CN105933933B - The method and apparatus for obtaining the total interference value of PCI based on co-frequency cell detection ratio - Google Patents
The method and apparatus for obtaining the total interference value of PCI based on co-frequency cell detection ratio Download PDFInfo
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Abstract
The present invention relates to a kind of method and apparatus for obtaining the total interference value of cell PCI based on co-frequency cell detection ratio.The method includes the steps: co-frequency cell MR detection ratio is obtained according to MR data；Main service road coverage cell is determined according to the frequency sweep data of road；According to the sub-sampling point of the total sampled point and the first RSRP difference of the main service channel coverage cell within a preset range, co-frequency cell Road Detection ratio is obtained；Maximum value in the co-frequency cell MR detection ratio and the co-frequency cell Road Detection ratio is determined as the co-frequency cell detection ratio that serving cell detects the homogeneous-frequency adjacent-domain of the serving cell；The total interference value of PCI of the serving cell is obtained according to the co-frequency cell detection ratio and PCI interference coefficient.The present invention can effectively solve the problem that the excessively mechanical and unilateral defect of existing assessment PCI quality method.
Description
Technical Field
The present invention relates to the LTE (Long Term Evolution of the universal mobile telecommunications technology) network technology field, and in particular, to a method for obtaining a PCI total interference value based on a co-frequency cell detection ratio and a device for obtaining a PCI total interference value based on a co-frequency cell detection ratio.
Background
The PCI (physical-layer identity) is used to distinguish wireless signals of different cells, and the value range is 0 to 503. Current PCI planning generally follows the following constraints:
(1) the PCI of different cells under the same base station is different modulo 3, namely mod (PCI1,3) ≠ mod (PCI2, 3);
(2) the remainder of the neighbor cell PCI modulo 6 is different, i.e., mod (PCI1,6) ≠ mod (PCI2, 6);
(3) PCI among all adjacent cells is unequal, namely PCI1) ≠ PCI 2;
(4) the neighbor cell PCI modulo 30 remainder is different, namely mod (PCI1,30) ≠ mod (PCI2, 30).
Although various conflicts should be avoided as much as possible in the PCI planning, due to the complexity of the real network environment, various conflicts always exist in practical applications. The quality of LTE networks is currently generally evaluated by PCI mod3 collisions, PCI mod6 collisions, and PCI mod30 collisions. The interference that can be evaluated for each type of collision is as follows:
(1) PCI mod3 collision is used to evaluate P-SS interference: in the LTE network, PCI is 3 Group ID (S-SS) + SectorID (P-SS), and if PCI mod3 has the same value, P-SS interference is caused;
(2) PCI mod6 collision is used to evaluate downlink RS (Reference Signal) interference: under the condition of fixed time domain position, the downlink reference signals have 6 freq shifts (frequency offsets) in the frequency domain, and if the PCI mod6 values are the same, the downlink RS can be interfered with each other;
(3) PCI mod30 collision is used to evaluate the interference of uplink DMRS (user specific reference Signal) and SRS (sounding reference Signal) signals: the information of DMRS and SRS is carried in PUSCH (Physical Uplink shared channel), the two reference signals are important for channel estimation and demodulation, and they are formed by 30 basic ZC sequences, that is, 30 different sequence combinations, which may cause mutual interference between the Uplink DM-RS and SRS (under a TXantenna) if the values of pci mod30 are the same.
Various interferences are often embodied individually in practical application, and no definition of a PCI total interference value exists in a public standard, so each manufacturer generally has a PCI total interference value calculation method, and when the PCI total interference value obtained by the existing method is used for evaluating the quality of the PCI in the whole network, the following defects exist:
(1) methods for evaluating PCI quality mechanical: it can only be mechanically reflected whether there is a mod3, mod6, and mod30 collision between two cells, but the magnitude of the impact cannot be evaluated. For example, the correlation between two cells is 1% and the correlation between two cells is 80%, assuming mod3 interference exists, the influence on the correlation between two cells being 80% is significantly greater than the influence on the correlation between two cells being only 1%;
(2) the PCI quality assessment method comprises the following steps: it is necessarily the best if all associated cells have no mod3, mod6, mod30 collision, but the complex network environment cannot avoid the existence of various types of collisions, and under the condition that the collisions cannot be avoided, the current technical scheme cannot determine whether the allocated PCIs a single mod3 collision good or a single mod6 collision good or a single mod30 collision good.
Disclosure of Invention
Therefore, in order to solve the above problems, it is necessary to provide a method and an apparatus for obtaining a PCI total interference value based on a co-frequency cell detection ratio, which can effectively solve the mechanical and one-sided defects of the existing PCI quality assessment method.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for obtaining a PCI total interference value based on a same frequency cell detection ratio comprises the following steps:
acquiring the MR detection proportion of the cells with the same frequency according to the MR data;
determining a main service road coverage cell according to the sweep frequency data of the road, wherein the main service road coverage cell is a cell with the strongest signal strength in the initial sampling point of the sweep frequency data;
acquiring a channel detection proportion of a same-frequency cell according to a total sampling point of the main service channel coverage cell and a sub-sampling point of a first RSRP difference value within a preset range, wherein the first RSRP difference value is the difference value of the RSRP of the main service channel coverage cell and the RSRP of a same-frequency neighboring cell of the main service channel coverage cell;
determining the maximum value of the MR detection proportion and the road detection proportion of the same-frequency cell as the detection proportion of the same-frequency cell of the same-frequency adjacent cell of the service cell detected by the service cell;
and obtaining the PCI total interference value of the service cell according to the same-frequency cell detection proportion and the PCI interference coefficient.
