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GSM-R (GSM-railway) network frequency planning method and system

A GSM-R, network frequency technology, applied in network planning, electrical components, wireless communication, etc., to achieve accurate results, strong operability, and save investment

Active Publication Date: 2015-07-22
CHINA RAILWAYS CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems when using these network planning software to plan the GSM-R network

Method used

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  • GSM-R (GSM-railway) network frequency planning method and system
  • GSM-R (GSM-railway) network frequency planning method and system
  • GSM-R (GSM-railway) network frequency planning method and system

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0237] Take Beijing South Railway Station Hub as an example:

[0238] First import the base station parameters in the hub of Beijing South Railway Station. In this example, there are 16 base stations involved in frequency planning, and all of them are two-carrier frequency base stations. Direction angle, lobe width, vertical half power angle, transmit power, receive sensitivity, antenna gain and other parameters are imported into the software through excel.

[0239] Select the propagation model of each base station, or import the propagation model code together with the base station parameters in 1) through the excel form. The propagation model selected in this example is model 0, which is the viaduct propagation model; then select the coverage model, The coverage model selected in this example is a hybrid propagation model, which is a hybrid model obtained after comprehensively considering the geometric model and the propagation model. On the basis of the hybrid model, the co...

example 2

[0243] By changing the working parameters of some of the base stations, such as antenna height or downtilt angle, and changing the propagation model of some base stations, a new coverage area is obtained, and then repeating steps 1)-4) in Example 1, according to the new base station Engineering parameters to get a new frequency allocation scheme, the results are as follows Figure 8 shown.

example 3

[0245] By changing the setting parameters of the genetic algorithm, the number of iterations in the first genetic algorithm was increased from 500 to 2000, the selection rate in the algorithm was increased from 0.35 to 0.4, and the crossover rate was increased from 0.15 to 0.25, and a new The frequency allocation scheme, the result is as follows Figure 9 shown.

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Abstract

The invention relates to a GSM-R (GSM-railway) network frequency planning method and system. The method includes the steps of 1, receiving model parameter information including base station parameter information, propagation model information and system parameter information; 2, selecting a propagation model according to the propagation model information, and determining a coverage radius model according to the base station parameter information; 3, calculating coverage radius according to the propagation model and the coverage radius model; 4, by subjecting a cell within the coverage radius to the modified genetic algorithm, performing calculating to obtain a frequency division scheme, and transmitting the frequency division scheme to multiple base stations; 5, predicting effect of the frequency division scheme, and sending an alarm message for each base station with poor effect; 6, subjecting the base stations with poor effect to network optimization, thus ending. The GSM-R network frequency planning method and system is highly applicable to railways, is lower in investment and high in operability, is oriented to engineering and has accurate results.

Description

technical field [0001] The invention relates to a method and system for GSM-R network frequency planning. Background technique [0002] Existing Frequency Planning Method of GSM-R System [0003] At present, public network (mobile GSM, China Unicom GSM) Fixed Channel Allocation (FCA) frequency multiplexing (area multiplexing or strip multiplexing) is commonly used in GSM-R wireless network planning and frequency planning, without GSM -R wireless network's special strip coverage characteristics (single network coverage, interwoven single network redundant coverage and double network redundant coverage, etc.), the complexity of the line propagation environment (plain coverage, mountain Coverage, etc.) and the particularity of users (low-speed mobile, medium-speed mobile, high-speed mobile, individual call, group call, etc.) and so on. [0004] According to needs, the base station can adopt N-cell strip multiplexing mode. [0005] [0006] Table 1 N cell strip multiplexin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/18H04W72/04
Inventor 李栋齐大明高大纲佟强吴书伟张炳淑
Owner CHINA RAILWAYS CORPORATION