دانلود رایگان مقاله QoE مبتنی بر استراتژی انتقال اطلاعات بی سیم چند کاربر و انتقال قدرت

Abstract

One solution to the problem of supplying energy to wireless networks is wireless power transfer. One such technology – electromagnetic radiation enabled wireless power transfer – will change traditional wireless networks. In this paper, we investigate a transmission strategy for multi-user wireless information and power transfer. We consider a multi-user multiple-input multiple-output (MIMO) channel that includes one base station (BS) and two user terminals (UT) consisting of one energy harvesting (EH) receiver and one information decoding (ID) receiver. Our system provides transmission strategies that can be executed and implemented in practical scenarios. The paper then analyzes the rate–energy (R–E) pair of our strategies and compares them to those of the theoretical optimal strategy. We furthermore propose a QoE-based mode selection algorithm by mapping the R–E pair to the utility functions.

5. Conclusion

In this paper, we considered the beamforming design for a wireless communication system with both an energy harvesting eceiver and an information decoding receiver for sensor networks or IoT environments. Under a simplified system setup, we formulated a problem to find the transmission strategy for maximizing the R–E pair. By means of MRC, we transformed the original problem into an eigenvalue problem and obtained the solution set. Then we suggested a QoE-based solution selection method for the user’s satisfaction. The performance of the proposed design was confirmed through numerical simulations. Future research includes a beamforming design for the more general cases with multiple transmitters and an algorithm to search for suitable max-QoE parameter λ.