CN102082615B - Method and equipment for indentifying interference source cell and adjusting antenna downward inclination angle of cell - Google Patents

Abstract

The invention discloses a method and equipment for determining the interference source cell and adjusting the antenna downtilt angle of the cell. The main content includes: taking the interference model of DwPTS to UpPTS between cells as the basis of the interference optimization scheme, and determining the interfered according to the interference model The cell and the interfering source cell further reduce the interference power to the interfered cell by adjusting the downtilt angle of the antenna of the interfering source cell, and reduce the uplink synchronization interference between cells while avoiding the problems existing in the UpPTS Shifting scheme.

Description

Method and device for determining interference source cell and adjusting cell antenna downtilt angle

technical field

The invention relates to the communication field, in particular to a method and equipment for determining an interference source cell and adjusting the downtilt angle of an antenna of the cell.

Background technique

There are special time slots in the frame structure of TD-SCDMA, as shown in Figure 1, the downlink pilot time slot (DwPTS) is followed by the guard time slot (GP) and the uplink pilot time slot (UpPTS). For base station A, since the downlink pilot signals transmitted by other base stations with the same frequency reach base station A after a period of transmission, when base station A receives the uplink synchronization signal (SYNC_UL) transmitted by the mobile terminal in the uplink pilot time slot, At the same time, the downlink pilot signal transmitted by other base stations with the same frequency will be received, and the uplink synchronization interference problem will occur, which may eventually cause the mobile terminal to fail to access base station A.

In order to solve the problem of uplink synchronization interference, the TD-SCDMA standard of the China Communications Standards Association proposes an uplink pilot time slot switching (UpPTS Shifting) scheme. The main idea of the UpPTS Shifting scheme is: shift the uplink pilot time slot of base station A back for a period of time, so that the downlink pilot signals transmitted by other base stations with the same frequency do not occupy the uplink pilot time slot when they arrive at base station A, so as to avoid other same-frequency The downlink pilot signal transmitted by the frequency base station interferes with the uplink synchronization signal received by base station A.

Although the UpPTS Shifting scheme can reduce uplink synchronization interference, the UpPTS Shifting scheme also has the following problems: because in the UpPTS Shifting scheme, the uplink pilot time slot of base station A is pushed back for a period of time, it will occupy service time slots such as TS1 and TS2, Therefore, it will reduce the traffic that the transmission system can carry, that is, the UpPTS Shifting scheme reduces uplink synchronization interference at the expense of uplink transmission capacity; even if the uplink pilot time slot and TS1 common time slot technology is used to solve the problem of uplink transmission capacity reduction , since there is also interference between the uplink pilot time slot and TS1, it will additionally cause the problem of uplink synchronization interference.

Contents of the invention

Embodiments of the present invention provide a method and equipment for determining an interference source cell, so as to determine a cell causing interference to an UpPTS.

A method for determining an uplink pilot time slot UpPTS interference source cell, the method comprising:

In every two cells in the set area, determine the interference power of the signal transmitted by one cell in the downlink pilot time slot DwPTS to the signal received by the other cell in UpPTS;

Taking the cell whose sum of the received interference power is greater than the first threshold value as the interfered cell;

An interference source cell corresponding to each interfered cell is respectively determined, the interference power of the interference source cell to the corresponding interfered cell is greater than a second threshold, and the first threshold is greater than the second threshold.

A device for determining an uplink pilot time slot UpPTS interference source cell, the device comprising:

The interference power determination module is used to determine the interference power of the signal transmitted by one cell in the downlink pilot time slot DwPTS to the signal received by the other cell in the UpPTS in every two cells in the set area;

The interfered cell determination module is configured to use the cell whose sum of the received interference power is greater than the first threshold value as the interfered cell;

An interference source cell determination module, configured to determine an interference source cell corresponding to each interfered cell, the interference power of the interference source cell to the corresponding interfered cell is greater than a second threshold value, and the first threshold value is greater than second threshold.

The beneficial effects of the embodiments of the present invention are as follows:

Since the embodiment of the present invention uses the inter-cell DwPTS to UpPTS interference model as the basis for the interference optimization scheme, and determines the interfered cell and the interferer cell according to the interference model, therefore, processing the accurately determined interferer cell can reduce the Uplink synchronization interference between them.

The embodiment of the present invention also provides a method and device for adjusting the antenna downtilt angle of a cell, so as to solve the problem of uplink synchronization interference between cells when transmitting signals on the DwPTS and receiving signals on the UpPTS.

A method for adjusting the antenna downtilt angle of a cell, the method comprising:

In every two cells in the set area, determine the interference power of the signal transmitted by one cell in the downlink pilot time slot DwPTS to the signal received by the other cell in the uplink pilot time slot UpPTS;

Taking the cell whose sum of the received interference power is greater than the first threshold value as the interfered cell;

Respectively determine the interference source cell corresponding to each interfered cell, the interference power of the interference source cell to the corresponding interfered cell is greater than a second threshold value, and the first threshold value is greater than the second threshold value;

Adjusting the antenna downtilt of the interference source cell, wherein: after the antenna downtilt of the interference source cell is adjusted, the interference power to the corresponding interfered cell is smaller than the interference power to the corresponding interfered cell before the antenna downtilt is adjusted.

A device for adjusting the antenna downtilt angle of a cell, characterized in that the device includes:

The interference power determination module is used to determine the interference power of the signal transmitted by one cell in the downlink pilot time slot DwPTS to the signal received by the other cell in the uplink pilot time slot UpPTS in every two cells in the set area ;

The interfered cell determination module is configured to use the cell whose sum of the received interference power is greater than the first threshold value as the interfered cell;

An interference source cell determination module, configured to determine an interference source cell corresponding to each interfered cell, the interference power of the interference source cell to the corresponding interfered cell is greater than a second threshold value, and the first threshold value is greater than second threshold value;

The first adjustment module is used to adjust the antenna downtilt of the interference source cell, wherein: after the antenna downtilt of the interference source cell is adjusted, the interference power to the corresponding interfered cell is less than that to the corresponding interfered cell before the antenna downtilt adjustment The interference power of the cell.

