CN102378277B - Method for coordinating high power frequency band in long term evolved system - Google Patents

Abstract

The invention discloses a method for coordinating a high power frequency band in a long term evolved system. The method comprises the following steps of: pre-configuring a number range of a static high-power-frequency-band physical resource block (PRB) of all adjacent cells in a cell group; acquiring quantity demand information of the high-power-frequency-band PRB of the adjacent cells according to the preset policy; determining a number boundary of the high-power-frequency-band PRB of the adjacent cells; adjusting the number boundary of the static high-power-frequency-band PRB of each cell according to the quantity demand information of the high-power-frequency-band PRB of the cell group, the number range information of the static high-power-frequency-band PRB and a pre-set coordination algorithm policy; and informing the corresponding adjacent cell of the adjusted number boundary information of the static high-power-frequency-band PRB of the cell. By the method, the conflicting possibility during setting of the high power frequency band of the edge user of the adjacent cells can be reduced, and the interference coordination performance can be improved.

Description

The method of coordinating high power frequency band in long term evolved system

Technical field

The present invention relates to Long Term Evolution plan (LTE, Long Term Evolved) technology, particularly a kind of method of coordinating high power frequency band in long term evolved system.

Background technology

The LTE technology is the evolution technology of 3G, it improves and has strengthened the aerial access technology of 3G, adopt identical networking, OFDM (OFDM, Orthogonal Frequency DivisionMultiplexing) technology and many inputs and many output (MIMO, Multi-Input andMulti-Output) technology are as its radio network technique.In the LTE system, owing to adopting identical networking, so that the interference ratio that the edge customer between neighbor cell is subject to is larger, because the distance between edge customer and the base station is distant, and signal energy has experienced larger decay in wireless channel, the useful signal intensity that arrives edge customer is smaller simultaneously, cause the signal to noise ratio of Cell Edge User lower, spectrum efficiency obviously descends, and has affected the throughput of edge customer, so that the edge customer communication quality descends.

In the prior art, recently improve the throughput of edge customer by the noise that improves Cell Edge User, be to improve the normal method that adopts of edge customer communication quality in the LTE system, wherein, the co-channel interference that suppresses the minizone is one of main path that improves the Cell Edge User signal to noise ratio.

In the common interference coordination schemes, adopt component frequency (frequency band) multiplexing, it is the part that the edge customer of each residential quarter can only use whole available band, and the frequency band that edge customer uses between the neighbor cell is mutually orthogonal, simultaneously, path loss based on the edge customer signal energy is larger, by the higher transmitting power of the data that will send to edge customer, namely adopt the high power frequency band, and in order to reduce the interference to neighbor cell, with the lower transmitting power of the data that sends to Cell Center User, like this, co-channel interference that can the establishment minizone.In the practical application, the frequency band range of distributing to the edge customer use adopts the principle of static programming usually, the edge customer that is each neighbor cell uses the partial fixing frequency band of planning in advance in the good whole frequency band, and the edge customer frequency band between neighbor cell is mutually orthogonal.

Fig. 1 is the static band plan schematic diagram in three residential quarters in the prior art.Referring to Fig. 1, white, light color, black have represented respectively the LTE system assignment to the edge band of three residential quarters, and the edge band of distributing to each residential quarter is partial fixing frequency band in the whole frequency band and mutually orthogonal.

The static programming scheme of above-mentioned edge band, although co-channel interference that can the establishment minizone, actual loading demand that can not the reflecting edge user.For example, when minizone edge customer load changes, when the edge load of one of them neighbor cell surpasses the static edge band of planning, with the interference that brings inevitably between neighbor cell.This owing to lacking the dynamic coordinate of edge band between neighbor cell, so that the interference coordination effect of minizone is affected, in order further to improve the throughput of edge customer, reduce the phase mutual interference of minizone, further proposed the technical scheme of dynamic interference coordination in the prior art, the below is described.

In the LTE system, realization for the dynamic interference coordination scheme of supporting the minizone, defined by X2 interface in each base station (eNB) transport load information (LoadInformation) message by the LTE protocol specialized, this message provides relative arrowband transmitted power (RNTP, RelativeNarrowband Tx Power) interface parameters, be RNTP message, be used for assisting to transmit between the eNB planning indication information of high power frequency band, thereby help each manufacturer to finish the realization of descending dynamic interference coordination scheme.Definition and the expression formula of RNTP are as follows:

$\mathrm{RNTP}\left(n_{\mathrm{PRB}}\right)=\left\{\begin{array}{cc}0;& \frac{E_A\left(n_{\mathrm{PRB}}\right)}{E_{\max \_\mathrm{nom}}^{\left(p\right)}}\&le;{\mathrm{<figure-callout\; id="1"\; label="RNTP\; threshold"\; filenames="HSA00000242941500022.png"\; state="\{\{state\}\}">RNTP</figure-callout>}}_{\mathrm{threshold}}\\ 1;& \frac{E_A\left(n_{\mathrm{PRB}}\right)}{E_{\max \_\mathrm{nom}}^{\left(p\right)}}>{\mathrm{RNTP}}_{\mathrm{threshold}}\end{array}\right.$

In the formula,

E _A(n _PRB) represent in following a period of time interval energy (EPRE, the Energy Per Resource Element) value of every resource particle of the maximum of the OFDM symbol the inside UE-specific PDSCH RE that does not comprise reference signal that launches on the antenna port;

n _PRBThe label of expression Physical Resource Block (PRB, Physical Radio Resource), its value is Represent descending wireless resource block (RB, Radio Resource) sum;

RNTP _ThresholdExpression high power thresholding;

Wherein, The peak power output of expression base station, Δ f represents the sub-carrier frequencies interval,

The number of sub carrier wave that represents each RB about the concrete meaning of above-mentioned physical parameter, can referring to the correlation technique document, not repeat them here.

