received Power measurement mechanism one embodiment of the present invention.Described Reference Signal Received Power measurement mechanism comprises:

Reference signal unit 100, is connected with described antenna, at described antenna reception, after signal, is applicable to find out reference signal and corresponding reference signal symbol from described signal.It should be noted that, described reference signal unit 100 can directly be connected with described antenna, also can indirectly be connected, and should not limit the present invention with this.

Frequency-region signal unit 101, is connected with described reference signal unit 100, is applicable to obtain the corresponding frequency-region signal of reference signal symbol of finding out with reference signal unit 100;

Channel Elements 102, is connected with described frequency-region signal unit 101, described reference signal unit 100, is applicable to the frequency-region signal based on 101 acquisitions of described frequency-region signal unit, obtains the channel of the reference signal corresponding with described reference signal symbol; Particularly, the mould of the conjugate multiplication of the reference signal that the frequency-region signal that described Channel Elements 102 obtains according to described frequency-region signal unit 101 conventionally and described reference signal unit 100 are found out, obtain described channel, but the mode that the present invention obtains channel to Channel Elements 102 is not restricted.

Correlation factor unit 103, be connected with described Channel Elements 102, described reference signal unit 100, be applicable to the channel obtaining according to described Channel Elements 102, correlation between reference signal corresponding to reference signal symbol that the sub-carrier positions found out in conjunction with reference signal unit 100 is identical, forms correlation factor; Particularly, described correlation factor unit 103, can carry out conjugate multiplication according to the channel of the identical reference signal symbol of the sub-carrier positions of Channel Elements 102 acquisitions, using the absolute value of conjugate multiplication real part as correlation factor, but the mode that the present invention obtains correlation factors to correlation factor unit 103 is not restricted.

Reference Signal Received Power unit 104, is connected with described correlation factor unit 103, is applicable to the correlation factor based on the formation of described correlation factor unit, obtains Reference Signal Received Power.Generally described Reference Signal Received Power unit 104, be applicable to the correlation factor that forms according to described correlation factor unit 103 and average, obtain described Reference Signal Received Power.

The principle that described reference signal unit 100, frequency-region signal unit 101, Channel Elements 102 correlation factor unit 103 and Reference Signal Received Power unit 104 cooperatively interact, the content that can describe with reference to method of measurement the first embodiment of RSRP, does not repeat them here.

With reference to figure 8, show the schematic diagram of Reference Signal Received Power measurement mechanism two embodiment of the present invention.The present embodiment part that is basically the same as those in the first embodiment repeats no more, and the difference of the present embodiment and the first embodiment is, described Reference Signal Received Power measurement mechanism also comprises:

Uncorrelated factor unit 105, be connected with described Channel Elements 102, reference signal unit 100, be applicable to the channel obtaining according to described Channel Elements 102, the reference signal that reference signal symbol that the sub-carrier positions found out in conjunction with reference signal unit 100 is identical is corresponding and the irrelevance between interference signal, form the uncorrelated factor; Described uncorrelated factor unit 105, the channel that is applicable to the reference signal symbol that sub-carrier positions that Channel Elements 102 is obtained is identical carries out conjugate multiplication, usings the absolute value of imaginary part of conjugate multiplication as the uncorrelated factor.

Interference signal received power unit 106, is connected with described uncorrelated factor unit 105, and the uncorrelated factor that is applicable to form based on uncorrelated factor unit 105 obtains interference signal received power.

The operation principle of described uncorrelated factor unit 105, interference signal receiving element 106, the content that can describe with reference to method of measurement the second embodiment of RSRP, does not repeat them here.

Please continue to refer to Fig. 8, preferably, Reference Signal Received Power measurement mechanism also comprises:

Correcting unit 107, be connected with described Reference Signal Received Power unit 104, described interference signal received power unit 106, relativeness between the Reference Signal Received Power that is applicable to obtain in conjunction with Reference Signal Received Power unit 104, the interference signal received power that described interference signal received power unit 106 obtains, described Reference Signal Received Power is proofreaied and correct, to obtain, proofreaied and correct rear Reference Signal Received Power.

