Frequency spectrum resource distribution method based on topology control in cognitive radio network

A spectrum resource allocation, cognitive radio technology, applied in the field of spectrum resource allocation, can solve the problems of co-channel interference, affecting network capacity, unable to guarantee secondary user network separation, etc., to optimize performance, increase network capacity, and reduce the possibility of Effect

Inactive Publication Date: 2014-02-19
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, K-connected graphs cannot guarantee that secondary users can completely prevent network separation
In the topology control mechanism based on robust detection that fully guar...

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  • Frequency spectrum resource distribution method based on topology control in cognitive radio network
  • Frequency spectrum resource distribution method based on topology control in cognitive radio network
  • Frequency spectrum resource distribution method based on topology control in cognitive radio network

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Embodiment Construction

[0044] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0045]As mentioned in the background art, the most obvious manifestation of interference caused by authorized user activities to secondary user communication is the network separation phenomenon in the secondary user network, and this phenomenon is essentially reflected as a change in the topology of the network. Therefore, the spectrum allocation strategy for network topology control can effectively solve this problem and reduce the interference caused by authorized user activities to secondary us...

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Abstract

The invention provides a frequency spectrum resource distribution method based on topology control in a cognitive radio network. The method comprises a static state distribution method with a relatively long execution period and a dynamic distribution algorithm with a relatively short execution period, the static state distribution method comprises steps of finding an approximation algorithm of a minimum spanning tree of a maximum node degree, distributing frequency bands to links in the network according to the spanning tree, distributing distribution algorithms of additional frequency bands to a minimum cut set related with a node; the dynamic distribution algorithm comprises steps of acquiring a present network flow distribution situation, changing a frequency band distribution structure according to the present network flow distribution situation to meet present communication requirements. The method can improve robustness and capacity of a secondary user network, has relatively low calculation complex degree and optimizes performance of the cognitive radio secondary user network.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for allocating frequency spectrum resources for topology control in a cognitive network. Background technique [0002] Due to the large number of applications of wireless devices and the vigorous development of the wireless industry, the situation that spectrum resources as information carriers are being overused is becoming more and more serious. This problem is especially pronounced in unlicensed frequency bands, which are often underutilized. Cognitive radio is considered as an advanced technology capable of solving this problem. In cognitive radio technology, a secondary user (SU, secondary user) can dynamically access a frequency band when a primary user (PU, primary user) does not use the licensed frequency band. The main premise of secondary user communication is that secondary communication should not cause excessive interference to primary us...

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Application Information

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IPC IPC(8): H04W16/10H04W16/14
Inventor 郑家骁冯心欣孙高飞甘小莺刘静王新兵
Owner SHANGHAI JIAO TONG UNIV
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