Full-Duplex or Half-Duplex: A Bayesian Game for Wireless Networks with Heterogeneous Self-Interference Cancellation Capabilities

This article studied the application of multiple protocol switching mechanism (PSM) over cooperating Non-Orthogonal Multiple Access (NOMA) networks to minimize the probability of outage and maximize the system throughput and energy efficiency (EE). This study investigated six scenarios: (1) a cooperative NOMA system with half-duplex (HD) and decode-and-forward (DF) protocols at the relay; (2) a cooperative NOMA system with full-duplex (FD) and DF protocols at the relay; (3) a cooperative NOMA system with HD and amplification amplify-and-forward (AF) with fixed-gain (FG) protocols at the relay; (4) a cooperative NOMA system with HD and amplification AF with variable-gain (VG) protocols at the relay; (5) a cooperative NOMA system with FD and amplification AF with FG protocols at the relay; (6) a cooperative NOMA system with FD and amplification AF with VG protocols at the relay. Based on the results of analysis and simulations, the study determined the transmission scenario for best system performance. This paper also proposed a mechanism to switch between HD/FD and DF/AF with FG/VG protocols in order to improve the quality of service (QoS) for users with a weak conditional channel. This mechanism can be deployed in future 5G wireless network sensors. Finally, EE was also assessed in relation to future green-wireless networks (G-WNs).

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Power Resource Optimization for Backscatter-Aided Symbiotic Full-Duplex Secondary Transmission with Hardware Impairments in a Cognitive Radio Framework

Sensors ◽

10.3390/s22010375 ◽

2022 ◽

Vol 22 (1) ◽

pp. 375

Author(s):

Derek Kwaku Pobi Asiedu ◽

Ji-Hoon Yun

Keyword(s):

Cognitive Radio ◽

Interference Cancellation ◽

Resource Optimization ◽

Full Duplex ◽

Power Resource ◽

Hardware Impairments ◽

Half Duplex ◽

Link Rate ◽

Sum Rate ◽

Secondary Link

This paper investigates the power resource optimization problem for a new cognitive radio framework with a symbiotic backscatter-aided full-duplex secondary link under imperfect interference cancellation and other hardware impairments. The problem is formulated using two approaches, namely, maximization of the sum rate and maximization of the primary link rate, subject to rate constraints on the secondary link, and the solution for each approach is derived. The problem of a half-duplex secondary link is also solved. Simulation results show that the sum rate and exploitation of the full-duplex capability of the secondary link are strongly affected by both the problem objective and hardware impairments.

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Full-Duplex Multi-Hop Wireless Networks Optimization with Successive Interference Cancellation

Sensors ◽

10.3390/s18124301 ◽

2018 ◽

Vol 18 (12) ◽

pp. 4301 ◽

Cited By ~ 1

Author(s):

Lei Shi ◽

Zhehao Li ◽

Xiang Bi ◽

Lulu Liao ◽

Juan Xu

Keyword(s):

Mathematical Model ◽

Wireless Networks ◽

Interference Cancellation ◽

Optimal Algorithm ◽

Successive Interference Cancellation ◽

Full Duplex ◽

Harsh Environment ◽

Interference Avoidance ◽

Simulation Results ◽

The Mathematical Model

In wireless network communication, in-band full-duplex technique is a useful and important technique that can enlarge the whole throughput of the wireless networks. However, its use needs harsh environment. The successive interference cancellation can make several transmitters’ data be received simultaneously by the receiver, and can make the in-band full-duplex technique be used easily in reality. In this paper, we try to propose an optimal algorithm for increasing the throughput of full-duplex multi-hop wireless networks with successive interference cancellation, which we call the full-duplex successive interference cancellation (FD-SIC) wireless networks. We first describe the mathematical model for the FD-SIC wireless networks and show it is NP-hard in general. Then, we propose a heuristic algorithm, namely the use-up-link-capacity iterative (UULC-iterative) algorithm, for each node’s routing and transmitting scheme. Simulation results show that the proposed algorithm for FD-SIC wireless networks can achieve better throughput compared with SIC-only networks and the interference avoidance networks.

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Performance analysis of in-band collision detection for dense wireless networks

EURASIP Journal on Wireless Communications and Networking ◽

10.1186/s13638-021-01940-4 ◽

2021 ◽

Vol 2021 (1) ◽

Author(s):

Tom Vermeulen ◽

Brecht Reynders ◽

Fernando E. Rosas ◽

Marian Verhelst ◽

Sofie Pollin

Keyword(s):

Energy Efficiency ◽

Wireless Networks ◽

Collision Detection ◽

Full Duplex ◽

Enabling Technology ◽

Detection Scheme ◽

Massive Growth ◽

Half Duplex ◽

Negative Effect ◽

Dense Wireless Networks

AbstractWith the massive growth of wireless networks comes a bigger impact of collisions and interference, which has a negative effect on throughput and energy efficiency. To deal with this problem, we propose an in-band wireless collision and interference detection scheme based on full-duplex technology. To study its performance, we compare its throughput and energy efficiency with the performance of traditional half-duplex and symmetric in-band full-duplex transmissions. Our analysis considers a realistic protocol and overhead modeling, and a measurement-based self-interference model. Our results indicate that our proposed collision detection scheme can provide significant gains in terms of throughput and energy efficiency in large wireless networks. Moreover, when compared to half-duplex and symmetric full-duplex, our analysis shows that this scheme allows up to 45% more nodes in the network for the same energy consumption per bit. These results suggest that this could be an enabling technology towards efficient, dense wireless networks.

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