Described correcting unit 107 can judge whether to proofread and correct by interference signal received power and described Reference Signal Received Power relative size.

Particularly, described correcting unit 107 comprises:

Comparator 1071, be provided with the first preset multiple, be connected with described Reference Signal Received Power unit 104, described interference signal received power unit 106, be applicable to more described interference signal received power and described Reference Signal Received Power relative size, when described interference signal received power is less than the described Reference Signal Received Power of the first preset multiple, form triggering signal;

Adjuster 1072, be connected with described Reference Signal Received Power unit 104, described comparator 106, be applicable to, when receiving the triggering signal that described adjuster 1070 sends, described Reference Signal Received Power be proofreaied and correct, with obtain proofread and correct after Reference Signal Received Power.

Described adjuster 1072, is provided with the first preset multiple and the second preset multiple, and described the second preset multiple is less than described the first preset multiple, and described adjuster 1072 is also connected with described interference signal received power unit 105; Described comparator 1071, when described interference signal received power is greater than the described Reference Signal Received Power of the second preset multiple and is less than the described Reference Signal Received Power of the first preset multiple, sends the first triggering signal; Described adjuster 1072 is when receiving described the first triggering signal, and poor according to the Reference Signal Received Power of Reference Signal Received Power unit 104 and ten sixth interference signal received powers, obtains reference signal power after described correction;

Described comparator 1071 can also, when described interference signal received power is greater than described Reference Signal Received Power and is less than the described Reference Signal Received Power of the second preset multiple, send the second triggering signal; Described adjuster 1072 is applicable to when receiving described the second triggering signal, and poor according to interference signal received power described in described Reference Signal Received Power and 1/8th obtains reference signal power after described correction;

Described comparator 1071 is applicable to, when described interference signal received power is less than described Reference Signal Received Power, send the 3rd triggering signal; Described adjuster 1072 is applicable to when receiving described the 3rd triggering signal, according to described reference signal power, is the poor of interference signal received power described in described Reference Signal Received Power and 1/4th, obtains reference signal power after described correction.

Correspondingly, the present invention also provides a kind of user side (User Experience, UE), comprising: reference signal power measurement mechanism provided by the present invention.The concrete technical scheme of described reference signal power measurement mechanism please refer to aforementioned content, does not repeat them here.

Particularly, described user side can make the mobile communication equipment of mobile phone etc.Described measurement mechanism can be arranged in described mobile phone.

Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize method and the technology contents of above-mentioned announcement to make possible change and modification to technical solution of the present invention; therefore; every content that does not depart from technical solution of the present invention; any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, all belong to the protection range of technical solution of the present invention.

Claims (21)

1. a reference signal received power measurement method, is characterized in that, comprising:

From the signal receiving, find out reference signal and corresponding reference signal symbol;

From described signal, obtain the frequency-region signal corresponding with described reference signal symbol;

Based on described frequency-region signal, obtain the channel of the reference signal corresponding with described reference signal symbol;

According to described channel, the correlation of the reference signal that reference signal symbol that zygote carrier position is identical is corresponding, forms correlation factor;

Based on described correlation factor, obtain Reference Signal Received Power.

2. method of measurement as claimed in claim 1, is characterized in that, also comprises:

According to described channel, the reference signal that reference signal symbol that zygote carrier position is identical is corresponding and the irrelevance of interference signal, form the uncorrelated factor;

Based on the described uncorrelated factor, obtain interference signal received power.

3. method of measurement as claimed in claim 2, is characterized in that, also comprises:

In conjunction with the relation between described Reference Signal Received Power and interference signal received power, described Reference Signal Received Power is proofreaied and correct, to obtain, proofread and correct rear Reference Signal Received Power.

