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http://dx.doi.org/10.5573/ieie.2015.52.6.003

Energy Optimized Transmission Strategy in CDMA Reverse Link: Graph Theoretic Approach  

Oh, Changyoon (Dept. of Information and Communication Engineering, Inha Technical College)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.52, no.6, 2015 , pp. 3-9 More about this Journal
Abstract
We investigate rate scheduling and power allocation problem for a delay constrained CDMA systems. Specifically, we determine an energy efficient scheduling policy, while each user maintains the short term (n time slots) average throughput. We consider a multirate CDMA system where multirate is achieved by multiple codes. Each code can be interpreted as a virtual user. The aim is to schedule the virtual users into each time slot, such that the sum of transmit energy in n time slots is minimized. We then show that the total energy minimization problem can be solved by a shortest path algorithm. We compare the performance of the optimum scheduling with that of TDMA-type scheduling.
Keywords
Transmit Energy; Shortest Path Algorithm; Scheduling;
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1 P. Viswanath et. al., Optimal Sequences, Power Control, and User Capacity of Synchronous CDMA Systems with linear MMSE Multiuser Receivers, IEEE Transactions on Information Theory Vol. 45, No. 6, September 1999.
2 C. De Simone, M. Lucertini, S. Pallottino, Fair dissections of spiders, worms, and caterpillers. Networks, 20:323-344, 1990.   DOI
3 Z. Hasan et al.,, Green Cellular Networks: A Survey, Some Research Issues and Challenges, IEEE Communications Surveys & Tutorials, vol. 13, no. 4, p534-540, Fourth Quarter 2011.
4 E. Calvanese Strinati at al., Green Communications: An Emerging, p267-301, May, Journal of Green Engineering, 2011.
5 S. Cui, R. Madan, A. J. Goldsmith, and S. Lall, Energy-delay tradeoffs for data collection in TDMA-based sensor networks. In IEEE International Conference on communications, ICC'05, May 2005.
6 Y. Yao and G. B. Giannakis, Energy-efficient scheduling protocols for wireless sensor networks. In IEEE International Conference on Communications, ICC'05, May 2005.
7 F. Berggren and Seong-Lyun Kim, Energy-efficient control of rate and power in DS-CDMA systems, IEEE Transactions on Wireless Communications, 3(3):725-733, May 2004.   DOI   ScienceOn
8 Il-Min Kim, R. Yim, and H. Chaskar, Optimum scheduling for smart antenna systems in Rayleigh fading channels, IEEE Transactions on Communications, 53(7):1210-1219, July 2005.   DOI   ScienceOn
9 Tao Shu and Marwan Krunz. Energy-efficient power/rate control and scheduling in hybrid TDMA/CDMA wireless sensor networks. Computer Networks: The International Journal of Computer and Telecommunications Networking, Vol. 53 Issue 9, 1395-1408. June 2009.   DOI
10 M.R. Garay and D.S. Johnson, A guide to the theory of NP completeness. W.H, Freeman and company, 1991.
11 S. Ulukus, F. Biglieri, M Win, Optimum modulation and multicode formats in CDMA systems with multiuser receivers, INFOCOM 2001, Vol. 1, 395-402.