CN101296477A - A method and device for network topology planning - Google Patents

Abstract

The invention discloses a method for network topology planning. The method is as follows: a network topology planning device obtains a relationship matrix of each network topology unit in a designated area; Designate all network topology planning methods for dividing the area; then, according to at least one preset network load parameter, filter all network topology planning methods to determine at least one target network topology planning method; finally, execute the target network In the topology planning mode, network topology planning is performed on the designated area. In this way, the tediousness caused by manual operation or semi-manual operation is eliminated, and work efficiency is greatly improved; at the same time, since the determination of the target network topology planning method no longer depends on the experience level of the planner, Instead, it is screened based on accurate parameter settings, thus greatly improving the quality of planning solutions. The invention also discloses a network topology planning device.

Description

A method and device for network topology planning

technical field

The invention relates to the communication field, in particular to a method and device for network topology planning.

Background technique

With the continuous development of communication technology, the network architecture of the global mobile communication system is becoming larger and larger, which requires a reasonable network topology planning for the mobile communication system in order to improve the utilization of network resources and realize the rational allocation of network resources.

In order to better realize the management of the mobile communication system, it is necessary to establish a corresponding mobility user model for a large number of users in the mobile communication system. The so-called user mobility model includes various behaviors of the user, such as: mobile behavior, call behavior and short message behavior, etc., the user mobility model can truly reflect the impact of a large number of users on the mobile communication system. According to the established user mobility model, operations such as location and wireless resource management, customer behavior analysis, network resource reorganization, and resource reservation can be performed on the mobile communication system, so as to realize the reasonable planning of the mobile communication system and maximize the improvement of various mobile communication systems. Utilization of network resources.

However, in the prior art, the network topology planning technology usually adopts a manual planning method or a semi-manual planning method, and the planning goal is mainly aimed at optimizing network element boundaries and balancing a certain network load. The manual or semi-manual planning method mainly relies on the manual calculation and analysis of planners. The tool platform used is MapInfo or similar tools. Through the continuous attempts of planners, the goal of planning network element boundaries and balancing network loads is achieved.

For example, to re-plan the control areas of each BSC within the jurisdiction of an MSC, so that the number of carrier frequencies (TRX) in each control area after planning is as even as possible, then the operation steps of manual planning are as follows:

1) Planners draw the latitude and longitude of each base station within the jurisdiction of MSC in MapInfo:

2) Planners outline a polygon as the coverage area of a BSC;

3) The planner calculates the total number of TRXs of the base stations contained in the polygon through the SQL query of MapInfo;

4) The planner judges whether the total number of TRXs of the base stations contained in the polygon meets the average condition, and if not (such as too many or too few TRXs), make corresponding adjustments;

5) The planner repeats steps 2), 3), and 4) until the control area planning of each BSC within the jurisdiction of the MSC is completed.

The so-called semi-manual method is to use some auxiliary controls to realize the outline of the polygon and realize the real-time calculation of the total number of TRX in steps 2) and 3).

Figure 1 shows the network topology plan made by hand or semi-manually.

Obviously, the existing network topology technology is almost completely dependent on manual operation, and the quality of the planning scheme is directly related to the technical level and planning experience of the planners, so that the quality of the planning scheme cannot be guaranteed. In the process, in order to find the balance of various network load parameters, planners can only keep trying manually, and whether each network load parameter reaches the preset balance target depends entirely on the judgment of the planners, and the operation steps are too cumbersome, which greatly The work efficiency of network topology planning is reduced, and at the same time, due to the limited number of attempts, the final planning scheme may not be the best scheme.

Contents of the invention

Embodiments of the present invention provide a method and device for network topology planning, which are used to improve work efficiency and improve the quality of planning solutions when planning a network topology structure of a mobile communication system.

A method for network topology planning, comprising the steps of:

The network topology planning device obtains the relationship matrix of each network topology unit in the specified area;

The network topology planning device obtains all network topology planning methods for dividing the specified area according to the preset number of divisions according to the relationship matrix;

The network topology planning device screens all the network topology planning methods according to at least one preset network load parameter, and determines at least one target network topology planning method;

Executing the target network topology planning method to perform network topology planning for the designated area.