According to the definition of RNTP, with RNTP (n _PRB) value is 0 PRB frequency band, is called the low-power frequency band, with RNTP (n _PRB) value is 1 PRB frequency band, is called the high power frequency band; Simultaneously, will

The user of value is called the high power user, $E_A\left(n_{\mathrm{PRB}}\right)\&le;E_{\max \mathrm{nom}}^{\left(p\right)}{\mathrm{RNTP}}_{\mathrm{threshold}}$ The user be called the low-power user.

According to the definition of RNTP, owing to carried out Inter-Cell Interference Coordination at the high power frequency band, and do not carry out Inter-Cell Interference Coordination on the low-power frequency band, thereby the high power frequency band can be distributed to the high power user, also can distribute to the low-power user simultaneously; And the low-power frequency band should only be distributed to the low-power user to avoid low-power frequency band scheduling high power user, causes presence of intercell interference to increase, so that the problem that systematic function descends.

Fig. 2 is the method flow schematic diagram of coordinating high power frequency band in the LTE system in the prior art.Referring to Fig. 2, take three cell downlink interference coordinations as example, this flow process comprises:

Step 201, the high power user in the identification current area;

In this step, the base station is by obtaining the power threshold that presets, and whether the power that is judged as user assignment is higher than power threshold, if so, confirms that then this user is the high power user.

Step 202 is obtained the high power frequency band PRB Serial Number Range of the interior high power user use of neighbor cell of current area;

In this step, if adjacent residential quarter and current area belong to same base station, can directly by the data dispatch of inside of base station, obtain the band information that neighbor cell high power user uses; If adjacent residential quarter and current area do not belong to same base station, can obtain the band information that neighbor cell high power user uses by between the base station, sending RNTP message.

Step 203, for the high power user in the current area arranges high power frequency band PRB Serial Number Range, make it with neighbor cell in the high power frequency band PRB Serial Number Range that uses of high power user distinguish, to minimize interval the interference.

In this step, the high power frequency band PRB Serial Number Range of current area and the high power frequency band PRB Serial Number Range of neighbor cell can be set to be staggered fully, perhaps, the high power frequency band PRB Serial Number Range of current area and the high power frequency band PRB Serial Number Range of neighbor cell being set partly staggers, overlaps.

By as seen above-mentioned, the high power frequency band is to avoid the method for descending interference in the existing coordination LTE system, when two or more neighbor cells are coordinated simultaneously and change high power frequency band PRB Serial Number Range, owing to not adopting unified frequency band coordination approach between neighbor cell, so that arranging, the high power frequency band of minizone easily causes conflict, and unavoidably cause " ping-pong ", for example, this residential quarter and neighbor cell arrange simultaneously high power frequency band PRB Serial Number Range and the information that arranges are sent to the other side, when finding to have overlapped edge customer high power frequency band, this residential quarter and neighbor cell will be changed the high power frequency band PRB Serial Number Range that self arranges simultaneously, cause the edge customer high power frequency band of this residential quarter and neighbor cell again overlapped, so that the high power frequency band setting between neighbor cell does not reach stable state all the time, the performance of interference coordination reduces greatly; Further, back and forth send message and cause the size of message of X2 interface transmission large, affected the overall performance of LTE system; And, for the high power frequency band setting of the high power frequency band of current area and neighbor cell stagger fully or part staggers, prior art does not provide specific embodiment, causes the uncertainty that realizes.

Summary of the invention

In view of this, main purpose of the present invention is to propose a kind of method of coordinating high power frequency band in long term evolved system, reduces the probability that conflicts when edge customer high power frequency band between neighbor cell is set, the performance that improves interference coordination.

For achieving the above object, the invention provides a kind of method of coordinating high power frequency band in long term evolved system, the method comprises:

The static high power frequency band Physical Resource Block PRB Serial Number Range of each neighbor cell in the pre-configured area group;

Obtain neighbor cell high power frequency band PRB quantity required information according to the strategy that sets in advance;

Determine neighbor cell high power frequency band PRB numbering border;

According to area group high power frequency band PRB quantity required information and static high power frequency band PRB Serial Number Range information, adjust static high power frequency band PRB numbering border, each residential quarter according to the tuning algorithm strategy that sets in advance;

Notify corresponding neighbor cell with the residential quarter static high power frequency band PRB numbering boundary information after adjusting;

Wherein, describedly adjust static high power frequency band PRB numbering border, each residential quarter according to the tuning algorithm strategy that sets in advance and specifically comprise:

Calculation plot group high power frequency band PRB on average adjusts number;

Calculation plot group high power frequency band PRB adjusts the surplus number;

The high power frequency band PRB that on average adjusts number and area group high power frequency band PRB adjustment surplus number distribution neighbor cell border according to the area group high power frequency band PRB that calculates adjusts number;

Adjust number according to the high power frequency band PRB that distributes and adjust static high power frequency band PRB numbering border, residential quarter.

The formula of the static high power frequency band PRB Serial Number Range of each neighbor cell is in the described allocating cell group:

In the formula,

Serial _{PRB_high_power_stillness}The Serial Number Range that represents static high power frequency band PRB;

N _TotalThe PRB sum of expression area group;

α represents the multiplexing coefficient of frequency band;

The expression cell identifier;

Expression rounds downwards.

Described high power frequency band PRB quantity required computing formula is:

${\mathrm{Total}}_{\mathrm{PRB}\_\mathrm{high}\_\mathrm{power}}=\frac{\underset{i=1}{\overset{M}{\mathrm{\&Sigma;}}}{\mathrm{GBR}}_{d\_i}+\underset{j=1}{\overset{N}{\mathrm{\&Sigma;}}}{\mathrm{ABR}}_{d\_j}}{{\mathrm{BR}}_{d\_\mathrm{average}}}$

In the formula,

Total _{PRB_high_power}The required high power frequency band PRB quantity required of expression high power user;

The professional needed bit rate summation of the guaranteed bit rate GBR of institute that expression high power user has admitted;

The professional needed bit rate summation of all Non-GBR that expression high power user has admitted;

BR _{D_average}The average downlink transfer bit rate of the expression current high power Subscriber Unit PRB of LTE system.

