Novel channel-hopping schemes for cognitive radio networks

Guey Yun Chang, Wen Hung Teng, Hao Yu Chen, Jang Ping Sheu

Research output: Contribution to journalArticlepeer-review

82 Scopus citations


Recently, cognitive radio (CR) has become a key technology for addressing spectrum scarcity. In CR networks, spectrum access should not interfere the colocate incumbent networks. Due to the requirement above, common control channel approaches, which are widely used in traditional multichannel environments, may face serious CR long-time blocking problem and control channel saturation problem. Although channel-hopping-based approaches can avoid these two problems, existing works still have significant drawbacks including long time-to-rendezvous, unbalance channel loading, and low channel utilization. In this paper, we introduce three channel-hopping approaches, RCCH, ARCH, and SARCH for synchronous and asynchronous environments, respectively. Compared with previous works, our schemes outperform the state of the art in terms of these metrics.

Original languageEnglish
Article number6392171
Pages (from-to)407-421
Number of pages15
JournalIEEE Transactions on Mobile Computing
Issue number2
StatePublished - Feb 2014


  • Ad hoc networks
  • Channel-hopping
  • Cognitive radio
  • Medium access control


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