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Self-adaptive method for multi-channel assignment in cognitive radio network

A cognitive radio and allocation method technology, applied in the field of adaptive multi-channel allocation, can solve problems such as not being able to take into account cognitive users well, and achieve the effect of avoiding waste

Active Publication Date: 2014-12-03
XIDIAN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is only suitable for single-channel allocation, and it cannot take into account cognitive users with different bandwidth requirements. For users with large bandwidth requirements, a single channel cannot meet their actual needs.

Method used

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  • Self-adaptive method for multi-channel assignment in cognitive radio network
  • Self-adaptive method for multi-channel assignment in cognitive radio network
  • Self-adaptive method for multi-channel assignment in cognitive radio network

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Embodiment Construction

[0028] refer to figure 1 , the cognitive radio network system used in the present invention is composed of one authorized base station, one cognitive base station, multiple authorized users and multiple cognitive users. Wherein, each authorized user uses its own authorized channel to communicate with the authorized base station. Cognitive users can access these authorized channels to fulfill their own communication needs without interfering with the normal communication of authorized users.

[0029] refer to figure 2 , the specific implementation of the present invention is as follows:

[0030] Step 1: The preparatory work for channel allocation by the cell cognitive base station:

[0031] First, initialize the channel assigned by the cognitive user;

[0032] Second, perceive the channel occupied by each authorized user, and determine the bandwidth w used by each authorized user c ;

[0033] Finally, the access permission information is broadcast to inform each cognitiv...

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Abstract

The invention discloses a self-adaptive method for multi-channel assignment in a cognitive radio network. The method mainly solves the problem that an existing method for channel assignment in the cognitive radio network cannot meet the requirement of cognitive users for large bandwidth. The method includes the specific steps that first, a cognitive base station initializes channels assigned to the cognitive users and senses channels occupied by authorized users; second, the cognitive users send user state information and channel gain information to the cognitive base station according to the geographical positions and the bandwidth requirements of the cognitive users and the interference to each authorized user; third, the cognitive base station assigns the channels after receiving the information sent by the cognitive users; fourth, after the assignment is finished, the cognitive base station broadcasts channel assignment information to every cognitive user. Through the method, the requirement of users for large bandwidth can be met, unnecessary bandwidth waste can be avoided, and while the spectral efficiency is improved, it is guaranteed that the channel assigned to each user has high channel quality. The method can be used for assigning channels to cognitive users with disperse geographical positions in the cognitive radio network.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to an adaptive multi-channel allocation method in a cognitive radio network, which is used to solve the problem of channel allocation among geographically dispersed cognitive users in the cognitive radio network. Background technique [0002] In recent years, with the rapid development of wireless mobile communications, the scarcity of spectrum resources has been unable to meet the growing needs of people for wireless data services. In order to solve this problem, a software-defined radio—cognitive radio is produced. It can dynamically perceive spectrum holes in the space, and use these spectrums without interfering with authorized users, thus greatly improving spectrum utilization. In cognitive wireless networks, in order to coordinate the mutual interference among cognitive users, it is very important to formulate effective spectrum allocation strategies to impro...

Claims

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Application Information

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IPC IPC(8): H04W72/04
Inventor 陈健贺冰涛阔永红周雨晨杨龙
Owner XIDIAN UNIV
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