4. method of measurement as claimed in claim 3, is characterized in that, obtains the step of Reference Signal Received Power after proofreading and correct and comprises:

The relative size of more described interference signal received power and described Reference Signal Received Power;

When described interference signal received power is less than the described Reference Signal Received Power of the first preset multiple, described Reference Signal Received Power is proofreaied and correct, to obtain, proofread and correct rear Reference Signal Received Power.

5. method of measurement as claimed in claim 4, is characterized in that, described Reference Signal Received Power is proofreaied and correct, and obtains the step of Reference Signal Received Power after proofreading and correct and comprises:

If described interference signal received power is greater than the described Reference Signal Received Power of the second preset multiple and is less than the described Reference Signal Received Power of the first preset multiple, after described correction, reference signal power is the poor of described Reference Signal Received Power and ten sixth interference signal received powers;

If described interference signal received power is greater than described Reference Signal Received Power and is less than the described Reference Signal Received Power of the second preset multiple, after described correction, reference signal power is the poor of interference signal received power described in described Reference Signal Received Power and 1/8th;

If interference signal received power is less than described Reference Signal Received Power, after described correction, reference signal power is the poor of interference signal received power described in described Reference Signal Received Power and 1/4th.

6. method of measurement as claimed in claim 1, is characterized in that, described based on described frequency-region signal, and the step that obtains the channel corresponding with reference signal symbol comprises:

Conjugate multiplication based on frequency-region signal and described reference signal, obtains described channel.

7. method of measurement as claimed in claim 1, is characterized in that, according to described channel, and the reference signal correlation of the reference signal symbol that zygote carrier position is identical, the step that forms correlation factor comprises:

Channel to the identical reference signal symbol of sub-carrier positions carries out conjugate multiplication, usings the absolute value of conjugate multiplication real part as correlation factor.

8. method of measurement as claimed in claim 2, is characterized in that, according to described channel, and the reference signal of reference signal symbol that zygote carrier position is identical and the being not related to property of interference signal, the step that forms the uncorrelated factor comprises:

Channel to the identical reference signal symbol of sub-carrier positions carries out conjugate multiplication, usings the absolute value of imaginary part of conjugate multiplication as the uncorrelated factor.

9. method of measurement as claimed in claim 1, is characterized in that, the described step based on described correlation factor acquisition Reference Signal Received Power comprises:

By described correlation factor and average obtain described Reference Signal Received Power.

10. a method for gravity treatment, is characterized in that, comprising:

The measurement of Reference Signal Received Power is carried out in current area and adjacent cell, described Reference Signal Received Power be measured as the reference signal received power measurement method described in any claim of claim 1 ~ 9;

When the Reference Signal Received Power that measures adjacent cell is greater than the Reference Signal Received Power of current area, switches to adjacent cell and carry out resident.

11. 1 kinds of Reference Signal Received Power measurement mechanisms, is characterized in that, comprising:

Reference signal unit, is applicable to find out reference signal and corresponding reference signal symbol;

The frequency-region signal unit being connected with described reference signal unit, is applicable to obtain the corresponding frequency-region signal of reference signal symbol of finding out with reference signal unit;

With the Channel Elements that described frequency-region signal unit, described reference signal unit are connected, be applicable to the frequency-region signal based on the acquisition of described frequency-region signal unit, obtain the channel of the reference signal corresponding with described reference signal symbol;

The correlation factor unit being connected with described Channel Elements, described reference signal unit, be applicable to the channel obtaining according to described Channel Elements, correlation between reference signal corresponding to reference signal symbol that the sub-carrier positions found out in conjunction with reference signal unit is identical, forms correlation factor;

With the Reference Signal Received Power unit that described correlation factor unit is connected, be applicable to the correlation factor based on the formation of described correlation factor unit, obtain Reference Signal Received Power.

