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A Spectrum Sensing Method

A spectrum sensing and spectrum technology, applied in the field of spectrum sensing, can solve problems such as large coordination overhead, achieve the effects of reducing impact, reducing average false detection probability and interference to primary users, reducing complexity and coordination overhead

Inactive Publication Date: 2011-12-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that large coordination overhead will be generated through network-wide coordination or clustering coordination in the existing distributed cognitive wireless network spectrum sensing, and proposes a spectrum sensing method

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Embodiment Construction

[0027] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0028] In a distributed network, since the communication relationship between each user node is equal, and the nodes are an incomplete mesh structure, each node can adopt a distributed cooperative channel sensing method, which can save the selection The extra overhead brought by the cluster head node’s cluster sensing, and considering that in the distributed cognitive wireless network communication, when the wireless coverage of each node is similar, the spectrum usage of a node will only affect the two nodes. other nodes within the hop range, so the sensing range of a node only needs to be limited to the frequency band used by its two-hop neighbors.

[0029] The present invention proposes a method for detecting whether a channel is occupied by a primary user through energy detection and cooperative sensing between two-hop neighbors of a secon...

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Abstract

The invention discloses a frequency spectrum sensing method. The frequency spectrum sensing method comprises the following steps of: independently sensing minor user nodes in an energy detecting mode, and acquiring the use conditions of frequency spectrums of the peripheries of the minor user nodes; acquiring a latest detection result by diffusing the minor user nodes within a two-hop neighbour range; computing the local sensing information and the synergetic sensing information of the minor user nodes; acquiring a judgment threshold according to master user communication behavior priori knowledges and the synergetic sensing information, and judging. According to the frequency spectrum sensing method disclosed by the invention, special appointed sink nodes or clustering computation is notneeded, the local sensing information diffusion of the minor user nodes is limited within the two-hop neighbour range, and the complexity and the synergetic spending of the synergetic detection of a distributed cognitive network are effectively reduced.

Description

technical field [0001] The invention belongs to the field of cognitive radio technology, and in particular relates to a spectrum sensing method. Background technique [0002] With the rapid development of wireless technology, spectrum resources are becoming increasingly scarce. Research has found that the main reason for the current shortage of spectrum resources is that the traditional fixed spectrum allocation method makes the utilization rate of most authorized frequency bands too low, resulting in a great waste of spectrum resources. . In order to improve spectrum utilization and alleviate the problem of spectrum scarcity, various dynamic spectrum access technologies have emerged as the times require. Among them, cognitive radio is considered to be one of the most potential technologies. The basic idea of ​​cognitive radio is: when the frequency band allocated to the primary user (Primary User) is not used, the secondary user (Secondary user) can opportunistically acce...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B17/382
Inventor 张科李维昌毛玉明冷甦鹏
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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