Optimal Routing and Power Allocation for Wireless Networks with Imperfect Full-Duplex Nodes

Ramírez, David; Aazhang, Behnaam

doi:10.1109/twc.2013.072613.130175

Cited by 46 publications

(36 citation statements)

References 28 publications

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“…Our results show that FD multi hop relaying with proposed power control can improve the end-to-end throughput of a traditional HD multi hop network by a factor of almost three for low power, short range systems, and by 80% for higher power systems. Optimizing power allocation according to the full interference model, the proposed FD multi hop relaying outperforms the solution based on one hop interference [10] by up to a factor of two. Applying power control jointly with routing under the full interference model, the proposed FD routing is shown to enhance the throughput of HD routing by a factor of up to five, and outperform FD routing based on one hop interference by a factor of two.…”

Section: A C C E P T E D Mmentioning

confidence: 99%

“…[9] provides performance comparison of FD and HD multi hop relaying, assuming equal transmit allocation. In [10], an optimal power allocation solution is proposed for FD multi hop networks, considering the interference from single hop neighbor nodes only. In [11], a medium access control (MAC) scheme with power control is proposed for a three node (two hop) FD network scenario, where the power control solution is based on a heuristic search for equalizing link rates.…”

Section: A C C E P T E D Mmentioning

confidence: 99%

“…The effect of residual SI is modeled as the transmit power level attenuated by a constant factor, β, as in [10]. The channel gain between any two nodes i and j is denoted by K i,j , as shown in Figure 2.…”

Section: Optimal Power Allocation For Fd Relaying On a Known Pathmentioning

confidence: 99%

“…Our solution also differs from FD routing in [10], as authors in [10] assume interference from only one hop neighbors, while we assume full interference, where each node can hear all nodes in the network, which is typical for home wireless networks. The single hop interference assumption in [10] is not only far from reality, but also their recursive solution is no longer valid in the case of full interference. On the other hand, our solution considering full interference is applicable to the one hop interference case.…”

Section: A C C E P T E D Mmentioning

confidence: 99%

“…i,j for i = j, where d i,j is the distance between nodes i and j, similar to the numerical experiments in [10]. The propagation environment is assumed to be abundant of obstacles hindering the line of sight communication and leading to heavy path-loss attenuation (high α).…”

Section: Performance Analysismentioning

confidence: 99%

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Power allocation and routing for full-duplex multi hop wireless networks under full interference

2019

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When traditional half-duplex (HD) radios are employed in indoor wireless mesh networks, such as home networks, interference among mesh nodes is a major impairment, as the endto-end throughput is to be shared between all transmitting nodes. Full-duplex (FD) relaying can improve the end-to-end throughput, as simultaneous transmissions and receptions, hence simultaneous links are enabled, but FD nodes are subject to self-interference(SI) in addition to inter-node interference, resulting in a more complicated, full interference scenario. In this work, a power allocation solution is proposed along with routing for enabling FD in such multi hop wireless networks subject to full interference. First, an optimization problem is formulated for maximizing the end-to-end throughput of FD relaying on a given, known path, considering the full interference model. A linear programming based solution is devised to obtain the optimal transmit power levels for FD relaying nodes on the path. Then, for joint power allocation and routing in an FD mesh network, Dijkstra's algorithm is modified by applying the proposed power allocation in the calculation of the path metrics. Via detailed numerical experiments considering different system parameters, such as network size, SI cancellation capability, maximum power level per node, it is shown that the proposed FD relaying with power control based on full interference model outperforms not only HD relaying, but also an existing FD relaying solution based on a single hop interference model. The amount of improvement by FD relaying depends on the system settings. For instance, for low power budget systems, HD throughput can be tripled, while for systems with high power budget, FD relaying achieves 80 percent higher throughput over HD relaying. When power control is combined with routing, the end-to-end throughput performance of the proposed FD routing solution again outperforms the existing solutions. Depending on the power budget, up to two times higher throughput is achieved over FD routing based on single hop interference, and HD routing can be improved by up to five times even for moderate SI cancellation levels. Our results suggest that employing proposed joint power allocation and routing scheme, migration to FD can be beneficial for home wireless mesh networks under full interference, especially for bandwidth-hungry applications, such as video streaming, gaming.

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Section: A C C E P T E D Mmentioning

confidence: 99%

Section: A C C E P T E D Mmentioning

confidence: 99%

Section: Optimal Power Allocation For Fd Relaying On a Known Pathmentioning

confidence: 99%

Section: A C C E P T E D Mmentioning

confidence: 99%

Section: Performance Analysismentioning

confidence: 99%

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Power allocation and routing for full-duplex multi hop wireless networks under full interference

2019

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In‐Band Full‐Duplex Transmission

Choi¹,

Kim²,

Hong³

2019

Wiley 5G Ref

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In‐band full‐duplex (IBFD) operation, a node simultaneously transmits and receives data using a single channel, is an approach that offers great potential to improve spectral efficiency. One of the major difficulties in implementing IBFD systems is self‐interference (SI), which is produced when its own transmitted signal affects the received signal. This article first reviews the basic concepts of IBFD transmission and SI cancellation (SIC) schemes. With the aid of recent progress in SIC, it is shown the SI between the transmitter and receiver on a common channel can be reduced to the noise level, which makes data decoding feasible in IBFD transmission. Accordingly, the effects of IBFD transmission on system performance in various networks are discussed. Furthermore, this chapter also provides the research challenges and opportunities associated with the design and analysis of IBFD systems. Finally, we conclude this chapter by addressing the advantages of IBFD transmission when exploited for different purposes such as non‐orthogonal multiple access, cognitive radios, network secrecy, and wireless power transfer.

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An interuser interference suppression approach in full‐duplex wireless communications

Zhang

et al. 2018

Trans Emerging Tel Tech

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Considering that a full‐duplex network is composed of a full‐duplex base station (BS) and 2 half‐duplex users, one user transmits on the uplink channel and the other receives through the downlink channel on the same frequency. The uplink user will generate interuser interference (IUI) on the downlink user through the interference channel. In this paper, we propose a novel IUI suppression scheme when the BS knows the full channel state information. The main idea of this scheme is to retransmit the weighted uplink signal as soon as it has been received by the BS. For the narrowband case, we first assess the performance of the proposed scheme through simulation with residual self‐interference at the BS. Specially, we derive the closed‐form expression of the optimum weighted coefficient when self‐interference is perfectly canceled at the BS and then discuss the performance of the proposed IUI suppression scheme in practical considerations. Furthermore, the proposed IUI suppression scheme can be extended to the broadband case using a time‐domain weighted filter. Simulation results show the advantage over existing IUI suppression schemes.

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Optimal Routing and Power Allocation for Wireless Networks with Imperfect Full-Duplex Nodes

Cited by 46 publications

References 28 publications

Power allocation and routing for full-duplex multi hop wireless networks under full interference

Power allocation and routing for full-duplex multi hop wireless networks under full interference

In‐Band Full‐Duplex Transmission

An interuser interference suppression approach in full‐duplex wireless communications

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