The beneficial effects of the embodiments of the present invention are as follows:

Since the embodiment of the present invention uses the inter-cell DwPTS to UpPTS interference model as the basis of the interference optimization scheme, the interfered cell and the interfered source cell are determined according to the interference model, and the interference to the interfered cell is reduced by adjusting the antenna downtilt angle of the interfered source cell. The interference power of the cell reduces the uplink synchronization interference between cells while avoiding the problems existing in the UpPTSShifting scheme.

Description of drawings

FIG. 1 is a schematic diagram of a special time slot structure in the background technology;

FIG. 2 is a schematic diagram of a method for determining an interference source cell in Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of a method for adjusting the antenna downtilt angle of a cell in Embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of a method for adjusting the antenna downtilt angle of a cell in Embodiment 3 of the present invention;

FIG. 5 is a schematic structural diagram of a device for determining an interference source cell according to Embodiment 5 of the present invention;

Figures 6(a), 6(b) and 6(c) are schematic structural diagrams of a device for adjusting the antenna downtilt angle of a cell in Embodiment 6 of the present invention.

Detailed ways

In order to achieve the purpose of the present invention, the embodiment of the present invention measures the uplink synchronous interference of two cells, and establishes the interference model of the signal transmitted by the DwPTS between the cells to the signal received by the UpPTS, thereby locating the seriously interfered cell and the cell that is the source of the interference. cell, and further, by adjusting the downtilt angle of the antenna of the source cell, the uplink synchronization interference between the cells can be reduced.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 2, it is a schematic diagram of a method for determining an interference source cell in Embodiment 1 of the present invention. The method in Embodiment 1 includes the following steps:

Step 101: In every two cells in the set area, determine the interference power of the signal transmitted by one cell on the DwPTS to the signal received by the other cell on the UpPTS.

The setting area in this step may be a TD-SCDMA cell.

Every three cells correspond to a base station, and there are multiple base stations with the same frequency in the set area, and the distance between the base stations is not less than 22.5Km to meet the conditions for interference between cells.

Signal transmission in a cell refers to sending and receiving signals through antennas in the cell.

For two cells (cell i and cell j), cell j transmits a signal on the DwPTS, and the signal reaches cell i on the UpPTS after a period of transmission, occupying part or all of the UpPTS of cell i; similarly, cell i will also be on the UpPTS The DwPTS transmits a signal, and the signal will also reach cell j on the UpPTS after a period of transmission, occupying part or all of the UpPTS of cell j.

Step 102: Use the cell whose sum of the received interference power is greater than the first threshold value as the interfered cell.

After step 101 is executed, it can be determined that any cell is interfered by other cells in the UpPTS, and then in step 102, the overall seriously interfered cell is located, which is called the interfered cell. The first threshold here can be determined according to empirical values.

Step 103: Determine the interfering source cell corresponding to each interfered cell.

The interference power of the interference source cell to the corresponding interfered cell is greater than a second threshold value, wherein the second threshold value is smaller than the first threshold value, and the second threshold value may also be determined according to empirical values.

Through the method of the first embodiment of the present invention, a model of inter-cell DwPTS and UpPTS transmission interference is established to accurately locate the interference source cell that seriously interferes with other cells.

Embodiment two:

As shown in FIG. 3 , it is a schematic diagram of a method for adjusting the antenna downtilt angle of a cell in Embodiment 2 of the present invention. The method in Embodiment 2 includes the following steps:

Step 201: In every two cells in the set area, determine the interference power of the signal transmitted by one cell on the DwPTS to the signal received by the other cell on the UpPTS.

Step 202: Use the cell whose sum of the received interference power is greater than the first threshold value as the interfered cell.

Step 203: Determine the interfering source cell corresponding to each interfered cell.

Step 204: Adjust the downtilt angle of the antenna of the interfering source cell.

After the antenna downtilt of the interference source cell is adjusted, the interference power to the corresponding interfered cell is smaller than the interference power to the corresponding interfered cell before the antenna downtilt is adjusted.

In order to reduce the interference between cells, it is necessary to adjust the antenna downtilt angle of the interference source cell, for example: by simulating multiple preset downtilt angles, determine a downtilt angle that can reduce the interference power to the corresponding interfered cell The downtilt angle is used to adjust the downtilt angle of the antenna of the interference source cell by using the determined downtilt angle.

Through the method of Embodiment 2 of the present invention, a model of inter-cell DwPTS and UpPTS transmission interference is established, and the antenna downtilt angle of the interferer cell is adjusted to replace the UpPTS Shifting technology to reduce the uplink synchronization interference of the interferer cell to the interfered cell. Since the second embodiment of the present invention locates and optimizes the UpPTS interference of the TD-SCDMA network cell, the UpPTS interference of the TD-SCDMA network is fundamentally reduced.

Each step of Embodiment 2 of the present invention will be described in detail below.

The way of modeling the interference power in step 201 is as follows:

Assuming that in step 201, it is necessary to determine the interference power of cell j to the UpPTS received signal of cell i when DwPTS transmits the signal, the calculation parameters may include the transmit power of the signal transmitted by cell j in DwPTS and the UpPTS occupied by the signal after reaching cell i duration. Specifically, the interference power is determined by the following formula (1) and formula (2):

I _i,j = Interference _i,j ×α _i,j (1)

Interference _i,j =P _DwPTS +Sectory _i _Gain+Sectory _j _Gain-Pathloss _ji (2)

Among them: I _{i, j} represents the interference power of the signal transmitted by cell j on the DwPTS to the signal received by cell i on the UpPTS, i and j are positive integers, and its value is 1 to the number of cells in the set area; α _{i, j} represents the duration of UpPTS occupied by the signal transmitted by cell j after reaching cell i; Interference _i,j represents the power of the signal transmitted by cell j when it reaches cell i; P _DwPTS represents the transmission power of cell _j ’s transmitted signal; Sectory _{j_Gain} represents the receiving gain of the antenna of cell i and the transmitting gain of the antenna of cell j; Pathloss _ji represents the path loss of the signal transmitted by cell j from cell j to cell i.

