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Dynamic networking method for OFDMA access system

An orthogonal frequency division multiple access and access system technology, which is applied in the field of networking technology of orthogonal frequency division multiple access cellular systems, can solve problems such as not giving a clear set, achieve optimal configuration, and improve spectrum efficiency effect

Inactive Publication Date: 2008-12-17
王加双
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AI Technical Summary

Problems solved by technology

During the standard evolution process of the cellular system, the idea of ​​combining frequency reuse and power planning (allocation) was proposed for the networking scheme, but how to combine it has not yet given a set of clear schemes, but the basic goal is to achieve high performance The power planning (allocation) scheme achieves a relatively compact frequency reuse mode and realizes the efficient use of frequency resources

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  • Dynamic networking method for OFDMA access system
  • Dynamic networking method for OFDMA access system
  • Dynamic networking method for OFDMA access system

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Embodiment Construction

[0026] In order to make better use of the limited frequency resources and improve the system capacity and coverage performance at the edge of the cell (sector), on the one hand, it is necessary to use a relatively compact frequency reuse mode as much as possible to improve the efficiency of frequency resources. A higher frequency reuse factor will mean more potential co-channel interference. High co-channel interference will affect the link performance of users to a certain extent, especially when edge users of adjacent cells (sectors) use the same frequency resources, and the interference power and signal power are equal or even higher than the signal power. At that time, the quality of the received signal is seriously degraded, so that in the selection process of the modulation and coding scheme MCS (Modulation and Coding Scheme), the lower carrier to interference ratio (CIR) cannot even meet the requirements of the lowest level modulation and coding scheme. Data packets are fre...

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Abstract

The invention discloses a dynamic networking method of a orthogonal frequency division multiple access system, for performing the optimizing configuration on the system resource and advancing the frequency spectrum efficiency of the network, comprising: dividing the district into a plurality of areas by a network controller or a station, distributing the routine sub-carrier for each area in the time of frequency program and reserving the sub-carrier, and performing the dynamic distribution on the reserved sub-carrier between each area according to the change of the operation requirement in the system operating process; determining the ratio of the compensating power and the water injecting power in the time of power planning by the network controller or the station, and distributing the compensating power and the water injecting power for each area, and in the system operating process, the dynamic adjustment is processed according to the disturbing condition of the adjacent area or the change of the operation distribution of the district on the transmitting power of each district.

Description

Technical field [0001] The present invention relates to networking technology in the field of digital communication, and in particular to networking technology for Orthogonal Frequency Division Multiple Access (OFDMA) cellular systems. Background technique [0002] Inter-cell interference (ICI) is an inherent problem of cellular mobile communication systems. The traditional solution is to use frequency reuse. In general, the multiplexing factor adopts several specific choices, such as 1, 1 / 3, 1 / 7, etc. If the reuse factor is equal to 1, it means that the neighboring cells all use the same frequency resource, and the interference on the edge of the cell is very serious. A lower reuse factor (such as 1 / 3 or 1 / 7) can effectively suppress inter-cell interference, but will result in lower spectrum utilization and cannot meet the growing demand for wireless services. [0003] Due to its good anti-frequency selection characteristics and high spectrum utilization efficiency, Orthogonal F...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/208H04B7/005H04Q7/36
Inventor 郝鹏戴博顾军牛凯
Owner 王加双
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