CN104469837A - Method and terminal for determining reference signal receiving power and system - Google Patents

Abstract

The invention provides a method and terminal for determining reference signal receiving power and a system. The method includes the steps that two specific cell reference signals are generated, and the two specific cell reference signals are the reference signals corresponding to a measuring cell and an interference cell respectively; according to the two specific cell reference signals and received signals, channel estimation is conducted on signals on all adjacent resource elements with the reference signals of the measuring cell, and the channel estimation results corresponding to all the adjacent resource elements are obtained; matching is conducted on the adjacent resource elements, and resource element pairs are obtained; the channel estimation values of all resource blocks are determined according to channel estimation result pairs corresponding to the resource element pairs so as to obtain the channel estimation value of the measuring cell and determine the reference signal receiving power of the measuring cell. By means of the method and terminal for determining the reference cell signal receiving power and the system, the influence of the strong-interference cell on the measuring cell can be eliminated effectively, and the measuring accuracy of the measuring cell is improved.

Description

For determining the method for Reference Signal Received Power, terminal and system

Technical field

The present invention relates to communication technical field, in particular to the method for determining Reference Signal Received Power, terminal and system.

Background technology

In LTE system or LTE evolution system, the measurement configuration information that terminal provides according to universal land radio access web is to base station repeats metrical information (RSRP(Reference Signal Receiving Power) or RSRQ(Reference Singnal Receiving Quality)).In LTE system, general RSRP measures and usually usually utilizes the cell specific reference signal in Measurement bandwidth to determine the Reference Signal Received Power of community.As shown in Figure 1, be general RSRP method of measurement:

Suppose that the signal received is r (l, i)=h (l, i) x (l, i)+n (l, i), here, r (l, i) is the cell specific reference signal symbol on frequency domain received, x (l, i) be that frequency domain is i and time domain is local replica (l=0,1 of the cell specific reference signal of l; 0<i<2N _rB, N _rBthe number of resource blocks under frequency direction), h (l, i) is the channel response measuring community.

1) channel estimating of community is measured:

2) power calculation: $h_{\mathrm{tmp}}\left(i\right)=(\hat{h}(0,i)+\hat{h}(1,i))/2$

$P={\left|\underset{i=0}{\overset{2N_{\mathrm{RB}}-1}{\mathrm{\&Sigma;}}}{h}_{\mathrm{tmp}}\left(i\right)\right|}^2;$

3) RSRP(Reference Signal Received Power is calculated): RSRP=10 × log10 (P).

In LTE Rel.10 and Rel.11, heterogeneous network is widely studied for solving the problem of closing load flow and cell range expansion.FeICIC is called at the eICIC(of 3GPP Rel-11 version) in, the specific reference signals of strong jamming community is inconsistent with the specific reference signals being subject to strongly disturbing community, and the Signal to Interference plus Noise Ratio of the specific cell reference signal of the measurement community that ABS subframe is measured is-9.4dB.So in order to accurately measure the received power being subject to the specific cell reference signal of strong jamming community, a lot of company proposes to eliminate based on the CRSIC(public reference signal interference of RSRP method of measurement), with reference to figure 2, be below that the basic CRSIC based on RSRP method of measurement measures:

Suppose that the signal received is r (l, i)=h ₀(l, i) x ₀(l, i)+h ₁(l, i) x ₁(l, i)+n (l, i), here, r (l, i) is the cell specific reference signal symbol on frequency domain received, x ₀(l, i) and x ₁(l, i) is that frequency domain is i respectively and time domain is local replica (l=0,1 of the measurement community of l and the cell specific reference signal of strong jamming community; 0<i<2N _rB, N _rBthe number of resource blocks under frequency direction), h ₀(l, i) and h ₁(l, i) is the channel response measuring community and strong jamming community respectively.

1) channel estimating of strong jamming community:

${\hat{h}}_1^{\mathrm{tmp}}(l,i)=r(l,i)x_1^{*}(l,i),{\hat{h}}_1(l,i)=w(l,i){\hat{h}}_1^{\mathrm{tmp}}(l,i),w(l,i)$ It is filter;

2) signal of strong jamming community is generated:

3) signal of strong jamming community is removed: r _cancel(l, i)=r (l, i)-y (l, i);

4) channel estimating of community is measured:

5) rated output: $h_{\mathrm{tmp}}\left(i\right)=({\hat{h}}_0(0,i)+{\hat{h}}_0(1,i))/2,$

$P={\left|\underset{i=0}{\overset{2N_{\mathrm{RB}}-1}{\mathrm{\&Sigma;}}}{h}_{\mathrm{tmp}}\left(i\right)\right|}^2;$

6) received power of computing reference signal: RSRP=10 × log10 (P).

For the method for measurement of the received power of general reference signal, owing to being subject to the high power interference of strong jamming community in heterogeneous network, in FeICIC, the certainty of measurement of Reference Signal Received Power is lowered.For the method removing interference, owing to adding the channel estimating of strong jamming community and relevant removal step, so add computation complexity.

