Title :
Comparison of OFDMA Resource Scheduling Strategies with Fair Allocation of Capacity
Author :
Einhaus, M. ; Klein, O. ; Walke, B.
Author_Institution :
RWTH Aachen Univ., Aachen
Abstract :
Orthogonal frequency division multiple access (OFDMA) provides possibilities to exploit diversity of a frequency selective fading channel by appropriate resource scheduling strategies. This paper presents the performance comparison of different strategies with fair allocation of transmission capacity in a typical multiuser scenario. The analyzed performance metrics comprise both throughput and delay, which are required for a comprehensive analysis regarding quality of service (QoS). The evaluation has been conducted by means of stochastic event-driven simulations of a WiMAX based OFDMA system. Therefore, the developed simulation tool provides a detailed implementation of both medium access control (MAC) and physical layer (PHY). The presented results clarify the significant impact of different scheduling strategies on the tradeoff between throughput and delay.
Keywords :
OFDM modulation; WiMax; access protocols; discrete event simulation; fading channels; multiuser channels; performance evaluation; quality of service; resource allocation; scheduling; stochastic processes; OFDMA resource scheduling strategy; fair capacity allocation; frequency selective fading channel; medium access control; multiuser channel; network delay; network throughput; orthogonal frequency division multiple access; performance metrics; quality of service; stochastic event-driven simulation tool; Delay; Fading; Frequency conversion; Frequency diversity; Measurement; Performance analysis; Physical layer; Quality of service; Resource management; Throughput;
Conference_Titel :
Consumer Communications and Networking Conference, 2008. CCNC 2008. 5th IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1456-7
Electronic_ISBN :
978-1-4244-1457-4
DOI :
10.1109/ccnc08.2007.97
