CN102421163A - Method and device for sequencing frequency points of LTE (Long Term Evolution) system - Google Patents

Abstract

The embodiment of the invention discloses a method and device for sequencing frequency points of an LTE (Long Term Evolution) system, relating to the field of communication and being capable of realizing the rapid sequencing of the frequency points of the LET system and increasing sequencing accuracy. The method disclosed by the invention comprises the steps of: acquiring filter data of preset frequency bands; determining bandwidth enabling signs of the frequency bands corresponding to the filter data, and merging the frequency bands corresponding to the filter data according to the bandwidth enabling signs to obtain a merged frequency band, wherein the bandwidth enabling signs are true or false; acquiring signal power at each frequency grid inside the frequency bands corresponding to the filter data; calculating a power window specific value at each frequency point inside the merged bandwidth according to the merged frequency band and the signal power at the frequency grids; and sequencing the frequency points according to the magnitudes of the power window specific values correspondingly. The embodiment of the invention is mainly applied in a process for sequencing the frequency points of the LTE system.

Description

The method and the device of the frequency ordering of LTE system

Technical field

The present invention relates to the communications field, relate in particular to the method and the device of a kind of LTE system frequency ordering.

Background technology

After starting shooting first or lose network signal in the terminal; Needing to attempt the search proper cell carries out resident; And the search suitable cell at first to know current all have the center frequency point of sub-district; And then to choose the stronger center frequency point corresponding district of power be the terminal proper cell, realizes through the frequency sorting operation and choose the stronger center frequency point corresponding district of power.

For 3G (3rd-generation; The 3G (Third Generation) Moblie technology) GSM; Its bandwidth is fixed; Use traditional center frequency point searching method just to be easy to realize search and ordering, for example adopt the center frequency point of the sub-district in the method search 3G GSM of attempting according to bandwidth of cell center frequency point; And, also not have the corresponding method that LTE system frequency is sorted at present for the system of this frequency band broad of LTE (Long Term Evolution, Long Term Evolution) system and adaptive-bandwidth.

Summary of the invention

Embodiments of the invention provide the method and the device of a kind of LTE system frequency ordering, improve the accuracy of ordering when can realize the quicksort of LTE system frequency.

For achieving the above object, embodiments of the invention adopt following technical scheme:

The method of a kind of LTE system frequency ordering comprises:

Obtain the filtering data of predetermined frequency band;

Confirm the bandwidth enabler flags of the corresponding frequency band of said filtering data, and according to said bandwidth enabler flags the corresponding frequency band of said filtering data merged and to obtain merging frequency band that said bandwidth enabler flags is true or non-true;

Obtain the signal power at each frequency grid place in the corresponding frequency band of said filtering data;

According to the signal power at said merging frequency band and said frequency grid place, calculate the power window ratio at each frequency place in the said merging bandwidth;

Big young pathbreaker's frequency points corresponding according to said power window ratio sorts.

The device of a kind of LTE system frequency ordering comprises:

First acquiring unit is used to obtain the filtering data of predetermined frequency band;

Confirm the unit, the bandwidth enabler flags of the corresponding frequency band of said filtering data that is used for confirming that said first acquiring unit obtains, said bandwidth enabler flags is true or non-true;

Merge cells is used for confirming according to said definite unit that said bandwidth enabler flags merges the corresponding frequency band of said filtering data and obtains merging frequency band;

Second acquisition unit is used to obtain the signal power at each frequency grid place in the corresponding frequency band of said filtering data;

Computing unit, the signal power at the said frequency grid place that said merging frequency band that is used for obtaining according to said merge cells and said second acquisition unit obtain is calculated the power window ratio at each frequency place in the said merging bandwidth;

Sequencing unit, big young pathbreaker's frequency points corresponding of the said power window ratio that is used for obtaining according to said computing unit sorts.

The technical scheme that the embodiment of the invention provides; Signal power according to said merging frequency band and said frequency grid place; Calculate the power window ratio at each frequency place in the said merging bandwidth; And sort, thereby realize the quicksort of LTE system frequency according to big young pathbreaker's frequency points corresponding of said power window ratio; And, therefore improved the accuracy of frequency ordering because the ordering of frequency band is based on power window ratio.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the method flow diagram of LTE system frequency ordering in one embodiment of the present of invention;

Fig. 2 is a method flow diagram of confirming the bandwidth enabler flags of the corresponding frequency band of filtering data in one embodiment of the present of invention;

Fig. 3 is for obtaining the method flow diagram of the signal power at each frequency grid place in the corresponding frequency band of filtering data in one embodiment of the present of invention;

Fig. 4 calculates the method flow diagram that merges the power window ratio at each frequency place in the bandwidth in one embodiment of the present of invention;

Fig. 5 is the device composition frame chart of a kind of LTE system frequency ordering among another embodiment of the present invention;

Fig. 6 is the device composition frame chart of another kind of LTE system frequency ordering among another embodiment of the present invention;

Fig. 7 is the device composition frame chart of another kind of LTE system frequency ordering among another embodiment of the present invention;

Fig. 8 is the device composition frame chart of another kind of LTE system frequency ordering among another embodiment of the present invention;

Fig. 9 is the device composition frame chart of another kind of LTE system frequency ordering among another embodiment of the present invention;

Figure 10 is the device composition frame chart of another kind of LTE system frequency ordering among another embodiment of the present invention.

