AuthorsS. Maharjan, J. Xiang, Y. Zhang and S. Gjessing
TitleDelay Reduction for Real Time Services in IEEE 802.22 Wireless Regional Area Network
AfilliationNetworks, Communication Systems
Publication TypeProceedings, refereed
Year of Publication2010
Conference NameThe 21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2010)
Date PublishedSeptember 2010
ISBN Number978-1-4244-8017-3

Real time traffic such as voice and video have strict requirements on the acceptable end-to-end packet delay. When there are different types of traffic with different requirements on tolerable latency, priority based packet scheduling schemes are normally used in order to reduce the queuing delay for real time services. However, in cognitive radio networks, the time that the system spends on spectrum sensing adds further delay to the packet transmission. In this paper, we propose a new scheme to significantly reduce the overall packet delay, including the delay due to sensing for real time services in cognitive radio networks. We derive the expression for average packet delay for the proposed scheme and the simulation results match well with the analytical results. The numerical results show that the priority based scheduling scheme combined with our scheme substantially reduces the packet delay for real time applications.

Citation KeySimula.simula.524