OFDM-based cell user communication method and system thereof

A technology of orthogonal frequency division and communication method, which is applied in the field of cell user communication method and its system, and can solve the problems of reducing frequency utilization, CDMA system user capacity limitation, incomplete elimination of intra-cell user interference and inter-cell user interference, etc. problem, achieve the effect of reducing frequency resources and increasing user capacity

Inactive Publication Date: 2007-09-19
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] The first is to use different frequencies to carry data between adjacent cells, so as to avoid mutual interference between users in the cells, but this solution is due to the use of different frequencies between adjacent cells to carry data. , thus naturally reducing the frequency utilization;
[0006] The second is based on Code Division Multiple Access (CDMA) technology. All adjacent cells use the same frequency to carry data to obtain higher freq

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  • OFDM-based cell user communication method and system thereof
  • OFDM-based cell user communication method and system thereof
  • OFDM-based cell user communication method and system thereof

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[0054]Since OFDM technology will be widely used in cellular mobile communication systems, in order to increase the user capacity of mobile communication systems, how to reduce the inherent intra-cell user interference and inter-cell user interference in the OFDM cellular mobile communication system will be a very important issue. The problem, the technical solution of the present invention is mainly aimed at this kind of situation, and takes advantage of the relatively severe inter-cell interference for mobile users located at the cell boundary, and proposes an OFDM scheme for user grouping based on the interference situation, thereby causing inter-cell user interference and cell interference. The internal user interference is greatly reduced to fundamentally increase the user capacity of the mobile communication system.

[0055] In an OFDM mobile communication system, multiple subcarriers are generally used to transmit communication data in parallel, that is, several OFDM symbols...

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Abstract

The present invention discloses a community users communication method based on the orthogonal frequency division multiplexing, including carrying out the grouping handling to users in each community in the orthogonal frequency division multiplexing mobile communication system; and making different groups users in the community occupy different time domain symbol resources to process the communication data transmission. Accordingly the present invention also discloses a community users communication system based on the orthogonal frequency division multiplexing. The present invention can reduce interference between users in one community and interference between communities in the mobile communication system.

Description

technical field [0001] The present invention relates to Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplex) technology in the field of mobile communication, in particular to a cell user communication method and system based on Orthogonal Frequency Division Multiplexing. Background technique [0002] At present, multi-carrier technology has become a hot technology in broadband wireless communication. Its basic idea is to divide a broadband carrier into multiple sub-carriers, and transmit data simultaneously on the divided multiple sub-carriers. Among them, Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplex) technology is a more representative technology among multi-carrier technologies. It divides a given channel into several orthogonal sub-channels in the frequency domain and allows sub-carriers The frequency spectrum partially overlaps, because as long as different subcarriers are mutually orthogo...

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Application Information

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IPC IPC(8): H04Q7/36H04L27/26H04B7/26
CPCH04L5/0062H04L5/0007
Inventor 李斌
Owner HUAWEI TECH CO LTD
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