Embodiment

To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.

Passing through HSDPA (High Speed Downlink Packet Access; The high speed downlink packet access), HSUPA (high speed uplink packet access; High Speed Uplink Packet inserts) and HSPA+ (high speed downlink packet access technology; High Speed Downlink Packet Access) after a series of evolution; 3GPP (3rd Generation Partnership Project, third generation partner program) has started the LTE plan of UMTS (Universal Mobile Telecommunications System, UMTS) technology.Brand-new wireless air interface and various advanced persons' technology have been introduced in this LTE plan, make the bigger transmission rate of LTE system support, littler access delay and bigger power system capacity.There are TDD (Time Division Duplex, time division duplex) and two kinds of patterns of FDD (FrequencyDivision Duplex, FDD) in the LTE system; For narrating conveniently; If no specified otherwise, the embodiment of the invention is an example with the tdd mode, sets forth the method for this LTE system frequency ordering.

One embodiment of the present of invention provide the method for a kind of LTE system frequency ordering, and are as shown in Figure 1, comprising:

101, obtain the filtering data of predetermined frequency band.

Wherein, the filtering data that obtains predetermined frequency band can adopt any method of the prior art to obtain, and the embodiment of the invention does not limit this; For example, can obtain the filtering data of predetermined frequency band through filter, as; Obtain the filtering data that transmission band is 2300MHz～2400MHz; Can know to the frequency band table that tdd mode distributes down that according to 3GPP frequency band number is that 40 transmission band is 2300MHz～2400MHz, and frequency band number is that 40 minimum bandwidths supported are 5MHz; So the bandwidth of low pass filter is set to 5MHz, just can obtain the filtering data that transmission band is 2300MHz～2400MHz.

102, confirm the bandwidth enabler flags of the corresponding frequency band of said filtering data, and according to said bandwidth enabler flags the corresponding frequency band of said filtering data merged and to obtain merging frequency band that said bandwidth enabler flags is true or non-true.

Wherein, whether available this bandwidth enabler flags be this frequency band sign, when said bandwidth enabler flags is a true time, shows that this frequency band is the frequency band that has signal power, and this frequency band that has signal power is available frequency band for user terminal; When said bandwidth enabler flags is non-true time, show this frequency band for there not being the frequency band of signal power, this frequency band that does not have signal power is disabled frequency band for user terminal.The bandwidth enabler flags of concrete definite said filtering data correspondence frequency band can adopt but is not limited to following method, and as shown in Figure 2, this method comprises:

1021, with the RSSI (Received SignalStrength Indication receives the signal strength signal intensity indication) of the corresponding frequency band of the said filtering data of predetermined unit length computation.

Wherein, the realization of this RSSI is carried out after backward channel base band receiving filter, through the size measurement signaling point of RSSI and the distance of acceptance point.In the embodiment of the invention, be 5ms with the data length of said filtering data, frequency band is that frequency band number is 40 frequency band, and the sampled point number is 38400 to be example, specifically sets forth this method.Wherein, Frequency band number is that 40 frequency band comprises 951 center frequency point (2302.5MHz is first center frequency point, and every then interval 100KHz just might be a center frequency point, so last center frequency point is 2397.5MHz) altogether; The embodiment of the invention specifically is the filtering data of the 5ms of 2302.5MHz with the center frequency point; And be that unit calculates this RSSI with the length of OFDM symbol, frequency band number is that 40 minimum bandwidths supported are 5MHz, and the symbol lengths of the bandwidth OFDM of 5MHz is 512; Therefore be the RSSI that unit calculates the corresponding frequency band of this filtering data with 512, obtain 38400/512=75 RSSI altogether.

1022, from the said RSS I that calculates, choose maximum said RSSI as RSSI relatively, perhaps obtain the mean value of the said RSSI that calculates, and will said average RSSI as comparison RSSI.

Wherein, described in step 1021 512 to be the RSSI that unit calculates the corresponding frequency band of this filtering data, obtain 75 RSSI altogether; Can choose maximum said RSSI as RSSI relatively from 75 RSSI in this step, also can calculate the mean value of said 75 RSSI, and will said average RSSI as comparison RSSI; Concrete which value of using is as said relatively RSSI, and the embodiment of the invention does not limit this.

1023, said relatively RSSI is compared with predetermined RSSI threshold value; If said relatively RSSI is greater than said predetermined RSSI threshold value, then execution in step 1024; If said relatively RSSI is less than or equal to said predetermined RSSI threshold value, then execution in step 1025.

Wherein, said predetermined RSSI threshold value is an empirical value, and it is according to the sensitivity setting of receiver.

1024, the bandwidth enabler flags of confirming the corresponding frequency band of said filtering data shows that for true this frequency band is the frequency band that has signal power, and this frequency band that has signal power is available frequency band for user terminal.