A device for obtaining a PCI total interference value based on a same-frequency cell detection ratio comprises:
the same-frequency cell MR detection proportion obtaining module is used for obtaining the same-frequency cell MR detection proportion according to the MR data;
the system comprises a main service road coverage cell obtaining module, a main service road coverage cell obtaining module and a main service road coverage cell obtaining module, wherein the main service road coverage cell is used for determining the main service road coverage cell according to the sweep frequency data of the road, and the main service road coverage cell is the cell with the strongest signal strength in the initial sampling point of the sweep frequency data;
an intra-frequency cell road detection proportion obtaining module, configured to obtain an intra-frequency cell road detection proportion according to a total sampling point of the main service channel coverage cell and a sub-sampling point of a first RSRP difference value within a preset range, where the first RSRP difference value is a difference value between an RSRP of the main service channel coverage cell and an RSRP of an intra-frequency neighboring cell of the main service channel coverage cell;
a common-frequency cell detection ratio obtaining module, configured to determine a maximum value of the MR detection ratio and the road detection ratio of the common-frequency cell as a common-frequency cell detection ratio of a common-frequency neighboring cell of the serving cell detected by the serving cell;
and the PCI total interference value obtaining module is used for obtaining the PCI total interference value of the service cell according to the same frequency cell detection proportion and the PCI interference coefficient.
Compared with the prior art, the method and the device for obtaining the PCI total interference value based on the same-frequency cell detection proportion have the following advantages:
(1) the invention solves the problem that the existing PCI quality evaluation is too mechanical: the invention passes PCI interference coefficient and correlation coefficient (SS)sn) Multiplying to obtain each single-pair interference value, and fully embodying which pair of cells mod3 conflict is more advantageous when the cell A cannot avoid the mod3 conflict with one cell B, C, D;
(2) the invention solves the problem that the existing PCI quality evaluation is too unilateral: interference and correlation coefficients (SS) by PCI mod3, mod6, mod30sn) Multiplication and accumulation can accurately position which PCI belongs to the optimum, and the PCI quality condition and the change degree of the PCI quality before and after the PCI is turned over can be comprehensively evaluated.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of a method for obtaining a PCI total interference value based on a co-frequency cell detection ratio according to the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of an apparatus for obtaining a PCI total interference value based on a co-channel cell detection ratio according to the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of an intra-frequency cell MR detection ratio acquisition module according to the present invention;
fig. 4 is a schematic structural diagram of a primary service channel coverage cell acquisition module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a same-frequency cell road detection proportion obtaining module according to a first embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second embodiment of a same-frequency cell channel detection ratio obtaining module according to the present invention.
Detailed Description
In order to further explain the technical means and effects of the present invention, the following description of the present invention with reference to the accompanying drawings and preferred embodiments will be made for clarity and completeness. It should be noted that the first and second terms appearing herein are only used for distinguishing the same technical features, and do not limit the order, number, and the like of the technical features.
As shown in fig. 1, a method for obtaining a PCI total interference value based on a co-channel cell detection ratio includes the steps of:
s110, acquiring the MR detection proportion of the co-frequency cells according to the MR data;
s120, determining a main service road coverage cell according to the sweep frequency data of the road, wherein the main service road coverage cell is the cell with the strongest signal intensity in the initial sampling point of the sweep frequency data;
s130, obtaining a channel detection proportion of the same-frequency cell according to a total sampling point of the main service channel coverage cell and a sub-sampling point of a first RSRP difference value in a preset range, wherein the first RSRP difference value is the difference value of the RSRP of the main service channel coverage cell and the RSRP of a same-frequency neighboring cell of the main service channel coverage cell;
s140, determining the maximum value of the MR detection proportion and the road detection proportion of the same-frequency cell as the detection proportion of the same-frequency cell of the same-frequency adjacent cell of the service cell detected by the service cell;
s150, obtaining the PCI total interference value of the service cell according to the same frequency cell detection proportion and the PCI interference coefficient.
In step S110, the same frequency cell MR detection ratio (SS)snm): the frequency of n times of detecting the same-frequency adjacent cells by a service cell (main cell) s accounts for the proportion of the frequency of all the adjacent cells detected by the service cell s, wherein SS represents signal strength, s in subscripts represents the service cell, n in the subscripts represents the same-frequency adjacent cells of the service cell, and m in the subscripts represents MR data.
SSsnmCan be calculated according to the related coefficient calculation method in the prior art, namely SSsnmThe number of measurement reports within the serving cell scell detection co-frequency neighbor celll 6 dB/total number of measurement reports detected by the serving cell. The method calculates the SS with large signal strength level differencesnmIs not accurate enough to reflect the correlation between cells.
