Whole-network LTE cell PCI planning method and device

Abstract

The invention relates to the technical field of LTE networks and provides a whole-network LTE cell PCI planning method and device. The method includes the steps of planning the whole-network PCI initially, building a whole-network interference matrix, calculating an adaptability function value according to the interference matrix, judging whether the adaptability function value meets the condition of convergence or not, outputting the current whole-network PCI plan when the adaptability function value meets the condition of convergence, and carrying out crossing and variation for replanning when the adaptability function value does not meet the condition of convergence. The whole-network LTE cell PCI planning method and device are provided on the basis of a genetic algorithm. The interference matrix is built through the initialized whole-network PCI plan at first, the interference degree is evaluated by calculating the adaptability function value, whether crossing and variation are carried out on species again or not is determined until the optimal plane is output, network optimization personnel can be helped to plan the whole-network LTE cell PCI rapidly and accurately, and therefore the working efficiency of the network optimization personnel is improved.

Description

technical field

[0001] The invention belongs to the technical field of LTE networks, and in particular relates to a method and device for planning PCI of LTE cells in the whole network. Background technique

[0002] In the LTE system, the base station can self-configure the PCI of a certain cell, and according to the protocol TS 36.300, 504 PCI (Physical Layer Cell ID, physical layer cell identification) values ​​are defined in the LTE (LongTerm Evolution, long-term evolution) system ( 0 to 503), in this way, there must be situations where different cells use the same PCI. If the center frequencies of two cells using the same PCI are also the same, severe inter-cell interference will be caused. Therefore, the automatic configuration of the PCI of the cell must meet the requirements of non-conflict and non-confusion of PCIs. Among them, PCI non-conflict means that any two adjacent same-frequency cells cannot use the same PCI; PCI non-confusion means that no two same-frequen...

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