Assuming that the number of cells in the set area is M, after traversing any two cells in the M cells and executing formula (1) and formula (2), the interference matrix model shown in the following formula (3) can be obtained:

$\mathrm{<span\; class="notranslate">\; I</span>}<span\; class="notranslate">\; =</span>\left[\begin{array}{cccc}{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 11</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 12</span>}}& <span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}\mathrm{<span\; class="notranslate">\; m</span>}}\\ {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; twenty\; one</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; twenty\; two</span>}}& <span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>& {\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; m</span>}}\\ <span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>& <span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>& & <span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>\\ {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; m</span>}\mathrm{<span\; class="notranslate">\; 1</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; m</span>}\mathrm{<span\; class="notranslate">\; 2</span>}}& <span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; MM</span>}}\end{array}\right]<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

Wherein, I _i,i represent the interference power of the signal transmitted by the DwPTS of a certain cell to the signal received by the UpPTS.

In step 202, the above-mentioned interference matrix model can be used to determine the interfered cell, and the specific method is as follows:

First, the interference matrix model shown in formula (3) is traversed, and the elements of each row are summed to obtain $I_i=\underset{j=1}{\overset{m}{\mathrm{\&Sigma;}}}{I}_{i,j}.$

The sum of elements in each row represents the sum of interference power when a cell is interfered by other cells.

Then, the value obtained by summing the elements of each row is compared with the first threshold value, and the row numbers greater than the first threshold value are recorded.

Determine the interfered cell according to the recorded row number.

In this step, it is also possible to arrange the I _i in descending order, and select the largest N row numbers of the I _i , where N is a positive integer not greater than M.

In step 203, the specific manner of determining the interference source cell is as follows:

First, determine the row elements of the interfered cell in the matrix in formula (3).

Then, compare the element of the row with the second threshold value, if it is not greater than the second threshold value, it means that the interfering cell corresponding to the element has less interference with the interfered cell, and is not the interference source cell; Otherwise, it indicates that the interfering cell corresponding to this element is the interfering source cell.

After performing the above operations on each interfered cell, the interference source cell corresponding to each interfered cell can be obtained.

Steps 101 to 103 in the first embodiment are the same as steps 201 to 203 in the second embodiment.

Embodiment three:

Embodiment 3 of the present invention further adjusts the frequency point of the interference source cell after adjusting the downtilt angle of the interference source cell in Embodiment 2, so as to further reduce the uplink synchronization interference of the interference source base station to the corresponding cell.

As shown in FIG. 4 , it is a schematic diagram of the method in Embodiment 3 of the present invention, wherein Step 301 to Step 304 are the same as Step 201 and Step 204 in Embodiment 2.

Step 305: After adjusting the downtilt angle of the antenna of the interference source cell, when there is still relatively large uplink synchronization interference between the cells, adjust the frequency point of the interference source cell.

After the frequency point adjustment of the interference source cell, the interference power to the corresponding interfered cell is smaller than the interference power to the corresponding interfered cell before the frequency point adjustment.

After adjusting the antenna downtilt of the interfering source cell, there is still relatively large uplink synchronization interference between the cells. After the antenna downtilt angle is adjusted, the interference power to the corresponding interfered cell is greater than the second threshold value.

After executing steps 301 to 304, the interfered cell has been updated, that is, the sum of the interference power received by some cells of the interfered cell determined in step 302 due to the adjustment of the antenna downtilt angle of the corresponding interferer cell is less than the first A threshold value, therefore, this part of the cell is no longer the interfered cell.

If after the antenna downtilt of the interferer cell is adjusted, the interference power of the interferer cell to the corresponding interfered cell is still greater than the second set value, step 305 may be executed to further reduce the interference power received by the interfered cell.

In the second embodiment, the specific way to adjust the frequency point of the interference source cell is as follows:

Step 1: Determine the set of available frequency points of the interference source cell.

In this embodiment, each cell has an available frequency point set, which includes multiple frequency points. An available frequency point set including three frequency points is set in the existing network, and the frequency point used by each cell in the network is one of the three frequency points.

Step 2: Determine the interference power of the interference source cell to the corresponding interfered cell when the interference source cell uses the unused frequency points respectively for the frequency points not used by the current interference source cell in the available frequency point set.

In this step, other frequency points not used by the current interfering source cell in the set of available frequency points are traversed, and interference power caused to corresponding cells when other frequency points are used are respectively determined.

Step 3: Comparing the interference power of the interferer cell to the corresponding interfered cell when using the unused frequency point and the interference power of the interferer cell to the corresponding interfered cell before frequency adjustment.

The purpose of this step is to check whether the interference power to the corresponding cell can be reduced when other frequencies are used. If the interference power can be reduced, frequency adjustment is required; otherwise, frequency adjustment is not necessary.

Step 4: Determine an unused frequency point according to the comparison result, and use the determined unused frequency point to adjust the frequency point of the interference source cell.

The interference power of the interferer cell to the corresponding interfered cell after frequency adjustment is smaller than the interference power of the interferer cell to the corresponding interfered cell before frequency adjustment.

If it is found that there are multiple adjustable frequency points according to the comparison result in the third step, one of them can be selected, or the frequency point with the smallest interference power of the interference source cell to the corresponding interfered cell can be selected.

Furthermore, Embodiment 2 of the present invention also considers that after the frequency point of an interfering source cell is adjusted, the frequency points of the other two cells belonging to the same base station as the interfering source cell also need to be adjusted, and at the same time it is required to adjust the frequency points of the interfering source cell. The frequency points and the frequency points of the other two cells are adjusted to be different in pairs, so as to avoid the problem of strong interference between cells using the same frequency point.

Specifically, the frequency point adjustment process for the other two cells belonging to the same base station as the interference source cell in the second embodiment is as follows:

Step 1: Determine the first cell and the second cell among the other two cells.

The first cell and the second cell meet the following two conditions:

The first condition: the number of adjacent cells of the first cell is greater than the number of adjacent cells of the second cell.

The second condition: the average value of the main lobe angle between the first cell and the adjacent cell is greater than the average value of the main lobe angle between the second cell and the adjacent cell.

Since the first cell has the above-mentioned characteristics, it is necessary to determine an adjusted frequency point for the first cell first, so as to ensure that the first cell can select an optimal frequency point compared with the second cell.

Step 2: Determine the frequencies used by the neighboring cells of the first cell.

Preferably, the neighbor cells of the first cell involved in this step are cells that have co-frequency multiplexing exclusion with the first cell.

Step 3: For each frequency point in the set of available frequency points except for the frequency point adjusted by the interfering source cell, determine the frequency points used in the adjacent cells of the first cell and the frequency point used in the set of available frequency points except for the interfering source cell The number of neighboring cells that are different from one frequency point other than the adjusted frequency point.