1025, the bandwidth enabler flags of confirming the corresponding frequency band of said filtering data is non-true, shows this frequency band for there not being the frequency band of signal power, and the frequency band that for user terminal, does not have signal power is disabled frequency band.

Wherein, the said corresponding frequency band of said filtering data the merging according to said bandwidth enabler flags obtains merging frequency band, comprising:

With the bandwidth enabler flags be continuously genuine frequency band and with said continuously for the adjacent non-genuine frequency band of genuine frequency band merges, obtain said merging bandwidth.The embodiment of the invention is an example with the corresponding bandwidth enabler flags of 10 frequency bands specifically, the concrete formation of showing the merging bandwidth, and shown in the bandwidth enabler flags table 1 specific as follows of these 10 frequency bands correspondences, table 1 is:

Frequency band number	1	2	3	4	5	6	7	8	9	10
											The bandwidth enabler flags	Non-true	Non-true	Very	Very	Non-true	Non-true	Non-true	Very	Non-true	Non-true

According to the record of last table, be that 2,3,4,5 frequency band merges with frequency band number, obtain merging bandwidth 1 (CmbBand1); With frequency band number is that 7,8,9 frequency band merges, and obtains merging bandwidth 2 (CmbBand2).

103, obtain the signal power at each frequency grid place in the corresponding frequency band of said filtering data.

Wherein, can adopt when obtaining the signal power at each frequency grid place in the corresponding frequency band of said filtering data but be not limited to following method, as shown in Figure 3, this method comprises:

1031, according to preset frequency said filtering data is sampled, obtain sampled data.

Wherein, the embodiment of the invention is that 7.68MHz is that example is sampled to filtering data with the sample frequency, is that 40 filtering data is sampled according to the sample frequency of 7.68MHz for frequency band number then, obtains comprising the sampled data of 38400 sampled points.

1032, according to predetermined length said sampled data is carried out segmentation, and calculate the periodogram of each block sampling data; This predetermined length can be set by the user, and the embodiment of the invention is an example with 64, and the sampled data that will comprise 38400 sampled points in the embodiment of the invention is carried out segmentation, and calculates the periodogram of each block sampling data.

At first, according to predetermined length said sampled data is carried out segmentation and can obtain through formula 1.1, common property is given birth to K=1199 segmentation, and the length of each segmentation is M=64, overlap length be 2; Formula 1.1 is:

${\stackrel{\·\·}{e}}_r\left(n\right)=\stackrel{\·\·}{e}(r\·R+n),0\≤n\≤M-1---\left(0.1\right)$

Wherein, is for receiving r segmentation of data; R is its value 0 of fragment sequence number; 1 ... K-1, n are the data sequence number in the segmentation,

be the 5ms reception data behind the LPF.

Secondly, the periodogram that calculates each block sampling data can obtain through formula 1.2, and formula 1.2 is:

I _r＝[I _r(0)，I _r(1)，...，I _r(M-1)] ^T (0.2)

Wherein, I _rBe the periodogram of r segmentation, wherein, r=0,1 ..., K-1; I _r(i) be the power at i spectral resolution place in r the periodogram, it can obtain through formula 1.3, and formula 1.3 is:

I _r(i)＝|g _r(i)| ² (0.3)

Wherein, g _r(i) be FFT (Fast Fourier Transform, the FFT) conversion of r segmentation, be expressed as formula 1.4,0≤i≤M-1, said formula 1.4 is:

$g_r=\mathrm{FFT}\left({\stackrel{\·\·}{e}}_r\right)---\left(0.4\right)$

1033, according to predetermined quantity said periodogram is divided into groups, and calculate figure average period of each grouping.

Wherein, Said predetermined quantity is an empirical value; The user can rule of thumb be provided with; The embodiment of the invention does not limit this, the convenience of the embodiment of the invention in order to explain, and this predetermined quantity is set to L; Then a said K periodogram is divided into groups, obtain

according to predetermined quantity individual periodogram grouping; Figure average period

that calculates each grouping is when calculating figure average period

of this each grouping; Can realize that this formula 1.5 is through following formula 1.5:

Wherein, j is that 0≤j≤M-1, r are fragment sequence number, I _r(j) be the power at j spectral resolution place in r the periodogram.

1034, obtain all groupings average period corresponding frequency position among the figure maximum, the order ascending according to frequency sorts, and obtains the power spectrum at each discrete frequency place successively.

In the embodiment of the invention; Each average period of dividing into groups of obtaining corresponding frequency position among the figure maximum; And reorder by the frequency domain indexed sequential, obtain M point power spectrum and estimate.

1035, with the power of the immediate frequency domain position of frequency domain position of each frequency grid in said spectrum estimation frequency domain position and the corresponding frequency band of said filtering data, as the signal power of each frequency grid in the corresponding frequency band of said filtering data.

