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Frequency reuse method

A frequency reuse and user technology, applied in the field of frequency reuse, can solve problems such as low spectrum utilization efficiency, achieve the effects of improving cell edge performance, avoiding interference, and improving coverage and throughput performance

Inactive Publication Date: 2011-05-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this frequency reuse scheme is that the spectrum utilization efficiency is very low

Method used

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Embodiment Construction

[0028] Such as figure 2 As shown, the frequency reuse method provided by the embodiment of the present invention includes:

[0029] Step S1, plan the Zone in the OFDMA frame. This step will combine image 3 Be specific.

[0030] Step S2, plan the number of symbols occupied by the Zone in the time domain, plan the number of subcarriers occupied by the Zone in the frequency domain, plan the power allocation of the areas in the Zone, and plan the threshold for terminals to enter areas in different Zones. Wherein, the threshold may be the signal quality reported by the terminal, and the signal quality includes the preamble CINR (Carrier to Interference plus Noise Ratio, carrier to interference noise ratio) or the CINR of the data subcarrier or the CINR of the pilot. It is determined that the different areas in the Zone that the terminal enters will be combined Figure 4 Be specific.

[0031] Wherein, planning the number of symbols occupied by a Zone in the time domain is spe...

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Abstract

The invention relates to the field of wireless communication, and discloses a frequency reuse method. The method comprises the following steps of: planning a Zone in an orthogonal frequency division multiple access (OFDMA) frame; planning the number of symbols occupied by the Zone in a time domain, the number of subcarriers occupied by the Zone in a frequency domain, and power distribution of areas in the Zone; and planning thresholds for a terminal entering different areas in the Zone to determine different entry areas of the Zone of the terminal. The frequency reuse method improves frequency utilization ratio, improves the coverage and throughput performance of a cellular network, avoids interference and improves cell-edge performance.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a frequency reuse method. Background technique [0002] Orthogonal Frequency Division Multiple Access (OFDMA) technology is a multi-carrier transmission technology, which is a technology for high-speed transmission in a wireless environment developed from multi-carrier modulation (MCM). Most of the frequency response curves of wireless channels are non-flat, and the main idea of ​​OFDMA technology is to divide a given channel into many orthogonal sub-channels in the frequency domain, modulate each sub-carrier on each sub-channel, and perform parallel transmission on each sub-carrier . In this way, although the overall channel is non-flat and has frequency selectivity, each sub-channel is relatively flat, and narrowband transmission is performed on each sub-channel, and the signal bandwidth is smaller than the corresponding bandwidth of the channel, so the signal waveform ca...

Claims

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Application Information

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IPC IPC(8): H04W16/18H04W72/08H04L27/26H04W16/02
Inventor 吴桂蓝
Owner ZTE CORP
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