Described definite neighbor cell high power frequency band PRB numbering border specifically comprises:

According to cell identifier corresponding to residential quarter high power frequency band PRB quantity required information that obtains

Obtain static high power frequency band PRB Serial Number Range, the border is numbered as high power frequency band PRB in the two ends of neighbor cell high power frequency band PRB Serial Number Range.

The formula that described calculation plot group high power frequency band PRB on average adjusts coefficient is:

In the formula,

Overlap _AveragePRB on average adjusts number for area group high power frequency band;

N _iHigh power frequency band PRB quantity required for neighbor cell;

N is the number of neighbor cell;

N _TotalBe the static high power frequency band of area group PRB quantity.

The formula that described calculation plot group high power frequency band PRB adjusts the surplus number is:

$\mathrm{Suc}=(\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{N}_i-N_{\mathrm{total}})\%n$

In the formula, Suc is that area group high power frequency band PRB adjusts the surplus number.

The number of described neighbor cell is 3, and it is Overlap that the high power frequency band PRB of the residential quarter X of high power frequency band PRB quantity required maximum adjusts number _X, it is Overlap that the high power frequency band PRB of the residential quarter Y that high power frequency band PRB quantity required is time large adjusts number _Y, it is Overlap that the high power frequency band PRB of the residential quarter Z of high power frequency band PRB quantity required minimum adjusts number _Z, the high power frequency band PRB on described distribution neighbor cell border adjusts number and specifically comprises:

If Suc=0, configuration Overlap _X=Overlap _Y=Overlap _Z=Overlap _Average

If Suc=1, configuration Overlap _X=Overlap _Average+ 1, Overlap _Y=Overlap _Z=Overlap _Average

If Suc=2, configuration Overlap _X=Overlap _Y=Overlap _Average+ 1, Overlap _Z=Overlap _Average

Described high power frequency band PRB according to distributing adjusts static high power frequency band PRB numbering border, number adjustment residential quarter and specifically comprises:

Work as Overlap _jDuring for odd number, the static high power frequency band PRB left margin numbering of j residential quarter is expanded (Overlap left _j+ 1) PRB/2, and the static high power frequency band PRB right margin numbering of the left neighbor cell of j residential quarter expanded (Overlap to the right _j-1) PRB/2;

Work as Overlap _jDuring for even number, then the static high power frequency band PRB left margin numbering of j residential quarter is expanded Overlap left _j/ 2 PRB, and the static high power frequency band PRB right margin numbering of the left neighbor cell of j residential quarter expanded Overlap to the right _j/ 2 PRB, wherein, j=X, Y;

The static high power frequency band PRB Serial Number Range that the Z residential quarter is set be the remaining static high power frequency band PRB numbering of area group add Z residential quarter and the little area overlapping of X high power frequency band PRB number and with the high power frequency band PRB number of the little area overlapping of Y.

As seen from the above technical solutions, the method for a kind of coordinating high power frequency band in long term evolved system provided by the invention, the static high power frequency band Physical Resource Block PRB Serial Number Range of each neighbor cell in the pre-configured area group; Obtain neighbor cell high power frequency band PRB quantity required information according to the strategy that sets in advance; Determine neighbor cell high power frequency band PRB numbering border; According to area group high power frequency band PRB quantity required information and static high power frequency band PRB Serial Number Range information, adjust static high power frequency band PRB numbering border, each residential quarter according to the tuning algorithm strategy that sets in advance; Notify corresponding neighbor cell with the residential quarter static high power frequency band PRB numbering boundary information after adjusting.Like this, adopt unified frequency band coordination approach, so that the high power frequency band setting of minizone can settle at one go, effectively avoided the problem of " ping-pong "; Simultaneously, coordinate residential quarter static high power frequency band PRB Serial Number Range according to residential quarter high power frequency band PRB quantity required, the interference of the equalization of can trying one's best minizone, thus effectively reduce the interference of minizone; And, for the high power frequency band of current area and the high power frequency band of neighbor cell specific embodiment has been proposed.

Description of drawings

Fig. 1 is the static band plan schematic diagram in three residential quarters in the prior art.

Coordinate the method flow schematic diagram of high power frequency band in the LTE system in Fig. 2 prior art.

Fig. 3 is the method flow schematic diagram of embodiment of the invention coordinating high power frequency band in long term evolved system.

Fig. 4 is the static high power frequency band PRB Serial Number Range configuration schematic diagram of embodiment of the invention area group.

Fig. 5 is the structural representation of embodiment of the invention area group.

Fig. 6 is the static high power bandwidth assignment of three coordinating district interferences schematic diagram in the embodiment of the invention one.

Fig. 7 is the static high power bandwidth assignment of three coordinating district interferences schematic diagram in the embodiment of the invention two.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.

In the prior art, downlink interference collaboration for three minizones that belong to same base station, can carry out the interference coordination of minizone to coordinate the high power frequency band in the LTE system by means such as combined dispatching and wave beam formings, thereby, in the embodiment of the invention, consider the downlink interference collaboration of neighbor cell between the different base station.

According to LTE agreement regulation, physical-layer cell identifier satisfies relational expression (1) in cell identifier and physical-layer cell identifier group and the physical-layer cell identifier group:

$N_{\mathrm{ID}}^{\mathrm{cell}}={3N}_{\mathrm{ID}}^{\left(1\right)}+N_{\mathrm{ID}}^{\left(2\right)}---\left(1\right)$

In the formula,

The expression cell identifier;

Expression physical-layer cell identifier group, value is the integer in 0～167;

Physical-layer cell identifier in the expression physical-layer cell identifier group, value is the integer in 0～2.