Further preferred, execution in step 1032 according to predetermined length said sampled data is carried out segmentation after, this method also comprises:

Sampled data after each segmentation is carried out windowing process, obtain the segmentation after the windowing, this segmentation can be obtained through formula 1.6, and formula 1.6 is:

${\stackrel{\·\·}{e}}_r\left(n\right)=\stackrel{\·\·}{e}(\mathrm{rR}+n)\·w\left(n\right),0\≤n\≤M-1---\left(1.6\right)$

Wherein, w (n) is the window function coefficient.

The periodogram of each block sampling data of said calculating is: the periodogram that calculates the sampled data of windowing after each segmentation.

104,, calculate the power window ratio at each frequency place in the said merging bandwidth according to the signal power at said merging frequency band and said frequency grid place.

Said signal power according to said merging frequency band and said frequency grid place is calculated the power window ratio at each frequency place in the said merging bandwidth, and as shown in Figure 4, this method comprises:

1041, calculate corresponding merging frequency band according to said merging frequency band.

Wherein, said merging frequency band according to said merging frequency band calculating correspondence can obtain through following formula 1.7, and formula 1.7 is:

BW _cmb，i＝BW _raster*N _P，i (1.7)

Wherein, BW _RasterBe grid size, the LTE agreement is defined as 100KHz, N _{P, i}The frequency grid number that comprises for the tape merge frequency band, wherein, i=0,1 ..., N _Cmb-1.

1042, the power window ratio at each frequency place comprises in the said merging bandwidth of calculating:

The power window ratio of the frequency in each one of two parts system bandwidth of said merging frequency band both sides is set to 0, promptly works as

Or

The time, i merge in the frequency band, system bandwidth is BW _{Sys, k}, k=1 .., N _Sys, center frequency point is numbered the corresponding power window ratio of j

With the frequency the frequency in one of each two parts of said merging frequency band both sides system bandwidth in the said merging frequency band; The frequency that (merges and remove the possible center frequency point numbering that merges outside the frequency of frequency band both sides in the bandwidth) as

; Can calculate the power window ratio of said frequency according to formula 1.8, this formula 1.8 is:

$\widetilde{\mathrm{\ρ}}(i,j,k)=\frac{\left(\underset{n=1}{\overset{\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{\mathrm{BW}}_{\mathrm{raster}}}-2}{\mathrm{\Σ}}}{p}_{\mathrm{cmb}}(i,j-\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{2\mathrm{BW}}_{\mathrm{raster}}}+n)\right)/(\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{\mathrm{BW}}_{\mathrm{raster}}}-2)}{(p_{\mathrm{cmb}}(i,j-\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{2B{W}_{\mathrm{raster}}})+p_{\mathrm{cmb}}(i,j+\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{2{\mathrm{BW}}_{\mathrm{raster}}}-1))/2}---\left(1.8\right)$

Wherein, i merges frequency band number, and j is the center frequency point numbering that merges in the frequency band, and k is the system bandwidth numbering, BW _{Sys, k}Be the system bandwidth size that is numbered k, BW _RasterBe grid size, p _Cmb(i j) is i power that merges j center frequency point in the frequency band.

Further preferred, after execution in step 1041 was calculated corresponding merging bandwidth according to said merging frequency band, this method also comprised:

Confirm that whether said merging bandwidth is more than or equal to system bandwidth; If said merging bandwidth, is then carried out the power window ratio that said step 1042 is calculated each frequency place in the said merging bandwidth more than or equal to said system bandwidth; If said merging bandwidth less than said system bandwidth, then finishes the execution of the embodiment of the invention.

105, the big young pathbreaker's frequency points corresponding according to said power window ratio sorts.

Here need to prove; When embodiment of the present invention embodiment; The said bandwidth enabler flags of confirming the corresponding frequency band of said filtering data; And the corresponding frequency band of said filtering data is merged the step that obtains merging frequency band, and the said step of obtaining the signal power at each frequency grid place in the corresponding frequency band of the said filtering data branch of priority not according to said bandwidth enabler flags; The embodiment of the invention is described for ease; With the said bandwidth enabler flags of confirming the corresponding frequency band of said filtering data; And according to said bandwidth enabler flags the corresponding frequency band of said filtering data is merged the step that obtains merging frequency band and be placed in the step 102 and describe, the said step of the signal power at each frequency grid place of obtaining in the corresponding frequency band of said filtering data is placed in the step 103 and describes.

In the embodiment of the invention; In the time need sorting to the frequency of LTE system, choosing is calculated the power window ratio at each frequency place in the said merging bandwidth according to the signal power at said merging frequency band and said frequency grid place; And sort according to big young pathbreaker's frequency points corresponding of said power window ratio; Thereby realize the quicksort of LTE system frequency, and, therefore improved the accuracy of frequency ordering because the ordering of frequency band is based on power window ratio.

And; In the embodiment of the invention; When confirming the bandwidth enabler flags of the corresponding frequency band of filtering data, can compare with predetermined RSSI threshold value according to the RSSI of the maximum among the RSSI that calculates, determine whether that the bandwidth enabler flags of the corresponding frequency band of said filtering data is set to very; Because the channel performance of the frequency band that maximum RSSI is corresponding is relatively good, has guaranteed the accuracy of definite available band, thereby further improved the accuracy of LTE system frequency ordering.

