A physical layer cell identification PCI optimization method in LTE network and system

Abstract

The invention discloses a PCI optimization method in an LTE long-term evolution network and a system and relates to the mobile communication technology field. In an embodiment of the invention, a genetic algorithm is used to optimize a PCI distribution scheme; relative to a traditional optimization mode, in the genetic algorithm, evolution search calculating is performed from a string set; a coverage area is large, which is good for global prioritizing; PCI signal optimization analysis is accurate and reasonable; accurate and reasonable planning and adjustment can be performed on a wireless network signal and integral performance of an LTE wireless network is radically improved and increased. Crossover operation and mutation operation are firstly performed on an auxiliary synchronization signal SSS of each PCI group in a current candidate group. And then the crossover operation and the mutation operation are performed on a main synchronization signal PSS in each PCI group so that a condition that a same PSS is distributed in a same station during PCI distribution can be avoided and a severe same-mode interference condition of a model 3, a model 6 and the like can be greatly reduced.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method and system for optimizing a physical layer cell identifier PCI in an LTE long-term evolution network. Background technique [0002] Under the LTE (Long Term Evolution, Long Term Evolution) network, the density of base stations is higher than that of 2G and 3G networks, and the distance between stations is smaller. There are obvious problems such as cell coverage planning and unreasonable PCI planning, which lead to common-mode interference and other problems, which affect wireless network performance. [0003] With the large-scale construction of the LTE network, the scientific and efficient analysis and optimization of the same-mode interference of the LTE wireless network is a key link to ensure the construction quality of the LTE wireless network. [0004] Therefore, it is necessary to explore new signal interference optimization analysis techniqu...

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Problems solved by technology

[0002] Under the LTE (Long Term Evolution, long-term evolution) network, the density of base stations is higher than that of 2G and 3G networks, and the distance between stations is small; there are obvious problems such as cell coverage planning and unreasonable PCI planning, which lead to common-mode interference and other problems, which affect wireless network performance.

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