The problem at present also not having correlation technique to solve current reference signal received power measurement method to run into.

Summary of the invention

The present invention, just based on above-mentioned technical problem, proposes a kind of new reference signal Signal reception power technology, both can improve the certainty of measurement measuring community, and also can reduce computation complexity.

In view of this, according to an aspect of the present invention, providing a kind of method for determining Reference Signal Received Power, comprising: generate two specific cell reference signals, described two specific cell reference signals correspond respectively to the reference signal measuring community and interfered cell; For each Resource Block at least one Resource Block of described measurement community, according to described two specific cell reference signals and the signal received, channel estimating is carried out to signal had on the resource element of reference signal each in described Resource Block, obtains the channel estimation results corresponding with each described resource element; The Adjacent resource element with reference signal is matched, obtains at least one resource element pair mated; According to at least one resource element described to corresponding channel estimation results pair, determine the channel estimation value of each Resource Block described, get the channel estimation value of mean value as described measurement community of at least one channel estimation value corresponding with at least one Resource Block described; Channel estimation value based on described measurement community determines the Reference Signal Received Power of described measurement community.

The present invention combines the signal measuring community and interfered cell and obtains the channel response measuring community, in the computational process of channel response, find out the resource element pair of coupling, according to the resource element of pairing on a pair channel estimation results eliminate the impact of interfered cell, thus the channel estimating that demand does not carry out interfered cell just directly can obtain the channel response measuring community, because this reducing computation complexity, and affect removal step itself with certain error due to the channel estimating of strong jamming community and strong jamming community, therefore method of measurement can further improve the precision of channel estimation measuring community according to an embodiment of the invention.

According to a further aspect in the invention, additionally provide a kind of terminal, comprising: reference signal generation unit, for generating two specific cell reference signals, described two specific cell reference signals correspond respectively to the reference signal measuring community and interfered cell; First channel estimating unit, for each Resource Block at least one Resource Block for described measurement community, according to described two specific cell reference signals and the signal received, channel estimating is carried out to signal had on the Adjacent resource element of reference signal each in described Resource Block, obtains the channel estimation results corresponding with each described resource element; Matching unit, for matching to the Adjacent resource element with reference signal, obtains at least one resource element pair mated; Second channel estimation unit, for according to at least one resource element described to corresponding channel estimation results pair, determine the channel estimation value of each Resource Block described, get the channel estimation value of mean value as described measurement community of at least one channel estimation value corresponding with at least one Resource Block described; Power determining unit, the channel estimation value based on described measurement community determines the Reference Signal Received Power of described measurement community.

The present invention combines the signal measuring community and interfered cell and obtains the channel response measuring community, in the computational process of channel response, find out the resource element pair of coupling, according to the resource element of pairing on a pair channel estimation results eliminate the impact of interfered cell, thus the channel estimating that demand does not carry out interfered cell just directly can obtain the channel response measuring community, because this reducing computation complexity, and affect removal step itself with certain error due to the channel estimating of strong jamming community and strong jamming community, therefore terminal can further improve the precision of channel estimation measuring community according to an embodiment of the invention.

According to a further aspect in the invention, additionally provide a kind of system, comprise base station and the terminal as described in technique scheme.

According to another aspect of the invention, additionally provide a kind of program product be stored in nonvolatile machine-readable media, for determining Reference Signal Received Power, described program product comprises the machine-executable instruction for making computer system perform following steps: generate two specific cell reference signals, and described two specific cell reference signals correspond respectively to the reference signal measuring community and interfered cell; For each Resource Block at least one Resource Block of described measurement community, according to described two specific cell reference signals and the signal received, channel estimating is carried out to signal had on the resource element of reference signal each in described Resource Block, obtains the channel estimation results corresponding with each described resource element; The Adjacent resource element with reference signal is matched, obtains at least one resource element pair mated; According to at least one resource element described to corresponding channel estimation results pair, determine the channel estimation value of each Resource Block described, get the channel estimation value of mean value as described measurement community of at least one channel estimation value corresponding with at least one Resource Block described; Channel estimation value based on described measurement community determines the Reference Signal Received Power of described measurement community.

According to another aspect of the invention, additionally provide a kind of non-volatile machine readable media, store the program product for determining Reference Signal Received Power, described program product comprises the machine-executable instruction for making computer system perform following steps: generate two specific cell reference signals, and described two specific cell reference signals correspond respectively to the reference signal measuring community and interfered cell; For each Resource Block at least one Resource Block of described measurement community, according to described two specific cell reference signals and the signal received, channel estimating is carried out to signal had on the resource element of reference signal each in described Resource Block, obtains the channel estimation results corresponding with each described resource element; The Adjacent resource element with reference signal is matched, obtains at least one resource element pair mated; According to at least one resource element described to corresponding channel estimation results pair, determine the channel estimation value of each Resource Block described, get the channel estimation value of mean value as described measurement community of at least one channel estimation value corresponding with at least one Resource Block described; Channel estimation value based on described measurement community determines the Reference Signal Received Power of described measurement community.

