DocumentCode :
2160820
Title :
Frequency-time scheduling algorithm for OFDMA systems
Author :
Almatarneh, Rabie ; Ahmed, Mohamed ; Dobre, Octavia
Author_Institution :
Fac. of Eng. & Appl. Sci., Memorial Univ. of Newfoundland & Labrador, St. John´´s, NL
fYear :
2009
fDate :
3-6 May 2009
Firstpage :
766
Lastpage :
771
Abstract :
Frequency-time scheduling is an essential radio resource management (RRM) function in Orthogonal Frequency Division Multiple Access (OFDMA) wireless systems. In the literature, there are several OFDMA scheduling algorithms such as the Hungarian and Max-Max algorithm. However, such algorithms do not consider the multiuser diversity into account. In this paper, we propose a scheduling algorithm that exploits the multiuser diversity in both time and frequency domains. Also, the proposed algorithm utilizes the Proportional Fairness (PF) criterion to achieve fairness among users in the system. In order to support multimedia bursty traffic, our algorithm allows more than one user to share a subband in each time frame. The proposed algorithm iteratively assigns the available subbands to be shared among different users concurrently. We compare the performance of the proposed algorithm with other OFDMA scheduling algorithms in the literature. Results show that the proposed algorithm outperforms other algorithms in terms of the throughput with comparable fairness performance.
Keywords :
OFDM modulation; diversity reception; frequency division multiple access; iterative methods; multimedia communication; scheduling; telecommunication network management; telecommunication traffic; time-frequency analysis; OFDMA wireless system; frequency-time scheduling algorithm; iterative method; multimedia bursty traffic; multiuser diversity; orthogonal frequency division multiple access; proportional fairness criterion; radio resource management; Channel state information; Dynamic scheduling; Frequency conversion; Frequency domain analysis; Iterative algorithms; Modulation coding; OFDM; Processor scheduling; Scheduling algorithm; Throughput; Adaptive modulation and coding; Channel state information; Jain´s fairness index; Max-Max algorithm; OFDMA; Proportional fair scheduling; RRM;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical and Computer Engineering, 2009. CCECE '09. Canadian Conference on
Conference_Location :
St. John´s, NL
ISSN :
0840-7789
Print_ISBN :
978-1-4244-3509-8
Electronic_ISBN :
0840-7789
Type :
conf
DOI :
10.1109/CCECE.2009.5090232
Filename :
5090232
Link To Document :
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