Physical cell identifier (PCI) interference self optimization method and PCI interference self optimization device

Abstract

The invention provides a physical cell identifier (PCI) interference self optimization method and a PCI interference self optimization device. The method comprises steps: the correlation between a first PCI and a second PCI is acquired, wherein the first PCI is the PCI corresponding to a target cell, and the second PCI is the PCI corresponding to an adjacent cell with the same frequency as the target cell; based on measurement reports, backstage switching indexes and sweep frequency data of the target cell and the adjacent cell with the same frequency, a PCI comprehensive interference factor of the target cell is determined according to the correlation; if the PCI comprehensive interference factor of the target cell is larger than a threshold value, the target cell is determined to be a PCI high interference cell; and the target PCI is selected for the target cell according to a preset rule, and the PCI corresponding to the target cell is changed to be the target PCI. The embodiment of the invention effectively solves the limitations of the traditional PCI optimization, the PCI optimization accuracy is improved, and the PCI change can be adapted to network changes flexibly and timely.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a PCI interference self-optimizing method and device for physical cell identifiers. Background technique [0002] In LTE co-frequency networking, the interference within the system mainly comes from between cells, among which PCI interference is the most serious. The LTE system includes 504 PCIs (Physical Cell Identifier, physical cell identifier) ​​in total. These PCIs were divided into 168 groups, each consisting of 3 PCIs. PCI determines whether cell signal synchronization and random access are successful. Each E-UTRAN (access network part of the third-generation mobile communication) cell corresponds to a unique PCI. When there is a lot of data in the E-UTRAN cells in the LTE network, PCI multiplexing will inevitably occur, that is, multiple E-UTRAN cells use the same PCI. Due to unreasonable PCI planning, manual adjustment of PCI, modification of adjacent ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for PCI interference self-optimization of physical cell identification, which solves the problem that the consideration factors of PCI optimization in the prior art are not comprehensive and the modification of PCI depends entirely on the experience of engineers and cannot respond to network changes in time

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