In accordance with a further aspect of the present invention, additionally provide a kind of machine readable program, wherein when performing described machine readable program in the terminal, described program makes machine in described terminal, perform the above-mentioned method for determining Reference Signal Received Power.

In accordance with a further aspect of the present invention, additionally provide a kind of storage medium storing machine readable program, it is as above for determining the method for Reference Signal Received Power that wherein said machine readable program makes machine perform in the terminal.

Above technical scheme carries out channel estimating by the reference signal of combined measurement community and the reference signal of strong jamming community, and is matched by resource element, the impact of strong jamming community is efficiently removed, and improves the certainty of measurement in small and weak district.

Accompanying drawing explanation

Fig. 1 shows the schematic diagram of the RSRP method of measurement in correlation technique;

Fig. 2 shows the schematic diagram of the CRSIC method of measurement in correlation technique;

Fig. 3 shows the corresponding relation schematic diagram of the bandwidth resources of the LTE system in correlation technique;

Fig. 4 A shows the Adjacent resource element schematic diagram in bandwidth resources with reference signal;

Fig. 4 B shows the flow chart of the method for determining Reference Signal Received Power according to an embodiment of the invention;

Fig. 5 shows the flow chart of the method for determining Reference Signal Received Power according to another embodiment of the present invention;

Fig. 6 shows the block diagram of terminal according to an embodiment of the invention;

Fig. 7 shows the block diagram of system according to an embodiment of the invention.

Embodiment

In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.

Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from other modes described here and implement, and therefore, the present invention is not limited to the restriction of following public specific embodiment.

Before explanation is according to the method for determining Reference Signal Received Power of the present invention, the bandwidth resources in first composition graphs 3 pairs of LTE system briefly introduce.

As shown in Figure 3, in LTE system, a radio frames is 10ms, comprise 10 subframes that subframe index is 0 to 9, each subframe is 1ms, and 1 subframe is divided into again 2 time slots, if normal cp pattern, each time slot has 7 OFDM(Orthogonal Frequency Division Multiplexing of notation index l=0 to l=6, OFDM) symbol.System carries out Resourse Distribute by Resources allocation block RB, and the RB quantity that different bandwidth correspondence is distributed is different.Under normal circumstances, 1RB comprises the time-domain resource of a Time Slot Occupancy in time, and frequency comprises the resource of 12 sub-carrier occupancies usually, and the resource of a sub-carrier occupancy in an OFDM symbol is called resource element RE(Resource Element).

In an embodiment according to the present invention, the information of the specific reference signals of combined measurement community and the specific reference signals of interfered cell, easily realizes the channel estimating measuring community.It should be noted that, generally, when the interfered cell of interferometry community has multiple, the specific reference signals of the community selecting power stronger from multiple interfered cell is used as the specific reference signals of the interfered cell of the Reference Signal Received Power for computation and measurement community, can certainly select arbitrarily an interfered cell.

Fig. 4 A shows the flow chart of the method for determining Reference Signal Received Power according to an embodiment of the invention.

According to an embodiment of the invention for determining that the method for Reference Signal Received Power can comprise the following steps:

Step 402, generates two specific cell reference signals, and these two specific cell reference signals correspond respectively to the reference signal measuring community and interfered cell;

Step 404, for each Resource Block measured at least one Resource Block of community, according to above-mentioned two specific cell reference signals and the signal received, channel estimating is carried out to each signal had on the Adjacent resource element of reference signal of a Resource Block, obtains the channel estimation results corresponding with each resource element;

Step 406, matches to the Adjacent resource element with reference signal, obtains at least one resource element pair mated;

Step 408, according to at least one resource element to corresponding channel estimation results pair, determine the channel estimation value of each Resource Block, get the mean value of at least one channel estimation value corresponding with at least one Resource Block as the channel estimation value measuring community;

Step 410, determines based on the channel estimation value measuring community the Reference Signal Received Power measuring community.

In a step 406, match to the Adjacent resource element with reference signal, the right step of at least one resource element obtaining mating comprises:

Calculate the phase difference between reference signal on each Adjacent resource element and the reference signal of interfered cell;

According to the phase difference of each Adjacent resource element, the Adjacent resource element with reference signal is compared between two, obtain the phase difference difference of every a pair Adjacent resource element;

Described phase difference difference is more than or equal to the resource element of preset value to the resource element pair as described coupling.

As shown in Figure 4 B, suppose that A1, A2, B1, B2 are the Adjacent resource element with reference signal in a Resource Block respectively, these resource elements are matched, need before this to calculate the phase difference between reference signal on each Adjacent resource element and the reference signal of interfered cell, in Adjacent resource elements A 1, A2, B1, B2, need to calculate the phase difference between reference signal on these four adjacent elements and the reference signal of interfered cell, calculating the phase difference corresponding respectively with A1, A2, B1, B2 is Q1, Q2, Q3 and Q4 respectively.

