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Wireless Networks

, Volume 20, Issue 6, pp 1409–1420 | Cite as

A green radio resource allocation scheme for LTE-A downlink systems with CoMP transmission

  • Wen-Ching ChungEmail author
  • Chung-Ju Chang
  • Hsin-Ying Teng
Article

Abstract

In this paper, we propose a green radio resource allocation (GRRA) scheme for LTE-advanced downlink systems with coordinated multi-point (CoMP) transmission to support multimedia traffic. The GRRA scheme defines a green radio utility function, which is composed of the required transmission power, assigned modulation order, and the number of coordinated transmission nodes. By maximizing this utility function, the GRRA scheme can effectively save transmission power, enhance spectrum efficiency, and guarantee quality-of-service requirements. The simulation results show that when the traffic load intensity is greater than 0.7, the GRRA scheme can save transmission power by more than 33.9 and 40.1 %, as compared with the conventional adaptive radio resource allocation (ARRA) scheme (Tsai et al. in IEEE Trans Wireless Commun 7(5):1734–1743, 2008) with CoMP and the utility-based radio resource allocation (URRA) scheme (Katoozian et al. in IEEE Trans Wireless Commun 8(1):66–71, 2009) with CoMP, respectively. Besides, it enhances the system throughput by approximately 5.5 % and improves Jain’s fairness index for best effort users by more than 155 % over these two ARRA and URRA schemes.

Keywords

Green radio Resource allocation CoMP LTE-A QoS Fairness 

Notes

Acknowledgments

The authors would like to give thanks the anonymous reviewers for their suggestions to improve the presentation of the paper. The work was supported by National Science Council (NSC), Taiwan, under contract number NSC 100-2221-E-009-102-MY3, and the Ministry of Education, Taiwan, under the ATU plan.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Wen-Ching Chung
    • 1
    Email author
  • Chung-Ju Chang
    • 1
  • Hsin-Ying Teng
    • 1
  1. 1.Department of Electrical and Computer EngineeringNational Chiao Tung UniversityHsinchuTaiwan, ROC

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