Method and equipment for planning PCI in LTE network

Abstract

The embodiment of the invention provides a method and equipment for planning a PCI in an LTE network. The method includes the steps of allocating PCI resource sections for cell clusters according to the geographical positions of the cell clusters, wherein each cell cluster comprises at least one base station, each base station comprises at least one cell, and each PCI resource section comprises a plurality of PCIs, constructing at least one PCI ternary pair according to the PCI resource section in the corresponding cell cluster, wherein each PCI ternary pair comprises three parameters, and residual values of modulus 3 of the parameter I, the parameter II and the parameter III in the same PCI ternary pair are unequal, determining the allocating order of the PCI ternary pairs according to the geographical directions of the base stations in the cell clusters and allocating at least one PCI ternary pair for each base station according to the allocating order. According to the method and equipment, conflicts generated due to the fact that the PCIs are multiplexed are avoided, and interferences among the cells caused by unreasonable allocation of the PCIS are avoided.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a method and equipment for planning PCI in an LTE network. Background technique [0002] In the Long Term Evolution (LTE, Long Term Evolution) network, PCI (Physical Cell ID, physical cell identification) corresponds to the combination of orthogonal sequences and pseudo-random sequences. The protocol defines 504 PCIs. In order to avoid inter-cell interference, the protocol requires: No conflict, any two adjacent same-frequency cells cannot use the same PCI; no confusion, no two same-frequency cells in all neighboring cells of a cell can use the same PCI; PCI is tied to the common reference signal of the cell The value of PCI directly determines the time-frequency position of the reference signal. In a dual-port network, if the value of PCI modulo 3 is equal, the time-frequency position of the reference signal is the same. In a single-port network, the residual valu...

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Problems solved by technology

[0004] The defect of the prior art is that if the residual values ​​of the PCI modulo 3 of adjacent cells are equal, the time-frequency positions of the reference signals are the same. Although the principle of PCI non-conflict and non-confusion is met, it will lead to conflicts between the reference signals. Severe interference, the inter-cell interference caused by it is unbearable by the network, and the existing technology has not proposed related solutions

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