In the embodiment of the invention, the physical-layer cell identifier group that sets in advance the neighbor cell that belongs to different base station is identical, distinguishes different neighbor cells with physical-layer cell identifier in the physical-layer cell identifier group.For instance, take the area group of 3 neighbor cells that belong to different base station shown in Figure 1 as example, 3 neighbor cells are set

Be worth identically, and establish and be numbered 1 residential quarter,

Be numbered 2 residential quarter,

Be numbered 3 residential quarter,

Like this, according to neighbor cell

Can determine whether each neighbor cell belongs to same area group, in same area group, identical downlink interference collaboration algorithm is carried out according to load variations or the load variations of self of other neighbor cells in residential quarter by acquiescence, with the edge customer high power frequency band that reduces this residential quarter and neighbor cell the overlapped probability that leads to a conflict is set.

According to formula (1)

After value determines that each neighbor cell belongs to same area group, be the static high power frequency band PRB Serial Number Range that total bandwidth arranges each neighbor cell in this area group according to the total PRB number of area group.The calculating formula of static high power frequency band PRB numbering is as follows:

In the formula,

Serial _{PRB_high_power_stillness}The Serial Number Range that represents static high power frequency band PRB;

N _TotalThe PRB sum of expression area group is determined by pre-configured area group bandwidth;

α represents the multiplexing coefficient of frequency band, in the embodiment of the invention, adopts the area group model of three residential quarters,

$\mathrm{\&alpha;}=\frac{1}{3};$

Expression rounds downwards.

Fig. 3 is the method flow schematic diagram of embodiment of the invention coordinating high power frequency band in long term evolved system.Referring to Fig. 3, this flow process comprises:

The static high power frequency band PRB Serial Number Range of each neighbor cell in the step 301, pre-configured area group;

In this step, according to the static high power frequency band PRB Serial Number Range of each neighbor cell in formula (2) the allocating cell group, for instance, if the PRB of area group sum N _Total=90, the multiplexing coefficient of frequency band

The cell identifier of three neighbor cells is respectively 0,1,2, then according to formula (2), cell identifier be 0 residential quarter static high power frequency band PRB Serial Number Range for 1,2 ... 30}, cell identifier is that the static high power frequency band PRB Serial Number Range of 1 residential quarter is { 31,32 ... 60}, cell identifier are that the static high power frequency band PRB Serial Number Range of 2 residential quarter is { 61,62 ... 90}.Certainly, the static high power frequency band PRB Serial Number Range of each neighbor cell also can be configured according to actual needs, in the embodiment of the invention, adopts the method for three neighbor cell mean allocation PRB sums.

Fig. 4 is the static high power frequency band PRB Serial Number Range configuration schematic diagram of embodiment of the invention area group.Referring to Fig. 4, with the whole system frequency band of area group according to from low to high order, successively to high power frequency band PRB be numbered into 1,2 ... N....}.If cell identifier is the edge band F1 that planning is used in 0 residential quarter (Cell 1), cell identifier is the edge band F2 that planning is used in 1 residential quarter (Cell 2), and cell identifier is the edge band F3 that planning is used in 2 residential quarter (Cell 3).Cell 1, Cell 2, Cell 3 belong to different base stations, form an area group, and in Fig. 4, F 1, F2, F3 are mutually orthogonal, itself and equal the total frequency band of system, i.e. PRB sum.

Fig. 5 is the structural representation of embodiment of the invention area group.Referring to Fig. 5, three neighbor cells that belong to different base station form area group, as shown in phantom in FIG..

Step 302 is obtained neighbor cell high power frequency band PRB quantity required information according to the strategy that sets in advance;

In this step, the strategy that sets in advance is neighbor cell when self high power frequency band PRB quantity required changes, and sends information to adjacent residential quarter.If neighbor cell and current area belong to a base station, then can by inner data dispatch, obtain neighbor cell high power frequency band PRB quantity required information; If neighbor cell and current area do not belong to same base station, can be by between the base station, sending and receive the high power frequency band PRB quantity required information that RNTP message is obtained neighbor cell.

In the embodiment of the invention, the high power frequency band PRB quantity required of three neighbor cells of more same area group, the residential quarter of establishing high power frequency band PRB quantity required maximum is residential quarter X, corresponding high power frequency band PRB quantity required is N1; Second largest residential quarter of high power frequency band PRB quantity required is residential quarter Y, and corresponding high power frequency band PRB quantity required is N2; The residential quarter of high power frequency band PRB quantity required minimum is residential quarter Z, and corresponding high power frequency band PRB quantity required is N3.N1, N2 and N3 with may be greater than N _Total, also may be equal to or less than N _TotalCertainly, in the practical application, for the pre-configured identical situation of static high power frequency band PRB Serial Number Range quantity in high power frequency band PRB quantity required and this residential quarter of each neighbor cell, then do not carry out any processing.

In the embodiment of the invention, the average transmission bit rate of the current high power Subscriber Unit of the needed bit rate of carrying and the LTE system PRB that has admitted according to the high power user calculates high power frequency band PRB quantity required.

${\mathrm{Total}}_{\mathrm{PRB}\_\mathrm{high}\_\mathrm{power}}=\frac{\underset{i=1}{\overset{M}{\mathrm{\&Sigma;}}}{\mathrm{GBR}}_{d\_i}+\underset{j=1}{\overset{N}{\mathrm{\&Sigma;}}}{\mathrm{ABR}}_{d\_j}}{{\mathrm{BR}}_{d\_\mathrm{average}}}$

In the formula,

Total _{PRB_high_power}The required high power frequency band PRB quantity required of expression high power user;

The professional needed bit rate summation of guaranteed bit rate (GBR, GuaranteedBit Rate) that expression high power user has admitted can be obtained according to the prior art pertinent literature;

The professional needed bit rate summation of all Non-GBR that expression high power user has admitted can be obtained according to the prior art pertinent literature;

BR _{D_average}The average downlink transfer bit rate of the expression current high power Subscriber Unit PRB of LTE system can be obtained according to the prior art pertinent literature.