Aiming at the defects, the invention corrects the existing correlation coefficient calculation formula. Therefore, in one embodiment, step S110 may include:
s1101, obtaining a total measurement report number detected by a serving cell according to MR data, and a first measurement report number of a second RSRP difference value in a first preset range and a second measurement report number in a second preset range, wherein the second RSRP difference value is a difference value between the RSRP of the serving cell and the RSRP of an adjacent region with the same frequency of the serving cell;
s1102, according to the expression: and obtaining the MR detection proportion of the co-frequency cells, namely (the first measurement report number/the total measurement report number) first preset constant + (the second measurement report number/the total measurement report number) second preset constant.
The first preset range and the second preset range may be determined according to actual needs, for example, the first preset range is a range less than or equal to 3dB, and the second preset range is a range less than or equal to 6dB and greater than 3 dB. The first preset constant and the second preset constant are empirical constants, wherein the first preset constant can be a value in the range of 1-1.2, preferably 1.2, and the second preset constant can be a value in the range of 0.8-1, preferably 1. The corrected MR detection proportion of the same-frequency cells is calculated in different regions, and the weight coefficient of each region is considered, so that the result is more accurate, and the correlation among the cells is more closely reflected.
In one embodiment, the modified SSsnmThe measurement report number/total measurement report number is 1.2+ within 6dB and outside 3dB of the same-frequency neighboring cell detected by the serving cell (the serving cell RSRP-the same-frequency neighboring cell RSRP is less than or equal to 3dB) of the same-frequency neighboring cell detected by the serving cell (the serving cell RSRP-the same-frequency neighboring cell RSRP is less than equal to 6dB and is more than 3 dB).
In step S120, the current LTE outdoor frequency band includes D frequency and F frequency, where the D frequency includes three frequency points D1, D2, and D3, and the F frequency includes two frequency points F1 and F2. Due to background parameter setting, if the frequency of D1 is larger than-92 dBm (decibel milliX) on the actual road, the road is basically covered by the frequency of D1.
The primary service road coverage cell may be determined according to various ways, for example, in each sampling point, the signal strength is generally arranged from large to small, and if the signal strength of a cell is arranged at the first position in consecutive N sampling points from the first initial sampling point to the next, the cell is the primary service road coverage cell, i.e. the top cell. N may be set according to needs, for example, N is set as the 13 th sampling point, and if the signal intensity of a cell from the 1 st sampling point to the 13 th sampling point is ranked in the first place, the cell is the main service road coverage cell. In addition, a secondary strong co-frequency cell within 3dBm can be defined as a secondary service road coverage cell.
When calculating the continuous sampling points, the method for determining the coverage area of the main service road is too harsh, does not consider the actual switching conditions, and loses partial points which are not the strongest but belong to the continuous sampling points. Therefore, in one embodiment, step S120 may include:
s1201, determining a cell which contains a D1 frequency point and has the maximum RSRP in an initial sampling point (namely the 1 st sampling point) of the sweep frequency data as a road coverage cell;
the road coverage cell is mainly determined by the first cell of the initial sampling point of the sweep frequency data, and if one cell in the first sampling point contains D1 frequency and the signal intensity is the strongest, the cell is the road coverage cell. Considering the uncertainty of the signal, a sampling point may drift suddenly, so that it cannot be determined whether the road coverage cell is the main service road coverage cell, and it is necessary to synthesize the subsequent sampling points to determine whether the road coverage cell is the main service road coverage cell.
S1202, respectively detecting whether difference values of RSRP of the road coverage cell and RSRP of a same-frequency adjacent cell of the road coverage cell are larger than a first preset threshold value in each sampling point of a first continuous sampling point interval, wherein the first continuous sampling point interval comprises preset continuous sampling points, and a first sampling point in the first continuous sampling point interval is a next sampling point of the initial sampling point;
each sampling point in the first continuous sampling point interval is continuous, for example, the sampling points in the first continuous sampling point interval are the 2 nd sampling point, the 3 rd sampling point, the 4 th sampling point, … … and the 10 th sampling point in sequence, and the sequence of the sampling points is determined according to the sampling time. The first preset threshold may be determined according to actual needs, for example, set to 3 dB. In each sample point in the first continuous interval of sample points, the difference needs to be greater than a first preset threshold. Taking the 10 th sampling point as an example, the RSRP of the road coverage cell needs to be stronger than that of the same-frequency neighboring cell by more than 3dB, and then the subsequent judgment is performed.
S1203, if yes, respectively detecting whether the RSRP of the road coverage cell meets preset conditions in each sampling point of a second continuous sampling point interval, wherein the second continuous sampling point interval comprises preset continuous sampling points, and a first sampling point in the second continuous sampling point interval is a next sampling point of a last sampling point in the first continuous sampling point interval;
the sampling points in the second continuous sampling interval are continuous, for example, the sampling point in the first continuous sampling interval is the 2 nd sampling point, the 3 rd sampling point, … …, the 10 th sampling point in turn, and the sampling point in the second continuous sampling interval is the 11 th sampling point, the 12 th sampling point and the 13 th sampling point in turn.