A network topology planning device, comprising:

a storage unit for storing preset conditions, the preset conditions including at least two network load parameters;

The first processing unit is configured to obtain a relationship matrix of each network topology unit in a specified area;

The second processing unit is configured to obtain all network topology planning methods for dividing the specified area according to the preset number of divisions according to the relationship matrix;

A screening unit, configured to screen all the network topology planning methods according to the preset condition of at least one preset network load parameter, and determine at least one target network topology planning method; the preset condition includes at least two network loads parameter;

The execution unit is configured to execute the target network topology planning manner to plan the network topology of the mobile communication system.

In the embodiment of the present invention, the network topology planning device obtains the relationship matrix of each network topology unit in the designated area, and then obtains all network topology planning methods for dividing the designated area according to the preset number of divisions according to the relationship matrix, and All the network topology planning modes are screened according to at least one network load parameter to determine at least one target network topology planning mode. In this way, when planning the network topology of the mobile communication network, the tediousness caused by manual operation or semi-manual operation is eliminated, and the work efficiency is greatly improved; at the same time, due to the target network topology planning method The determination no longer depends on the experience level of planners, but is screened according to accurate parameter settings, thus greatly improving the quality of planning solutions.

Description of drawings

Fig. 1 is the network topology diagram planned by manual/semi-manual mode in the prior art of the present invention;

FIG. 2 is a functional structural diagram of a network topology planning device in an embodiment of the present invention;

FIG. 3A is a flowchart of network topology planning performed by the network topology planning device on the mobile communication system according to the specified number of divisions in the embodiment of the present invention;

3B and 3C are schematic diagrams of the mobility model matrix in the embodiment of the present invention;

3D-3G are schematic diagrams of various segmentation methods in the embodiment of the present invention;

FIG. 4A and FIG. 4B are schematic diagrams showing the state comparison of the designated area before and after segmentation in the embodiment of the present invention;

Figure 5 and Figure 6 are comparison diagrams of the effects of the prior art means in the embodiment of the present invention and the technical means of the embodiment of the present invention.

Detailed ways

In order to improve the work efficiency of network topology planning in the mobile communication system and improve the quality of the planning scheme, in the embodiment of the present invention, the network topology planning device first obtains the relationship matrix of each network topology unit in the designated area; All the network topology planning methods for dividing the specified area by the set number of divisions; then, filter all the network topology planning methods according to at least one preset network preset condition, and determine at least one target network topology planning method, Finally, execute the target network topology planning method to plan the network topology of the mobile communication system.

In the above method, according to the actual application environment, the network topology unit may be any one of base station, BSC, MSC, or LAC. There are also various relationship matrices of each network topology unit, for example: handover matrix, interference matrix, mobility model matrix, and so on. Wherein, the switching matrix can be obtained from the daily network statistical data, the interference matrix can be obtained according to the measurement report reported by each user terminal, and the mobility model matrix can be obtained through the mobility model algorithm, which will not be repeated here.

The preferred implementation manner of the present invention will be described in detail below by taking the base station as an example of the network topology unit and referring to the accompanying drawings.

2, in this embodiment, the network topology planning device includes a storage unit 200, a first processing unit 201, a second processing unit 202, a screening unit 203 and an execution unit 204, wherein:

The storage unit 200 is configured to store preset constraints, where the preset constraints include at least two network load parameters;

The first processing unit 201 is configured to obtain a relationship matrix of each base station in a designated area;

The second processing unit 202 is configured to obtain all network topology planning methods for dividing the specified area according to the preset number of divisions according to the above relationship matrix;

A screening unit 203, configured to filter all obtained network topology planning methods according to at least one preset network load parameter, and determine at least one target network topology planning method;

The execution unit 204 is configured to execute the target network topology planning manner to plan the network topology of the mobile communication system.

Certainly, as shown in FIG. 2 , if the manager wants to directly observe the generated network topology planning diagram through the display, a user interface unit 205 may also be provided in the network topology planning device for outputting the generated network topology planning diagram.

Based on the above-mentioned network topology planning device, as shown in FIG. 3A, in this embodiment, the network topology planning device performs network topology planning on the mobile communication system according to the specified number of divisions as follows:

Step 300: The network topology planning device obtains the relationship matrix of each base station in the specified area.

In practical applications, the above designated area may be the entire mobile communication system, or part of the mobile communication system. In this embodiment, the designated area is taken as an MSC jurisdiction area as an example for introduction.

