CR-MEGA: Mutually Exclusive Guaranteed Access Control for Cognitive Radio Networks

In Cognitive Radio (CR) networks, unlicensed Sec-ondary Users (SUs) can occupy the white spaces of spectrum channels when licensed Primary Users (PUs) do not use them. Hence, for the operation of CR networks, it is critical to coordinate spectrum accesses of SUs and protect the ongoing communication of PUs. In this paper, we propose a new medium access control protocol for SUs, called Mutually Exclusive Guar-anteed Access for Cognitive Radio networks (CR-MEGA). CR-MEGA adopts a dual sensing approach (i.e., carrier sensing and spectrum sensing) to avoid packet collisions with faraway PUs as well as nearby SUs. Our scheme performs well even in the harsh condition with highly active PUs, but the advantage comes with the increased sensing delay. We analyze the throughput and delay of CR-MEGA using the Markov chain model, and investigate the impacts of various parameters with numerical results.

@article{Shafiq2018,
  title     = {CR-MEGA: Mutually Exclusive Guaranteed Access Control for Cognitive Radio Networks},
  journal   = {International Journal of Advanced Computer Science and Applications},
  volume    = {9},
  number    = {1},
  year      = {2018},
  publisher = {The Science and Information Organization},
  author    = {Muhammad Shafiq and Seonghun Son and Jin-Ghoo Choi and Heejung Yu},
  doi       = {10.14569/SpecialIssue.2018.090110},
  url       = {https://doi.org/10.14569/SpecialIssue.2018.090110}
}