PCI adjustment method and device under different frequency networking

Abstract

The present invention provides a PCI adjustment method and device under a different-frequency networking. The method includes: S1 determining the neighbors of each cell in the target area; S2 sorting each cell according to the priority; S3 setting i=0; S4 selecting the i-th cell, Judging whether the number of adjacent cells in this subdistrict meets the current inter-frequency frequency point number Nf inter-frequency networking requirements, if executing S5, if not performing S6; S5 distributes the modulus for the sub-district and then distributes PCI from the available PCI, with i=i +1 and return to S4 until all cells have been selected; S6 if Nf<MaxF, then adjust Nf=Nf+1 and return to S4, if Nf=MaxF and the number of adjacent cells in this cell still does not meet the current number of different frequency points If different frequency networking is required, the local different frequency method is adopted for the adjacent cells that have not assigned the module value to allocate the module value for this cell and then allocate the PCI from the available PCI, return i=i+1 and return to S4 until all cells have been selected. The invention can solve the PCI allocation conflict problem caused by the unreasonable number of 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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