On the other hand, there are various relationship matrices of each network topology unit in a designated area, such as handover matrix, interference matrix, mobility model matrix, etc.; in this embodiment, the mobility model matrix is used as an example for introduction. Referring to Fig. 3B, the mobility model matrix can reflect the degree of closeness between base stations in a designated area, for example, the degree of association between base station A2 and base station B1 (i.e. mobile user penetration rate) is 2 (unit: person-times); or, as shown in Figure 3C, the mobility model matrix can also be drawn in the manner shown in Figure 3C, wherein each endpoint represents a base station, and the value in the endpoint represents the weight of the base station, and the weight value can be but Not limited to network load parameters (KPIs) such as traffic volume, paging volume, number of circuits, number of users, number of carriers, etc., the connection between endpoints represents the degree of correlation between two base stations in the mobility model matrix.

Step 310: The network topology planning device determines the total number of network topology planning methods (hereinafter referred to as division methods) that can be used when dividing the specified area according to the preset number of divisions.

In this embodiment, assuming that the specified number of divisions is 2, that is, the designated area is divided into two areas, then there are a total of available division methods: ${\mathrm{<figure-callout\; id="6"\; label="C"\; filenames="A20081011548900191.png,A20081011548900201.png"\; state="\{\{state\}\}">C</figure-callout>}}_6^1+{\mathrm{<figure-callout\; id="6"\; label="C"\; filenames="A20081011548900191.png,A20081011548900201.png"\; state="\{\{state\}\}">C</figure-callout>}}_6^2+{\mathrm{<figure-callout\; id="6"\; label="C"\; filenames="A20081011548900191.png,A20081011548900201.png"\; state="\{\{state\}\}">C</figure-callout>}}_6^3=156$ kind.

Step 320: The network topology planning device deletes the divisions of discontinuous geographic locations.

For example, the division method shown in 3D is not adopted, where base station A1 and base station B2 belong to the same division area (as shown in the blank part in Figure 3D), while base station B1, base station B3, base station B4 and base station A2 belong to The same segmented region (shown by the oblique line in Figure 3D).

In practical applications, whether each divided area is geographically continuous may be determined according to whether the coverage area (for example, Thiessen polygon) of each base station has a common boundary.

Step 330: The device for network topology planning deletes the unbalanced segmentation mode of the target balance parameter.

In practical applications, a certain KPI value that needs to be controlled is set as the target balance parameter, and the obtained segmentation methods are first screened according to the target balance parameter; and in this embodiment, the target balance parameter will be the load Frequency (TRX) is used as an example for introduction. Referring to Table 1, it is assumed that the number of TRXs of each base station in Figure 3C is as follows:

Table 1

base station A1 A2 B1 B2 B3 B4 Number of TRX 10 10 6 9 4 10

Therefore, the network topology planning device needs to determine the total number of TRXs in each segmented area obtained after adopting each splitting method. For example, the splitting method shown in FIG. 3E is not adopted, wherein base stations A2 and B4 belong to the same splitting area (eg As shown in the blank part in FIG. 3E ), and the base stations A1 , B1 , B2 and B3 belong to the same segmented area (as shown in the hatched part in FIG. 3E ). Referring to Table 1, if the division method shown in Figure 3E is adopted, the total TRXs of the two divided regions after division are 29 and 20 respectively. Obviously, the total number of TRXs is unbalanced (that is, exceeds the set threshold), This will easily lead to uneven network load parameters such as traffic volume among the divided areas, and in severe cases, it will cause network security problems. Therefore, it is necessary to delete the division method in which the total number of TRXs is unbalanced. In this embodiment, whether the total number of TRXs is balanced can be judged according to the acceptability of the total number of TRXs after grouping set in advance. The so-called balance of the total number of TRXs means that the total number of TRXs in each divided area does not exceed the set threshold.

Step 340: The network topology planning device deletes the division modes that do not meet the preset constraint conditions.

