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Physical cell identification distribution method

A technology of physical cell identification and distribution method, which is applied in the field of physical cell identification distribution, can solve problems such as waste of PCI resources, PCI conflicts in cells, large manpower and material resources, etc., and achieve the effect of improving the distribution effect and avoiding conflicts

Inactive Publication Date: 2016-05-25
HEBEI COMM DESIGN & CONSULTATION
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Problems solved by technology

This distribution method is simple and mechanized in principle, and consumes a lot of manpower and material resources
In addition, the selection of the PCI multiplexing distance is a key issue. If the multiplexing distance is too short, it will cause collision and confusion of PCI in adjacent cells, and if it is too far away, it will lead to waste of PCI resources.

Method used

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Embodiment Construction

[0026] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0028] Before describing the embodiment of the present invention in detail, it should be noted that Welsh-Powell coloring is a strategy based on the highest degree first, and coloring is performed in descending order of the degrees of vertices. The PCI self-configuration algorithm based on Welsh-Powell dyeing aims at large-scale networking scenarios in the initial stage of network deployment, and transforms the traditional PCI self-configuration problem into the vertex coloring problem in graph theory.

[0029] In an actual LTE network, the number of cells is far more than 504, so the PCI needs to be multiplexed. In order to avoid PCI conflicts that may be faced in future network expans...

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Abstract

The invention relates to the technical field of LTE mobile communication, and especially relates to a physical identification distribution method. The method comprises the following steps: determining an identification distribution region; determining base stations Vj in the region, connecting the base stations Vj which are in correlation so as to determine a correlation side Ek, forming a network node point-side relational graph, and generating a point-side relation matrix Ajk corresponding to the network node point-side relational graph; carrying out the relevancy calculation of all base stations according to the point-side relation matrix Ajk, and ordering the base stations Vj according to the sequence of the relevancy from the big to the small; assigning usable SSSs with different colors, ordering the SSSs from the small to the big, and sequentially distributing the PCI of all SSSs to cells corresponding to the base stations according to the order of the base stations at step 3. According to the technical scheme of the invention, the method carries out the distribution of the PCIs through the point-side relation matrix Ajk and a coloring algorithm, effectively avoids conflict, mixing and interference between the cells, and effectively improves the distribution effect of the physical cells.

Description

technical field [0001] The invention relates to the technical field of LTE mobile communication, in particular to a method for allocating physical cell identifiers. Background technique [0002] After the cellular mobile communication evolves to the LTE stage, the air interface technology adopts OFDM to form a network, and a physical cell identifier (Physical Cell Identifier, PCI) is used to identify a cell. For the user, the PCI is an important parameter for communication between the terminal and the base station: the PCI is used to identify the serving cell and the adjacent cell. However, in an actual network environment, due to limited PCI resources, the uniqueness of the PCI of each cell cannot be guaranteed. Therefore, densely deployed cells in the existing network need to solve this problem through PCI multiplexing. Therefore, 3GPP discusses the principle of PCI multiplexing allocation in the relevant specification agreement: non-conflict criterion: all types of cell...

Claims

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Application Information

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IPC IPC(8): H04W24/02
CPCH04W24/02
Inventor 白月维张慧丽段庆耿朋进马蓁
Owner HEBEI COMM DESIGN & CONSULTATION
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