Step 4: Select a frequency point from the set of available frequency points except the frequency point adjusted by the interfering source cell as the frequency point to be adjusted by the first cell, where: in the neighboring cells of the first cell, use The number of adjacent cells whose frequency point is different from the selected frequency point is the largest.

Since there is less interference when the frequency points of the cells are different, this step hopes to find a frequency point for the first cell, so that the cells adjacent to the first cell can use the frequency point of the first cell as little as possible, and also That is to say, after the frequency point of the first cell is adjusted, it is different from the frequency points of as many adjacent cells as possible, so as to achieve the purpose of reducing interference.

Step 5: Select a frequency point from the set of available frequency points except the frequency point that needs to be adjusted as the interference source cell and the frequency point that needs to be adjusted as the first cell, as the frequency point that needs to be adjusted in the second cell point.

Through the scheme of the second embodiment of the present invention, the synchronization interference of UpPTS between cells is further reduced. When adjusting the frequency point of the cell, the frequency points of the other two cells of the same base station are also adjusted to avoid additional interference.

Embodiment four:

Embodiment 4 of the present invention describes the solutions of Embodiment 2 and Embodiment 3 of the present invention through specific examples.

Assume that there are 6 cells in the setting area in the fourth embodiment, which are cell 1 to cell 6, cell 1 to cell 3 belong to the cell under the same base station, cell 4 to cell 6 belong to the cell under the same base station, and each The sets of available frequency points of each cell are the same, and the set of available frequency points F={F1, F2, F3}.

The scheme of Embodiment 4 of the present invention is as follows:

Step 1: Determine the transmit power of the cell in DwPTS, the path loss between the two cells, the horizontal gain and the vertical gain of each cell, and use formula (1) and formula (2) to get the Interference power model between, as shown in formula (4).

$\mathrm{<span\; class="notranslate">\; I</span>}<span\; class="notranslate">\; =</span>\left[\begin{array}{cccccc}{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 11</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 12</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 13</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 14</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 15</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 16</span>}}\\ {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; twenty\; one</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; twenty\; two</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; twenty\; three</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; twenty\; four</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 25</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 26</span>}}\\ <span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>& <span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>& & <span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span>& & \\ {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 61</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 62</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 63</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 64</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 65</span>}}& {\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; 66</span>}}\end{array}\right]<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; )</span>$

Step 2: By summing the elements in each row of formula (4), it is determined that cell 1 and cell 5 are interfered cells.

Step 3: Compare the elements in the first row and the fifth row in the formula (4) with the second set value, set the elements smaller than the second set value to 0, and set the elements not less than the second set value The elements are unchanged, and the following two matrices are obtained:

I ₁ =[0 0 0 I ₁₄ 0 I ₁₆ ]

I ₅ =[0 0 I ₅₃ 0 0 0]

The above two matrices indicate that the interference source cells corresponding to the interfered cell 1 are cell 4 and cell 6 , and the interference source cell corresponding to the interfered cell 5 is cell 3 .

Step 4: In order to reduce the interference received by the interfered cell 1, it is necessary to adjust the antenna downtilt angle of the interferer cell 4, and then determine that the interference power of the cell 4 to the cell 1 is not greater than the second threshold value, the cell 4 needs to be adjusted Lower inclination. Assuming that the antenna downtilt angle of cell 4 before adjustment is α, it is determined through the simulation test that when the antenna downtilt angle of cell 4 is adjusted to β, the interference power to cell 1 can be reduced, and the antenna downtilt angle of cell 4 is adjusted to β .

The method for adjusting the antenna downtilt of cell 6 is the same as the method for adjusting the antenna downtilt of cell 4 .

Similarly, in order to reduce the interference received by cell 5, the downtilt angle of the antenna of cell 3 is adjusted.

Assume that after the downtilt adjustment, the sum of the interference power received by cell 1 is less than the first threshold value, therefore, cell 1 is no longer the interfered cell; and the sum of the interference power received by cell 5 is still not less than the first threshold value , you need to perform subsequent frequency point adjustment operations.

Step 6: Assume that the frequency point currently used by the interference source cell 3 is F1, and the interference power to the interfered cell 5 is I _F1 , and the frequency point of the cell 3 can be adjusted to F2 or F3.

Step 7: When the interference source cell 3 uses the frequency point F2, the interference power to the interfered cell 5 is I _F2 ; when the interference source cell 3 uses the frequency point F3, the interference power to the interfered cell 5 is I _F3 .

Step 8: Determine the adjusted frequency point of the interference source cell 3 according to the following three comparison results:

1. If I _F1 ≤ I _F2 and I _F1 ≤ I _F3 , it means that the frequency point F1 used by the interference source cell 3 has the smallest interference power to the interfered cell 5, and there is no need to adjust the frequency point;

2. I _F2 <I _F1 ≤ I _F3 || I _F2 <I _F3 ≤ I _F1 , which means that the frequency point F2 used by the interference source cell 3 has the smallest interference power to the interfered cell 5, and the frequency point of the interference source cell 3 is adjusted to F2 ;

3. I _F3 <I _F1 ≤ I _F2 ||I _F3 <I _F2 ≤ I _F1 , which means that the frequency point F3 used by the interference source cell 3 has the smallest interference power on the interfered cell 5, and the frequency point of the interference source cell 3 is adjusted to F3 .

Step 9: Adjust the frequency point of the interference source cell 3 from F1 to F3.

Step 10: Cell 1-Cell 3 are located in the same base station. Therefore, when the frequency used by Cell 3 is adjusted, the frequencies of Cell 1 and Cell 2 also need to be adjusted.

Step 11: Assume that the number of adjacent cells of cell 1 is greater than the number of adjacent cells of cell 2, and the average value of the main lobe angle between cell 1 and adjacent cells is greater than the average value of main lobe angles between cell 2 and adjacent cells.

Step 12: Determine the set W of cells that have co-frequency multiplexing exclusion with cell 1.