Further; In the embodiment of the invention, in calculating the corresponding frequency band of said filtering data, during the signal power at each frequency grid place, be to obtain through the method for periodogram; Calculating based on periodogram is simple, thereby the amount of calculation of LTE system frequency ordering is reduced.

Another embodiment of the present invention also provides the device of a kind of LTE system frequency ordering, and as shown in Figure 5, this device comprises: first acquiring unit 21, confirm unit 22, merge cells 23, second acquisition unit 24, computing unit 25 and sequencing unit 26.

First acquiring unit 21 is used to obtain the filtering data of predetermined frequency band; Wherein, said first acquiring unit can be filter, but the embodiment of the invention do not limit this, no matter as long as be the filtering data what equipment can obtain predetermined frequency band.As; Obtain the filtering data that transmission band is 2300MHz～2400MHz; Can know to the frequency band table that tdd mode distributes down that according to 3GPP frequency band number is that 40 transmission band is 2300MHz～2400MHz, and frequency band number is that 40 minimum bandwidths supported are 5MHz; So the bandwidth of low pass filter is set to 5MHz, just can obtain the filtering data that transmission band is 2300MHz～2400MHz.

Confirm unit 22, the bandwidth enabler flags of the corresponding frequency band of said filtering data that is used for confirming that said first acquiring unit 21 obtains, said bandwidth enabler flags is true or non-true; Wherein, whether available this bandwidth enabler flags be this frequency band sign, when said bandwidth enabler flags is a true time, shows that this frequency band is the frequency band that has signal power, and this frequency band that has signal power is available frequency band for user terminal; When said bandwidth enabler flags is non-true time, show this frequency band for there not being the frequency band of signal power, this frequency band that does not have signal power is disabled frequency band for user terminal.

Merge cells 23 is used for confirming according to said definite unit 22 that said bandwidth enabler flags merges the corresponding frequency band of said filtering data and obtains merging frequency band; Wherein, Confirm that according to said definite unit 22 said bandwidth enabler flags merges the corresponding frequency band of said filtering data when obtaining merging frequency band at said merge cells 23; Specifically can through but be not limited to following method and obtain; This method comprises: the bandwidth enabler flags continuously for genuine frequency band and with said continuous in the adjacent non-genuine frequency band of genuine frequency band merges, is obtained said merging bandwidth.

Second acquisition unit 24 is used to obtain the signal power at each frequency grid place in the corresponding frequency band of said filtering data;

Computing unit 25, the signal power at the said frequency grid place that said merging frequency band that is used for obtaining according to said merge cells 23 and said second acquisition unit 24 obtain is calculated the power window ratio at each frequency place in the said merging bandwidth;

Sequencing unit 26, big young pathbreaker's frequency points corresponding of the said power window ratio that is used for obtaining according to said computing unit 25 sorts.

Further, as shown in Figure 6, said definite unit 22 comprises: first computing module 221, first acquisition module 222, comparison module 223 and first determination module 224.

First computing module 221 is used for the RSSI with the corresponding frequency band of the said filtering data of predetermined unit length computation; Wherein, the realization of this RSSI is carried out after backward channel base band receiving filter, through the size measurement signaling point of RSSI and the distance of acceptance point.In the embodiment of the invention, be 5ms with the data length of said filtering data, frequency band is that frequency band number is 40 frequency band, and the sampled point number is 38400 to be example, specifically sets forth this method.Wherein, Frequency band number is that 40 frequency band comprises 951 center frequency point (2302.5MHz is first center frequency point, and every then interval 100KHz just might be a center frequency point, so last center frequency point is 2397.5MHz) altogether; The embodiment of the invention specifically is the filtering data of the 5ms of 2302.5MHz with the center frequency point; And be that unit calculates this RSSI with the length of OFDM symbol, frequency band number is that 40 minimum bandwidths supported are 5MHz, and the symbol lengths of the bandwidth OFDM of 5MHz is 512; Therefore be the RSSI that unit calculates the corresponding frequency band of this filtering data with 512, obtain 38400/512=75 RSSI altogether.

First acquisition module 222 is used for choosing maximum said RSSI as RSSI relatively from the said RSSI that said first computing module 221 calculates, and perhaps obtains the mean value of the said RSSI that calculates, and will said average RSSI as comparison RSSI; Wherein, like first computing module 221 with described 512 to be the RSSI that unit calculates the corresponding frequency band of this filtering data, obtain 75 RSSI altogether; Said first acquisition module 222 can be chosen maximum said RSSI as RSSI relatively from 75 RSSI, also can calculate the mean value of said 75 RSSI, and will said average RSSI as comparison RSSI; Concrete which value of using is as said relatively RSSI, and the embodiment of the invention does not limit this.

Comparison module 223 is used for the said relatively RSSI that said first acquisition module 222 obtains is compared with predetermined RSSI threshold value; Wherein, said predetermined RSSI threshold value is an empirical value, and it is according to its sensitivity setting of filtering.

