Short-Packet Communications in Multihop Networks With WET: Performance Analysis and Deep Learning-Aided Optimization

Abstract

In this paper, we study short-packet communications in multi-hop networks with wireless energy transfer, where relay nodes harvest energy from power beacons to transmit short packets to multiple destinations. It is proposed a novel cooperative beamforming relay selection (CRS) scheme which incorporates partial relay selection and distributed multiuser beamforming to achieve a high-reliable transmission in two consecutive hops. A closed-form expression for the average block error rate (BLER) of the CRS scheme is derived, based on which an asymptotic analysis is also carried out. To achieve optimal channel uses allocation, we formulate a fairness end-toend throughput maximization problem which is generally NPhard due to the non-concavity of the objective function and mixed-integer constraints. To solve this challenging problem efficiently, we first relax channel uses to be continuous and transform the relaxed problem into an equivalent non-convex one, but with a more tractable form. We then develop a lowcomplexity iterative algorithm relying on inner approximation framework to convexify non-convex parts that converges to at least a locally optimal solution. Towards real-time settings, we design an efficient deep convolutional neural network (CNN) with multiscale-accumulation connections to achieve the suboptimal solution of the relaxed problem via real-time inference processes. Numerical results are presented to verify the analytical derivations and to demonstrate performance improvements of the CRS scheme over the benchmark ones in terms of BLER, reliability, latency, and throughput in various settings. Moreover, the designed CNN provides the lowest root-mean-square error compared to the state-of-the-art deep learning approaches while the CNN-aided optimization framework estimates accurately the optimal channel uses allocation with low execution time.

Secrecy Performance Analysis of Cooperative Multihop Transmission for WSNs under Eavesdropping Attacks

“…However, this work did not consider an eavesdropping attack. In [37], the authors exploited the outage performance for short packet communication in a multihop transmission with wireless energy transfer. This work also did not consider an eavesdropping attack.…”

“…Different from previous works in [34][35][36][37] that studied various strategies to improve multihop transmission performance without considering an active eavesdropper attack, we propose a cooperative multihop relaying network in confronting a passive and active eavesdropper using node selection schemes. Other works in [30][31][32] only studied the secrecy performance of a dual-hop transmission under active eavesdropping attacks, while with the higher number of node clusters, the end-to-end security is harder to be deployed in multicluster WSNs [10].…”

Multihop MIMO Full-Duplex Relay Networks with Short-Packet URLLCs

“…However, the simulation method suffers from long execution times over enormous numbers of iterations to achieve exactly converged results, whereas the numerical-integration method takes a very long time to solve non-trivial functions. Because of the high accuracy of estimating nonlinear functions at considerably low complexity, DL-based evaluation has overcome the limitations of model-based approaches [19], [20]. In this study, a deep multiple-output neural network (DMNN) framework, which is an extended version of a conventional deep neural network (DNN), was designed to effectively and simultaneously predict multiple performance metrics in terms of the ETP, energy efficiency (EE), and reliability.…”

Short Packet Communications for Relay Systems With Co-Channel Interference at Relay: Performance Analysis and Power Control

“…Deploying both AF and DF, the performance system in terms of BLER of a cooperative network where a relay is shared for cellular network and Internet of Things (IoT) network was evaluated [15]. The authors of [16] used machine learning as a novel tool for addressing the throughput maximization of a multi-hop network with SPC. With the effective combination of AF and DF protocols, the authors in [17] proposed a new relay protocol that achieves performance advantages and saves transmission power.…”