Wireless Powered Communications With Finite Battery and Finite Blocklength

Abstract

We analyze a wireless communication system with finite block length and finite battery energy, under quasi-static Nakagami-m fading. Wireless energy transfer is carried out in the downlink while information transfer occurs in the uplink. Transmission strategies for scenarios with/without energy accumulation between transmission rounds are characterized in terms of error probability and energy consumption. A power control protocol for the energy accumulation scenario is proposed and results show the enormous impact on improving the system performance, in terms of error probability and energy consumption. The numerical results corroborate the existence and uniqueness of an optimum target error probability, while showing that a relatively small battery could be a limiting factor for some setups, specially when using the energy accumulation strategy. Index TermsFinite blocklength communications, wireless energy transfer, finite battery, power control.

Statistical Tools and Methodologies for Ultrareliable Low-Latency Communication—A Tutorial

“…Therefore, the problem reduces to finding the required SNR γ, such that (49) [or alternatively (47)] holds. It has been shown in [119] that the required γ is the fixed point solution of…”

“…Here, one may use V (γ (0) ) = log 2 2 e for initialization, which comes from letting γ (0) → ∞. The corresponding iterative procedure was shown in [119] to converge fast, i.e., in no more than five iterations for N ≤ 1000 with an accuracy superior to 99.9%. Finally, after solving (50), the required transmit power is given by p = γ/γ ′ .…”

Trade Reliability for Security: Leakage-Failure Probability Minimization for Machine-Type Communications in URLLC

“…Therefore, the impact of FBL codes on reliability should be carefully considered for the design framework in URLLC, which requires a fundamentally different approach from that in current wireless communication systems [4]. To tackle this issue, the authors in [5] derived bounds on the maximal achievable transmission rate in the FBL regime, based on which abounding works have been done to provide the FBL designs, e.g., considering cooperative relay networks [6], non-orthogonal multiple access (NOMA) schemes [7], wireless power transfer [8] and green communications [9].…”

Cooperative resource allocation in cognitive wireless powered communication networks with energy accumulation and deadline requirements

“…Morsi et al [16] proposed two transmission policies (a best-effort policy and an on-off policy) for a WPCN with energy accumulation and investigated their performances. López et al [17] analyzed the error probabilities and energy consumptions of a WPCN with and without energy accumulation and proposed a power control scheme for the energy-accumulation scenario. However, CR technology was not considered in [15][16][17] and CWPCN with energy accumulation was largely neglected.…”

“…López et al [17] analyzed the error probabilities and energy consumptions of a WPCN with and without energy accumulation and proposed a power control scheme for the energy-accumulation scenario. However, CR technology was not considered in [15][16][17] and CWPCN with energy accumulation was largely neglected. A CWPCN with a wirelessly powered secondary transmitter that harvests and accumulates energy from the secondary receiver and the primary transmitter was previously considered [18] and expressions for the achievable throughput of the SU and PU were derived.…”