Performance analysis of opportunistic CSMA schemes in cognitive radio networks

Bang Chul Jung, Woongsup Lee

Research output: Contribution to journalArticlepeer-review


In this paper, we consider underlay cognitive radio (CR) networks where an amount of interference caused by secondary stations (STAs) has to be kept below a predefined level, which is called interference temperature. We propose opportunisticp-persistent carrier sense multiple access schemes for the CR networks, which opportunistically exploit wireless channel conditions in transmitting data to the secondary access point. We also devise an adaptive interference-level control technique to further improve quality-of-service of a primary network by limiting the excessive interference due to collisions among STAs. The performances of the proposed schemes are mathematically analyzed, and they are validated with extensive computer simulations. The simulation results show that the proposed schemes achieve near optimal throughput of the secondary network while they are backward-compatible to the conventional p-persistent CSMA scheme.

Original languageEnglish
Pages (from-to)833-845
Number of pages13
JournalWireless Networks
Issue number3
Publication statusPublished - 2018 Apr 1

Bibliographical note

Funding Information:
This research was supported in part by the National GNSS Research Center program of Defense Acquisition Program Administration and Agency for Defense Development and by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2015R1D1A1A01057529).

Publisher Copyright:
© 2016, Springer Science+Business Media New York.

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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