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A method and device for planning PCI in an LTE network

A network and equipment technology, applied in the field of PCI planning, can solve problems such as inter-cell interference, reference signal interference, and no solution proposed, and achieve the effect of avoiding inter-cell interference and avoiding conflicts

Active Publication Date: 2016-12-21
CHINA MOBILE GROUP DESIGN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A method and device for planning PCI in an LTE network
  • A method and device for planning PCI in an LTE network
  • A method and device for planning PCI in an LTE network

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Embodiment Construction

[0023] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0024] The Physical Cell ID (PCI, Physical Cell ID) of the LTE network has a value ranging from 0 to 503, and there are 504 PCIs in total. Each LTE cell needs a PCI to distinguish it from neighboring cells; when a terminal accesses the network, it can determine and access each physical cell according to the PCI. The number of cells in an LTE network is inexhaustible, but there are only 504 physical cell identities, so PCI must be reused; if different cells use the same PCI, it is necessary to ensure that the distance between these cells is far enough—that is, the reuse distance is sufficient In order to avoid confusion and interference when accessing the terminal.

[0025] The reference signal is used for channel measurement and demodulation signals in ...

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Abstract

Embodiments of the present invention provide a method and device for planning PCI in an LTE network. The method includes: allocating PCI resource segments for the cell cluster according to the geographic location of the cell cluster. Each cell cluster includes at least one base station, and each cell cluster includes at least one base station. A base station includes at least one cell, and each PCI resource segment includes multiple PCIs; in the same cell cluster, at least one PCI triple pair is constructed according to the PCI resource segment, and the PCI triple pair contains three parameters, with The residual values ​​of parameter one, parameter two and parameter three modulo 3 in a PCI ternary pair are not equal; according to the geographical direction between each base station in the cell cluster, the allocation sequence of the PCI ternary pair is determined, Allocating at least one PCI triplet pair to each base station according to the allocation order. It avoids conflicts caused by multiplexing PCIs, and avoids inter-cell interference caused by unreasonable allocation of PCIs.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/12H04W16/18
Inventor 郭建光刘晓力李晓明徐长胜王超郝益刚景岗卢凤晖陈新艾秀青
Owner CHINA MOBILE GROUP DESIGN INST