Assuming that cell 6 is a cell in set W, cell 6 needs to meet the following two conditions:

First condition:

The distance between cell 1 and cell 6 is not greater than the maximum interference distance of cell 1 or the maximum interference distance of cell 6, that is, the distance between cell 1 and cell 6 must satisfy formula (5):

Distance(1,6)≤max(D ₁ ,D ₆ ) (5)

Among them: Distance(1,6) represents the distance between cell 1 and cell 6; D ₁ represents the maximum interference distance of cell 1; D ₆ represents the maximum interference distance of cell 6.

Second condition:

The area of cell 1 overlaps with the area of cell 6, that is, the formula group (6) must be satisfied between cell 1 and cell 6:

$\left\{\begin{array}{c}<span\; class="notranslate">\; |</span>\mathrm{<span\; class="notranslate">\; Bearing</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Bearing</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; |</span><span\; class="notranslate">\; \&le;</span>\mathrm{<span\; class="notranslate">\; 0.5</span>}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; HBWD</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; HBWD</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>\\ <span\; class="notranslate">\; |</span>\mathrm{<span\; class="notranslate">\; Bearing</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Bearing</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; |</span><span\; class="notranslate">\; \&Greater\; Equal;</span>\mathrm{<span\; class="notranslate">\; 360</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 0.5</span>}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; HBWD</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; HBWD</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>\\ <span\; class="notranslate">\; |</span>\mathrm{<span\; class="notranslate">\; angle</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1,6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Bearing</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; |</span><span\; class="notranslate">\; \&le;</span>\mathrm{<span\; class="notranslate">\; 0.5</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; HBWD</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>\\ <span\; class="notranslate">\; |</span>\mathrm{<span\; class="notranslate">\; angle</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1,6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Bearing</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; |</span><span\; class="notranslate">\; \&Greater\; Equal;</span>\mathrm{<span\; class="notranslate">\; 360</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 0.5</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; HBWD</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>\\ <span\; class="notranslate">\; |</span>\mathrm{<span\; class="notranslate">\; angle</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1,6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Bearing</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; |</span><span\; class="notranslate">\; \&le;</span>\mathrm{<span\; class="notranslate">\; 0.5</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; HBWD</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span>\\ <span\; class="notranslate">\; |</span>\mathrm{<span\; class="notranslate">\; angle</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1,6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Bearing</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; |</span><span\; class="notranslate">\; \&Greater\; Equal;</span>\mathrm{<span\; class="notranslate">\; 306</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 0.5</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; HBWD</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span>\end{array}\right.<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span>$

Among them: Bearing(1) represents the antenna azimuth angle of cell 1; Bearing(6) represents the antenna azimuth angle of cell 6; Angle(1,6) represents the angle between the antennas of cell 1 and cell 6; HBWD(1) represents cell 1 The antenna horizontal lobe width of the antenna; HBWD(6) represents the antenna horizontal lobe width of cell 6.

Step 13: Determine the frequency points of each cell in the cell set W, assuming that there are 3 cells in the cell set W, and their frequencies are respectively {F3, F2, F3}.

Step 14: Since cell 3 has already used frequency point F3, the optional frequency point for cell 1 is F1 or F2. If cell 1 chooses frequency point F1, the number of cells in the cell set W that is different from the frequency point of cell 1 is 3; if cell 1 chooses frequency point F2, then the number of cells in the cell set W that is different from the frequency point of cell 1 is 2. Therefore, in order to reduce the occurrence of the same frequency in adjacent cells, the frequency point of cell 1 is adjusted to F1.

Step 15: Use the last unused frequency point F2 as the frequency point to be adjusted in cell 2, and adjust the frequency point in cell 2 to F2.

Embodiment five:

Embodiment 5 of the present invention also provides a device for determining an UpPTS interference source cell. As shown in FIG. 5 , the device includes an interference power determination module 11, an interfered cell determination module 12, and an interference source cell determination module 13, wherein: The power determination module 11 is used to determine the interference power of the signal transmitted by one of the cells in the downlink pilot time slot DwPTS to the signal received by the other cell on the UpPTS in every two cells in the set area; the interfered cell determination module 12 is used to use the cell whose sum of the interference power received is greater than the first threshold value as the interfered cell; the interference source cell determination module 13 is used to respectively determine the interference source cell corresponding to each interfered cell, and the interference source cell is The interference power of the corresponding interfered cell is greater than a second threshold, and the first threshold is greater than the second threshold.

The interference power determination module 11 is also used to determine that another cell is on the UpPTS according to the transmission power of the signal transmitted by one cell on the DwPTS and the duration of the UpPTS occupied by the signal after reaching the other cell in every two cells. The interference power of the received signal.

The interference power determination module 11 is also used to determine the interference power of the signal received by the other cell on the UpPTS by the following two formulas:

I _i,j =Interference _i,j ×α _i,j

Interference _i,j =P _DwPTS +Sectory _i _Gain+Sectory _j _Gain-Pathloss _ji

Among them: I _{i, j} represents the interference power of the signal transmitted by cell j on DwPTS to the signal received by cell i on _Up PTS, i and j are positive integers, and their value is 1 ~ the number of cells in the set area; α _{i, j} represent the duration of UpPTS occupied by the signal transmitted by cell j after reaching cell i; Interference _{i, j} represents the power of the signal transmitted by cell j when it reaches cell i; P _DwPTS represents the transmission power of the signal transmitted by cell j; Sector _i _Gain and Sectory _j _Gain represent the antenna receiving gain of cell i and the antenna transmitting gain of cell j respectively; Pathloss _ji represents the path loss of the signal transmitted by cell j from cell j to cell i.

Embodiment six:

Embodiment 6 of the present invention also provides a device for adjusting the antenna downtilt angle of a cell, as shown in Figure 6(a), the device includes an interference power determination module 21, an interfered cell determination module 22, and an interference source cell determination module 23 And the first adjustment module 24, wherein: the interference power determination module 21 is used to determine the interference power of the signal transmitted by one of the cells on the DwPTS to the signal received by the other cell on the UpPTS in every two cells in the set area; The interfered cell determination module 22 is used to determine the interfered cell with the sum of the received interference power greater than the first threshold value as the interfered cell; the interfered source cell determined module 23 is used to respectively determine the interfered source cell corresponding to each interfered cell, so The interference power of the interference source cell to the corresponding interfered cell is greater than a second threshold value, and the first threshold value is greater than the second threshold value; the first adjustment module 24 is used to adjust the antenna downtilt angle of the interference source cell, Wherein: after the antenna downtilt of the interference source cell is adjusted, the interference power to the corresponding interfered cell is smaller than the interference power to the corresponding interfered cell before the antenna downtilt is adjusted.

