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Spectrum sensing method for cognitive radio network on basis of secondary user spectrum requirements

A cognitive radio and secondary user technology, which is applied in the field of spectrum sensing, can solve the problems that data packets have survival time and do not consider the real-time information

Inactive Publication Date: 2015-04-08
HOHAI UNIV CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] 3. Data packets have a time to live
Most articles do not consider the real-time nature of information

Method used

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  • Spectrum sensing method for cognitive radio network on basis of secondary user spectrum requirements
  • Spectrum sensing method for cognitive radio network on basis of secondary user spectrum requirements
  • Spectrum sensing method for cognitive radio network on basis of secondary user spectrum requirements

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the drawings.

[0045] In order to achieve the above objective, the present invention provides a distributed spectrum sensing method for a cognitive radio network based on the spectrum requirements of secondary users.

[0046] Such as figure 1 As shown, the architecture of the cognitive radio network based on the spectrum requirements of secondary users used in the present invention includes two types of entities: primary users and secondary users. The primary user has the priority to use the authorized spectrum. Only when the licensed spectrum in the cognitive radio network is not occupied by the primary user, can the secondary users use the licensed spectrum for data transmission. Therefore, secondary users must perform spectrum sensing to obtain free spectrum information that can be used, so that the authorized spectrum can be used opportunistically without interfering with the normal transmission...

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Abstract

The invention relates to a spectrum sensing method for a cognitive radio network on the basis of secondary user spectrum requirements. The spectrum sensing method comprises three stages, wherein in the calculating stage, a cognition starting user calculates a communication number of the cognition starting user and acquires communication numbers of other cognition starting users in the communication radius range of the cognition starting user; in the selecting stage, descending sorting is carried out on the cognition starting user and other cognition starting users in the communication radius range of the cognition starting user according to the communication numbers so as to form an ordered set and a candidate sensing user is selected from the ordered set; in the verifying stage, whether the selected candidate sensing user can meet real-time performance of sensing information is verified. According to the spectrum sensing method, equipment cost of secondary users in the cognitive radio network is effectively reduced, complexity of equipment of the secondary users and energy consumption generated when the secondary users carry out spectrum sensing are reduced and moreover, the real-time problem of the spectrum-sensed information is considered.

Description

Technical field [0001] The present invention belongs to the field of cognitive radio networks. Specifically, the present invention relates to a spectrum sensing method of a cognitive radio network based on the spectrum requirements of secondary users, in which some secondary users are selected as sensing users for spectrum sensing among cognitive radio users. Background technique [0002] With the rapid deployment of new radio equipment and applications, communications on unlicensed frequency bands are becoming more and more crowded. However, due to the fixed spectrum allocation policy, a large part of the licensed spectrum is unused. The inefficient use of licensed spectrum resources and the communication congestion of unlicensed spectrum have prompted spectrum regulators to re-examine their spectrum allocation policies and begin to seek an innovative solution. The concept of cognitive radio is proposed to solve this problem of spectrum utilization efficiency. The cognitive ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/382
Inventor 韩光洁李傲寒
Owner HOHAI UNIV CHANGZHOU
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