Spectrum Resource Allocation Method Based on Topology Control in Cognitive Radio Networks

A spectrum resource allocation and cognitive radio technology, applied in the field of spectrum resource allocation, can solve problems such as the inability to guarantee the separation of secondary user networks, affect network capacity, and co-channel interference, so as to reduce the possibility, increase network capacity, and optimize performance Effect

Inactive Publication Date: 2016-12-28
SHANGHAI JIAOTONG 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 guarantees connectivity, too many frequency bands are allocated to different data links, and the phenomenon of co-channel interference in the network is very serious, affecting network capacity

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  • Spectrum Resource Allocation Method Based on Topology Control in Cognitive Radio Networks
  • Spectrum Resource Allocation Method Based on Topology Control in Cognitive Radio Networks
  • Spectrum Resource Allocation Method Based on Topology Control in Cognitive Radio Networks

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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 present invention provides a spectrum resource allocation method based on topology control in a cognitive radio network, including: a static allocation method with a long execution period, the static allocation method includes: an approximate algorithm for finding a spanning tree with the smallest maximum node degree, Allocate frequency bands to links in the network according to the spanning tree; an allocation algorithm for allocating additional frequency bands to the minimum cut set related to nodes; a dynamic allocation algorithm with a short execution cycle, the dynamic allocation algorithm includes: obtaining the current network flow distribution ; Change the frequency band allocation structure according to the distribution to meet the current communication needs. The method provided by the invention can improve the robustness and capacity of the secondary user network, has low computational complexity, and optimizes the 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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Patent Type & Authority Patents(China)
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 JIAOTONG UNIV
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