First determination module 224; Be used at said relatively RSSI during greater than said predetermined RSSI threshold value; The bandwidth enabler flags of confirming the corresponding frequency band of said filtering data is for true; Show that this frequency band is the frequency band that has signal power, this frequency band that has signal power is available frequency band for user terminal.

Said first determination module 225 also is used for; When said relatively RSSI is less than or equal to said predetermined RSSI threshold value; The bandwidth enabler flags of confirming the corresponding frequency band of said filtering data is non-true; Show this frequency band for there not being the frequency band of signal power, the frequency band that for user terminal, does not have signal power is disabled frequency band.

Further, as shown in Figure 7, said second acquisition unit 24 comprises: sampling module 241, second computing module the 242, the 3rd calculate module 243, second acquisition module 244 and the 3rd acquisition module 245.

Sampling module 241 is used for according to preset frequency said filtering data being sampled, and obtains sampled data;

Second computing module 242 is used for according to predetermined length said sampled data being carried out segmentation, and calculates the periodogram of each block sampling data;

The 3rd calculates module 243, is used for according to predetermined quantity said periodogram being divided into groups, and calculates figure average period of each grouping;

Second acquisition module 244 is used for obtaining the maximum of the corresponding frequency of the figure average period position of all groupings, and the order ascending according to frequency sorts, and obtains the power spectrum at each discrete frequency place successively;

The 3rd acquisition module 245; Be used for power, as the signal power of each frequency grid in the corresponding frequency band of said filtering data with the immediate frequency domain position of frequency domain position of each frequency grid in said spectrum estimation frequency domain position and the corresponding frequency band of said filtering data.

Further preferred, as shown in Figure 8, said second acquisition unit 24 also comprises: processing module 246.

Processing module 246 is used for the sampled data after each segmentation is carried out windowing process;

Said second computing module 244 also is used to calculate the periodogram of the sampled data of windowing after each segmentation.

Further, as shown in Figure 9, said computing unit 25 comprises: the 4th computing module 251 and the 5th computing module 252.

The 4th computing module 251 is used for calculating corresponding merging bandwidth according to said merging frequency band;

The 5th computing module 252 is used to calculate the power window ratio at each frequency place in the said merging bandwidth, comprising:

The power window ratio of the frequency in each one of two parts system bandwidth of said merging frequency band both sides is set to 0;

With the frequency the frequency in each one of two parts system bandwidth of said merging frequency band both sides in the said merging frequency band, calculate the power window ratio of said frequency according to following formula, this formula is:

$\widetilde{\mathrm{\ρ}}(i,j,k)=\frac{\left(\underset{n=1}{\overset{\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{\mathrm{BW}}_{\mathrm{raster}}}-2}{\mathrm{\Σ}}}{p}_{\mathrm{cmb}}(i,j-\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{2\mathrm{BW}}_{\mathrm{raster}}}+n)\right)/(\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{\mathrm{BW}}_{\mathrm{raster}}}-2)}{(p_{\mathrm{cmb}}(i,j-\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{2B{W}_{\mathrm{raster}}})+p_{\mathrm{cmb}}(i,j+\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{2{\mathrm{BW}}_{\mathrm{raster}}}-1))/2}$

Wherein, i merges frequency band number, and j is the center frequency point numbering that merges in the frequency band, and k is the system bandwidth numbering, BW _{Sys, k}Be the system bandwidth size that is numbered k, BW _RasterBe grid size, p _Cmb(i j) is i power that merges j center frequency point in the frequency band.。

Further preferred, shown in figure 10, said computing unit 25 also comprises: second determination module 253.

Second determination module 253 is used for after said the 4th computing module 251 calculates corresponding merging bandwidth according to said merging frequency band, confirming that whether said merging bandwidth is more than or equal to system bandwidth;

Said the 5th computing module 252 also is used for, and when said second determination module 253 is confirmed said merging bandwidth more than or equal to said system bandwidth, calculates the power window ratio at each frequency place in the said merging bandwidth.

In the embodiment of the invention; In the time need sorting to the frequency of LTE system; Choosing is according to the signal power at said merging frequency band and said frequency grid place; Calculate the power window ratio at each frequency place in the said merging bandwidth, and sort according to big young pathbreaker's frequency points corresponding of said power window ratio, thus the quicksort of realization LTE system frequency; And, therefore improved the accuracy of frequency ordering because the ordering of frequency band is based on power window ratio.

And; In the embodiment of the invention; When confirming the bandwidth enabler flags of the corresponding frequency band of filtering data, can compare with predetermined RSSI threshold value according to the RSSI of the maximum among the RSSI that calculates, determine whether that the bandwidth enabler flags of the corresponding frequency band of said filtering data is set to very; Because the channel performance of the frequency band that maximum RSSI is corresponding is relatively good, has guaranteed the accuracy of definite available band, thereby further improved the accuracy of LTE system frequency ordering.

Further; In the embodiment of the invention, in calculating the corresponding frequency band of said filtering data, during the signal power at each frequency grid place, be to obtain through the method for periodogram; Calculating based on periodogram is simple, thereby the amount of calculation of LTE system frequency ordering is reduced.