Then usually find out for each Adjacent resource unit the Adjacent resource element matched, in search procedure, the difference (i.e. phase difference difference) between phase difference corresponding to two Adjacent resource elements need be calculated between two, such as selected resource element A1, the difference of A1 respectively and between the corresponding phase difference of other three Adjacent resource elements need be calculated, namely calculate Q1 respectively with the difference of Q2, Q3 and Q4, determine the Adjacent resource element matched with A1 according to the situation of difference.

Concrete, when phase difference difference is more than or equal to preset value, using selected resource element and other corresponding Adjacent resource elements as resource element pair.Wherein, this preset value can be 180 degree, 90 degree, 80 degree, 70 degree, or the arbitrary value between 90 degree to 80 degree, or the arbitrary value between 80 degree and 70 degree, if the difference between Q1 and Q2 is more than or equal to preset value, then illustrates that A1 can match with A2.

Consider and measure hour offset between the reference signal of community and the reference signal of interfered cell and frequency deviation is moved, therefore need to revise phase difference between reference signal on each Adjacent resource element and the reference signal of interfered cell, to ensure the accuracy of the phase difference calculated according to these two parameters.

When revising, determine the phase difference between reference signal on each Adjacent resource element and the reference signal of interfered cell according to following phase calculation formula:

$\mathrm{\&theta;}(l,i)=\mathrm{phase}\left\{x_1(l,i)x_0^{*}(l,i)e^{j2\mathrm{\&pi;}(\mathrm{i\&Delta;t}/N_{\mathrm{FFT}}+\mathrm{l\&Delta;T\&Delta;f}/f_s)}\right\},$

Wherein, l is OFDM symbol, and i is sub-carrier, and θ (l, i) is phase difference, x ₁(l, i) is the reference signal of interfered cell, x ₀(l, i) is the reference signal measuring community, f _sbe sample rate, Δ f is frequency offset value, and Δ t is hour offset value, N _fFTbe Fourier transform data volume size, Δ T is the time difference between the reference signal on selected resource element (such as A1) and other Adjacent resource elements (in such as A2, B1, B2 any one), and phase{} is phase function.

If match multipair resource element pair for a Resource Block, then according to multipair resource element to determining multiple channel estimation value, get the mean value of multiple channel estimation value as the channel estimation value corresponding with a Resource Block.

Continue for above-mentioned example, if find A1 and A2 coupling in a Resource Block, B1 and B2 mates, namely find two couplings right, due to according to a pair coupling to the channel estimation value that can calculate at this Resource Block, so two couplings are to two channel estimation values that just can calculate this Resource Block, the mean value W1 that can get these two channel estimation values is used as the channel estimation value of current resource block, or also the maximum can got in two channel estimation values is used as the channel estimation value of current resource block.

Like this, if having chosen 50 Resource Block, just can calculate 50 channel estimation values, the mean value getting these 50 channel estimation values, as the channel estimation value measuring community, determines based on final channel estimation value the Reference Signal Received Power measuring community.

If do not match resource element pair in the Adjacent resource element in this prior in Resource Block, then using the channel estimation value on Adjacent resource block after weighting process as the channel estimation value corresponding with current resource block, even in A1, A2, B1, B2, do not find resource element pair, then using a upper Resource Block of this current resource element block or the channel estimation value of next Resource Block channel estimation value as this current resource block.

Explain in detail below according to of the present invention for determining that the method for Reference Signal Received Power is being the impact that how can realize eliminating interfered cell on measuring when channel estimating is carried out in community.

In above-mentioned steps 404, zero forcing algorithm is adopted to carry out channel estimating to the reference signal measured on each Adjacent resource element of community:

$r(l,i)x_0^{*}(l,i)=h_0(l,i)+h_1(l,i)x_1(l,i)x_0^{*}(l,i)+n(l,i)x_0^{*}(l,i),$

Wherein, r (l, i) is the signal received, x ₀(l, i) is the reference signal measuring community, x ₁(l, i) is the reference signal of interfered cell, and n (l, i) is noise, and l is OFDM symbol, and i is sub-carrier, h ₀(l, i) is the channel response measuring community, h ₁(l, i) is the channel response of interfered cell.

Namely each adjacent element has corresponding channel estimation results:

$r(l,i)x_0^{*}(l,i)=h_0(l,i)+h_1(l,i)x_1(l,i)x_0^{*}(l,i)+n(l,i)x_0^{*}(l,i),$ Illustrate above, in a Resource Block, find resource element pair, suppose that the resource element that matches is to being A1 and A2 and difference between phase difference is 180 degree, so corresponding with A1 channel estimation results is:

${\hat{h}}_0=r(l,i)x_0^{*}(l,i)=h_0+h_1{x}_1{x}_0^{*}+{\mathrm{nx}}_0^{*}---\left(1\right),$

The channel estimation results corresponding with A2 is:

${\hat{h}}_0=r(l,i)x_0^{*}(l,i)=h_0-h_1{x}_1{x}_0^{*}+{\mathrm{nx}}_0^{*}---\left(2\right)$

(1) formula is added with (2) formula, eliminates this unknown ( known terms, for constant), namely eliminate interfered cell to the impact of measuring community, the channel response h measuring community can be obtained fast ₀, thus improve the certainty of measurement measuring community, without the need to calculating the channel estimating response h of interfered cell ₁, therefore computation complexity is greatly diminished and also improves the channel estimation accuracy measuring community.

