PCI (Physical Cell Identifier) adjustment method and device under different frequency networking

Abstract

The invention provides a PCI (Physical Cell Identifier) adjustment method and device under different frequency networking. The method comprises the following steps: step S1, determining neighboring cells of various cells in a target area; step S2, sorting various cells according to the priority; step S3, letting i=0; step S4, selecting the ith cell, and judging whether the number of the neighboring cells of the cell meets the different frequency networking requirement of the current different frequency points number Nf, if yes, executing S5, otherwise, executing S6; step S5, allocating a module value for the cell so as to allocate a PCI from an available PCI, and letting i=i+1 and returning to step S4 until all cells are selected; and step S6, if Nf is less than MaxF, then adjusting Nf=Nf+1 and returning to step S4, if Nf=MaxF, and the number of the neighboring cells of the cell still does not meets the different frequency networking requirement of the current different frequency points number, for the neighboring cell that the module value is not allocated to, adopting a local different frequency mode to allocate the module value for the cell so as to allocate the PCI from the available PCI, and letting i=i+1 and returning to step S4 until all cells are selected. The PCI adjustment method under the different frequency networking provided by the invention can solve the PCI allocation conflict problem caused by the unreasonable number of the neighboring cells under the different frequency networking

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a PCI adjustment method and device under different frequency networking. Background technique [0002] In wireless communication, the Long Term Evolution LTE system uses a Physical Cell Identifier (PCI for short) for identification to realize functions such as distinguishing sectors and performing channel isolation as part of the input of a channel scrambler. In the LTE protocol, the value of PCI is 0 to 503, totaling 504, which are divided into 3 groups, and each group contains 168 different identification IDs. [0003] When performing PCI planning, the following three principles generally need to be followed (assuming that the number of different frequencies in the different frequency network is Nf): [0004] 1. Non-conflict principle: ensure that the PCI modulo Nf values ​​of a certain cell and its neighboring cells are not the same. Such as figure 2 ...

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Problems solved by technology

[0009] In order to solve the above-mentioned technical problems, the present invention provides a method and device for adjusting PCI in a different-frequency network, which solves the problem of PCI allocation conflicts caused by the unreasonable number of adjacent cells in a different-frequency network in the prior art

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