In the practical application, when high power user's bit rate changes in demand has surpassed the mean bitrate of single PRB, just can cause the variation of high power frequency band PRB demand, thereby trigger resetting of high power frequency band.Like this, be not that all carrying admittance or release all can cause resetting of high power frequency, ensured Systems balanth.

Step 303 is determined neighbor cell high power frequency band PRB numbering border;

In this step, according to cell identifier corresponding to residential quarter high power frequency band PRB quantity required information that obtains Obtain static high power frequency band PRB Serial Number Range, thereby can obtain the static high power frequency band PRB Serial Number Range of corresponding neighbor cell, the border is numbered as high power frequency band PRB in the two ends of neighbor cell high power frequency band PRB Serial Number Range.For example, for neighbor cell X, Y, the static high power frequency band PRB Serial Number Range of Z, as the X border, the low static high power frequency band PRB numbering place of Y residential quarter is as the Y border with the low static high power frequency band PRB numbering place of X residential quarter, and the low static high power frequency band PRB numbering place of Z residential quarter is as the Z border.Certainly, in the practical application, also can be respectively with the high static high power frequency band PRB numbering place of X residential quarter, Y residential quarter and Z residential quarter as X border, Y border and Z border.

Step 304 according to area group high power frequency band PRB quantity required information and static high power frequency band PRB Serial Number Range information, is adjusted static high power frequency band PRB numbering border, each residential quarter according to the tuning algorithm strategy that sets in advance;

In this step, on average adjust coefficient according to the high power frequency band PRB quantity required of each neighbor cell (area group) and the difference calculation plot group high power frequency band PRB of static high power frequency band PRB quantity:

In the formula,

Overlap _AveragePRB on average adjusts number for area group high power frequency band;

N1, N2, N3 are respectively the high power frequency band PRB quantity required of neighbor cell, and in the embodiment of the invention, the number of neighbor cell is 3;

N _TotalBe the static high power frequency band of area group PRB quantity.

In the practical application, if Overlap _AverageValue is more than or equal to 0, and the high power frequency band PRB boundary of three neighbor cells of expression area group needs overlapping minimum PRB number; If Overlap _AverageValue is less than 0, and the high power frequency band PRB boundary of three neighbor cells of expression area group needs the minimum PRB number at interval.

As mentioned above, if with the low static high power frequency band PRB numbering place of neighbor cell as the border, according to the equalization principle, it is Overlap that the high power frequency band PRB that establishes the X residential quarter adjusts number _X, it is Overlap that the high power frequency band PRB of Y residential quarter adjusts number _Y, it is Overlap that the high power frequency band PRB of Z residential quarter adjusts number _ZOverlap _XOverlapping or the interval number of expression X residential quarter and its left neighbor cell high power frequency band, Overlap _YOverlapping or the interval number of expression Y residential quarter and its left neighbor cell high power frequency band, Overlap _ZOverlapping or the interval number of expression Z residential quarter and its left neighbor cell high power frequency band.

In the embodiment of the invention, the tuning algorithm strategy specifically describes as follows:

At first, calculation plot group high power frequency band PRB adjusts the surplus number:

Suc=(N1+N2+N3-N _total)%3 （4）

In the formula, Suc is that area group high power frequency band PRB adjusts the surplus number.

Secondly, distribute the high power frequency band PRB on neighbor cell border to adjust number.

In the embodiment of the invention, suppose that the high power frequency band PRB quantity required of X residential quarter is maximum, the high power frequency band PRB quantity required of Z residential quarter is minimum.Then

If Suc=0, configuration Overlap _X=Overlap _Y=Overlap _Z=Overlap _Average

If Suc=1, configuration Overlap _X=Overlap _Average+ 1, Overlap _Y=Overlap _Z=Overlap _Average

If Suc=2, configuration Overlap _X=Overlap _Y=Overlap _Average+ 1, Overlap _Z=Overlap _Average

Then, adjust number according to the high power frequency band PRB that distributes and adjust static high power frequency band PRB numbering border, residential quarter.

In this step, select the static high power frequency band border adjacent with the Y residential quarter, X residential quarter as the reference border, static high power frequency band PRB with this border is numbered initial reference point, the static high power frequency band PRB that corresponding X residential quarter and Y residential quarter are set to both sides adjusts number, and then the high power frequency band PRB adjustment number according to the Z cell boarder arranges corresponding Z residential quarter static high power frequency band PRB numbering.

Specifically,

If be the X border with reference to the border, work as Overlap _XDuring for odd number, the static high power frequency band PRB left margin numbering of X residential quarter is expanded (Overlap left _X+ 1) PRB/2, institute it should be noted, as (Overlap _XWhen+1)/2 value is negative, expand (Overlap left _X+ 1)/2 a PRB is equivalent to expand just several PRB to the right, simultaneously, the static high power frequency band PRB right margin numbering of the left neighbor cell (Y residential quarter) of X residential quarter is expanded (Overlap to the right _X-1) 2 PRB; Work as Overlap _XDuring for even number, then the static high power frequency band PRB left margin numbering of X residential quarter is expanded Overlap left _X/ 2 PRB expand Overlap to the right with the static high power frequency band PRB right margin numbering of the left neighbor cell (Y residential quarter) of X residential quarter _X/ 2 PRB.

If be the Y border with reference to the border, work as Overlap _YDuring for odd number, the static high power frequency band PRB left margin numbering of Y residential quarter is expanded (Overlap left _Y+ 1) PRB/2 expands (Overlap to the right with the static high power frequency band PRB right margin numbering of the left neighbor cell (X residential quarter) of Y residential quarter _Y-1) PRB/2; Work as Overlap _YDuring for even number, the static high power frequency band PRB left margin numbering of Y residential quarter is expanded Overlap left _Y/ 2 PRB expand Overlap to the right with the static high power frequency band PRB right margin numbering of the left neighbor cell (X residential quarter) of Y residential quarter _Y/ 2 PRB.

