Adaptive QoS-aware channel access scheme for Cognitive Radio networks

作者：Zhang, Li^*; Zheng, Guoxin

来源：International Journal of Ad Hoc and Ubiquitous Computing, 2010, 6(3): 172-182.

DOI：10.1504/IJAHUC.2010.034970

• adaptive channel access
• buffer space
• queue length
• CR
• cognitive radio
• media access

This paper proposes a three-dimensional traffic model, which can identify and utilise those under-utilised channel opportunities efficiently. Based on this model, an opportunistic channel access scheme, named Adaptive Opportunistic Channel Access (AOCA) schedule algorithm, is presented. It can adaptively schedule channel sensing leveraging the Media Access Control (MAC) layer decisions and maximise channel utilisation without imposing any additional burden on CUs and extra interference on licensed users. Moreover, it can provide cognitive users with Quality of Service (QoS) support. Finally, the simulation results demonstrate that the proposed channel schedule scheme can utilise the channel effectively and flexibly in CR networks.

• 出版日期2010
• 单位上海大学