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Frequency spectrum sensing method, device and equipment of frequency spectrum sharing system

A technology of spectrum sensing and spectrum sharing, which is applied in the transmission system, spectrum gap assessment, transmission monitoring, etc., can solve problems such as shadows, interference from spectrum sensing uncertainty, weak main signal, etc., to improve sensing performance and reduce frequency selection The effect of sexual decline

Active Publication Date: 2013-07-24
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
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Problems solved by technology

[0003] However, in the real spectrum sharing system environment, since the main signal is often weak, spectrum sensing is always affected by uncertain interference, channel attenuation, shadows, etc.

Method used

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  • Frequency spectrum sensing method, device and equipment of frequency spectrum sharing system
  • Frequency spectrum sensing method, device and equipment of frequency spectrum sharing system
  • Frequency spectrum sensing method, device and equipment of frequency spectrum sharing system

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Embodiment Construction

[0053] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0054] The embodiments of the present invention are implemented based on a spectrum sharing system. For the sake of description, a system regulated by the IEEE802.22 standard is taken as an example. There are various spectrum sharing systems, and all of them can be applied to the present invention. The above settings are only illustrative.

[0055] According to the present invention, cooperative sensing utilizes multi-user diversity to obtain better spectrum sensing performance. A schematic flow chart of a cooperative sensing solution using multi-user diversity according to an embodiment of the present invention is as follows figure 2 As shown, in this embodiment, preferably, the base station serves as the spectrum sensing management center and the spectrum sensing fusion center, and the terminal user equipment serves as the local sensing node. Howe...

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Abstract

A method, device and apparatus for spectrum sensing in spectrum sharing system are provided by the embodiments of the present invention. Spectrum sensing energy detection of the present invention is implemented in frequency domain, and the whole frequency band is divided into multiple sub-bands, an energy-level of each sub-band is measured by the local cognitive node and the energy-level of each sub-band is returned to an aggregation centre. For each sub-band, in all the cognitive nodes, a sub-band energy-level of the maximum energy-level is selected as the global energy-level of the sub-band by the fusion centre, the global energy-level of the whole frequency band is achieved by averaging all maximums of sub-band energy-level. With the cooperative sensing method of the present invention, more local sensing information are transmitted to the aggregation centre, and the maximum energy-level of each sub-band is selected from all the cooperative cognitive nodes, deep selective fading sub-band energy-level does not contribute to the global energy-level. By this way, it could obtain multi-user diversity, reduce frequency selective fading and improve sensing performance.

Description

technical field [0001] The present invention relates to communication technology, and in particular to a spectrum sensing method, device and equipment of a spectrum sharing system. Background technique [0002] In the spectrum sharing system under the licensed spectrum, the master system and the slave system share a certain spectrum resource. When the master system does not occupy this spectrum resource, the slave system can use this idle resource opportunistically. The main system has privileged use of the spectrum and can access it at any time. The slave system uses the spectrum opportunistically. When the master system uses the spectrum, the slave system needs to avoid it. In order to avoid harmful interference to the primary system, the secondary system must periodically detect the existence status of the primary system, that is, the secondary system should periodically sense whether spectrum resources are available. If the primary system does not occupy the spectrum r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/00H04W24/00
CPCH04W16/14H04L27/0006
Inventor 杨峰邱吉刚徐斌阳
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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