Method for self-configuring physical cell identifiers (PCI)

Abstract

The invention discloses a method for self-configuring physical cell identifiers (PCI) for a honeycomb mobile communication network. The method comprises the following steps that: a network self-organization server collects the geographic position, antenna height, direction angle and downtilt information of a new base station; based on an experience path propagation model of the geographic position of the new base station, the network self-organization server calculates a path loss value and an antenna gain value between all base stations and determines a propagation loss value between all base stations; and by using a graph theory method, the network self-organization server globally optimizes reusing distances of the PCIs, allocates the optimized PCIs to the new base station, and then validates and screens the available PCIs by using a neighbor cell relationship list, so that interference between the base stations in which the same PCIs are used, and the PCIs can be accurately and reasonably configured. The method is applicable to automatic allocation of appropriate PCIs to the new base station which is not configured with the PCIs. By adoption of the method, configuration of the PCIs for the new base station can be quickly, conveniently and automatically finished, and the theoretical optimum performance can be realized.

Description

technical field [0001] The present invention relates to a method for self-configuration of physical cell identifiers, to be precise, to a method for self-configuration of base station parameters in an ad hoc network, that is, a method for automatically assigning physical cell identifiers in a wireless cellular network, belonging to mobile The technical field of communication. Background technique [0002] In a wireless ad hoc network, the PCI (Physical Cell ID) is a sequence that uniquely identifies a cell at the physical layer. Its function is to scramble the primary synchronization and secondary synchronization channels, so that the terminal can obtain the cell information while detecting the synchronization channel. logo. Since there is a one-to-one correspondence between the physical cell ID and the PSC (Primary Synchronization Code) and SSC (Secondary Synchronization Code) sequences, if adjacent cells use the same PCI, mutual interference will occur, so Reasonable all...

AI Technical Summary

Problems solved by technology

[0009] In view of this, the purpose of the present invention is to provide a self-configuration method of the physical cell identity PCI, which is used in the deployment phase of the long-term evolution network, and automatically allocates the physical cell identity to solve the conflict problem when configuring the physical cell identity ; and make the base station in the network self-configure PCI, on the basis of satisfying "no conflict" and "no confusion", at the same time, it can optimize or reduce the system interference caused by PCI multiplexing, so that the system performance is close to the theoretical The optimal value

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