Following composition graphs 5 further illustrates another embodiment according to the method for determining Reference Signal Received Power of the present invention.

In the present embodiment, the specific reference signals of combined measurement community and the specific reference signals information of strong jamming community, easily realize the channel estimating measuring community.

Suppose that the signal that terminal receives is r (l, i)=h ₀(l, i) x ₀(l, i)+h ₁(l, i) x ₁(l, i)+n (l, i), r (l, i) are the specific reference signals received, x ₀(l, i), x ₁(l, i) is the local replica of the specific reference signals measuring community and strong jamming community respectively, h ₀(l, i) and h ₁(l, i) is the channel response measuring community and strong jamming community respectively.

Step 502, generates specific reference signals.

The local replica x of specific reference signals is generated according to cell ID information, Slot symbol information and abs mode information ₀(l, i), x ₁(l, i).

Step 504, carries out ZF channel estimating to the resource element with reference signal measuring community.

The ZF channel response measuring community estimates it is h _zF(l, i), i is the carrier number of reference signal, and l is the OFDM symbol of reference signal.

Step 506, the difference between calculating phase difference.

The specific reference signals copy of strong jamming community and measurement community is x respectively ₀(l, i), x ₁(l, i).Between two specific reference signals considering interfered cell time partially and frequency deviation, the phase difference between Liang Ge community between the frequency resource shared by specific reference signals is defined as:

$\mathrm{\&theta;}(l,i)=\mathrm{phase}\left\{x_1(l,i)x_0^{*}(l,i)e^{j2\mathrm{\&pi;}(\mathrm{i\&Delta;\&tau;}/N_{\mathrm{FFT}}+\mathrm{l\&Delta;T\&Delta;f}/f_s)}\right\}.$

Between Δ t Liang Ge community time be partially worth, N _fftit is fast Fourier change algorithm, can 128 point quick Fouriers conversion, l(0 or 1) be time slot shared by specific reference signals, Δ T is specific for the time interval between reference signal on two Adjacent resource elements, frequency deviation value between Δ f Shi Liangge community, f _sbe sample rate (such as 1.92MHz), * be conjugate operation.

Suppose in current resource block, there are 4 resource elements with reference signal, define each between phase difference be respectively:

$\left\{\begin{array}{c}\mathrm{\&Delta;}{\mathrm{\&theta;}}_0\left(i\right)=\mathrm{\&theta;}(0,i)-\mathrm{\&theta;}(1,i)\\ \mathrm{\&Delta;}{\mathrm{\&theta;}}_1\left(i\right)=\mathrm{\&theta;}(0,i)-\mathrm{\&theta;}(0,i+1)\\ \mathrm{\&Delta;}{\mathrm{\&theta;}}_2\left(i\right)=\mathrm{\&theta;}(0,i)-\mathrm{\&theta;}(1,i+1)\\ \mathrm{\&Delta;}{\mathrm{\&theta;}}_3\left(i\right)=\mathrm{\&theta;}(1,i)-\mathrm{\&theta;}(0,i+1)\\ \mathrm{\&Delta;}{\mathrm{\&theta;}}_4\left(i\right)=\mathrm{\&theta;}(1,i)-\mathrm{\&theta;}(1,i+1)\\ \mathrm{\&Delta;}{\mathrm{\&theta;}}_5\left(i\right)=\mathrm{\&theta;}(0,i+1)-\mathrm{\&theta;}(1,i+1)\end{array}\right.,i=0,\&CenterDot;\&CenterDot;\&CenterDot;N_{\mathrm{RS}}-2$

Above-mentioned centering, θ (0, i) be measure community a Resource Block on 4 Adjacent resource elements in a resource element on reference signal and the reference signal of strong jamming community between phase difference, all the other are by that analogy.

Step 508, the channel estimation results of Combination selection to and the channel response carrying out measuring community estimate.

Difference between above-mentioned phase difference be more than or equal to preset value such as 90 degree (namely find phase difference value close to 180 degree resource element to) time, using this resource element to the resource element pair as selection, the resource element utilizing these to select, to the channel estimating realized measuring community, obtains for each Resource Block the channel estimation value that is measured community.

If what do not mate in current resource block is right, then performs the special processing procedure being used for adjacent channel and estimating, namely use the channel estimation value of channel estimation value as current resource block of Adjacent resource block.Suppose that Resource Block is 100 pieces, then corresponding channel estimation value has 100, and so get these 100 channel estimation values as the final channel estimation value measuring community, should be understood that the quantity of the Resource Block chosen is more, the channel estimating measuring community is more accurate.

Step 510, according to this formula carry out power calculation.