In practical applications, after screening the obtained segmentation methods based on the target balance parameters, if the quality of the planning scheme needs to be further improved, all the segmentation methods obtained after the above screening can be re-screened according to the preset constraints . The aforementioned preset constraints include at least one KPI value different from the target equalization parameter, and the KPI value may include but not limited to traffic volume, paging volume, number of circuits, number of users, number of carrier frequencies, and the like. In this embodiment, the preset constraint condition includes two KPI values of traffic volume and paging number as an example for introduction. Referring to shown in table 2, in the present embodiment, the traffic volume and the number of paging within the jurisdiction of each base station shown in Fig. 3C are as follows:

Table 2

base station A1 A2 B1 B2 B3 B4 Traffic 39 41 25 35 17 42 Number of paging 110 109 72 96 39 102

Based on the contents of the table items recorded in Table 2, it can be obtained that the average value of traffic within the jurisdiction of each base station is 99.5Erl, and the average value of paging numbers is 264: Correspondingly, the constraints set in this embodiment are, after division The total amount of traffic in each segmented area should meet 80% to 120% of the average value of traffic, and the number of pages in each segmented area should meet 80% to 120% of the average value of paged numbers; then, the network topology planning device Then, corresponding trade-offs can be made for the obtained segmentation methods according to the above constraint conditions.

Of course, in practical applications, the factors considered when formulating constraints can also be added/deleted/modified according to the actual situation. At the same time, the formulated constraints should also be appropriately changed as the application environment changes. The above content is just an example. I won't repeat them here.

Step 350: The network topology planning device determines the target division method (ie, the target network topology planning method) for dividing the specified area.

In this embodiment, if the network topology planning device determines the target division methods after step 300-step 350, there are two or more than two types, then the network topology planning device can perform network topology planning for the designated area according to any one of them, or Obtain all network topology planning results for managers to choose. For example, as shown in FIG. 3F, in this embodiment, the finally selected division method is: base station A1, base station B3 and base station B4 belong to the same division area (as shown in the oblique line in FIG. 3F), while base station A2, base station B1 and base station B2 belong to the same segmented area (as shown in the blank part in FIG. 3F ).

In the above embodiment, when determining the target segmentation method, the network topology planning device may also set the threshold value of the degree of association between cells, so as to re-screen each segmentation method obtained after screening in step 350, for example: in this embodiment , the minimum value of the number of cell associations obtained by the network topology planning device is 7, then the division method shown in Figure 3F is not adopted, wherein base station A1, base station B1 and base station B2 belong to the same division area (as shown in Figure 3G As shown in the blank part), base station A2, base station B3 and base station B4 belong to the same segmented area (as shown by the oblique line in Figure 3F), and the number of cell associations between the two segmented areas reaches 17, far exceeding the minimum value of 7 , and therefore, should be removed.

Of course, the two screening methods of "deleting the segmentation method with discontinuous geographic location" and "deleting the segmentation method with the degree of correlation between the segmented regions exceeding the set threshold" described in the above-mentioned embodiments are optimizations for selecting the target segmentation method. If the above-mentioned problems do not exist in the specific application environment, each segmentation method can also be screened only according to the target balance parameters and preset constraints, and the ideal technical effect can also be achieved, so I will not repeat them here.

Through the above-mentioned embodiments, when the network topology planning device performs network topology planning on the mobile communication network, according to the relationship matrix between the network topology units in the specified area, it obtains all the partitions of the specified area according to the preset number of partitions. A network topology planning method; and screening all the network topology planning methods according to at least one preset network load parameter to determine at least one target network topology planning method; and executing the target network topology planning method to carry out the specified area Network topology planning. In this way, the tediousness caused by manual operation or semi-manual operation is eliminated, and work efficiency is greatly improved. At the same time, since the determination of the target network topology planning method no longer depends on the experience level of the planner, Instead, it is screened according to accurate parameter settings, thus greatly improving the quality of planning solutions.

On the other hand, in this embodiment, when the network topology planning device formulates the planning scheme, in addition to setting the target balance parameters, it can also further set constraints to filter various network topology planning methods obtained. In this way, the network topology planning device In this way, two or more network load parameters can be referred to to select a suitable network topology planning method, that is, the movement amount between each network topology unit can be used to comprehensively balance carrier frequency, circuit (ET), traffic volume and Network load parameters such as paging numbers are used to screen each network topology planning method; in this way, compared with the prior art, when planners plan network topology, they can only balance one network load parameter and cannot take into account other networks at the same time. In the case of load parameters, the technical solution adopted in this embodiment further improves the quality of the planning solution.