In one embodiment, the preset conditions include: (condition 1) if a cell with the strongest signal strength in one sampling point is a pilot frequency cell of the road coverage cell, the RSRP of the road coverage cell is greater than a signal strength threshold, and the signal strength threshold may be set according to an actual situation, for example, the signal strength threshold may be set to-92 dBm; or, (condition 2) if the cell with the strongest signal strength in one sampling point is the pilot frequency cell of the road coverage cell, the difference value between the RSRP of the pilot frequency cell and the RSRP of the road coverage cell is smaller than a second preset threshold, and the second preset threshold may be set according to actual needs, for example, to 6 dB; or, (condition 3) if the cell with the strongest signal strength in one sampling point is the same-frequency neighboring cell of the road coverage cell, the difference value between the RSRP of the same-frequency neighboring cell with the strongest signal strength and the RSRP of the road coverage cell is smaller than a third preset threshold, and the third preset threshold may be set according to actual needs, for example, set to 3 dB. For the 3 rd condition, it is explained by an example that, after the road coverage cell reaches the strongest 2 consecutive sampling points, the signal strength of the road coverage cell at the third sampling point becomes second stronger, but within 3dB weaker than the strongest same-frequency sampling point, it should be considered as continuous coverage.
As long as the RSRP of the road coverage cell satisfies any one of the above three conditions, even if the RSRP of the road coverage cell is not TOP in a certain sampling point, the RSRP of the road coverage cell should be calculated as continuous coverage, and thus TOP sampling points that appear continuously can be determined.
And S1204, if yes, determining the road coverage cell as a main service road coverage cell.
In step S130, the same frequency cell channel detection ratio SSsnrThe method is a road interference model established according to the sweep frequency data, and provides a powerful guarantee for the improvement of the road quality. SSsnrThe SS in the subscript represents the signal intensity, the s in the subscript represents a main service road coverage cell, the n in the subscript represents an identical-frequency adjacent cell of the main service road coverage cell, and the r in the subscript represents road frequency sweeping data.
SSsnrCan be obtained in a number of ways and will be described below with reference to two examples.
In one embodiment, step S130 may include:
s1301, obtaining a total sampling point of a main service channel coverage cell and a third sub-sampling point of a first RSRP difference value in a fifth preset range according to the frequency sweep data of the road;
s1302, obtaining a channel detection ratio of the same-frequency cell according to the ratio of the third sub-sampling point to the total sampling point.
The fifth preset range may be determined according to actual needs, for example, the fifth preset range is a range less than or equal to 6 dB. The method does not carry out calculation in intervals, and the obtained accuracy is low.
In a particular embodiment, SSsnrSampling points/A cell total sampling points within 6dB of frequency-scanning main service road covering cell A and same-frequency adjacent cell A (A cell RSRP-same-frequency adjacent cell RSRP is less than or equal to 6dB)]。
In another embodiment, step S130 includes:
s130-1, obtaining total sampling points of a main service channel coverage cell, a first sub-sampling point of a first RSRP difference value in a third preset range and a second sub-sampling point of the first RSRP difference value in a fourth preset range according to sweep frequency data of a road;
s130-2, according to the expression: and obtaining the same-frequency cell road detection proportion (the first sub-sampling point/the total sampling point) and a third preset constant + (the second sub-sampling point/the total sampling point) and a fourth preset constant.
The third preset range and the fourth preset range may be determined according to actual needs, for example, the third preset range is a range less than or equal to 3dB, and the second preset range is a range less than or equal to 6dB and greater than 3 dB. The third preset constant and the fourth preset constant are empirical constants, wherein the third preset constant may be a value in the range of 1-1.2, preferably 1.2, and the fourth preset constant may be a value in the range of 0.8-1, preferably 1. SSsnrThe calculation is carried out in different regions, and the weight coefficient of each region is considered, so that the result is more accurate, and the correlation between the road cells is more closely reflected.
In a particular embodiment, SSsnrSampling points/A cell total sampling points within 3dB of frequency-scanning main service road covering cell A and same-frequency adjacent cell A (A cell RSRP-same-frequency adjacent cell RSRP is less than or equal to 3dB)]1.2+ sweep frequency A cell and sampling points in 6dB and out of 3dB (A cell RSRP-same frequency adjacent cell RSRP is less than or equal to 6dB and more than 3dB) of the same frequency adjacent cell/A cell total sampling point.
In step S140, the same-frequency cell detection ratio SSsnBased on the MR detection proportion (SS) of the same-frequency cellssnm) And same frequency cell road detection ratio (SS)snr) The calculation formula is as follows:
same frequency cell detection ratio (SS)sn)＝MAX((SSsnm),(SSsnr))
In step S150, in an embodiment, the PCI total interference value of the serving cell may be obtained according to the following expression:
of these, sum (M3R, M6R, M30R)mPCI interference coefficients of a serving cell and a same-frequency adjacent cell m of the serving cell; (SS)sn)mIs the same frequency cell detection ratio, SS, of the serving cell and the same frequency neighbor cell m of the serving cellsnS in the subscript represents a service cell, and n represents a same-frequency adjacent cell; M3R is the interference coefficient of PCI mod3, M6R is the interference coefficient of PCI mod6, and M30R is the interference coefficient of PCI mod30, which are specifically defined as follows:
cell mod3 interference coefficient (M3R): when mod (PCI1,3) is mod (PCI2,3), the value is 1;
cell mod6 interference coefficient (M6R): when mod (PCI1,6) is mod (PCI2,6), the value is 0.8;
cell mod30 interference coefficient (M30R): when mod (PCI1,30) is mod (PCI2,30), the value is 0.1.
And the values of other cells are 0.
It should be noted that the above is only a specific example of the values of M3R, M6R, and M30R, the values of which are not limited by the present invention, and the user may set them to other values as needed.
