Science China Information Sciences

, Volume 59, Issue 2, pp 1–8 | Cite as

Energy efficient design for multiuser downlink energy and uplink information transfer in 5G

  • Chunguo Li
  • Yanshan Li
  • Kang Song
  • Luxi Yang
Research Paper Special Focus on 5G Wireless Communication Networks


Simultaneous wireless information and power transfer (SWIPT) is studied in this paper for the wireless powered downlink (DL) and multiuser information uplink (UL) systems. The objective is to maximize the energy efficiency defined as the ratio of the achieved throughput over the energy cost by optimizing the time allocation for the DL and multi-user UL traffics and its goal is to obtain the analytical expression to the optimal time allocation yet the resulting difficulty comes from the sum throughput of the multiuser in UL as well as the corresponding power consumption. To tackle this, the Jensen inequality is applied to approximating the exact expression of the sum throughput for the UL multi-users, leading to an upper-bound of the counterpart. The final closed form is exact in the single-user scenario yet approximate in the multi-user scenario. Numerical simulations verify the tightness of this approximation and the performances of the proposed analytical scheme.


energy harvest time allocation energy efficiency uplink multiuser throughput maximization analytical expression 



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能量获取 时间分配 能量效率 上行链路多用户 吞吐量最大化,解析解 




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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Key Laboratory of Underwater Acoustic Signal Processing of Ministry of EducationSoutheast UniversityNanjingChina
  2. 2.ATR National Key Laboratory of Defense TechnologyShenzhen UniversityShenzhenChina

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