Taking the actual application situation as an example, as shown in Table 3, after adopting the operation process of step 300-step 350 to plan the website topology for a designated area with high-density mobile user traffic, the improvement of various indicators in the designated area as follows:

table 3

Project English name Project Chinese name Existing method The method of the present invention Change reduce LU(Intra VLR) Location update within MSC 325125 226293 98832 30.30% Inter-BSC HO Switching across BSCs 277930 161459 116471 41.91% LAC Paging (equilibrium, measured by standard deviation) paging volume of location area 10080 6743 3337 33.11% LAC User (equilibrium, measured by standard deviation) The number of users in the location area 7451 4232 3219 40.20% BSC TRX (equilibrium, measured by standard deviation) Carrier frequency of BSC 39 13 26 66.70% BSC Traffic (equilibrium, measured by standard deviation) BSC traffic volume 103 25 78 75.70%

As shown in Table 3, after adopting the operation flow of the embodiment of the present invention, the following technical effects are achieved:

The number of Location Updates (LU) triggered by user movement within the MSC is reduced by 30.30%,

The number of inter-BSC handovers (Inter-BSC HO) has been reduced by about 41.91%, and the balance of the mobile communication system in terms of paging numbers, carrier frequencies, and traffic volume has increased by about 50%.

The paging volume (LAC Paging) in the location area has dropped significantly, and the paging volume is more balanced. The standard deviation has dropped from 10080 before the cutover to 6743, a drop of 33.11%:

The number of users in the location area (LAC User) is more balanced, and the standard deviation has dropped from 7451 before the cutover to 4232, a drop of 40.20%;

The carrier frequency of BSC (BSC TRX) is more balanced, and the standard deviation has dropped from 39 before the cutover to 13, a drop of 66.7%;

The BSC Traffic is more balanced, and the standard deviation drops from 103 before the cutover to 25, a drop of 75.7%.

Based on the above examples, the technical effect of re-planning the network topology after a new BSC is connected in a designated area is taken as an example to introduce in detail.

Before connecting to the new BSC, the network topology of the designated area is shown in Figure 4A, wherein, the areas marked with numbers are respectively the jurisdiction area of a BSC, BSC 73 and BSC 74 belong to the same LAC, and BSC 72 It belongs to the same LAC as BSC 76, and BSC 71 and BSC 75 belong to the same LAC.

After accessing two new BSCs, according to the operation process of step 300-step 350 of the present invention, the network topology planning of this designated area is re-planned. As shown in Figure 4B, there are 8 BSCs in the designated area, and every two BSCs To form a LAC, a total of 4 LAC areas are divided.

Then, let's introduce the impact on the Inter-BSC HO ratio first.

As shown in Table 4, because the number of BSCs has changed from 6 to 8, the number of BSCs has increased by 1.3 times, and the boundary of BSCs has increased significantly. After extracting the KPI data statistics, the handover relationship of Inter-BSC HO has increased by 1.805 times than before the cutover. If the existing technology is used to plan the network topology of the designated area, that is, the conventional manual segmentation method is carried out. Because the movement amount between the base stations is not used as a reference, it is impossible to estimate whether the selection of the LAC boundary is reasonable, so that it is impossible to consider whether it will Increase the cost of Inter-BSC HO. However, after network topology planning is performed using the operation process provided by the embodiment of the present invention, the ratio of Inter-BSC HO is basically the same as that before planning. Referring to Fig. 5, compared with the existing manual cutover mode (i.e. conventional cutover), adopting the technical solution of the embodiment of the present invention (i.e. intelligent cutover) obviously reduces the absolute value of the Inter-BSC HO ratio 17.19%. The reduction of Inter-BSC HO can greatly simplify the signaling process of handover and reduce the signaling load of BSC.

Table 4

project Inter-BSC HO ratio before planning 0.22713518 After planning using existing technology 0.41009258 After planning using the technical solution of the present invention 0.23823705

On the other hand, since the number of LACs in the indicated area changes from 3 to 4, the boundaries of LACs are also greatly increased. Compared with the manual segmentation method, the embodiment of the present invention fully considers the boundaries of LACs in different positions before segmentation. The impact on the total number of LUs, so the LAC boundary is set in an area with low user mobility, reducing the number of Intra-VLR LUs (location updates inside the VLR),) (because the MSC boundary is not changed, the Inter-VLR LU (VLR location update between ) almost no change), the reduction of LU greatly reduces the user's demand for the SDCCH channel, reduces the load of the SDCCH channel, increases the capacity of the SDCCH channel, thereby reducing the possibility of being unable to connect, increasing The connection rate is improved, and the user experience is greatly improved.