In order to better understand the method for obtaining the PCI total interference value according to the present invention, a specific embodiment is described below.
Suppose that the cell a has N same-frequency neighboring cells, which are respectively a cell B, a cell C, and a cell D … … (the total number is N).
The interference value of the cell A → the cell B is equal to the detection ratio of the same frequency cell of the cell B detected by the cell A, and is multiplied by the interference coefficients of the cell A and the cell B. If there are PCI mod3 collision, PCI mod6 collision, and PCI mod30 collision in cell a and cell B at the same time, the interference coefficient is 1+0.8+0.1, and other cases are similar and will not be described herein.
The interference value of the cell A → the cell C is equal to the detection ratio of the same frequency cell of the cell C detected by the cell A, and is multiplied by the interference coefficients of the cell A and the cell C. If there are both PCI mod3 collision and PCI mod6 collision in cell a and cell C, the interference coefficient is 1+0.8, and other cases are similar and will not be described herein.
……
By analogy, the interference values of the cell a and all the cells with the same frequency can be obtained, and then the obtained interference values are accumulated to obtain the PCI total interference value of the cell a.
Based on the same inventive concept, the invention also provides a device for obtaining the PCI total interference value based on the same frequency cell detection proportion, and the specific implementation mode of the device is described in detail below by combining the attached drawings.
As shown in fig. 2, an apparatus for obtaining a PCI total interference value based on a co-channel cell detection ratio includes:
a common-frequency cell MR detection ratio obtaining module 110, configured to obtain a common-frequency cell MR detection ratio according to MR data;
a main service road coverage cell obtaining module 120, configured to determine a main service road coverage cell according to frequency sweep data of a road, where the main service road coverage cell is a cell with a strongest signal strength in an initial sampling point of the frequency sweep data;
an intra-frequency cell road detection ratio obtaining module 130, configured to obtain an intra-frequency cell road detection ratio according to a total sampling point of the main service channel coverage cell and a sub-sampling point of a first RSRP difference value within a preset range, where the first RSRP difference value is a difference value between an RSRP of the main service channel coverage cell and an RSRP of an intra-frequency neighboring cell of the main service channel coverage cell;
a same-frequency cell detection ratio obtaining module 140, configured to determine a maximum value of the MR detection ratio and the road detection ratio of the same-frequency cell as a same-frequency cell detection ratio of a same-frequency neighboring cell of the serving cell detected by the serving cell;
a PCI total interference value obtaining module 150, configured to obtain a PCI total interference value of the serving cell according to the co-frequency cell detection ratio and the PCI interference coefficient.
The same-frequency cell MR detection ratio obtaining module 110 can obtain SS according to the existing correlation coefficient calculation method in the prior artsnmI.e. SSsnmThe number of measurement reports within the serving cell scell detection co-frequency neighbor celll 6 dB/total number of measurement reports detected by the serving cell. However, the method calculates the SS with large signal strength level differencesnmIs not accurate enough to reflect the correlation between cells.
Aiming at the defects, the invention corrects the existing correlation coefficient calculation formula. Therefore, in an embodiment, as shown in fig. 3, the intra-frequency cell MR detection ratio obtaining module 110 may include:
a measurement report number obtaining unit 1101, configured to obtain, according to MR data, a total measurement report number detected by a serving cell, and a first measurement report number of a second RSRP difference value within a first preset range and a second measurement report number within a second preset range, where the second RSRP difference value is a difference value between an RSRP of the serving cell and an RSRP of an intra-frequency neighboring cell of the serving cell;
an intra-frequency cell MR detection ratio obtaining unit 1102, configured to: and obtaining the MR detection proportion of the co-frequency cells, namely (the first measurement report number/the total measurement report number) first preset constant + (the second measurement report number/the total measurement report number) second preset constant.
The corrected MR detection proportion of the same-frequency cells is calculated in different regions, and the weight coefficient of each region is considered, so that the result is more accurate, and the correlation among the cells is more closely reflected.
The main service road coverage cell obtaining module 120 may determine the main service road coverage cell according to a variety of ways, for example, in each sampling point, the signal strength is generally arranged from large to small, and if the signal strength of a cell is arranged in the first position from the first initial sampling point to the next consecutive N sampling points, the cell is the main service road coverage cell, i.e., the top cell. N may be set as desired.
When calculating the continuous sampling points, the method for determining the coverage area of the main service road is too harsh, does not consider the actual switching conditions, and loses partial points which are not the strongest but belong to the continuous sampling points. Therefore, in one embodiment, as shown in fig. 4, the primary serving road coverage cell obtaining module 120 may include:
a road coverage cell determining unit 1201, configured to determine a cell, in which a start sampling point of the sweep frequency data includes a D1 frequency point and RSRP is the largest, as a road coverage cell;
a difference detection unit 1202, configured to detect, in each sampling point of a first continuous sampling point interval, whether a difference between an RSRP of the road coverage cell and an RSRP of an adjacent cell of the road coverage cell is greater than a first preset threshold, where the first continuous sampling interval includes a preset number of continuous sampling points, and a first sampling point in the first continuous sampling point interval is a next sampling point of the initial sampling point;
an RSRP detecting unit 1203, configured to detect whether RSRP of the road coverage cell meets a preset condition in each sampling point of a second continuous sampling point interval when the difference is greater than a first preset threshold, where the second continuous sampling point interval includes preset continuous sampling points, and a first sampling point in the second continuous sampling point interval is a next sampling point of a last sampling point in the first continuous sampling point interval;
a main service road coverage cell determining unit 1204, configured to determine, when the RSRPs all satisfy a preset condition, the road coverage cell as a main service road coverage cell.
