Planning method and device for physical cell identity

Abstract

The invention relates to a planning method and device for a physical cell identity. The method comprises the steps of randomly allocating PCIs (Physical Cell Identities) to cells, taking an allocationresult as an initial population; obtaining an interference matrix between serving cells and interference cells interfering the serving cells; and continuously iterating the initial population throughutilization of a genetic algorithm, thereby generating a new population which enables the sum of elements of the interference matrix to be continuously reduced, and taking the generated population asa final PCI planning result after the preset times of iteration is carried out. Compared with the existing PCI planning method, the method provided by the invention has the advantages that the overlapped coverage degree of the serving cells and the interference cells in grids is taken as one of planning allocation factors, when allocation is carried out, a complex radio communication environmentamong the cells can be taken into full consideration, and the iteration is carried out continuously through utilization of the genetic algorithm, so the optimal solution enabling the interference to be minimized is searched, planning reasonability is effectively improved, and the signal interference among the cells resulting from the unreasonable planning can be avoided.

Description

technical field [0001] The embodiments of the present disclosure relate to the field of communication technologies, and in particular to a method and device for planning a physical cell identity. Background technique [0002] After decades of rapid development and evolution, the communication technology has evolved to the LTE (Long Term Evolution, long-term evolution) stage. Compared with the previous 2G / 3G, LTE has undergone great changes, and LTE network planning and design is even more important. The LTE cellular network adopts the orthogonal frequency division multiplexing technology, and uses the physical cell identification PCI (Physical Cell Identify) to identify and distinguish sectors. PCI directly determines the cell synchronization sequence and affects the scrambling methods of multiple physical channels. In the LTE system, there are a total of 504 physical cell IDs, which are divided into 168 groups, and each group contains 3 different IDs. [0003] Generally ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present disclosure provides a physical cell identity planning method and device, which are used to overcome the defect that the existing PCI planning method does not take into account the complex wireless propagation environment, resulting in unreasonable coverage of some cells and interference.

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