Then, high power frequency band PRB border, X residential quarter with the reference boundary is numbered benchmark, count to another border telegoniometer of X residential quarter till the high power frequency band PRB quantity required of X residential quarter, the static high power frequency band PRB that is the X residential quarter numbers the high power frequency band PRB adjustment number that the number of adjusting equals the X cell boarder, and then the static high power frequency band of this section PRB numbers the scope that arranges for the static high power frequency band PRB of the X residential quarter after adjusting; High power frequency band PRB border, Y residential quarter with the reference boundary is numbered benchmark, count to another border telegoniometer of Y residential quarter till the high power frequency band PRB quantity required of Y residential quarter, the static high power frequency band PRB that is the Y residential quarter numbers the high power frequency band PRB adjustment number that the number of adjusting equals the Y cell boarder, and then the static high power frequency band of this section PRB numbers the scope that arranges for the static high power frequency band PRB of the Y residential quarter after adjusting.

At the static high power frequency band PRB Serial Number Range of X residential quarter and Y residential quarter after setting completed, the static high power frequency band PRB Serial Number Range that the Z residential quarter is set be the remaining static high power frequency band PRB numbering of area group add Z residential quarter and the little area overlapping of X high power frequency band PRB number and with the high power frequency band PRB number of the little area overlapping of Y; Perhaps, at Overlap _ZDuring for negative, the static high power frequency band PRB Serial Number Range that the Z residential quarter is set be the remaining static high power frequency band PRB of area group deduct Z residential quarter and X minizone every high power frequency band PRB number and with the Y minizone every high power frequency band PRB number, its value equals the high power frequency band PRB quantity required of Z residential quarter.

Step 305 is notified corresponding neighbor cell with the residential quarter static high power frequency band PRB numbering boundary information after adjusting.

In this step, if neighbor cell and current area belong to a base station, then can by inner data dispatch, notify corresponding neighbor cell with the residential quarter static high power frequency band PRB numbering boundary information after adjusting; If neighbor cell and current area do not belong to same base station, can be by notifying corresponding neighbor cell at the residential quarter static high power frequency band PRB numbering boundary information that will send between the base station after RNTP message will be adjusted.After neighbor cell receives relevant information, send data according to the static high power frequency band of respective cell PRB numbering boundary information.

By as seen above-mentioned, the method of the coordinating high power frequency band in long term evolved system of the embodiment of the invention, static high power frequency band PRB Serial Number Range by each neighbor cell in the pre-configured area group, obtain neighbor cell high power frequency band PRB quantity required information according to the strategy that sets in advance, determine neighbor cell high power frequency band PRB numbering border, according to area group high power frequency band PRB quantity required information and static high power frequency band PRB Serial Number Range information, adjust static high power frequency band PRB numbering border, each residential quarter according to the tuning algorithm strategy that sets in advance, notify corresponding neighbor cell with the residential quarter static high power frequency band PRB numbering boundary information after adjusting.Like this, owing to adopting unified band setting method (tuning algorithm strategy) between neighbor cell, so that the high power frequency band setting of minizone can settle at one go, effectively avoided the problem of " ping-pong ", reduced the probability that conflicts when edge customer high power frequency band between neighbor cell is set, ensure the rate of convergence that minizone high power frequency band arranges, improved the LTE Systems balanth; Simultaneously, coordinate residential quarter static high power frequency band PRB numbering according to residential quarter high power frequency band PRB quantity required, the interference of the equalization of can trying one's best minizone, the interference of avoiding individual cells to be subject to is excessive, thereby affect throughput and the QoS of customer of this residential quarter, the load balancing that is conducive to the minizone, and so that the time that the high power frequency band of edge customer overlaps between neighbor cell and overlapping frequency band range reach minimizes as far as possible, thus effectively reduce the interference of minizone; And, for the high power frequency band of current area and the high power frequency band of neighbor cell specific embodiment has been proposed, be conducive to the enforcement of technical scheme.

Below lift two specific embodiments, the invention will be further described.

Embodiment one

If the static high power frequency band of area group PRB quantity is 90, static high power frequency band PRB Serial Number Range method according to each neighbor cell in the aforesaid allocating cell group, the static high power frequency band PRB Serial Number Range of three neighbor cells of same area group is respectively: the static high power frequency band PRB Serial Number Range of Cell 1 is { 1,2 ... 30}; The static high power frequency band PRB Serial Number Range of Cell 2 be 31,32 ... 60}; The static high power frequency band PRB Serial Number Range of Cell 3 be 61,62 ... 90}.

The high power frequency band PRB quantity required of three neighbor cells of the more same area group of current area, in the practical application, can be when the network planning, when the static high power frequency band PRB quantity of residential quarter high power frequency band PRB quantity required and configuration changes, arrange to the residential quarter of acquiescence and send this residential quarter high power frequency band PRB quantity required information, the residential quarter of acquiescence is current area.

Fig. 6 is the static high power bandwidth assignment of three coordinating district interferences schematic diagram in the embodiment of the invention one.Referring to Fig. 6, the residential quarter of establishing high power frequency band PRB quantity required maximum is residential quarter X, corresponding Cell 2, corresponding high power frequency band PRB quantity required N1=36; High power frequency band PRB quantity required time large residential quarter is residential quarter Y, corresponding Cell 1, corresponding high power frequency band PRB quantity required N2=33; The residential quarter of high power frequency band PRB quantity required minimum is residential quarter Z, corresponding Cell 3, corresponding high power frequency band PRB quantity required N3=28.

The low PRB of X residential quarter static high power frequency band PRB Serial Number Range is numbered (namely numbering 31) as the X border; The low PRB of Y residential quarter static high power frequency band PRB Serial Number Range is numbered (namely numbering 1) as the Y border; The low PRB of Z residential quarter static high power frequency band PRB Serial Number Range is numbered (namely numbering 61) as the Z border.