In one embodiment, the preset conditions include: (condition 1) if a cell with the strongest signal strength in one sampling point is a pilot frequency cell of the road coverage cell, the RSRP of the road coverage cell is greater than a signal strength threshold, and the signal strength threshold may be set according to an actual situation, for example, the signal strength threshold may be set to-92 dBm; or, (condition 2) if the cell with the strongest signal strength in one sampling point is the pilot frequency cell of the road coverage cell, the difference value between the RSRP of the pilot frequency cell and the RSRP of the road coverage cell is smaller than a second preset threshold, and the second preset threshold may be set according to actual needs, for example, to 6 dB; or, (condition 3) if the cell with the strongest signal strength in one sampling point is the same-frequency neighboring cell of the road coverage cell, the difference value between the RSRP of the same-frequency neighboring cell with the strongest signal strength and the RSRP of the road coverage cell is smaller than a third preset threshold, and the third preset threshold may be set according to actual needs, for example, set to 3 dB.
As long as the RSRP of the road coverage cell satisfies any one of the above three conditions, even if the RSRP of the road coverage cell is not TOP in a certain sampling point, the RSRP of the road coverage cell should be calculated as continuous coverage, and thus TOP sampling points that appear continuously can be determined.
The same-frequency cell channel detection ratio obtaining module 130 can obtain the SS according to various wayssnrFor example, in an embodiment, as shown in fig. 5, the intra-frequency cell channel detection ratio obtaining module 130 may include:
the second sampling point obtaining unit 1301 is configured to obtain a total sampling point of a main service channel coverage cell and a third sub-sampling point of the first RSRP difference value within a fifth preset range according to the frequency sweep data of the road;
a second same-frequency cell road detection ratio obtaining unit 1302, configured to obtain a same-frequency cell road detection ratio according to a ratio of the third sub-sampling point to the total sampling point. The method does not carry out calculation in intervals, and the accuracy obtained by the method is low.
In another embodiment, as shown in fig. 6, the intra-frequency cell channel detection ratio obtaining module 130 may include:
the first sampling point obtaining unit 130-1 is configured to obtain a total sampling point of a main service channel coverage cell, a first sub-sampling point of a first RSRP difference value within a third preset range, and a second sub-sampling point of the first RSRP difference value within a fourth preset range according to sweep frequency data of a road;
a first on-frequency cell road detection ratio obtaining unit 130-2, configured to: and obtaining the same-frequency cell road detection proportion (the first sub-sampling point/the total sampling point) and a third preset constant + (the second sub-sampling point/the total sampling point) and a fourth preset constant.
In the method SSsnrThe calculation is carried out in different regions, and the weight coefficient of each region is considered, so that the result is more accurate, and the correlation between the road cells is more closely reflected.
Same frequency cell detection ratio SSsnBased on the MR detection proportion (SS) of the same-frequency cellssnm) And same frequency cell road detection ratio (SS)snr) The same-frequency cell detection ratio obtaining module 140 obtains the same-frequency cell detection ratio SS according to the following calculation formulasn：
Same frequency cell detection ratio (SS)sn)＝MAX((SSsnm),(SSsnr))
In one embodiment, the PCI total interference value obtaining module 150 may obtain the PCI total interference value of the serving cell according to the following expression:
of these, sum (M3R, M6R, M30R)mIs the PCI interference coefficient of the serving cell and the co-frequency adjacent cell M of the serving cell, M3R isThe interference coefficient of PCI mod3, M6R for PCI mod6, M30R for PCI mod30, (SS mod 30)sn)mIs the same frequency cell detection ratio, SS, of the serving cell and the same frequency neighbor cell m of the serving cellsnS in the subscript denotes a serving cell and n denotes an intra-frequency neighbor cell.
