Dynamic Spectrum Access Strategies in the Cognitive Radio Network Based on the Discrete TV band
[1]LU Yan-hui,ZHANG Shuai,MU Xiao-min,et al.Dynamic Spectrum Access Strategies in the Cognitive Radio Network Based on the Discrete TV band[J].Journal of Zhengzhou University (Engineering Science),2015,36(01):93-96.[doi:10.3969/ j.issn.1671 -6833.2015.01. 022]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
36卷
Number of periods:
2015 01
Page number:
93-96
Column:
Public date:
2015-01-10
- Title:
- Dynamic Spectrum Access Strategies in the Cognitive Radio Network Based on the Discrete TV band
- Keywords:
- cognitive radio; Markov process; spectrum fragment ; spectrum access strategy ; outage probabili-ty
- CLC:
- TN943
- DOI:
- 10.3969/ j.issn.1671 -6833.2015.01. 022
- Abstract:
- The unused TV bands are discretized by the behaviors of the random presence of the incumbents,considered as primary users in the cognitive radio network. The spectrum discreteness is ignored by most of theexisting strategies,resulting in a mass of spectrum fragments that cannot afford the user’s demand. In the pa-per,the primary users are modeled as a Markov process,and the spectrum occupancy degree,fragments de-gree and the statistical average outage probability are defined to analyze the impact of the primary users on sys-tem performance. And two strategies are proposed in this paper. The first strategy involves adjustment factorand selects the fewer continuous channels. The second strategy based on the k-agile receiver involves the con-straint of agility and guard bands,and selects the minimum non-contiguous fragments to solve the fragmentsproblem in the physical layer. The simulations show that both strategies are superior to the existing strategies.
- References:
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