12. measurement mechanisms as claimed in claim 11, is characterized in that, also comprise:

The uncorrelated factor unit being connected with described Channel Elements, reference signal unit, be applicable to the channel obtaining according to described Channel Elements, the reference signal that reference signal symbol that the sub-carrier positions found out in conjunction with reference signal unit is identical is corresponding and the irrelevance between interference signal, form the uncorrelated factor;

The interference signal received power unit being connected with described uncorrelated factor unit, is applicable to obtain interference signal received power based on the described uncorrelated factor.

13. measurement mechanisms as claimed in claim 12, is characterized in that, also comprise:

The correcting unit being connected with described Reference Signal Received Power unit, described interference signal received power unit, relativeness between the Reference Signal Received Power that is applicable to obtain in conjunction with Reference Signal Received Power unit, the interference signal received power that described interference signal received power unit obtains, described Reference Signal Received Power is proofreaied and correct, to obtain, proofreaied and correct rear Reference Signal Received Power.

14. measurement mechanisms as claimed in claim 13, is characterized in that, described correcting unit comprises:

The comparator being connected with described Reference Signal Received Power unit, described interference signal received power unit, be applicable to more described interference signal received power and described Reference Signal Received Power relative size, when described interference signal received power is less than the described Reference Signal Received Power of the first preset multiple, form triggering signal;

With the adjuster that described Reference Signal Received Power unit, described comparator are connected, be applicable to, when receiving the triggering signal that described adjuster sends, described Reference Signal Received Power be proofreaied and correct, with obtain proofread and correct after Reference Signal Received Power.

15. measurement mechanisms as claimed in claim 14, is characterized in that, described adjuster is also connected with described interference signal received power unit;

Described comparator is applicable to, when described interference signal received power is greater than the described Reference Signal Received Power of the second preset multiple and is less than the described Reference Signal Received Power of the first preset multiple, send the first triggering signal; Described adjuster is applicable to when receiving described the first triggering signal, and poor according to described Reference Signal Received Power and ten sixth interference signal received powers obtains reference signal power after described correction;

Described comparator is applicable to, when described interference signal received power is greater than described Reference Signal Received Power and is less than the described Reference Signal Received Power of the second preset multiple, send the second triggering signal; Described adjuster is applicable to when receiving described the second triggering signal, and poor according to interference signal received power described in described Reference Signal Received Power and 1/8th obtains reference signal power after described correction;

Described comparator is applicable to, when described interference signal received power is less than described Reference Signal Received Power, send the 3rd triggering signal; Described adjuster is applicable to when receiving described the 3rd triggering signal, according to described reference signal power, is the poor of interference signal received power described in described Reference Signal Received Power and 1/4th, obtains reference signal power after described correction.

16. measurement mechanisms as claimed in claim 11, is characterized in that, described Channel Elements is applicable to the mould of the conjugate multiplication of the reference signal that the frequency-region signal that obtains according to described frequency-region signal unit and described reference signal unit find out, and obtains described channel.

17. measurement mechanisms as claimed in claim 11, it is characterized in that, described correlation factor unit, the channel that is applicable to the reference signal symbol that sub-carrier positions that Channel Elements is obtained is identical carries out conjugate multiplication, usings the absolute value of conjugate multiplication real part as correlation factor.

18. measurement mechanisms as claimed in claim 12, it is characterized in that, described uncorrelated factor unit, the channel that is applicable to the reference signal symbol that sub-carrier positions that Channel Elements is obtained is identical carries out conjugate multiplication, usings the absolute value of imaginary part of conjugate multiplication as the uncorrelated factor.

19. measurement mechanisms as claimed in claim 11, is characterized in that, described Reference Signal Received Power unit, be applicable to the correlation factor that forms according to described correlation factor unit and average, obtain described Reference Signal Received Power.

20. 1 kinds of user sides, is characterized in that, comprising: the measurement mechanism of the reference signal power as described in a claim as any in claim 11 ~ 19.

21. user sides as claimed in claim 20, is characterized in that, described user side is mobile phone, and described measurement mechanism is arranged in described mobile phone.