Step 512, the received power RSRP=10 × log10 (P) of last computing reference signal.

The channel response measuring community is obtained in conjunction with the signal measuring community and interfered cell, in the computational process of channel response, find out the resource element pair of coupling, according to the resource element of pairing on a pair channel estimation results eliminate the impact of interfered cell, thus the channel estimating that demand does not carry out interfered cell just directly can obtain the channel response measuring community, because this reducing computation complexity, and affect removal step itself with certain error due to the channel estimating of strong jamming community and strong jamming community, therefore method of measurement can further improve the precision of channel estimation measuring community according to an embodiment of the invention.

Corresponding to the execution step shown in Fig. 5, then the formation of corresponding terminal as shown in Figure 6.

As shown in Figure 6, terminal 600 comprises according to an embodiment of the invention: reference signal generation unit 602, first channel estimating unit 604, matching unit 606, second channel estimation unit 608 and power determining unit 610, wherein, reference signal generation unit 602, for generating two specific cell reference signals, two specific cell reference signals correspond respectively to the reference signal measuring community and interfered cell; First channel estimating unit 604 is for for each Resource Block at least one Resource Block, according to two specific cell reference signals and the signal received, channel estimating is carried out to each signal had on the resource element of reference signal measuring community, obtains the channel estimation results corresponding with each resource element; Matching unit 606, for matching to the Adjacent resource element with reference signal, obtains at least one resource element pair; Second channel estimation unit 608 for according to at least one resource element to corresponding channel estimation results pair, determine the channel estimation value of each Resource Block, get the mean value of at least one channel estimation value corresponding with at least one Resource Block as the channel estimation value measuring community; Power determining unit 610, determines based on the channel estimation value measuring community the Reference Signal Received Power measuring community.

Wherein, the first channel estimating unit 604 adopts zero forcing algorithm to carry out channel estimating to the reference signal measured on each Adjacent resource element of community:

$r(l,i)x_0^{*}(l,i)=h_0(l,i)+h_1(l,i)x_1(l,i)x_0^{*}(l,i)+n(l,i)x_0^{*}(l,i),$

Wherein, r (l, i) is the signal received, x ₀(l, i) is the reference signal measuring community, x ₁(l, i) is the reference signal of interfered cell, and n (l, i) is noise, and l is OFDM symbol, and i is sub-carrier, h ₀(l, i) is the channel response measuring community, h ₁(l, i) is the channel response of interfered cell.

Further, matching unit 606 can comprise:

Phase difference calculating subelement 6062, for calculating the phase difference between reference signal on each Adjacent resource element and the reference signal of interfered cell; Mathematic interpolation subelement 6064, for for the selected resource element had in the Adjacent resource element of reference signal, calculates the difference between the respective phase difference of selected resource element and the respective phase difference of each other Adjacent resource element; Pairing subelement 6066, for matching the Adjacent resource element matched with selected resource element according to difference.Particularly, matching unit 606 when difference is more than or equal to preset value, using selected resource element and other corresponding Adjacent resource elements as resource element pair.

Phase difference calculating subelement 6062 is also for according to the hour offset measured between the reference signal of community and the reference signal of interfered cell and the reference signal frequently on each Adjacent resource element of offset correction and the phase difference between the reference signal of interfered cell.

Wherein, phase difference determined between reference signal on each resource element and the reference signal of interfered cell according to following phase calculation formula by phase difference calculating subelement 6062:

$\mathrm{\&theta;}(l,i)=\mathrm{phase}\left\{x_1(l,i)x_0^{*}(l,i)e^{j2\mathrm{\&pi;}(\mathrm{i\&Delta;t}/N_{\mathrm{FFT}}+\mathrm{l\&Delta;T\&Delta;f}/f_s)}\right\},$

Wherein, l is OFDM symbol, and i is sub-carrier, and θ (l, i) is phase difference, x ₁(l, i) is the reference signal of interfered cell, x ₀(l, i) is the reference signal measuring community, f _sbe sample rate, Δ f is frequency offset value, and Δ t is hour offset value, N _fFTbe Fourier transform data volume size, Δ T is the time difference between the reference signal on selected resource element and other Adjacent resource elements, and phase{} is phase function.

Second channel estimation unit 608, also for when matching multipair resource element pair for a Resource Block, according to multipair resource element to determining multiple channel estimation value, gets the mean value of multiple channel estimation value as the channel estimation value corresponding with a Resource Block.

When second channel estimation unit 608 also for not matching the resource element mated with selected resource element in other Adjacent resource elements, using the channel estimation value on Adjacent resource block after weighting process as the channel estimation value corresponding with current resource block.

Reference signal generation unit 602, also for when the number of cells of interferometry community is greater than two, chooses the reference signal of reference signal as described interfered cell of a prominent community from the community of interference.The reference signal of reference signal as interfered cell of one of them community can certainly be chosen at random.

Fig. 7 shows the block diagram of system according to an embodiment of the invention.

