On Outage Probability for Two-Way Relay Networks with Stochastic Energy Harvesting

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題名:	On Outage Probability for Two-Way Relay Networks with Stochastic Energy Harvesting
作者:	古孟霖;Li, Wei;Ku, Meng-Lin;Chen, Yan;Ray Liu, K. J.
貢獻者:	資訊電機學院通訊工程學系
關鍵詞:	amplify-and-forward;Batteries;decode-and-forward;Fading channels;Markov decision process;outage probability;Protocols;Relay networks (telecommunications);Stochastic energy harvesting;Stochastic processes;two-way relay network;Wireless communication
日期:	2016-05-01
上傳時間:	2026-04-23 13:04:37 (UTC+8)
出版者:	Institute of Electrical and Electronics Engineers Inc.;New York: IEEE
摘要:	摘要： In this paper, we propose an optimal relay transmission policy by using a stochastic energy harvesting (EH) model for the EH two-way relay network, wherein the relay is solar-powered and equipped with a finite-sized battery. In this policy, the long-term average outage probability is minimized by adapting the relay transmission power to the wireless channel states, battery energy amount, and causal solar energy states. The designed problem is formulated as a Markov decision process (MDP) framework, and conditional outage probabilities for both decode-and-forward (DF) and amplify-and-forward (AF) cooperation protocols are adopted as the reward functions. We uncover a monotonic and bounded differential structure for the expected total discounted reward, and prove that such an optimal transmission policy has a threshold structure with respect to the battery energy amount in sufficiently high SNRs. Finally, the outage probability performance is analyzed and an interesting saturated structure for the outage performance is revealed, i.e., the expected outage probability converges to the battery empty probability in high SNR regimes, instead of going to zero. Furthermore, we propose a saturation-free condition that can guarantee a zero outage probability in high SNRs. Computer simulations confirm our theoretical analysis and show that our proposed optimal transmission policy outperforms other compared policies. 其他題名： TCOMM 出版者： New York: IEEE 出版日期： 2016-05 出處： IEEE transactions on communications, 2016-05, Vol.64 (5), p.1901-1915 資源來源： IEEE Xplore Digital Library 版權： Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2016 識別號： ISSN: 0090-6778 識別號： EISSN: 1558-0857 識別號： DOI: 10.1109/TCOMM.2016.2547954 識別號： CODEN: IECMBT
顯示於類別:	[通訊工程學系] 期刊論文

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