Through the description of above execution mode, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential common hardware, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product, and this computer software product is stored in the storage medium that can read, like the floppy disk of computer; Hard disk or CD etc.; Comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.

The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of said claim.

Claims (14)

1. the method for a LTE system frequency ordering is characterized in that, comprising:

Obtain the filtering data of predetermined frequency band;

Confirm the bandwidth enabler flags of the corresponding frequency band of said filtering data, and according to said bandwidth enabler flags the corresponding frequency band of said filtering data merged and to obtain merging frequency band that said bandwidth enabler flags is true or non-true;

Obtain the signal power at each frequency grid place in the corresponding frequency band of said filtering data;

According to the signal power at said merging frequency band and said frequency grid place, calculate the power window ratio at each frequency place in the said merging bandwidth;

Big young pathbreaker's frequency points corresponding according to said power window ratio sorts.

2. method according to claim 1 is characterized in that, the said bandwidth enabler flags of confirming the corresponding frequency band of said filtering data comprises:

RSSI with the corresponding frequency band of the said filtering data of predetermined unit length computation receives the signal strength signal intensity indication;

From the said RSSI that calculates, choose maximum said RSSI as RSSI relatively, perhaps obtain the mean value of the said RSSI that calculates, and will said average RSSI as comparison RSSI;

Said relatively RSSI is compared with predetermined RSSI threshold value;

If said relatively RSSI greater than said predetermined RSSI threshold value, confirms that then the bandwidth enabler flags of the corresponding frequency band of said filtering data is true;

If said relatively RSSI is less than or equal to said predetermined RSSI threshold value, the bandwidth enabler flags of then confirming the corresponding frequency band of said filtering data is non-true.

3. method according to claim 1 and 2 is characterized in that, the said corresponding frequency band of said filtering data the merging according to said bandwidth enabler flags obtains merging frequency band, comprising:

With the bandwidth enabler flags be continuously genuine frequency band and with said continuously for the adjacent non-genuine frequency band of genuine frequency band merges, obtain said merging frequency band.

4. method according to claim 1 is characterized in that, the said signal power of obtaining each frequency grid place in the corresponding frequency band of said filtering data comprises:

According to preset frequency said filtering data is sampled, obtain sampled data;

According to predetermined length said sampled data is carried out segmentation, and calculate the periodogram of each block sampling data;

According to predetermined quantity said periodogram is divided into groups, and calculate figure average period of each grouping;

Obtain all groupings average period corresponding frequency position among the figure maximum, the order ascending according to frequency sorts, and obtains the power spectrum at each discrete frequency place successively;

With the power of the immediate frequency domain position of frequency domain position of each frequency grid in said spectrum estimation frequency domain position and the corresponding frequency band of said filtering data, as the signal power of each frequency grid in the corresponding frequency band of said filtering data.

5. method according to claim 4 is characterized in that, after according to predetermined length said sampled data being carried out segmentation, this method also comprises:

Sampled data after each segmentation is carried out windowing process;

The periodogram of each block sampling data of said calculating is: the periodogram that calculates the sampled data of windowing after each segmentation.

6. method according to claim 1 is characterized in that, said signal power according to said merging frequency band and said frequency grid place is calculated the power window ratio at each frequency place in the said merging bandwidth, comprising:

Calculate corresponding merging bandwidth according to said merging frequency band;

The power window ratio at each frequency place comprises in the said merging bandwidth of said calculating:

The power window ratio of the frequency in each one of two parts system bandwidth of said merging frequency band both sides is set to 0;

With the frequency the frequency in each one of two parts system bandwidth of said merging frequency band both sides in the said merging frequency band, calculate the power window ratio of said frequency according to following formula, this formula is:

$\widetilde{\mathrm{\ρ}}(i,j,k)=\frac{\left(\underset{n=1}{\overset{\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{\mathrm{BW}}_{\mathrm{raster}}}-2}{\mathrm{\Σ}}}{p}_{\mathrm{cmb}}(i,j-\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{2\mathrm{BW}}_{\mathrm{raster}}}+n)\right)/(\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{\mathrm{BW}}_{\mathrm{raster}}}-2)}{(p_{\mathrm{cmb}}(i,j-\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{2B{W}_{\mathrm{raster}}})+p_{\mathrm{cmb}}(i,j+\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{2{\mathrm{BW}}_{\mathrm{raster}}}-1))/2}$

Wherein, i merges frequency band number, and j is the center frequency point numbering that merges in the frequency band, and k is the system bandwidth numbering, BW _{Sys, k}Be the system bandwidth size that is numbered k, BW _RasterBe grid size, p _Cmb(i j) is i power that merges j center frequency point in the frequency band.

7. method according to claim 6 is characterized in that, after calculating corresponding merging bandwidth according to said merging frequency band, this method also comprises:

Confirm that whether said merging bandwidth is more than or equal to system bandwidth;

If said merging bandwidth, is then carried out the power window ratio at each frequency place in the said merging bandwidth of said calculating more than or equal to said system bandwidth.

