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Cooperative spectrum sensing method capable of saving cost on network communication

A technology for network communication and cooperative spectrum, applied in energy-saving ICT, transmission monitoring, electrical components, etc.

Inactive Publication Date: 2010-07-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the unnecessary communication overhead and energy consumption problems introduced by cooperative spectrum sensing in cognitive radio networks, the present invention provides a cooperative spectrum sensing method based on cognitive radio user confidence to reduce energy consumption of sensing nodes and reduce network communication overhead

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  • Cooperative spectrum sensing method capable of saving cost on network communication
  • Cooperative spectrum sensing method capable of saving cost on network communication
  • Cooperative spectrum sensing method capable of saving cost on network communication

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Embodiment Construction

[0056] The implementation process of the cooperative spectrum sensing method proposed by the present invention, which saves sensing node energy and network communication overhead, is further described below in conjunction with the accompanying drawings, taking a specific implementation under an additive white Gaussian channel as an example.

[0057] Specific scenarios such as figure 1 As shown, the cognitive radio network is composed of a data fusion center 2 and K cognitive radio users 1, and the primary user 3 signals received by each cognitive radio user 1 are independent of each other. In the channel perceived by cognitive radio user 1, the noise coincides with a mean of 0 and a variance of δ i 2 Gaussian distribution of , where i represents the i-th cognitive radio user, 1≤i≤K. The data fusion center and each cognitive radio user exchange messages through the control channel.

[0058] The specific implementation of the cooperative spectrum sensing method of the present...

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Abstract

The invention relates to a cooperative spectrum sensing method capable of saving cost on network communication. The prior network communication has the defect of high cost. The method comprises the following steps: a cognitive radio user uses an energy detection technique to sense the spectrum of a target frequency range, thereby obtaining a local sensing result; a data fusion center collects andfuses the local sensing results of the cognitive radio users, and makes a judgment on the spectrum service conditions, thereby obtaining a cooperative sensing judgment result; and the data fusion center and the cognitive radio users communicate messages through a control channel, each cognitive radio user transmits the local spectrum sensing result, and the data fusion center transmits the cooperative sensing judgment result. On the premise of not reducing the cooperative sensing accuracy, the method of the invention reduces the cost on cognitive radio network communication. For the cognitiveradio users, the method reduces the transmission of unnecessary sensing results, saves the valuable energy and prolongs the service lives of batteries.

Description

technical field [0001] The present invention belongs to the field of cognitive radio. In particular, it relates to a cooperative spectrum sensing method that utilizes the confidence of cognitive radio users in a cognitive radio network to reduce energy consumption of sensing nodes and reduce network communication overhead. Background technique [0002] Cognitive radio technology can effectively use spectrum resources and alleviate the current shortage of wireless resources, so it has become a research hotspot and has received extensive attention. Cognitive radio technology requires radio users to have cognitive functions. By sensing the spectrum usage in the surrounding environment, they can find available spectrum holes, and use these spectrum holes for transmission without affecting the communication of the primary user. [0003] Spectrum sensing is the primary link in the realization of cognitive radio technology, and the quality of sensing performance will affect the pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B1/707H04B17/382
CPCY02B60/50
Inventor 陈惠芳谢磊吴伟金煦
Owner ZHEJIANG UNIV
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