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An Energy Efficient Cooperative Spectrum Sensing Method

A collaborative spectrum sensing, energy-efficient technology, applied in energy reduction, network planning, transmission systems, etc., can solve problems such as unconsidered sample signals, and achieve the effects of saving sensing energy, improving sensing reliability, and saving transmission energy

Inactive Publication Date: 2018-06-05
HOHAI UNIV CHANGZHOU
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Problems solved by technology

This scheme mainly sets an energy-effective spectrum sensing method from the perspective of saving spectrum sensing time, and this method does not consider the energy loss caused by continuous sensing of sample signals with energy values ​​​​between the double thresholds

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  • An Energy Efficient Cooperative Spectrum Sensing Method
  • An Energy Efficient Cooperative Spectrum Sensing Method
  • An Energy Efficient Cooperative Spectrum Sensing Method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] The spectrum sensing system model of the present invention is as figure 1 As shown, in the cognitive wireless network coexisting with the primary user network, N cognitive users CRi detect the idle frequency spectrum of the primary user PU. In the collaborative spectrum sensing process, it is set that the main user signal is first transmitted from the main user to the cognitive user in one direction, and then the detection result is broadcast by the cognitive user to the fusion center SU 1 , and the fusion judgment is performed by the fusion center to obtain the final judgment result.

[0025] Such as figure 2 As shown, a time slot of spectrum sensing is divided into: a primary user detection phase and a detection result reporting phase. Define the state of the primary user in the kth time slot as H p (k), where H p (k)=H 1 Indicates that the primary user...

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Abstract

The invention discloses an energy-efficient cooperative spectrum sensing method. Dual energy thresholds are arranged in the spectrum sensing method, and the number of perceiving users participating in sensing is saved through two rounds of screening. Firstly, N perceiving users perform sensing anticipation on a main user, then M users of which the energy values are out of the two thresholds are selected to perform sensing continuously, and the rest N-M perceiving users enter the dormancy state so as to save sensing energy consumption. In the second phase, S perceiving users of which the cumulative energy values are less than the first threshold are selected and sensing results are transmitted to a fusion center without a common control channel. The rest M-S perceiving users enter the dormancy state, and the fusion center tacitly approves that the sensing results of the M-S perceiving units are that the main user exists. Sensing energy consumption of the system is saved by the method of reducing the number of the users participating in sensing under the condition of ensuring spectrum sensing performance.

Description

technical field [0001] The invention relates to an energy efficient cooperative spectrum sensing method, which belongs to the technical field of cognitive radio. Background technique [0002] With the development of radio services, the available spectrum resources are increasingly scarce, and the low spectrum utilization rate is exacerbating this situation. As a key technology for the development of next-generation networks, cognitive radio effectively solves the problem of shortage of wireless spectrum resources. Cognitive radio interacts with its surrounding environment and understands and learns, and adaptively adjusts wireless operating parameters such as power, coding, and carrier modulation according to changes in the surrounding environment, thereby improving communication performance and spectrum utilization. [0003] Spectrum sensing is the key and prerequisite for the realization of cognitive radio. Its purpose is to accurately and quickly perceive as many spectru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04B17/382
CPCH04W16/14Y02D30/70
Inventor 高远谢秀坤朱昌平姚澄汤一彬单鸣雷
Owner HOHAI UNIV CHANGZHOU
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