The interference power determination module 21 is also used to determine that another cell is on the UpPTS according to the transmission power of the signal transmitted by one cell on the DwPTS and the duration of the UpPTS occupied by the signal after reaching the other cell in every two cells. The interference power of the received signal.

The interference power determination module 21 is also used to determine the interference power of the signal received by the other cell on the UpPTS by the following two formulas:

I _i,j =Interference _i,j ×α _i,j

Interference _i,j =P _DwPTS +Sectory _i _Gain+Sectory _j _Gain-Pathloss _ji

Among them: I _{i, j} represents the interference power of the signal transmitted by cell j on the DwPTS to the signal received by cell i on the UpPTS, i and j are positive integers, and its value is 1 to the number of cells in the set area; α _{i, j} represents the duration of UpPTS occupied by the signal transmitted by cell j after reaching cell i; Interference _i,j represents the power of the signal transmitted by cell j when it reaches cell i; P _DwPTS represents the transmission power of cell _j ’s transmitted signal; Sectory _{j_Gain} represents the receiving gain of the antenna of cell i and the transmitting gain of the antenna of cell j; Pathloss _ji represents the path loss of the signal transmitted by cell j from cell j to cell i.

The device for adjusting the antenna downtilt of the cell also includes a second adjustment module 25, which is used to adjust the antenna downtilt of the interference source cell to a set angle, and adjust the antenna downtilt of the interference source cell to the corresponding interfered cell. When the interference power of the interference source cell is greater than the second threshold value, the frequency point of the interference source cell is further adjusted. After the frequency point adjustment of the interference source cell, the interference power to the corresponding interfered cell is less than the corresponding interference power before the frequency point adjustment. The interference power of the cell.

The device for adjusting the antenna downtilt angle of the cell also includes a third adjustment module 26, configured to determine the other two cells that belong to the same base station as the interference source cell, and determine the other two cells from the set of available frequency points. A cell needs to adjust the frequency point, and use the determined frequency point to adjust the other two cells, wherein: adjusting the frequency point of the interference source cell is different from adjusting the frequency point of the other two cells.

As shown in Figure 6(b), the second adjustment module 25 includes: a use submodule 31, a comparison submodule 32, and a determination submodule 33, wherein: the use submodule 31 is used to determine the set of available frequency points of the interference source cell , and for the frequency points not used by the current interference source cell in the available frequency point set, determine the interference power of the interference source cell to the corresponding interfered cell when using the unused frequency point; the comparison submodule 32 It is used to compare the interference power of the interference source cell to the corresponding interfered cell when using the unused frequency point and the interference power of the interference source cell to the corresponding interference cell before frequency adjustment; the determiner Module 33 is used to determine an unused frequency point according to the comparison result, and use the determined unused frequency point to adjust the frequency point of the interference source cell, wherein: the interference source cell is adjusted to the corresponding victim after the frequency point adjustment The interference power of the interfering cell is smaller than the interference power of the interfering cell to the corresponding interfered cell before the frequency point adjustment is performed.

As shown in Figure 6(c), the third adjustment module 26 includes: a cell division submodule 41, a submodule 42 for determining the number of adjacent cells, a first operation submodule 43, and a second operation submodule 44, wherein: small division The molecular module 41 is used to determine the first cell and the second cell in the other two cells, wherein: the number of adjacent cells of the first cell is greater than the number of adjacent cells of the second cell, and the number of adjacent cells of the first cell and the adjacent cell The average value of the included angle of the main lobe is greater than the average value of the included angle of the main lobe between the second cell and the adjacent cell; Frequency points, respectively determine the number of neighboring cells whose frequency points are different from one frequency point in the set of available frequency points except the frequency point adjusted by the interference source cell in the adjacent cells of the first cell; the first operation submodule 43 It is used to select a frequency point from other frequency points in the set of available frequency points except the frequency point adjusted by the interfering source cell as the frequency point to be adjusted by the first cell, where the frequency point used in the neighboring cells of the first cell The number of adjacent cells different from the selected frequency point is the largest; the second operation submodule 44 is used to remove the frequency point that needs to be adjusted as the interference source cell and the frequency point that needs to be adjusted as the first cell from the available frequency point set Select a frequency point from other frequency points as the frequency point that needs to be adjusted in the second cell.

Embodiment 6 of the present invention is a general description of the device for adjusting the downtilt angle of the antenna of the cell. The device for adjusting the downtilt angle of the antenna of the cell according to the embodiment of the present invention may also include a logic module for implementing the schemes of Embodiment 2 to Embodiment 4.

Through the method and equipment provided by the embodiment of the present invention, by establishing the inter-cell DwPTS and UpPTS transmission interference model, the interference source cell with serious interference to other cells can be accurately located; The frequency point adjustment scheme replaces the UpPTSShifting scheme to reduce uplink synchronization interference; at the same time, the embodiment of the present invention locates and optimizes the interference of DwPTS to UpPTS between cells in a TD-SCDMA network, which fundamentally reduces the uplink of the TD-SCDMA network. Synchronization interference.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (21)

