標題: | A Downlink Mapping Algorithm for Two-Level Requests in IEEE 802.16e Systems under AMC Mode |
作者: | Yang, Zi-Yang Kuo, Yaw-Wen Lee, Tsern-Huei 傳播研究所 Institute of Communication Studies |
關鍵字: | OFDMA;IEEE 802.16e;Burst mapping;AMC |
公開日期: | 2013 |
摘要: | This paper proposes a downlink mapping algorithm for two-level requests in Orthogonal Frequency Division Multiple Access based IEEE 802.16e systems under the Adaptive Modulation and Coding (AMC) mode by which the modulation and coding scheme (MCS) of a user may be different for available subchannels. Given a set of requests each with two priorities, the proposed algorithm efficiently allocates a two-dimensional (time and frequency) burst with a suitable MCS to each user to maximize the system throughput with service differentiation. Simulation results show that the proposed algorithm outperforms the Efficient Downlink Mapping Allocation (EDMA) algorithm [5] in terms of the throughput of high priority data, but slightly sacrifice in overall throughput. The proposed algorithm can improve up to 98.8% more the average allocated ratio of urgent data than the EDMA. |
URI: | http://hdl.handle.net/11536/24371 |
ISBN: | 978-1-4799-2825-5; 978-1-4799-2827-9 |
ISSN: | 2159-3442 |
期刊: | 2013 IEEE INTERNATIONAL CONFERENCE OF IEEE REGION 10 (TENCON) |
顯示於類別: | 會議論文 |