Compared with the prior art, the method and the device for obtaining the PCI total interference value based on the same-frequency cell detection proportion have the following advantages:
(1) the invention solves the problem that the existing PCI quality evaluation is too mechanical: the invention passes PCI interference coefficient and correlation coefficient (SS)sn) Multiplying to obtain each single-pair interference value, and fully embodying which pair of cells mod3 conflict is more advantageous when the cell A cannot avoid the mod3 conflict with one cell B, C, D;
(2) the invention solves the problem that the existing PCI quality evaluation is too unilateral: interference and correlation coefficients (SS) by PCI mod3, mod6, mod30sn) Multiplication and accumulation can accurately position which PCI belongs to the optimum, and the PCI quality condition and the change degree of the PCI quality before and after the PCI is turned over can be comprehensively evaluated.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A method for obtaining a PCI total interference value based on a same frequency cell detection ratio is characterized by comprising the following steps:
acquiring the MR detection proportion of the cells with the same frequency according to the MR data;
determining a main service road coverage cell according to the sweep frequency data of the road, wherein the main service road coverage cell is a cell with the strongest signal strength in the initial sampling point of the sweep frequency data;
acquiring a same-frequency cell road detection proportion according to the total sampling point of the main service road coverage cell and the sub-sampling point of a first RSRP difference value in a preset range, wherein the first RSRP difference value is the difference value of the RSRP of the main service road coverage cell and the RSRP of a same-frequency adjacent cell of the main service road coverage cell;
determining the maximum value of the MR detection proportion and the road detection proportion of the same-frequency cell as the detection proportion of the same-frequency cell of the same-frequency adjacent cell of the service cell detected by the service cell;
obtaining a PCI total interference value of the service cell according to the same-frequency cell detection proportion and the PCI interference coefficient;
wherein, the step of obtaining the MR detection proportion of the co-frequency cells according to the MR data comprises the following steps:
obtaining the total measurement report number detected by a serving cell according to MR data, and a first measurement report number of a second RSRP difference value in a first preset range and a second measurement report number in a second preset range, wherein the second RSRP difference value is the difference value of the RSRP of the serving cell and the RSRP of an adjacent region with the same frequency of the serving cell;
according to the expression: obtaining an intra-frequency cell MR detection ratio (the first measurement report number/the total measurement report number) × a first preset constant + (the second measurement report number/the total measurement report number) × a second preset constant;
MR is a measurement report.
2. The method according to claim 1, wherein the step of determining the coverage area of the main service road according to the sweep frequency data of the road comprises:
determining a cell with the maximum RSRP and containing a D1 frequency point in an initial sampling point of the sweep frequency data as a road coverage cell;
respectively detecting whether difference values of RSRP of the road coverage cell and RSRP of an adjacent cell with the same frequency of the road coverage cell are larger than a first preset threshold value or not in each sampling point of a first continuous sampling point interval, wherein the first continuous sampling interval comprises preset continuous sampling points, and a first sampling point in the first continuous sampling point interval is a next sampling point of the initial sampling point;
if yes, respectively detecting whether the RSRP of the road coverage cell meets preset conditions in each sampling point of a second continuous sampling point interval, wherein the second continuous sampling point interval comprises preset continuous sampling points, and a first sampling point in the second continuous sampling point interval is a next sampling point of a last sampling point in the first continuous sampling point interval; the preset conditions include: if the cell with the strongest signal strength in one sampling point is a pilot frequency cell of the road coverage cell, the RSRP of the road coverage cell is greater than a signal strength threshold value; or if the cell with the strongest signal strength in one sampling point is a pilot frequency cell of the road coverage cell, the difference value between the RSRP of the pilot frequency cell and the RSRP of the road coverage cell is smaller than a second preset threshold value; or if the cell with the strongest signal strength in one sampling point is the same-frequency neighboring cell of the road coverage cell, the difference value of the RSRP of the same-frequency neighboring cell with the strongest signal strength and the RSRP of the road coverage cell is smaller than a third preset threshold value;
and if so, determining the road coverage cell as a main service road coverage cell.
3. The method of claim 1 for obtaining the PCI total interference value based on the intra-frequency cell detection ratio,
the step of obtaining the road detection proportion of the same-frequency cell according to the total sampling point of the main service road coverage cell and the sub-sampling points of the first RSRP difference value within the preset range comprises the following steps:
acquiring total sampling points of a coverage cell of a main service road, a first sub-sampling point of a first RSRP difference value in a third preset range and a second sub-sampling point of a first RSRP difference value in a fourth preset range according to sweep frequency data of the road;
according to the expression: obtaining a channel detection ratio of the same-frequency cell, wherein the channel detection ratio of the same-frequency cell is (the first sub-sampling point/the total sampling point) × a third preset constant + (the second sub-sampling point/the total sampling point) × a fourth preset constant;
or,
the step of obtaining the road detection proportion of the same-frequency cell according to the total sampling point of the main service road coverage cell and the sub-sampling points of the first RSRP difference value within the preset range comprises the following steps:
acquiring a total sampling point of a main service road coverage cell and a third sub-sampling point of a first RSRP difference value in a fifth preset range according to the sweep frequency data of the road;
and obtaining the road detection proportion of the same-frequency cell according to the ratio of the third sub-sampling point to the total sampling point.
4. The method according to any one of claims 1 to 3, wherein the PCI total interference value of the serving cell is obtained according to the following expression:
of these, sum (M3R, M6R, M30R)mIs the PCI interference coefficient of a serving cell and an intra-frequency adjacent cell M of the serving cell, M3R is the interference coefficient of PCI mod3, M6R is the interference coefficient of PCI mod6, M30R is the interference coefficient of PCI mod30, (SS)sn)mThe same-frequency cell detection proportion of the service cell and the same-frequency adjacent cell m of the service cell.