1. A method for determining an uplink pilot time slot UpPTS interference source cell, characterized in that the method comprises: In every two cells in the set area, determine the interference power of the signal transmitted by one cell in the downlink pilot time slot DwPTS to the signal received by the other cell in UpPTS; Taking the cell whose sum of the received interference power is greater than the first threshold value as the interfered cell; An interference source cell corresponding to each interfered cell is respectively determined, the interference power of the interference source cell to the corresponding interfered cell is greater than a second threshold, and the first threshold is greater than the second threshold. 2. The method of claim 1, wherein In every two cells, according to the transmission power of the signal transmitted by one cell on the DwPTS and the duration of the UpPTS occupied by the signal after reaching the other cell, the interference power of the signal received by the other cell on the UpPTS is determined. 3. The method according to claim 2, characterized in that, the interference power of the signal received by the other cell on the UpPTS is determined by the following two formulas: I _i,j =Interference _i,j ×α _i,j Interference _i,j =P _DwPTS +Sectory _i _Gain+Sectory _j _Gain-Pathloss _ji Among them: I _{i, j} represents the interference power of the signal transmitted by cell j on the DwPTS to the signal received by cell i on the UpPTS, i and j are positive integers, and its value is 1 to the number of cells in the set area; α _{i, j} represents the duration of UpPTS occupied by the signal transmitted by cell j after reaching cell i; Interference _i,j represents the power of the signal transmitted by cell j when it reaches cell i; P _DwPTS represents the transmission power of cell _j ’s transmitted signal; Sectory _{j_Gain} represents the receiving gain of the antenna of cell i and the transmitting gain of the antenna of cell j; Pathloss _ji represents the path loss of the signal transmitted by cell j from cell j to cell i. 4. A method for adjusting the antenna downtilt of the cell, characterized in that the method comprises: In every two cells in the set area, determine the interference power of the signal transmitted by one cell in the downlink pilot time slot DwPTS to the signal received by the other cell in the uplink pilot time slot UpPTS; Taking the cell whose sum of the received interference power is greater than the first threshold value as the interfered cell; Respectively determine the interference source cell corresponding to each interfered cell, the interference power of the interference source cell to the corresponding interfered cell is greater than a second threshold value, and the first threshold value is greater than the second threshold value; Adjusting the antenna downtilt of the interference source cell, wherein: after the antenna downtilt of the interference source cell is adjusted, the interference power to the corresponding interfered cell is smaller than the interference power to the corresponding interfered cell before the antenna downtilt is adjusted. 5. The method of claim 4, wherein, In every two cells, according to the transmission power of the signal transmitted by one cell on the DwPTS and the duration of the UpPTS occupied by the signal after reaching the other cell, the interference power of the signal received by the other cell on the UpPTS is determined. 6. The method according to claim 5, characterized in that, the interference power of the signal received by the other cell on the UpPTS is determined by the following two formulas: I _i,j =Interference _i,j ×α _i,j Interference _i,j =P _DwPTS +Sectory _i _Gain+Sectory _j _Gain-Pathloss _ji Among them: I _{i, j} represents the interference power of the signal transmitted by cell j on the DwPTS to the signal received by cell i on the UpPTS, i and j are positive integers, and its value is 1 to the number of cells in the set area; α _{i, j} represents the duration of UpPTS occupied by the signal transmitted by cell j after reaching cell i; Interference _i,j represents the power of the signal transmitted by cell j when it reaches cell i; P _DwPTS represents the transmission power of cell _j ’s transmitted signal; Sectory _{j_Gain} represents the receiving gain of the antenna of cell i and the transmitting gain of the antenna of cell j; Pathloss _ji represents the path loss of the signal transmitted by cell j from cell j to cell i. 7. The method according to any one of claims 4 to 6, wherein after adjusting the downtilt angle of the antenna of the interference source cell, the method further comprises: When the antenna downtilt of the interference source cell is adjusted to a set angle, and the interference power of the corresponding interfered cell is greater than the second threshold after the antenna downtilt of the interference source cell is adjusted, the frequency point of the interference source cell is further adjusted, After the frequency point adjustment of the interference source cell, the interference power to the corresponding interfered cell is smaller than the interference power to the corresponding interfered cell before the frequency point adjustment. 8. The method according to claim 7, wherein adjusting the frequency point of the interference source cell comprises: Determining the set of available frequency points of the interferer cell, and for the frequency points not used by the current interferer cell in the set of available frequency points, determine that when the interferer cell uses the unused frequency points, the corresponding interfered The interference power of the cell; Comparing the interference power of the interferer cell to the corresponding interfered cell when using the unused frequency point and the interference power of the interferer cell to the corresponding interfered cell before frequency adjustment; Determine an unused frequency point according to the comparison result, and use the determined unused frequency point to adjust the frequency point of the interference source cell, wherein: the interference source cell interferes with the corresponding interfered cell after the frequency point adjustment The power is smaller than the interference power of the interference source cell to the corresponding interfered cell before the frequency point adjustment is performed. 9. The method of claim 8, wherein The determined unused frequency point is: the frequency point at which the interference power of the interference source cell to the corresponding interfered cell is the smallest. 10. The method according to claim 8, wherein after adjusting the frequency point of the interference source cell, the method further comprises: determining the other two cells that belong to the same base station as the interference source cell, and determining the frequency points that need to be adjusted by the other two cells from the set of available frequency points, and using the determined frequency points to adjust the other two cells, Wherein: adjusting the frequency point of the interference source cell is different from adjusting the frequency points of the other two cells. 11. The method according to claim 10, wherein determining the frequency points that need to be adjusted in the other two cells comprises: Determining the first cell and the second cell among the other two cells, wherein: the number of adjacent cells of the first cell is greater than the number of adjacent cells of the second cell, and the main lobe angle between the first cell and the adjacent cells is average The value is greater than the average value of the main lobe angle between the second cell and the adjacent cell; For each frequency point in the set of available frequency points except the frequency point adjusted by the interfering source cell, respectively determine the frequency point used in the adjacent cell of the first cell and the frequency point adjusted by the interfering source cell in the set of available frequency points The number of adjacent cells with a different frequency point other than ; Select a frequency point from other frequency points in the set of available frequency points except the frequency point adjusted by the interfering source cell as the frequency point to be adjusted by the first cell, wherein, in the adjacent cells of the first cell, the used frequency points are the same as Select the largest number of adjacent cells with different frequencies; Select a frequency point from the set of available frequency points except the frequency point that needs to be adjusted for the interference source cell and the frequency point that needs to be adjusted for the first cell, as the frequency point that needs to be adjusted for the second cell. 12. A device for determining an uplink pilot time slot UpPTS interference source cell, characterized in that the device includes: The interference power determination module is used to determine the interference power of the signal transmitted by one cell in the downlink pilot time slot DwPTS to the signal received by the other cell in the UpPTS in every two cells in the set area; The interfered cell determination module is configured to use the cell whose sum of the received interference power is greater than the first threshold value as the interfered cell; An interference source cell determination module, configured to determine an interference source cell corresponding to each interfered cell, the interference power of the interference source cell to the corresponding interfered cell is greater than a second threshold value, and the first threshold value is greater than second threshold. 