標題: QoS-aware link rate adaptation in IEEE 802.16 Broadband Wireless Access systems
作者: Yu, Yu-Ting
Chao, Hsi-Lu
資訊工程學系
Department of Computer Science
公開日期: 2007
摘要: IEEE 802.16 Broadband Wireless Access system (BWA) is a promising emerging technology. In the IEEE 802.16 standard, multiple data transmission rates are defined by employing different modulation and channel coding schemes. How to select a proper mode affects the system performance significantly. In this paper, an efficient link rate adaptation algorithm, named QoS-aware Link Rate Adaptation (Q-LRA), is proposed. Q-LRA takes both QoS demand and channel condition into consideration to determine the best mode. The QoS demand of a connection is represented as packet error rate (PER). Based on the specified PER, the BS calculates the required signal-to-noise ratio (SNR) threshold of each mode. By comparing the measured SNR and all modes' SNR thresholds, the BS suggests the SS the best mode. The performance of Q-LRA is evaluated by simulations. The simulation results show that Q-LRA improves system throughput and guarantees each connection's QoS demand.
URI: http://hdl.handle.net/11536/10888
ISBN: 978-1-4244-1143-6
期刊: 2007 IEEE 18TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1-9
起始頁: 2374
結束頁: 2378
顯示於類別:會議論文