Semi-static interference coordination method based on void cell in OFDMA cellular system

A cell and central area technology, applied in electrical components, wireless communication, network planning, etc., can solve problems such as the single-layer access network structure that cannot lack RNC, and the interference coordination method cannot be well adapted

Inactive Publication Date: 2009-04-08
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006] In summary, it can be seen that the previous interference coordination methods cannot well adapt to the requirements of future cellular mobile communication

Method used

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  • Semi-static interference coordination method based on void cell in OFDMA cellular system
  • Semi-static interference coordination method based on void cell in OFDMA cellular system
  • Semi-static interference coordination method based on void cell in OFDMA cellular system

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Embodiment Construction

[0030] figure 1 The flow chart of the implementation of the solution of the present invention is shown.

[0031] Hereinafter, taking the virtual cell structure in the 120° sectorized hexagonal cell system as an example, the specific implementation manner of the present invention will be described according to the implementation steps of the solution of the present invention.

[0032] figure 2 A virtual cell in a 120° sectorized hexagonal cell system is shown.

[0033] In the 120° sectorized hexagonal cell system, when the antenna direction of each sector points to the junction of two adjacent cells, each sector can be connected to the same cell in the adjacent cell Two adjacent sectors form a hexagonal virtual cell, such as figure 2 As shown, the three sectors 1, 6, and 8 in the figure can form a hexagonal virtual cell.

[0034] The present invention adopts the soft frequency multiplexing scheme based on the edge frequency band and the central frequency band orthogonal ...

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Abstract

The invention provides a semi-static interference coordination method based on a virtual subdistrict and is suitable for a broadband honeycomb mobile communication system based on OFDMA. The method uses strong mutual interference characteristics between sectors in the virtual subdistrict, takes the virtual district as a basic interference coordination unit, and uses a soft frequency reuse method of an edge frequency bank and a center frequency band being orthometric between the sectors in the virtual subdistrict; the reuse factor frf<C>=1 of a component channel of the center district of each sector and the reuse factor frf<E> of the component channel of the edge district are determined according to the average verge of each sector in the virtual subdistrict and the duty factor of the center district; frf<E> is more than one; the component channel quantity allocation of the centre and the edge of each sector in the virtual subdistrict is determined according to the duty factor of the center and the edge of each sector and is adjusted along with load distribution variation of the virtual subdistrict; the same frequency interference received by the edge area of the sector is reduced by forward planning order of priority of the component channel.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an interference coordination method in an OFDM-based broadband cellular mobile communication system. Background technique [0002] The rapid growth of mobile traffic makes people put forward higher requirements for wireless networks. Since multi-carrier modulation technology can optimize system transmission performance and improve system capacity, multi-carrier modulation technology represented by OFDM (Orthogonal Frequency Division Multiplexing) has attracted widespread attention in recent years. OFDM technology has been listed as one of the main candidate technologies for the Beyond 3G system, and people are considering using it in wireless metropolitan area networks based on IEEE 802.16 standards, wireless personal networks based on IEEE 802.15 standards, and future next-generation wireless cellular mobile communications system. [0003] OFDM technology is a m...

Claims

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Application Information

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IPC IPC(8): H04W16/02
Inventor 郑洁莹张天魁曾志民冯春燕刘银龙
Owner BEIJING UNIV OF POSTS & TELECOMM
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