Title :
Downlink Packet Scheduling for Real-Time Traffic in Multi-User OFDMA System
Author :
Xiantao, Liu ; Guangyi, Liu ; Ying, Wang ; Ping, Zhang
Author_Institution :
WTI Inst., Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
Orthogonal frequency division multiplexing access (OFDMA) which can make full use of frequency resources by using adaptive modulation and coding (AMC) and multi-user diversity, is a promising technology for the next generation wireless communication system. The flexibility of OFDMA also makes the radio resource management (RRM) more complicated. This paper proposes a modified largest weighted delay first (M-LWDF) packet scheduling algorithm with subcarrier allocation for the real time service in the multiuser OFDMA systems. The simulation result shows that it can maximize the system throughput and guarantee the QoS (quality of service) of different users.
Keywords :
OFDM modulation; adaptive codes; adaptive modulation; quality of service; radio networks; scheduling; telecommunication traffic; QoS; adaptive modulation and coding; downlink packet scheduling; frequency resources; modified largest weighted delay first; multi-user OFDMA system; multi-user diversity; next generation wireless communication system; orthogonal frequency division multiplexing access; quality of service; radio resource management; real-time traffic; Delay effects; Downlink; Frequency diversity; Modulation coding; OFDM; Quality of service; Real time systems; Resource management; Scheduling algorithm; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
DOI :
10.1109/VTCF.2006.278
