Distributed channel access schemes for multi-channel ALOHA cognitive radio networks

Chang Shen Lee, Wei Ho Chung, Ta-Sung Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, the distributed channel access schemes for ALOHA-based cognitive radio networks are considered. In the considered system, time is divided into frames, which are further divided into sensing phase and transmission phase. We derive channel sensing policy in the sensing phase, and channel access policy in the transmission phase for a secondary user (SU) to maximize its throughput. To mitigate high complexities of the above scheme, we propose a threshold-based channel access scheme. In this scheme, an appropriate threshold is set based on channel occupancy information and channel state information, and only channels providing potentially high throughput will be sensed and accessed. The proposed schemes are fully distributed, i.e., no extra information exchange is needed among SUs, which is a highly desired and beneficial property. Simulation results confirm that the proposed schemes outperform prior random access schemes.

Original languageEnglish
Title of host publication2015 IEEE Wireless Communications and Networking Conference, WCNC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1124-1128
Number of pages5
ISBN (Electronic)9781479984060
DOIs
StatePublished - 17 Jun 2015
Event2015 IEEE Wireless Communications and Networking Conference, WCNC 2015 - New Orleans, United States
Duration: 9 Mar 201512 Mar 2015

Publication series

Name2015 IEEE Wireless Communications and Networking Conference, WCNC 2015

Conference

Conference2015 IEEE Wireless Communications and Networking Conference, WCNC 2015
CountryUnited States
CityNew Orleans
Period9/03/1512/03/15

Keywords

  • Cognitive radio
  • opportunistic spectrum access
  • throughput maximization

Fingerprint Dive into the research topics of 'Distributed channel access schemes for multi-channel ALOHA cognitive radio networks'. Together they form a unique fingerprint.

  • Cite this

    Lee, C. S., Chung, W. H., & Lee, T-S. (2015). Distributed channel access schemes for multi-channel ALOHA cognitive radio networks. In 2015 IEEE Wireless Communications and Networking Conference, WCNC 2015 (pp. 1124-1128). [7127627] (2015 IEEE Wireless Communications and Networking Conference, WCNC 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WCNC.2015.7127627