Browse > Article

Resouce Allocation for Multiuser OFDM Systems  

Chung, Yong-Joo (부산외국어대학교 인터넷비즈니스공학과)
Paik, Chun-Hyun (동의대학교 산업경영공학과)
Kim, Hu-Gon (경성대학교 디지털비즈니스학부 e-비즈니스)
Publication Information
Journal of the Korean Operations Research and Management Science Society / v.32, no.3, 2007 , pp. 33-46 More about this Journal
Abstract
This study deals with the adaptive multiuser OFDM (Orthogonal Frequency Division Multiplexing) system which adjusts the resource allocation according to the environmental changes in such as wireless and quality of service required by users. The resource allocation includes subcarrier assignment to users, modulation method and power used for subcarriers. We first develop a general optimization model which maximizes data throughput while satisfying data rates required by users and total power constraints. Based on the property that this problem has the 0 duality gap, we apply the subgradient dual optimization method which obtains the solution of the dual problem by iteration of simple calculations. Extensive experiments with realistic data have shown that the subgradient dual method is applicable to the real world system, and can be used as a dynamic resource allocation mechanism.
Keywords
OFDM (Orthogonal Frequency Division Multiplexing); Subcarrier; Resource Allocation; Subgradient dual optimization;
Citations & Related Records
연도 인용수 순위
  • Reference
1 김인형, 이용훈, 선형 프로그래밍을 사용한 다중사용자 OFDM 시스템에서의 부채널 및 비트할당 방법, Telecommunication Review, 제12권, 제4호, 2002
2 Li G. and H. Liu, Dynamic resource allocation with finite buffer constraint in broadband OFDMA networks, IEEE Wireless Comm. and Networking, Vol.2(2003), pp. 1037-1042
3 Li G. and H. Liu, Optimal subchannel allocation scheme in multicell OFDMA systems, working paper
4 Mohanram, C., S. Bhashyam, A Sub-optimal Joint Subcarrier and Power Allocation Algorithm for Multiuser OFDM, submitted to IEEE Communications Letters
5 Pfletschinger, S., G. Munz, and J. Speidel, Efficient subcarrier allocation for multiple access in OFDM systems, 7th Inter. OFDM-Workshop, Hamburg, (2002), pp.21-25
6 Shen, Z., J.G. Andrews, B.L. Evans, Adaptive Resource Allocation in Multiuser OFDM Systems with Proportional Fairness, To appear in IEEE Transactions on Wireless Communications
7 Wong, C.Y, R.S. Cheng, K.B. Lataief, and R.D. March, Multiuser OFDM with adaptive subcarrier, bit and power allocation, IEEE JSAC, Vol.27, No.10(1999), pp.1747-1757
8 http://wireless.per.nl/reference/chaptr03/rayjava/raysim.htm#jakes
9 Pahlavan, K. and P. Krishnamurthy, Principles of Wireless Networks, Prentice Hall, 2002
10 Kivanc, D., G. Li, and H. Liu, Computationally efficient bandwidth allocation and power control for OFDMA, IEEE Trans. on Wireless Communications. Vol.2, No.6(2003), pp.1150-1158   DOI   ScienceOn
11 Kim, K., Y. Han, S-L. Kim, Joint Subcarrier and Power Allocation in Uplink OFDMA Systems, IEEE Communication Letters, Vol.9, No.6(2005)
12 Jang, J., K.B. Lee, and Y.H. Lee, Transmit power and bit allocations for OFDM systems in a fading channel, Proc. of IEEE GLOBECOM, Dec. 2003
13 Kim, H., Y. Han, and J. Koo, Optimal subchannel allocation scheme in multi cell OFDMA systems, Proc. of Vehicular Tech. Conf., Vol.3(2004), pp.1821-1825
14 Gross, J., H. Karl, et al., Comparison of heuristic and optimal subcarrier assignment algorithm, Proc, of Wireless Networks, (2003), pp.249-255
15 Li, G. and H. Liu, On the Optimality of the OFDMA Network, working paper
16 Ergen, M., S. Coleri, and P. Varaiya, QoS aware adaptive resource allocation techniques for fair scheduling in OFDMA based broadband wireless access systems, IEEE Trans. on Broadcasting, Vol.49, No.4(2003), pp.362-370   DOI   ScienceOn
17 Rhee, W. and J.M. Cioffi, Increase in capacity of multiuser OFDM system using dynamic subchannel allocation, Proc. of Vehicular Tech. Conf., Vol.2(2000), pp.1085-1089
18 Stephen Boyd, Lin Xiao, and Almir Mutapcic, Subgradient Methods, Stanford University Lecture note, 2003
19 Yin, H., H. Liu, An efficient multiuser loading algorithm for OFDM-based broadband wireless systems, Globecomm, San Francisco, USA, 2000
20 Pietrzyk, S. and G.J.M. Janssen, Multiuser subcarrier allocation for QoS provision in the OFDMA systems, Proc. of Vehicular Tech. Conf., Vol.2(2002), pp.1077-1081
21 Seong, K., M. Mohseni, and J.M. Cioffi, Optimal Resource Allocation for OFDMA Downlink Systems, ISIT, 2006