Summary
International Technical Conference on Circuits/Systems, Computers and Communications
2008
Session Number:P1
Session:
Number:P1-99
A Packet Scheduling Algorithm based on the Estimation of Packet Loss Amount for Supporting Real-Time Traffic in IEEE 802.22 WRAN Systems
Youngdu Lee, Insoo Koo,
pp.-
Publication Date:2008/7/7
Online ISSN:2188-5079
Summary:
In this paper, we propose and evaluate a new packet scheduling algorithm in order to support real-time traffic more effectively in IEEE 802.22 WRAN system where Quiet Period (QP) frame exists per superframe. During QP frame, BS and CPEs stop data transmission, and scan TV channels used by themselves to perform in-band measurements of incumbent users. It will cause packet delay as long as the length of QP, and degrade quality of service of traffic time traffic. The proposed scheme utilizes not only the delay of Head of Line(HOL) packets in buffer of each user but also the amount of expected loss packets in next frame when a service will not be given in current frame. The performances of the proposed scheme are compared with those of PLFS and M-LWDF in terms of average packet loss rate and throughput. The simulation results show that the proposed scheduling algorithm performs much better than the PLFS and M-LWDF algorithms.