13. The apparatus of claim 12, wherein The interference power determination module is also used to determine that another cell is on the UpPTS according to the transmission power of the signal transmitted by one cell on the DwPTS and the duration of the UpPTS occupied by the signal after reaching the other cell in every two cells. The interference power of the received signal. 14. The apparatus of claim 13, wherein The interference power determination module is also used to determine the interference power of the signal received by the other cell on the UpPTS by the following two formulas: I _i,j =Interference _i,j ×α _i,j Interference _i,j =P _DwPTS +Sectory _i _Gain+Sectory _j _Gain-Pathloss _ji Among them: I _{i, j} represents the interference power of the signal transmitted by cell j on the DwPTS to the signal received by cell i on the UpPTS, i and j are positive integers, and its value is 1 to the number of cells in the set area; α _{i, j} represents the duration of UpPTS occupied by the signal transmitted by cell j after reaching cell i; Interference _i,j represents the power of the signal transmitted by cell j when it reaches cell i; P _DwPTS represents the transmission power of cell _j ’s transmitted signal; Sectory _{j_Gain} represents the receiving gain of the antenna of cell i and the transmitting gain of the antenna of cell j; Pathloss _ji represents the path loss of the signal transmitted by cell j from cell j to cell i. 15. A device for adjusting the antenna downtilt of a cell, characterized in that the device comprises: The interference power determination module is used to determine the interference power of the signal transmitted by one cell in the downlink pilot time slot DwPTS to the signal received by the other cell in the uplink pilot time slot UpPTS in every two cells in the set area ; An interfered cell determination module, configured to use a cell whose sum of the received interference power is greater than a first threshold value as an interfered cell; An interference source cell determination module, configured to determine an interference source cell corresponding to each interfered cell, the interference power of the interference source cell to the corresponding interfered cell is greater than a second threshold value, and the first threshold value is greater than second threshold value; The first adjustment module is used to adjust the antenna downtilt of the interference source cell, wherein: after the antenna downtilt of the interference source cell is adjusted, the interference power to the corresponding interfered cell is less than that to the corresponding interfered cell before the antenna downtilt adjustment The interference power of the cell. 16. The apparatus of claim 15, wherein The interference power determination module is also used to determine that another cell is on the UpPTS according to the transmission power of the signal transmitted by one cell on the DwPTS and the duration of the UpPTS occupied by the signal after reaching the other cell in every two cells. The interference power of the received signal. 17. The apparatus of claim 16, wherein The interference power determination module is also used to determine the interference power of the signal received by the other cell on the UpPTS by the following two formulas: I _i,j =Interference _i,j ×α _i,j Interference _i,j =P _DwPTS +Sectory _i _Gain+Sectory _j _Gain-Pathloss _ji Among them: I _{i, j} represents the interference power of the signal transmitted by cell j on the DwPTS to the signal received by cell i on the UpPTS, i and j are positive integers, and its value is 1 to the number of cells in the set area; α _{i, j} represents the duration of UpPTS occupied by the signal transmitted by cell j after reaching cell i; Interference _i,j represents the power of the signal transmitted by cell j when it reaches cell i; P _DwPTS represents the transmission power of cell _j ’s transmitted signal; Sectory _{j_Gain} represents the receiving gain of the antenna of cell i and the transmitting gain of the antenna of cell j; Pathloss _ji represents the path loss of the signal transmitted by cell j from cell j to cell i. 18. The device according to any one of claims 15-17, wherein the device for adjusting the antenna downtilt of the cell further comprises: The second adjustment module is used to further adjust when the antenna downtilt angle of the interference source cell is adjusted to a set angle, and the interference power of the corresponding interfered cell is greater than the second threshold after the antenna downtilt angle of the interference source cell is adjusted. The frequency point of the interference source cell. After the frequency point adjustment of the interference source cell, the interference power to the corresponding interfered cell is smaller than the interference power to the corresponding interfered cell before the frequency point adjustment. 19. The device of claim 18, wherein the second adjustment module comprises: Use sub-modules for determining the set of available frequency points of the interfering source cell, and respectively for the frequency points not used by the current interfering source cell in the available frequency point set, determine when the interfering source cell uses the unused frequency points , the interference power of the corresponding interfered cell; The comparison sub-module is used to respectively compare the interference power of the interferer cell to the corresponding interfered cell when using the unused frequency point and the interference power of the interferer cell to the corresponding interfered cell before frequency adjustment Compare; The determining submodule is used to determine an unused frequency point according to the comparison result, and adjust the frequency point of the interference source cell by using the determined unused frequency point, wherein: the interference source cell corresponds to the frequency point after the adjustment of the frequency point The interference power of the interfered cell is less than the interference power of the interference source cell to the corresponding interfered cell before the frequency point adjustment is performed. 20. The device according to claim 19, wherein the device for adjusting the antenna downtilt of the cell further comprises: The third adjustment module is configured to determine the other two cells that belong to the same base station as the interference source cell, and determine the frequency points that need to be adjusted by the other two cells from the set of available frequency points, and use the determined frequency point adjust the other two cells, wherein: adjusting the frequency of the interference source cell is different from adjusting the frequency of the other two cells. 21. The device according to claim 20, wherein the third adjustment module comprises: The cell division submodule is used to determine the first cell and the second cell among the other two cells, wherein: the number of adjacent cells of the first cell is greater than the number of adjacent cells of the second cell, and the number of adjacent cells of the first cell is greater than that of the adjacent cell. The average value of the included angle of the main lobe of the cell is greater than the average value of the included angle of the main lobe of the second cell and the adjacent cell; The submodule for determining the number of neighboring cells is used to determine the frequency points used and the set of available frequency points in the neighboring cells of the first cell for each frequency point in the set of available frequency points except for the frequency point adjusted by the interference source cell The number of neighboring cells with a different frequency except the frequency adjusted by the interfering source cell; The first operation submodule is used to select a frequency point from other frequency points in the available frequency point set except the frequency point adjusted by the interference source cell as the frequency point to be adjusted by the first cell, wherein the neighbors of the first cell In the cell, the number of adjacent cells whose frequency point is different from the selected frequency point is the largest; The second operation sub-module is used to select a frequency point from the set of available frequency points, except for the frequency point that needs to be adjusted as the interference source cell and the frequency point that needs to be adjusted as the first cell, as the second cell The frequency point that needs to be adjusted.

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