As shown in Figure 7, the invention allows for a kind of system 700, comprise base station 702, and terminal 600 as shown in Figure 6.

In addition, the invention allows for a kind of machine readable program (not shown), wherein when performing described program in a base station, it is as above for determining the method for Reference Signal Received Power that described program makes machine perform in described base station.

Present invention also offers a kind of storage medium (not shown) storing machine readable program, wherein said machine readable program makes machine perform in the terminal as described above for determining the method for Reference Signal Received Power.

Present invention also offers a kind of program product (not shown) be stored in nonvolatile machine-readable media, for determining Reference Signal Received Power, described program product comprises the machine-executable instruction for making computer system perform following steps: generate two specific cell reference signals, and described two specific cell reference signals correspond respectively to the reference signal measuring community and interfered cell; For each Resource Block at least one Resource Block of described measurement community, according to described two specific cell reference signals and the signal received, channel estimating is carried out to signal had on the resource element of reference signal each in described Resource Block, obtains the channel estimation results corresponding with each described resource element; The Adjacent resource element with reference signal is matched, obtains at least one resource element pair mated; According to at least one resource element described to corresponding channel estimation results pair, determine the channel estimation value of each Resource Block described, get the channel estimation value of mean value as described measurement community of at least one channel estimation value corresponding with at least one Resource Block described; Channel estimation value based on described measurement community determines the Reference Signal Received Power of described measurement community.

Present invention also offers a kind of non-volatile machine readable media (not shown), store the program product for determining Reference Signal Received Power, described program product comprises the machine-executable instruction for making computer system perform following steps: generate two specific cell reference signals, and described two specific cell reference signals correspond respectively to the reference signal measuring community and interfered cell; For each Resource Block at least one Resource Block of described measurement community, according to described two specific cell reference signals and the signal received, channel estimating is carried out to signal had on the resource element of reference signal each in described Resource Block, obtains the channel estimation results corresponding with each described resource element; The Adjacent resource element with reference signal is matched, obtains at least one resource element pair mated; According to at least one resource element described to corresponding channel estimation results pair, determine the channel estimation value of each Resource Block described, get the channel estimation value of mean value as described measurement community of at least one channel estimation value corresponding with at least one Resource Block described; Channel estimation value based on described measurement community determines the Reference Signal Received Power of described measurement community.

The present invention combines the signal measuring community and interfered cell and obtains the channel response measuring community, in the computational process of channel response, find out the resource element pair of coupling, according to the resource element of pairing on a pair channel estimation results eliminate the impact of interfered cell, thus the channel estimating that demand does not carry out interfered cell just directly can obtain the channel response measuring community, because this reducing computation complexity, and affect removal step itself with certain error due to the channel estimating of strong jamming community and strong jamming community, therefore method of measurement can further improve the precision of channel estimation measuring community according to an embodiment of the invention.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (19)

1., for determining a method for Reference Signal Received Power, comprising:

Generate two specific cell reference signals, described two specific cell reference signals correspond respectively to the reference signal measuring community and interfered cell;

For each Resource Block at least one Resource Block of described measurement community, according to described two specific cell reference signals and the signal received, channel estimating is carried out to signal had on the Adjacent resource element of reference signal each in described Resource Block, obtains the channel estimation results corresponding with each Adjacent resource element;

The Adjacent resource element with reference signal is matched, obtains at least one resource element pair mated;

According to at least one resource element described to corresponding channel estimation results pair, determine the channel estimation value of each Resource Block described, get the channel estimation value of mean value as described measurement community of at least one channel estimation value corresponding with at least one Resource Block described;

Channel estimation value based on described measurement community determines the Reference Signal Received Power of described measurement community.

2. method according to claim 1, the described Adjacent resource element to having reference signal matches, and the right step of at least one resource element obtaining mating comprises:

Reference signal on calculating Adjacent resource element described in each and the phase difference between the reference signal of described interfered cell;

According to the phase difference of each Adjacent resource element, the described Adjacent resource element with reference signal is compared between two, obtains the phase difference difference of every a pair Adjacent resource element;

The Adjacent resource element matched is determined according to described phase difference difference.

3. method according to claim 2, is more than or equal to the resource element of preset value to the resource element pair as described coupling using described phase difference difference.

4. method according to claim 2, if match multipair described resource element pair for a Resource Block, then according to multipair described resource element to determining multiple channel estimation value, get the mean value of multiple described channel estimation value as the channel estimation value corresponding with a described Resource Block.

5. method according to claim 2, according to the hour offset between the reference signal of described measurement community and the reference signal of described interfered cell and the reference signal frequently on offset correction Adjacent resource element described in each and the phase difference between the reference signal of described interfered cell.

6. method according to claim 5, determine the phase difference between reference signal on Adjacent resource element described in each and the reference signal of described interfered cell according to following phase calculation formula:

Wherein, l is OFDM symbol, and i is sub-carrier, and θ (l, i) is described phase difference, x ₁(l, i) is the reference signal of described interfered cell, x ₀(l, i) is the reference signal of described measurement community, f _sbe sample rate, Δ f is frequency offset value, and Δ t is hour offset value, N _fFTbe Fourier transform data volume size, Δ T is the time difference between the reference signal on two Adjacent resource elements, and phase{} is phase function.