Calculate respectively Overlap _AverageAnd Suc:

Suc=(N1+N2+N3-N)%3=(36+33+28-90)%3=1。

According to the Overlap that calculates _AverageAnd Suc can obtain the high power frequency band PRB adjustment number on each neighbor cell border:

Overlap _X=Overlap _average+1=3；

Overlap _Y=Overlap _Z=Overlap _average=2。

As seen from Figure 6, the static high power frequency band PRB border adjacent with the Y residential quarter, X residential quarter is the X border, with the X border as the reference border, because Overlap _X=3, so, the left margin of the static high power frequency band PRB on X border, X residential quarter is expanded (Overlap left _X+ 1)/and a 2=2 PRB, namely the PRB of the static high power frequency band PRB left margin of X residential quarter is numbered 29; Simultaneously, Overlap _Y=2, the static high power frequency band PRB right margin of Y residential quarter is expanded (Overlap to the right _X-1)/and a 2=1 PRB, namely the PRB of the static high power frequency band PRB right margin of Y residential quarter is numbered 31.

After the right margin numbering of the static high power frequency band of left margin numbering and the Y residential quarter PRB numbering of having determined X residential quarter static high power frequency band PRB numbering:

Because the high power frequency band PRB quantity required of X residential quarter is 36, take the PRB numbering 29 of left margin as benchmark, be configured to the right, the static high power frequency band PRB Serial Number Range of configuration be 29,30 ... 64}; Because the high power frequency band PRB quantity required of Y residential quarter is 33, take the PRB numbering 31 of right margin as benchmark, be configured left, the static high power frequency band PRB Serial Number Range of configuration be 89,90,1,2 ... 31}; Overlap _Z=2, therefore, the static high power frequency band PRB Serial Number Range of the Z residential quarter of configuration is remaining PRB{65,66, ... 88}, add the Z residential quarter to the PRB{64 of the little area overlapping of X, 63} and to the PRB{89 of the little area overlapping of Y, 90}, namely the static high power frequency band PRB Serial Number Range of the Z residential quarter of configuration is { 63,64 ... 89,90}.

Embodiment two

Among the embodiment one, the high power frequency band PRB quantity required of area group is greater than static high power frequency band PRB quantity, among this embodiment, describes as example less than static high power frequency band PRB quantity take the high power frequency band PRB quantity required of area group.

If the static high power frequency band of area group PRB quantity is 92, according to the static high power frequency band PRB Serial Number Range method such as each neighbor cell in the embodiment one described allocating cell group, the static high power frequency band PRB Serial Number Range of three neighbor cells of same area group is respectively: the static high power frequency band PRB Serial Number Range of Cell 1 is { 1,2 ... 30}; The static high power frequency band PRB Serial Number Range of Cell 2 be 31,32 ... 60,61}; The static high power frequency band PRB Serial Number Range of Cell 3 be 62,63 ... 90,91,92}.

Fig. 7 is the static high power bandwidth assignment of three coordinating district interferences schematic diagram in the embodiment of the invention two.Referring to Fig. 7, the high power frequency band PRB quantity required of three neighbor cells of the more same area group of current area, the residential quarter of establishing high power frequency band PRB quantity required maximum is residential quarter X, corresponding Cell 2, corresponding high power frequency band PRB quantity required N1=33; High power frequency band PRB quantity required time large residential quarter is residential quarter Y, corresponding Cell 1, corresponding high power frequency band PRB quantity required N2=28; The residential quarter of high power frequency band PRB quantity required minimum is residential quarter Z, corresponding Cell 3, corresponding high power frequency band PRB quantity required N3=25.

The low PRB of X residential quarter static high power frequency band PRB Serial Number Range is numbered (numbering 31) as the X border; The low PRB of Y residential quarter PRB Serial Number Range is numbered (numbering 1) as the Y border; The low PRB of Z residential quarter PRB Serial Number Range is numbered (numbering 62) as the Z border.

Similarly, calculate respectively Overlap _AverageAnd Suc:

Suc＝(N1+N2+N3-N)%3＝0。

According to the Overlap that calculates _AverageAnd Suc can obtain the high power frequency band PRB adjustment number on each neighbor cell border:

Overlap _X=Overlap _average=-2；

Overlap _Y=Overlap _average=-2；

Overlap _Z=Overlap _average=-2。

As seen from Figure 7, the static high power frequency band PRB border adjacent with the Y residential quarter, X residential quarter is the X border, with the X border as the reference border, because Overlap _X=-2, so, the left margin of the static high power frequency band PRB on X border, X residential quarter is expanded Overlap left _X/ 2=-1 PRB namely expands 1 PRB to the right with the left margin of the static high power frequency band PRB on X border, X residential quarter, and namely the PRB of the static high power frequency band PRB left margin of X residential quarter is numbered 32; Simultaneously, Overlap _Y=-2, the static high power frequency band PRB right margin of the left neighbor cell (Y residential quarter) of X residential quarter is expanded Overlap to the right _X/ 2=-1 PRB namely expands 1 PRB left with the static high power frequency band PRB right margin of Y residential quarter, and namely the PRB of the static high power frequency band PRB right margin of Y residential quarter is numbered 29.

After the right margin numbering of the static high power frequency band of left margin numbering and the Y residential quarter PRB numbering of having determined X residential quarter static high power frequency band PRB numbering:

Because the high power frequency band PRB quantity required of X residential quarter is 33, take the PRB numbering 32 of left margin as benchmark, be configured to the right, the static high power frequency band PRB Serial Number Range of configuration be 32,33 ... 64}; Because the high power frequency band PRB quantity required of Y residential quarter is 33, take the PRB numbering 29 of right margin as benchmark, be configured left, the static high power frequency band PRB Serial Number Range of configuration be 2,3 ... 29}; Overlap _Z=-2, therefore, the static high power frequency band PRB Serial Number Range of the Z residential quarter of configuration and the high power frequency band PRB of Y residential quarter number 2 PRB of being separated by, number 2 PRB of being separated by with the high power frequency band PRB of X residential quarter, then the static high power frequency band PRB Serial Number Range of the Z residential quarter of configuration is { 67,68 ... 90,91}.

