Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (5): 17-21,29.doi: 10.3969/j.issn.1000-565X.2015.05.003

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

A New Random Spectrum Access Scheme Based on Cross-Layer Modeling

Zhang Min Li Bin   

  1. School of Electronic and Information Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China
  • Received:2014-12-08 Revised:2015-01-16 Online:2015-05-25 Published:2015-05-07
  • Contact: 张敏(1983-)，女，博士后，讲师，主要从事认知无线电网络、无线资源分配算法研究． E-mail:aries.zm@gmail.com
  • About author:张敏(1983-)，女，博士后，讲师，主要从事认知无线电网络、无线资源分配算法研究．
  • Supported by:
    Supported by the National Natural Science Foundation of China(61301300)

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Abstract: In view of different operation mechanisms of call level and packet level，a cross-layer Markov model is established to describe the relationship between call level and packet level，the formulas of call blocking probability and packet delay for secondary users are derived，and a new random spectrum access (RSA) scheme on the basis of cross-layer model is proposed． Furthermore，a system level simulation is conducted for cognitive radio networks．Simulated results show that the proposed model helps evaluate the performance of cognitive radio networks accurate-ly，and that the random spectrum access scheme can guarantee the performance of both the call level and the packet level for secondary users．

Key words: cognitive radio, random spectrum access, cross-layer modelling