8. the device of a LTE system frequency ordering is characterized in that, comprising:

First acquiring unit is used to obtain the filtering data of predetermined frequency band;

Confirm the unit, the bandwidth enabler flags of the corresponding frequency band of said filtering data that is used for confirming that said first acquiring unit obtains, said bandwidth enabler flags is true or non-true;

Merge cells is used for confirming according to said definite unit that said bandwidth enabler flags merges the corresponding frequency band of said filtering data and obtains merging frequency band;

Second acquisition unit is used to obtain the signal power at each frequency grid place in the corresponding frequency band of said filtering data;

Computing unit, the signal power at the said frequency grid place that said merging frequency band that is used for obtaining according to said merge cells and said second acquisition unit obtain is calculated the power window ratio at each frequency place in the said merging bandwidth;

Sequencing unit, big young pathbreaker's frequency points corresponding of the said power window ratio that is used for obtaining according to said computing unit sorts.

9. device according to claim 8 is characterized in that, said definite unit comprises:

First computing module is used for receiving the signal strength signal intensity indication with the RSSI of the corresponding frequency band of the said filtering data of predetermined unit length computation;

First acquisition module is used for choosing maximum said RSSI as RSSI relatively from the said RSSI that said first computing module calculates, and perhaps obtains the mean value of the said RSSI that calculates, and will said average RSSI as comparison RSSI;

Comparison module is used for the said relatively RSSI that said first acquisition module obtains is compared with predetermined RSSI threshold value;

First determination module is used at said relatively RSSI during greater than said predetermined RSSI threshold value, and the bandwidth enabler flags of confirming the corresponding frequency band of said filtering data is for true;

Said first determination module also is used for, and when said relatively RSSI was less than or equal to said predetermined RSSI threshold value, the bandwidth enabler flags of confirming the corresponding frequency band of said filtering data was non-true.

10. according to Claim 8 or 9 described devices, it is characterized in that said merge cells is used for:

With the bandwidth enabler flags be continuously genuine frequency band and with said continuously for the adjacent non-genuine frequency band of genuine frequency band merges, obtain said merging bandwidth.

11. device according to claim 8 is characterized in that, said second acquisition unit comprises:

Sampling module is used for according to preset frequency said filtering data being sampled, and obtains sampled data;

Second computing module is used for according to predetermined length said sampled data being carried out segmentation, and calculates the periodogram of each block sampling data;

The 3rd calculates module, is used for according to predetermined quantity said periodogram being divided into groups, and calculates figure average period of each grouping;

Second acquisition module is used for obtaining the maximum of the corresponding frequency of the figure average period position of all groupings, and the order ascending according to frequency sorts, and obtains the power spectrum at each discrete frequency place successively;

The 3rd acquisition module; Be used for power, as the signal power of each frequency grid in the corresponding frequency band of said filtering data with the immediate frequency domain position of frequency domain position of each frequency grid in said spectrum estimation frequency domain position and the corresponding frequency band of said filtering data.

12. device according to claim 11 is characterized in that, said second acquisition unit also comprises:

Processing module is used for the sampled data after each segmentation is carried out windowing process;

Said second computing module also is used to calculate the periodogram of the sampled data of windowing after each segmentation.

13. device according to claim 8 is characterized in that, said computing unit comprises:

The 4th computing module is used for calculating corresponding merging bandwidth according to said merging frequency band;

The 5th computing module is used to calculate the power window ratio at each frequency place in the said merging bandwidth, comprising:

The power window ratio of the frequency in each one of two parts system bandwidth of said merging frequency band both sides is set to 0;

With the frequency the frequency in each one of two parts system bandwidth of said merging frequency band both sides in the said merging frequency band, calculate the power window ratio of said frequency according to following formula, this formula is:

$\widetilde{\mathrm{\ρ}}(i,j,k)=\frac{\left(\underset{n=1}{\overset{\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{\mathrm{BW}}_{\mathrm{raster}}}-2}{\mathrm{\Σ}}}{p}_{\mathrm{cmb}}(i,j-\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{2\mathrm{BW}}_{\mathrm{raster}}}+n)\right)/(\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{{\mathrm{BW}}_{\mathrm{raster}}}-2)}{(p_{\mathrm{cmb}}(i,j-\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{2B{W}_{\mathrm{raster}}})+p_{\mathrm{cmb}}(i,j+\frac{{\mathrm{BW}}_{\mathrm{sys},k}}{2{\mathrm{BW}}_{\mathrm{raster}}}-1))/2}$

Wherein, i merges frequency band number, and j is the center frequency point numbering that merges in the frequency band, and k is the system bandwidth numbering, BW _{Sys, k}Be the system bandwidth size that is numbered k, BW _RasterBe grid size, p _Cmb(i j) is i power that merges j center frequency point in the frequency band.

14. device according to claim 13 is characterized in that, said computing unit also comprises:

Second determination module is used for after said the 4th computing module calculates corresponding merging bandwidth according to said merging frequency band, confirming that whether said merging bandwidth is more than or equal to system bandwidth;

Said the 5th computing module also is used for, and when said second determination module is confirmed said merging bandwidth more than or equal to said system bandwidth, calculates the power window ratio at each frequency place in the said merging bandwidth.

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