The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. the method for a coordinating high power frequency band in long term evolved system is characterized in that, the method comprises:

The static high power frequency band Physical Resource Block PRB Serial Number Range of each neighbor cell in the pre-configured area group;

Obtain neighbor cell high power frequency band PRB quantity required information according to the strategy that sets in advance;

Determine neighbor cell high power frequency band PRB numbering border;

According to area group high power frequency band PRB quantity required information and static high power frequency band PRB Serial Number Range information, adjust static high power frequency band PRB numbering border, each residential quarter according to the tuning algorithm strategy that sets in advance;

Notify corresponding neighbor cell with the residential quarter static high power frequency band PRB numbering boundary information after adjusting;

Wherein, describedly adjust static high power frequency band PRB numbering border, each residential quarter according to the tuning algorithm strategy that sets in advance and specifically comprise:

Calculation plot group high power frequency band PRB on average adjusts number;

Calculation plot group high power frequency band PRB adjusts the surplus number;

The high power frequency band PRB that on average adjusts number and area group high power frequency band PRB adjustment surplus number distribution neighbor cell border according to the area group high power frequency band PRB that calculates adjusts number;

Adjust number according to the high power frequency band PRB that distributes and adjust static high power frequency band PRB numbering border, residential quarter.

2. the method for claim 1 is characterized in that, the formula of the static high power frequency band PRB Serial Number Range of each neighbor cell is in the described allocating cell group:

In the formula,

Serial _{PRB_high_power_stillness}The Serial Number Range that represents static high power frequency band PRB;

N _TotalThe PRB sum of expression area group;

α represents the multiplexing coefficient of frequency band;

The expression cell identifier;

Expression rounds downwards.

3. method as claimed in claim 2 is characterized in that, described high power frequency band PRB quantity required computing formula is:

${\mathrm{Total}}_{\mathrm{PRB}\_\mathrm{high}\_\mathrm{power}}=\frac{\underset{i=1}{\overset{M}{\mathrm{\&Sigma;}}}{\mathrm{GBR}}_{d\_i}+\underset{j=1}{\overset{N}{\mathrm{\&Sigma;}}}{\mathrm{ABR}}_{d\_j}}{{\mathrm{BR}}_{d\_\mathrm{average}}}$

In the formula,

Total _{PRB_high_power}The required high power frequency band PRB quantity required of expression high power user;

The professional needed bit rate summation of the guaranteed bit rate GBR of institute that expression high power user has admitted;

The professional needed bit rate summation of all Non-GBR that expression high power user has admitted;

BR _{D_average}The average downlink transfer bit rate of the expression current high power Subscriber Unit PRB of LTE system.

4. method as claimed in claim 3 is characterized in that, described definite neighbor cell high power frequency band PRB numbering border specifically comprises:

According to cell identifier corresponding to residential quarter high power frequency band PRB quantity required information that obtains

Obtain static high power frequency band PRB Serial Number Range, the border is numbered as high power frequency band PRB in the two ends of neighbor cell high power frequency band PRB Serial Number Range.

5. the method for claim 1 is characterized in that, the formula that described calculation plot group high power frequency band PRB on average adjusts number is:

In the formula,

Overlap _AveragePRB on average adjusts number for area group high power frequency band;

N _iHigh power frequency band PRB quantity required for neighbor cell;

N is the number of neighbor cell;

N _TotalBe the static high power frequency band of area group PRB quantity.

6. method as claimed in claim 5 is characterized in that, the formula that described calculation plot group high power frequency band PRB adjusts the surplus number is:

$\mathrm{Suc}=(\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{N}_i-N_{\mathrm{total}})\%n$

In the formula, Suc is that area group high power frequency band PRB adjusts the surplus number.

7. method as claimed in claim 6 is characterized in that, the number of described neighbor cell is 3, and it is Overlap that the high power frequency band PRB of the residential quarter X of high power frequency band PRB quantity required maximum adjusts number _X, it is Overlap that the high power frequency band PRB of the residential quarter Y that high power frequency band PRB quantity required is time large adjusts number _Y, it is Overlap that the high power frequency band PRB of the residential quarter Z of high power frequency band PRB quantity required minimum adjusts number _Z, the high power frequency band PRB on described distribution neighbor cell border adjusts number and specifically comprises:

If Suc=0, configuration Overlap _X=Overlap _Y=Overlap _Z=Overlap _Average

If Suc=1, configuration Overlap _X=Overlap _Average+ 1, Overlap _Y=Overlap _Z=Overlap _Average

If Suc=2, configuration Overlap _X=Overlap _Y=Overlap _Average+ 1, Overlap _Z=Overlap _Average

8. method as claimed in claim 7 is characterized in that, described high power frequency band PRB according to distributing adjusts static high power frequency band PRB numbering border, number adjustment residential quarter and specifically comprises:

Work as Overlap _jDuring for odd number, the static high power frequency band PRB left margin numbering of j residential quarter is expanded (Overlap left _j+ 1) PRB/2, and the static high power frequency band PRB right margin numbering of the left neighbor cell of j residential quarter expanded (Overlap to the right _j-1) PRB/2;

Work as Overlap _jDuring for even number, then the static high power frequency band PRB left margin numbering of j residential quarter is expanded Overlap left _j/ 2 PRB, and the static high power frequency band PRB right margin numbering of the left neighbor cell of j residential quarter expanded Overlap to the right _j/ 2 PRB, wherein, j=X, Y;

The static high power frequency band PRB Serial Number Range that the Z residential quarter is set be the remaining static high power frequency band PRB numbering of area group add Z residential quarter and the little area overlapping of X high power frequency band PRB number and with the high power frequency band PRB number of the little area overlapping of Y.

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