In a word, after adopting the operation process provided by the embodiment of the present invention, various network load parameters are further balanced, and the specific changes are shown in FIG. 6 .

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations in the embodiments of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the embodiments of the present invention are also intended to include these modifications and variations.

Claims (14)

1, a kind of method of carrying out network topology planning is characterized in that, comprises step:

The network topology device for planning obtains the relational matrix of each network topology unit in the appointed area;

Described network topology device for planning obtains according to the default all-network topology planning mode that number is cut apart described appointed area of cutting apart according to described relational matrix;

Described network topology device for planning screens described all-network topology planning mode according at least one default network load parameter, determines at least one objective network topology planning mode;

Carry out described objective network topology planning mode network topology planning is carried out in described appointed area.

2, the method for claim 1, it is characterized in that, described network topology device for planning will cause at least one cut zone to be deleted in the discontinuous network topology planning of physical location mode earlier before according at least one default network load parameter described all-network topology planning mode being screened.

3, as claim 1 a described method, it is characterized in that, when described network topology device for planning screens described all-network topology planning mode according at least one default network load parameter, the network topology partitioning scheme that the difference that causes the target balance parameters of at least two cut zone is surpassed setting threshold is deleted, and described target balance parameters comprises a kind of network load parameter.

4, method as claimed in claim 3, it is characterized in that, after described network topology device for planning screens described all-network topology rule mode according to described target balance parameters, according to the preset restriction condition it is screened once more, described constraints comprises at least a network load parameter that is different from described target balance parameters.

5, as claim 3 or 4 described methods, it is characterized in that, after described network topology device for planning screens described all-network topology rule mode according to described target balance parameters, perhaps, after according to described target balance parameters and described preset restriction condition described all-network topology rule mode being screened, the degree of association between at least two cut zone is surpassed the network topology planning mode that threshold value is set delete.

6, the method for claim 1, it is characterized in that, if determine at least two objective network topology planning modes, then described network topology device for planning carries out network topology planning according to described at least two objective networks topology planning mode to mobile communication system respectively.

7, as claim 1-4,6 each described methods, it is characterized in that described relational matrix comprises switching matrix, interference matrix or mobility model matrix.

8, as claim 1-4,6 each described methods, it is characterized in that described network load parameter comprises telephone traffic, paging amount, circuit number, number of users or carrier frequency number.

9, a kind of network topology device for planning is characterized in that, comprising:

Memory cell is used to store pre-conditioned, and this is pre-conditioned to comprise two kinds of network load parameters at least;

First processing unit is used to obtain the relational matrix of each network topology unit in the appointed area;

Second processing unit is used for obtaining according to the default all-network topology planning mode that number is cut apart described appointed area of cutting apart according to described relational matrix;

The screening unit is used for according at least one default network load parameter described all-network topology planning mode being screened, and determines at least one objective network topology planning mode;

Performance element is used to carry out described objective network topology planning mode mobile communication system is carried out network topology planning.

10, network topology device for planning as claimed in claim 9, it is characterized in that, described screening unit will cause at least one cut zone to be deleted in the discontinuous network topology planning of physical location mode earlier before according at least one network load parameter described all-network topology planning mode being screened.

11, network topology device for planning as claimed in claim 9, it is characterized in that, when described screening unit screens described all-network topology planning mode according at least one network load parameter, the network topology partitioning scheme that the difference that causes the target balance parameters of at least two cut zone is surpassed setting threshold is deleted, and described target balance parameters comprises a kind of network load parameter.

12, network topology device for planning as claimed in claim 11, it is characterized in that, after described screening unit screens described all-network topology planning mode according to described target balance parameters, according to the preset restriction condition it is screened once more, described constraints comprises at least a network load parameter that is different from described target balance parameters.

13, as claim 11 or 12 described network topology device for planning, it is characterized in that, after described screening unit screens described all-network topology rule mode according to described target balance parameters, perhaps, after according to described target balance parameters and described preset restriction condition described all-network topology rule mode being screened, the degree of association between at least two cut zone is surpassed the network topology planning mode that threshold value is set delete.

14, as each described network topology device for planning of claim 9-12, it is characterized in that, if at least two objective network topology planning modes are determined in described screening unit, then described performance element carries out network topology planning according to described at least two objective networks topology planning mode to mobile communication system respectively.

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