Power Allocation for Capacity Maximization in Sensing-Based Cognitive DF Relay Networks With Energy Harvesting

Li, Hangqi; Zhao, Xiaohui

doi:10.1109/access.2018.2867236

Cited by 3 publications

(1 citation statement)

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“…In [26], a robust power allocation scheme with imperfect channel situation information is investigated to improve worst‐case energy efficiency for uplink underlay OFDM CR system using AF relay protocol. In [27], a power allocation strategy with the uncertainty of spectrum sensing is proposed to maximise the total capacity of SUs in a cognitive network with DF relay protocol, in which the relay device is powered with a capacity‐limited battery. In [28], an asymmetric cross‐layer RA in relay‐aided CR networks is studied, which includes AF and DF relays with the queue stability and QoS requirements.…”

Section: Introductionmentioning

confidence: 99%

Efficient joint resource allocation for cognitive internet of vehicles networks based on asymmetric relay transmission

Song

Wang

et al. 2021

IET Communications

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In the internet of vehicles (IoV) networks, a direct connection from the source end to the destination end may not be established due to the fast vehicle speed, long distance between vehicles, variable vehicle density, serious channel fading etc. In this paper, a joint resource allocation (RA) in the relay-aided IoV networks is modelled as a mixed binary integer non-linear programming (MBINP), which maximises the throughput of cognitive IoV networks among different subcarriers and relays. To further reduce the computational complexity, a suboptimal scheme is presented. First, the appropriate relay and subcarrier pairs are obtained by averaging the power allocation among the cognitive sources and relays. Second, an alternative optimisation mechanism is proposed to the power allocation. Simulation results show that, different from the symmetric time-slot relay transmission, the asymmetric one can significantly increase the degree of freedom for transmission. Therefore, it is more robust to the impact of the relay node location on the throughput. Moreover, the proposed suboptimal RA algorithm not only can obtain the system capacity close to the optimal one, but also can reduce the computational complexity. At the same time, unacceptable degradation caused by severe channel fading is avoided.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%