5. A device for obtaining a PCI total interference value based on a same-frequency cell detection ratio is characterized by comprising the following steps:
the same-frequency cell MR detection proportion obtaining module is used for obtaining the same-frequency cell MR detection proportion according to the MR data;
the system comprises a main service road coverage cell obtaining module, a main service road coverage cell obtaining module and a main service road coverage cell obtaining module, wherein the main service road coverage cell is used for determining the main service road coverage cell according to the sweep frequency data of the road, and the main service road coverage cell is the cell with the strongest signal strength in the initial sampling point of the sweep frequency data;
the system comprises a same-frequency cell road detection proportion obtaining module, a main service road coverage cell acquiring module and a main service road coverage cell acquiring module, wherein the same-frequency cell road detection proportion obtaining module is used for obtaining a same-frequency cell road detection proportion according to a total sampling point of the main service road coverage cell and a sub-sampling point of a first RSRP difference value in a preset range, and the first RSRP difference value is a difference value of the RSRP of the main service road coverage cell and the RSRP of a same-frequency adjacent cell of the main service road coverage cell;
a common-frequency cell detection ratio obtaining module, configured to determine a maximum value of the MR detection ratio and the road detection ratio of the common-frequency cell as a common-frequency cell detection ratio of a common-frequency neighboring cell of the serving cell detected by the serving cell;
a PCI total interference value obtaining module, configured to obtain a PCI total interference value of the serving cell according to the co-frequency cell detection ratio and the PCI interference coefficient;
wherein, the same-frequency cell MR detection proportion obtaining module comprises:
a measurement report number obtaining unit, configured to obtain, according to MR data, a total measurement report number detected by a serving cell, and a first measurement report number of a second RSRP difference value within a first preset range and a second measurement report number within a second preset range, where the second RSRP difference value is a difference value between an RSRP of the serving cell and an RSRP of an intra-frequency neighboring cell of the serving cell;
the same-frequency cell MR detection proportion obtaining unit is used for obtaining the proportion of the MR detection in the same-frequency cell according to the expression: obtaining an intra-frequency cell MR detection ratio (the first measurement report number/the total measurement report number) × a first preset constant + (the second measurement report number/the total measurement report number) × a second preset constant;
MR is a measurement report.
6. The apparatus according to claim 5, wherein the main service road coverage cell obtaining module comprises:
the road coverage cell determining unit is used for determining a cell which contains a D1 frequency point and has the maximum RSRP in the initial sampling point of the sweep frequency data as a road coverage cell;
the difference detection unit is used for respectively detecting whether the difference value of the RSRP of the road coverage cell and the RSRP of the same-frequency adjacent cell of the road coverage cell is larger than a first preset threshold value in each sampling point of a first continuous sampling point interval, wherein the first continuous sampling point interval comprises preset continuous sampling points, and the first sampling point in the first continuous sampling point interval is the next sampling point of the initial sampling point;
the RSRP detection unit is used for respectively detecting whether the RSRP of the road coverage cell meets preset conditions in each sampling point of a second continuous sampling point interval when the difference values are all larger than a first preset threshold value, wherein the second continuous sampling point interval comprises preset continuous sampling points, and a first sampling point in the second continuous sampling point interval is a next sampling point of a last sampling point in the first continuous sampling point interval; the preset conditions include: if the cell with the strongest signal strength in one sampling point is a pilot frequency cell of the road coverage cell, the RSRP of the road coverage cell is greater than a signal strength threshold value; or if the cell with the strongest signal strength in one sampling point is a pilot frequency cell of the road coverage cell, the difference value between the RSRP of the pilot frequency cell and the RSRP of the road coverage cell is smaller than a second preset threshold value; or if the cell with the strongest signal strength in one sampling point is the same-frequency neighboring cell of the road coverage cell, the difference value of the RSRP of the same-frequency neighboring cell with the strongest signal strength and the RSRP of the road coverage cell is smaller than a third preset threshold value;
and the main service road coverage cell determining unit is used for determining the road coverage cell as the main service road coverage cell when the RSRP meets the preset condition.
7. The apparatus for obtaining the PCI total interference value based on the intra-frequency cell detection ratio according to claim 5,
the same-frequency cell road detection proportion obtaining module comprises:
the first sampling point obtaining unit is used for obtaining total sampling points of a coverage cell of a main service road, a first sub-sampling point of a first RSRP difference value in a third preset range and a second sub-sampling point of a first RSRP difference value in a fourth preset range according to sweep frequency data of the road;
a first same-frequency cell road detection proportion obtaining unit, configured to: obtaining a channel detection ratio of the same-frequency cell, wherein the channel detection ratio of the same-frequency cell is (the first sub-sampling point/the total sampling point) × a third preset constant + (the second sub-sampling point/the total sampling point) × a fourth preset constant;
or,
the same-frequency cell road detection proportion obtaining module comprises:
the second sampling point obtaining unit is used for obtaining a total sampling point of a main service road coverage cell and a third sub-sampling point of the first RSRP difference value within a fifth preset range according to the sweep frequency data of the road;
and the second same-frequency cell road detection proportion obtaining unit is used for obtaining the same-frequency cell road detection proportion according to the ratio of the third sub-sampling point to the total sampling point.
8. The apparatus according to any one of claims 5 to 7, wherein the PCI total interference value obtaining module obtains the PCI total interference value of the serving cell according to the following expression:
of these, sum (M3R, M6R, M30R)mIs the PCI interference coefficient of a serving cell and an intra-frequency adjacent cell M of the serving cell, M3R is the interference coefficient of PCI mod3, M6R is the interference coefficient of PCI mod6, M30R is the interference coefficient of PCI mod30, (SS)sn)mThe same-frequency cell detection proportion of the service cell and the same-frequency adjacent cell m of the service cell.
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| CN110299979B (en) * | 2018-03-23 | 2022-04-08 | ***通信有限公司研究院 | Same-frequency measurement method, network equipment, terminal and computer storage medium |
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