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Networking method for OFDMA system

A technology for networking and users, applied in the networking field of OFDMA systems, can solve the problem of not giving a clear set, achieve high engineering application value, improve spectral efficiency, and suppress co-channel interference.

Inactive Publication Date: 2008-12-03
GLOBAL INNOVATION AGGREGATORS LLC
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Problems solved by technology

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

Method used

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  • Networking method for OFDMA system
  • Networking method for OFDMA system
  • Networking method for OFDMA system

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Embodiment Construction

[0019] In order to make better use of limited frequency resources and improve system capacity and cell edge coverage performance, on the one hand, it is necessary to use a relatively compact frequency reuse mode to improve the efficiency of frequency resource usage, but on the other hand, the lower the frequency The reuse factor will mean more potential co-channel interference. High co-channel interference will affect the user's link performance to a certain extent, especially when the edge users of adjacent cells use the same frequency resources, and the interference power and signal power are equal or even higher than the signal power, the received signal quality is serious As a result, in the selection process of the Modulation and coding scheme (MCS for short), the low carrier-to-interference ratio is even difficult to meet the requirements of the lowest-level modulation and coding scheme, resulting in frequent retransmission of data packets, thereby reducing the Spectral ...

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Abstract

The invention discloses a networking method for an OFDMA system, which comprises the following steps: step S102, frequency planning is carried out on the cells (sectors) covered by the OFDMA system; a flexible frequency reuse mode of which the frequency reuse factor is 1 is adopted between the cells (sectors); each cell (sector) is divided into a plurality of regions, different frequency resources are distributed to the users in different regions and the distribution modes of the frequency resources between the cells (sectors) are coordinated; step S104, the frequency planning of each region is carried out; the total power of a base station is divided into two parts, one of which is used for compensating path loss and the other one of which is used for power filling and judging the proportion of the path loss compensation power and the filling power. By adopting the networking method, the co-channel interference between the cells (sectors) can be effectively constrained and the link quality and the spectrum efficiency of the system can be improved.

Description

technical field [0001] The present invention relates to the communication field, and more specifically relates to a networking method for OFDMA systems. Background technique [0002] Inter-cell interference (ICI for short) between cells (or sectors) is an inherent problem in cellular mobile communication systems, and a traditional solution is to use frequency reuse. In general, the multiplexing factor adopts several specific options, such as 1, 3, 7, and so on. When the reuse factor is equal to 1, it means that adjacent cells use the same frequency resource, and the interference at the edge of the cell is very serious at this time. A higher reuse factor (such as 3 or 7) can effectively suppress inter-cell interference, but will result in lower spectrum utilization and cannot meet the growing demand of wireless services. [0003] Due to its good anti-frequency selection characteristics and high spectrum utilization efficiency, Orthogonal Frequency Division Multiplexing (OFD...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/36H04B7/04H04B7/26
CPCY02D30/70
Inventor 郝鹏张禹强顾军董翔
Owner GLOBAL INNOVATION AGGREGATORS LLC
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