Parallel frequency spectrum distribution method for preventing interference in cognitive radio system

A cognitive radio and interference avoidance technology, applied in the field of wireless communication, can solve the problems of prolonged allocation time period, inability to adapt to the rapid time change of idle frequency spectrum, inability to use the same frequency spectrum, etc., to achieve the effect of increasing flexibility

Inactive Publication Date: 2006-09-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

The second type is interference between unlicensed users, two unlicensed users who interfere with each other cannot use the same spectrum at the same time
[0032] The disadvantage of the above method is that the execution time overhead of the spectrum allocation method increases with the increase of the number of free spectrums. When the number of available spectrums increases, the allocation time period will be extended accordingly, which makes the spectrum allocation method unsuitable for cognitive radio. Rapid time-varying requirements of idle spectrum in

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  • Parallel frequency spectrum distribution method for preventing interference in cognitive radio system
  • Parallel frequency spectrum distribution method for preventing interference in cognitive radio system
  • Parallel frequency spectrum distribution method for preventing interference in cognitive radio system

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Embodiment Construction

[0076] A specific example of the present invention is as follows, the parameter setting does not affect the generality, assuming that the number N=6 of unlicensed users in the cognitive radio system, the users are represented by U0-U5; the number of spectrum M=6, and the frequency band is represented by F0-U5 F5 means that the allocation vector of each frequency band is respectively represented by a 0 a 1 …a 4 a 5 means that a m =(a n，m , 0≤n≤5), a n，m = 1 means that the frequency band Fm is allocated to the user Un, when initializing a m All elements are reset to 0. The process of allocating the frequency band F0 in the parallel spectrum allocating method will be described in detail below. The allocation of other frequency bands is carried out independently at the same time, and the operation steps are similar to the allocation of the frequency band F0.

[0077] Step 1: Detect which secondary users are allowed to use the frequency band F0, and obtain the free spectr...

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Abstract

This invention relates to a method for parallel frequency spectrum distribution avoiding interference in a radio system especially to that in CR system including testing usable spectrum resources, computing the gain of users, obtaining an interference matrix by testing the mutual interference, selecting the target rule of the spectrum distribution, computing the gain of the user at the band m and distributing frequency bands, in the total distribution process, all steps to the band M spectrum can be done independently to reduce the cost and shorten the distribution period.

Description

technical field [0001] A parallel frequency spectrum allocation method for avoiding interference in a cognitive radio (Cognitive Radio) system belongs to the technical field of wireless communication, and in particular relates to frequency spectrum allocation applied in a cognitive radio system. Background technique [0002] With the continuous expansion of wireless applications, the lack of spectrum resources has become an unavoidable problem in the process of wireless application research. However, from some research results, it can be seen that the lack of spectrum resources is more caused by the unreasonable use of wireless access technologies. of. The existing spectrum allocation methods for different wireless communication systems are mainly based on a fixed allocation method, that is, a certain wireless spectrum block is allocated to a specific wireless access network, and then the wireless spectrum block is divided into several spectrum sub-blocks. The size of the s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/36H04Q7/38H04W16/14H04W72/04
Inventor 廖楚林陈劼唐万斌
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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