Opportunistic spectrum access with spectrum heterogeneity in cognitive networks

Miao Yang*, Jianping An

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

We study the problem of dynamic spectrum sensing and access in cognitive radio networks. A distributed C-MAC (cognitive media access control) protocol is proposed. And based on the theory of the partially observable Markov decision process, a greedy opportunistic spectrum access scheme that maximizes the current reward of secondary users is proposed considering spectrum heterogeneity of secondary users. Numerical results are provided to show the performance characters and good profit of the proposed scheme in cognitive networks. It is show that the performance is influenced by the heterogeneity greatly when the available channels are scarce. Along with the number of common channels increasing, the proposed scheme gets a good performance.

Original languageEnglish
Title of host publication7th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2011
DOIs
Publication statusPublished - 2011
Event7th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2011 - Wuhan, China
Duration: 23 Sept 201125 Sept 2011

Publication series

Name7th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2011

Conference

Conference7th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2011
Country/TerritoryChina
CityWuhan
Period23/09/1125/09/11

Keywords

  • Cognitive MAC
  • Opportunistic spectrum access
  • Partially observable Markov decision process (POMDP)
  • Spectrum heterogeneity

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