Abstract
This paper considers a simultaneous wireless information and power transfer (SWIPT) based decode-and-forward (DF) relaying sensor network, where the “save-and-forward” strategy is utilized at the relay sensor node. We investigate a joint power splitting (PS) and relay location (RL) optimization scheme for delay-sensitive transmission mode using the instantaneous channel state information (CSI). In particular, two optimization problems are formulated to minimize the outage probability and maximize the average capacity, respectively. For the two optimization problems, the optimal solutions to the PS ratio and RL are obtained based on the instantaneous CSI. On the basis of optimal solutions, the analytical expressions for outage probability and average capacity are derived, and the corresponding achievable throughputs are obtained. Numerical results verify the correctness of theoretical derivations and validate the advantages of our proposed scheme.
Highlights
With the exponential growth of the wireless data services and the number of mobile users, the fifth generation (5G) wireless systems is expected to be commercialized towards year 2020 and beyond [1]
Using the optimal power splitting (PS) ratio and relay location (RL), we can derive a performance upper bound of the outage probability for the relaying sensor networks, which can be expressed in Proposition 1 below
In order to display the superiority of the proposed joint power splitting and relay location (JPSRL) scheme, the fixed RL scheme with optimal PS ratio is presented
Summary
With the exponential growth of the wireless data services and the number of mobile users, the fifth generation (5G) wireless systems is expected to be commercialized towards year 2020 and beyond [1]. [24] investigated the optimal RL to minimize the outage probability for DF EH relaying networks, in which the relay node is assumed to have sufficient energy supply. In [26], assuming the relay node has constant energy supply, the authors provided the optimal PS ratio and RL based on the statistical CSI for minimizing outage probability of the two-hop DF relaying networks. We investigate the DF EH relaying sensor networks for the delay-sensitive transmission mode, and propose a joint power splitting and relay location (JPSRL) scheme using the instantaneous CSI. We consider the joint optimization of the PS ratio and RL for delay-sensitive transmission mode in the SWIPT enabled DF relaying sensor networks.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