7. method according to claim 2, if do not match resource element pair in described Adjacent resource element, then using the channel estimation value on Adjacent resource block after weighting process as the channel estimation value corresponding with current resource block.

8. method according to claim 1, adopt zero forcing algorithm to described measurement community each described in reference signal on Adjacent resource element carry out channel estimating:

Wherein, r (l, i) be described in the signal that receives, x ₀(l, i) is the reference signal of described measurement community, x ₁(l, i) is the reference signal of described interfered cell, and n (l, i) is noise, and l is OFDM symbol, and i is sub-carrier, h ₀(l, i) is the channel response of described measurement community, h ₁(l, i) is the channel response of described interfered cell.

9. method according to any one of claim 1 to 8, also comprises:

Some number of cells of disturbing described measurement community are greater than two, then from the community of interference, choose the reference signal of reference signal as described interfered cell of a prominent community.

10. a terminal, is characterized in that, comprising:

Reference signal generation unit, for generating two specific cell reference signals, described two specific cell reference signals correspond respectively to the reference signal measuring community and interfered cell;

First channel estimating unit, for each Resource Block at least one Resource Block for described measurement community, according to described two specific cell reference signals and the signal received, channel estimating is carried out to signal had on the Adjacent resource element of reference signal each in described Resource Block, obtains the channel estimation results corresponding with each Adjacent resource element;

Matching unit, for matching to the Adjacent resource element with reference signal, obtains at least one resource element pair mated;

Second channel estimation unit, for according to at least one resource element described to corresponding channel estimation results pair, determine the channel estimation value of each Resource Block described, get the channel estimation value of mean value as described measurement community of at least one channel estimation value corresponding with at least one Resource Block described;

Power determining unit, the channel estimation value based on described measurement community determines the Reference Signal Received Power of described measurement community.

11. terminals according to claim 10, is characterized in that, described matching unit comprises:

Phase difference calculating subelement, for calculating the phase difference between reference signal on Adjacent resource element described in each and the reference signal of described interfered cell;

Mathematic interpolation subelement, for the phase difference according to each Adjacent resource element, compares between two the described Adjacent resource element with reference signal, obtains the phase difference difference of every a pair Adjacent resource element;

Pairing subelement, for determining the Adjacent resource element matched according to described phase difference difference.

12. terminals according to claim 11, is characterized in that, described phase difference difference is more than or equal to the resource element of preset value to the resource element pair as described coupling by described matching unit.

13. terminals according to claim 11, it is characterized in that, described second channel estimation unit is also for when matching multipair described resource element pair for a Resource Block, according to multipair described resource element to determining multiple channel estimation value, get the mean value of multiple described channel estimation value as the channel estimation value corresponding with a described Resource Block.

14. terminals according to claim 11, it is characterized in that, described phase difference calculating subelement is also for according to the hour offset between the reference signal of described measurement community and the reference signal of described interfered cell and the reference signal frequently on offset correction Adjacent resource element described in each and the phase difference between the reference signal of described interfered cell.

15. terminal according to claim 14, is characterized in that, described phase difference calculating subelement determines the phase difference between reference signal on Adjacent resource element described in each and the reference signal of described interfered cell according to following phase calculation formula:

Wherein, l is OFDM symbol, and i is sub-carrier, and θ (l, i) is described phase difference, x ₁(l, i) is the reference signal of described interfered cell, x ₀(l, i) is the reference signal of described measurement community, f _sbe sample rate, Δ f is frequency offset value, and Δ t is hour offset value, N _fFTbe Fourier transform data volume size, Δ T is the time difference between the reference signal on two Adjacent resource elements, and phase{} is phase function.

16. terminals according to claim 11, it is characterized in that, when described second channel estimation unit also for not matching resource element pair in described Adjacent resource element, using the channel estimation value on Adjacent resource block after weighting process as the channel estimation value corresponding with current resource block.

17. terminals according to claim 10, is characterized in that, described first channel estimating unit adopt zero forcing algorithm to described measurement community each described in reference signal on Adjacent resource element carry out channel estimating:

Wherein, r (l, i) be described in the signal that receives, x ₀(l, i) is the reference signal of described measurement community, x ₁(l, i) is the reference signal of described interfered cell, and n (l, i) is noise, and l is OFDM symbol, and i is sub-carrier, h ₀(l, i) is the channel response of described measurement community, h ₁(l, i) is the channel response of described interfered cell.

18. according to claim 10 to the terminal according to any one of 17, it is characterized in that, described reference signal generation unit, also for when disturbing the number of cells of described measurement community to be greater than two, chooses the reference signal of reference signal as described interfered cell of a prominent community from the community of interference.

19. 1 kinds of systems, is characterized in that, comprise base station and the terminal according to any one of claim 10 to 18.