Dynamic frequency allocation method for cognitive radio cellular network

A cognitive radio and dynamic frequency technology, applied in the field of cognitive radio, can solve problems such as cognitive radio systems that have not been applied

Inactive Publication Date: 2011-04-20
YANGTZE UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cellular network, which is already technically very mature, has not been applied to the cognitive radio system. So far, the dynamic frequency allocation method of the cognitive radio cellular network is still a blank in domestic and international research.

Method used

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  • Dynamic frequency allocation method for cognitive radio cellular network
  • Dynamic frequency allocation method for cognitive radio cellular network
  • Dynamic frequency allocation method for cognitive radio cellular network

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Experimental program
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Embodiment Construction

[0042] A method for dynamic frequency allocation of a cognitive radio cellular network, comprising the following steps:

[0043] According to the available frequency information of each cellular cell, a real-time interference frequency table is generated by the network control center, and the interference frequency table can make the frequency allocated by each cellular cell not cause interference to authorized users. The available frequency information of each cell is acquired by the base station and the cognitive mobile user after performing spectrum sensing on the surrounding wireless environment.

[0044] Construct a cost function according to the interference frequency table, the frequency demand number of each cell, and the frequency allocation constraints between cells, and use the noise chaotic neural network (NCNN) method to minimize the value of this cost function; The function is represented as follows:

[0045] Formula 1):

[0046] E = ...

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Abstract

The invention relates to a dynamic frequency allocation method for a cognitive radio cellular network, belonging to the technical field of cognitive radio. The dynamic frequency allocation method comprises the following steps: creating a real-time interference frequency list according to available frequency spectrum information of each cell sensed by a base station and a cognitive mobile subscriber; then creating a cost function according to the number of frequencies required by each cell and inter-cell interference constraint conditions; and minimizing the cost function by a noise chaotic neural network method, thus meeting the frequency requirement of each cell, avoiding interference to an authorized user, also avoiding inter-cell interference and maximizing the frequency spectrum utilization. Meanwhile, in the invention, the frequency with minimum number of each cell is locked, so that each cell can be relatively stably allocated with one frequency as a common control channel.

Description

Technical field: [0001] The invention relates to a dynamic frequency allocation method of a cognitive radio cellular network, belonging to the technical field of cognitive radio. Background technique: [0002] Since the birth of wireless communication technology, in order to effectively manage the limited spectrum resources in the air, the use of wireless spectrum resources has been uniformly planned by government departments, and then each frequency band is allocated to designated users. These users are called authorized users. Unauthorized users are not allowed to use. Almost all existing spectrum resources have been allocated to corresponding authorized users. [0003] However, research and surveys in recent years have found that the spectrum utilization rate of those frequency bands that have been allocated to authorized users is actually not high. For example, only 10% of the frequency bands in the wireless broadcasting TV band are used, and the rest of the frequency b...

Claims

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Application Information

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IPC IPC(8): H04W16/10H04W72/04
Inventor 赵承志卢光跃
Owner YANGTZE UNIVERSITY
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