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Frequency spectrum sensing method applicable to markov service model

A Markov service and spectrum sensing technology, which is applied in the field of spectrum sensing and can solve the problem of not considering the service correlation of the main user.

Inactive Publication Date: 2012-03-21
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, many implementation methods in spectrum sensing do not take into account the correlation of primary user traffic

Method used

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  • Frequency spectrum sensing method applicable to markov service model
  • Frequency spectrum sensing method applicable to markov service model
  • Frequency spectrum sensing method applicable to markov service model

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Embodiment Construction

[0039] The following is a detailed description of a spectrum sensing method suitable for Markov service models proposed by the present invention with reference to the drawings and embodiments.

[0040] The embodiment of the present invention proposes a spectrum sensing method with first-order Markov characteristics based on primary user services. Since the main user service has first-order Markov characteristics, such as image 3 As shown, therefore, there is a correlation between the status of the primary user in the adjacent sensing period, and if this correlation can be fully utilized, the spectrum sensing reliability of the cognitive device can be effectively improved.

[0041] The spectrum sensing method consists of three steps, such as figure 1 As shown, they can be summarized as:

[0042] S1. The cognitive device uses a spectrum sensing technology to perform spectrum sensing on the state of its primary user, and obtain the preliminary sensing result of the state of the primary...

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Abstract

The invention relates to the technical field of wireless communication and discloses a frequency spectrum sensing method applicable to a markov service model. The frequency spectrum sensing method comprises the following steps of: S1, carrying out frequency spectrum sensing on a main user state by cognitive equipment by utilizing a frequency spectrum sensing technology, so as to obtain a primary sensing result of the current sensing period to the main user state; S2, carrying out statistics on the main user states of the first N sensing periods by the cognitive equipment, wherein N is a positive integer; and analysing the statistic result to obtain a statistical probability value; and S3, obtaining a final sensing result by the cognitive equipment according to the primary sensing result obtained in the step S1 and the statistic probability value obtained in the step S2. The frequency spectrum sensing method disclosed by the invention enhances reliability of frequency spectrum sensing of the cognitive equipment and has strong practicability.

Description

Technical field [0001] The present invention relates to the field of wireless communication technology, in particular to a spectrum sensing method suitable for Markov business models. Background technique [0002] With the continuous development of modern wireless communication technologies, more and more spectrum resources are required to support various multimedia services with rich content. However, under the current spectrum resource planning policy, a certain portion of spectrum resources is exclusively allocated to a specific service or operator, and no unauthorized users are allowed to use it. A survey result from the Federal Communications Commission of the United States shows that there are currently a large number of free or underutilized spectrum resources, both in time and space. Under such background conditions, people are paying more and more attention to how to make full use of these unused or underutilized spectrum resources, which are commonly referred to as spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B17/345
Inventor 王莹张平纪鹏李根聂高峰林文轩徐明月
Owner BEIJING UNIV OF POSTS & TELECOMM