Buffer-Aided Relaying With Direct Link Transmission and Spectrum Sharing

Kandelusy, Omid Moghimi; Kirsch, Nicholas J.

doi:10.1109/tccn.2019.2956140

Cited by 7 publications

(9 citation statements)

References 37 publications

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“…The study also proposed two low-complexity relay selection schemes based on the sum rate maximization. In [22], they proposed a link selection policy to utilise the direct link communication for a buffer-aided relaying in cognitive relay networks. The improvement in outage probability and end-to-end average packet delay can be achieved by their proposed policy.…”

Section: A Relay-assisted Cognitive Radio Networkmentioning

confidence: 99%

Multiple Description Coding for Enhancing Outage and Video Performance Over Relay-Assisted Cognitive Radio Networks

et al. 2022

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Multimedia content delivery, such as video transmission over wireless networks, imposes significant challenges include spectrum capacity and packet losses. The cognitive radio (CR) technology is developed to solve the spectrum issue, while multiple description coding (MDC) is one of the promising source coding techniques to alleviate packet loss problems and exploit the benefit of path diversity. The source information was split into several descriptions in MDC, then transmitted over a network with multiple paths. The quality of the received data increases with the number of descriptions received at the receiver. In this paper, the proposed system comprises of relay-assisted cognitive radio network using the MDC technique for video transmission. In the simulations, the outage performance of the MDC scheme over two networks, which were relay-assisted network and non-relay network, were compared. Then, the outage probability was used to estimate the video quality, peak signal to noise ratio (PSNR) of the received video. The results obtained show the benefits of the relay assisted networks by 9% improvement on average outage performance over the non-relay network. Furthermore, the video performance improved by an average of 9% in PSNR compared to the non-relay system. INDEX TERMSCognitive radio, cognitive radio networks, H.264/AVC, multiple description coding (MDC), outage performance, interweave, peak signal to noise ratio (PSNR), relay.

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Section: A Relay-assisted Cognitive Radio Networkmentioning

confidence: 99%

Multiple Description Coding for Enhancing Outage and Video Performance Over Relay-Assisted Cognitive Radio Networks

et al. 2022

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“…Both [4, 7] are compared with the proposed policy in [10] that combines the benefits of direct communication and BA relaying. Kandelusy and Kirsch [10] modified the hybrid interweave‐underlay spectrum access policy, limiting the interference caused by a miss‐detection event. The OP and APD are derived for the secondary system assuming independent and non‐identical fading channels.…”

Section: Review Of Max‐link Relay Selection Policy and Comparison Witmentioning

confidence: 99%

“…The OP and APD are derived for the secondary system assuming independent and non‐identical fading channels. The policy increases the outage gain, lowers APD, increases the probability of empty buffers, and lowers the probability of full buffers, compared with max link selection and hybrid link selection [10]. The scheme in [8] integrates the status of the relay buffers and instantaneous strength of the links.…”

Section: Review Of Max‐link Relay Selection Policy and Comparison Witmentioning

confidence: 99%

“…• Extend to heterogeneous settings, where buffers are not identical in size [9]. • Extend to a generalised system model with multi‐relays, Nakagami‐m fading channel [10]. • Incorporate the proposed buffer limit in [23] for FD, two‐way and SuR. • Study the influence of the buffer‐limit BTRS with EH [23].…”

Section: Challenges and Opportunities For Future Researchmentioning

confidence: 99%

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Buffer‐aided relaying: a survey on relay selection policies

2020

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Ever since the idea of buffers was incorporated in wireless communications, buffer‐aided relaying has become an emerging breakthrough in the world of transmitting and receiving signals. Equipping the relays with buffers adds a new degree of freedom capable of enhancing numerous quality‐of‐service (QoS) metrics including throughput, outage probability, power efficiency and physical‐layer security. The QoS enhancement is achieved by compromising the end‐to‐end delay that is inflicted by storing the packets in the relays' buffers until a suitable source–relay or relay–destination link is selected. In this context, the selection of a relay for transmission/reception is important since it governs the QoS‐delay trade‐off that can be contemplated. In this survey, the authors review and analyse various link selection protocols in buffer‐aided relaying systems. These relaying strategies are categorised and contrasted according to their performance levels, limitations, applications, system model assumptions and complexity. Finally, they discuss current challenges, and highlight future research directions.

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“…However, providing a highly reliable connectivity for a large secondary network is a challenging problem, especially for the higher transmission rates. In this context, enabling technologies such as buffer-aided relaying [6]- [14] and multiple-antenna technology [15]- [19] can be incorporated to substantially improve the reliability within the secondary network.…”

Section: Introductionmentioning

confidence: 99%

Multiantenna Multisource Multirelay Spectrum Sharing Networks: Buffer-Aware Direct Link Activation for Higher Reliability and Lower Overhead

Kandelusy

Kirsch

2022

IEEE Access

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Cooperative relaying can be implemented in spectrum sharing networks to extend the range of reliable communication. In this paper, we incorporate multiple-antenna technology and buffer-aided relaying to guarantee a highly reliable connectivity for the secondary network with several source nodes. The multi-antenna configuration for the sources and destination nodes suggests that there are several potential source-to-destination channels which can be auspicious for the network in two ways. First: to balance up the buffer states. Second: to expand the link selection opportunity at each time step. Motivated by this rationale, we propose a buffer-aware communication protocol to incorporate the direct transmissions along the relaying links without incurring excess overhead for circulation of channel-state-information (CSI). Considering Nakagami-m fading, we derive closed-form expressions for the end-to-end (ete) outage probability and average packet delay of the secondary network under the proposed protocol. Through Monte-Carlo simulations, we investigate the influential network parameters and evaluate the proposed technique in comparison to two benchmark schemes, one with buffer-based link-prioritization and one without prioritization. Findings demonstrate that the proposed protocol outperforms both benchmarks in terms of outage probability and ete delay, especially as the number of nodes scales up. However, the superior performance comes at the cost of more CSI circulation. Furthermore, it is shown that if the global CSI cannot be collected accurately, then the dependency of the link selection on the global CSI should be relaxed to mitigate the performance loss. The theoretical and Monte-Carlo results coincide in several simulation examples, verifying the presented theoretical analysis.INDEX TERMS Buffer-aided relaying, cognitive radio, multiple antenna, direct link communication, underlay spectrum sharing, MIMO.

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Buffer-Aided Relaying With Direct Link Transmission and Spectrum Sharing

Cited by 7 publications

References 37 publications

Multiple Description Coding for Enhancing Outage and Video Performance Over Relay-Assisted Cognitive Radio Networks

Multiple Description Coding for Enhancing Outage and Video Performance Over Relay-Assisted Cognitive Radio Networks

Buffer‐aided relaying: a survey on relay selection policies

Multiantenna Multisource Multirelay Spectrum Sharing Networks: Buffer-Aware Direct Link Activation for Higher Reliability and Lower Overhead

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