Secure Multiuser Scheduling for Hybrid Relay-Assisted Wireless Powered Cooperative Communication Networks With Full-Duplex Destination-Based Jamming

Abstract

In this paper, we investigate secure communication in a hybrid relay (HR)-assisted wireless powered cooperative communication network (WPCCN), where an eavesdropper tries to intercept the data transmitted by a source user and the HR simultaneously. The HR has the ability to wireless powered the energy-constrained multiple users in the downlink and to relay the received confidential information in the uplink. In particular, the full-duplex destination-based jamming (FD-DBJ) strategy is exploited to improve the secrecy performance. Moreover, in order to conduct effective secure communications, we design two multiuser scheduling schemes, i.e., random user selection (RUS), and best user selection (BUS) based on the main channel quality. In order to evaluate the secrecy performance, we analytically derive the energy outage probability (EOP), the secrecy outage probability (SOP), and the hybrid outage probability (HOP), respectively. As such, we formulate the secrecy throughput (ST) maximization problem to optimize the predetermined transmission rate. Our analysis and numerical results reveal that: 1) The BUS scheme has better security performance. 2) Both of the energy conversion efficiency and the number of users have a positive effect on secrecy performance. 3) The FD-DBJ scheme is an effective method to achieve secure communications. 4) The the time-switching factor and predetermined transmission rate have a crucial influence on the secrecy performance, which should be considered carefully in system design. INDEX TERMS Wireless powered cooperative communication networks, hybrid relay, full-duplex destination-based jamming, physical layer security, secrecy outage probability. I. INTRODUCTION A. BACKGROUND VOLUME 4

Multiuser-scheduling and resource allocation using max-min technique in wireless powered communication networks

“…Further, the conventional max-min scheduling scheme has disadvantages like limited throughput since relay nodes are not equipped with a buffer. Additionally, there is very little probability of scheduling for users with inferior channel quality [36]. In addition, the user pairs, who have poor channel quality, are segregated into two batches.…”

Impact of Artificial Noise on Security Capability of Energy Harvesting Overlay Networks

“…Since Yðg ps Þ is a function of random variables ( G, H, U) which are also functions of the random variable g ps according to (17), (18), and (25), O s ðC 0 Þ in (55) is computed as…”

“…Nonetheless, both cognitive and primary users in these networks are allowed to transmit on the LFB concomitantly that may facilitate eavesdroppers in emulating legal users to overhear privacy messages, seriously alerting security problems. To supplement and enhance security performance for conventional encryption and cryptographic solutions, physical layer security (PHY security) has lately been emerged as a promising candidate [17][18][19]. PHY security can be deployed with numerous techniques, including relaying and jamming.…”

Enhancing secrecy performance of energy harvesting NOMA systems using IoT user scheduling under untrusted users

“…To overcome the secrecy challenges arising from the broadcast property of wireless communications, physical-layer security (PLS) as a beneficial approach has been proposed. The view of PLS is taking advantage of the channel randomness in wireless transmissions to ensure security [5,[13][14][15][16][17]. To offer more enhancements in the PLS of wireless communications, user scheduling strategies and also there is a wide use of relay selection strategies in the literature [6,[14][15][16][17][18][19][20][21].…”

“…The view of PLS is taking advantage of the channel randomness in wireless transmissions to ensure security [5,[13][14][15][16][17]. To offer more enhancements in the PLS of wireless communications, user scheduling strategies and also there is a wide use of relay selection strategies in the literature [6,[14][15][16][17][18][19][20][21]. The authors in [14] propose user-pair scheduling schemes to calculate the secrecy outage probability (SOP) of a cooperative system with the aid of friendly jammers.…”