Wireless information and power transfer on cooperative multi-path relay channels

Zhao, Yafei; Li, Qiang; Huang, Likun; Feng, Shangjie; Zhang, Jing

doi:10.1109/iccchina.2016.7636884

Cited by 9 publications

(6 citation statements)

References 30 publications

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“…h S i AP is the DL channel gain between AP and S i ). All the channel gains are assumed to be known by the AP at the beginning of each time block, similar to the previous work, e.g., [4], [19], [25]. x…”

Section: System Modelmentioning

confidence: 99%

“…Now, we exemplify the relay selection condition given in Eq. (19). In this example, an AP and a source are located at (0,0) and (4,0) in a gridded area, respectively.…”

Section: A Optimality Conditionsmentioning

confidence: 99%

“…A straightforward approach to the relay selection problem is to choose the relay randomly inside a circular sector with a central angle in direction of the destination [16]. The relay selection schemes are also designed based on the remaining energies in relay batteries (for the cases where EH relays are equipped with batteries) [17], [18], or channel state information (CSI) either between source-and-relay, relay-and-destination or both [19]- [21]. Outage probability and average throughput of the networks are analyzed as performance indicator.…”

Section: Introductionmentioning

confidence: 99%

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Relay Selection, Scheduling and Power Control in Wireless Powered Cooperative Communication Networks

Onalan¹,

Salik²,

Coleri³

2020

Preprint

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Relay nodes are used to improve the throughput, delay and reliability performance of energy harvesting networks by assisting both energy and information transfer between information nodes and access point. Previous studies on radio frequency energy harvesting networks are limited to single source single/multiple relay networks. In this paper, a novel joint relay selection, scheduling and power control problem for multiple source multiple relay network is formulated with the objective of minimizing the total duration of wireless power and information transfer. The formulated problem is non-convex mixed-integer non-linear programming problem, and proven to be NP-hard. We first formulate a subproblem on scheduling and power control for a given relay selection. We propose an efficient optimal algorithm based on a bi-level optimization over power transfer time allocation. Then, for optimal relay selection, we present optimal exponential-time Branch-and-Bound (BB) based algorithm where the nodes are pruned with problem specific lower and upper bounds. We also provide two BB-based heuristic approaches limiting the number of branches generated from a BB-node, and a relay criterion based lower complexity heuristic algorithm. The performance of the proposed algorithms are demonstrated to outperform conventional harvest-then-cooperate approaches with up to 88% lower schedule length for various network settings.

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Section: System Modelmentioning

confidence: 99%

“…Now, we exemplify the relay selection condition given in Eq. (19). In this example, an AP and a source are located at (0,0) and (4,0) in a gridded area, respectively.…”

Section: A Optimality Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Relay Selection, Scheduling and Power Control in Wireless Powered Cooperative Communication Networks

Onalan¹,

Salik²,

Coleri³

2020

Preprint

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show abstract

“…By using conventional training sequences, the corresponding channel state information of the incoming channel PT→SR can be estimated accurately at the receiver side SR [38], [55], [56] for information detection. Since the focus of our work is on the performance analysis of the proposed EAR scheme over multiple time slots, an upper bound performance is considered for the secondary system.…”

Section: B Outage Analysis Of Secondary Systemmentioning

confidence: 99%

“…Considering that channels keep changing from slot to slot, it is difficult to obtain an accurate instantaneous channel state information of ST→PR at the ST. Thus, rather than adaptively changing the value of E th based on the channel fluctuation for successful transmissions from ST to PR, we assume a fixed value of E th at ST in the hope that statistically a certain outage probability can be achieved at the PR [55], [57]. For simplicity, it is assumed that the feedback of acknowledgement (ACK) or negative acknowledgement (NACK), indicating whether E th is met or not, is error-free and completed immediately with negligible overhead [58].…”

Section: A Proposed Ear Scheme With Energy Accumulation In Phasementioning

confidence: 99%

An Energy-Aware Retransmission Approach in SWIPT-Based Cognitive Relay Systems

Zhang

Pandharipande

et al. 2019

IEEE Trans. Cogn. Commun. Netw.

Self Cite

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In this paper, cooperative spectrum sharing is considered between a primary user (PU) and a secondary user (SU), where the off-the-grid secondary transmitter (ST) serves as a cognitive relay to forward both the received primary and secondary signals by exploiting simultaneous wireless information and power transfer (SWIPT). Based on a two-phase relaying model, power splitting is adopted by the ST for energy harvesting and information processing in the first phase. Next, the harvested energy at the ST is used to amplify-and-forward a linearly weighted combination of the primary and secondary signals, in the second phase. To enhance the reliability of the system and utilize the energy harvested more wisely, an energy-aware retransmission (EAR) scheme is proposed in the first phase to guarantee that a certain minimum amount of energy is collected by the ST before launching the second phase. Both outage and throughput performances are theoretically analyzed for the PU and the SU. Simulation results demonstrate that a win-win relationship is built between the PU and the SU under proper parameter configurations, and the proposed EAR scheme can bring additional performance gains in unfavorable conditions imposed under high rate and low power.

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Total Transmission Time Minimization Through Relay Selection for Full-Duplex Wireless Powered Cooperative Communication Networks

Kazmi

Iqbal

Coleri

2020

Ad-Hoc, Mobile, and Wireless Networks

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Wireless information and power transfer on cooperative multi-path relay channels

Cited by 9 publications

References 30 publications

Relay Selection, Scheduling and Power Control in Wireless Powered Cooperative Communication Networks

Relay Selection, Scheduling and Power Control in Wireless Powered Cooperative Communication Networks

An Energy-Aware Retransmission Approach in SWIPT-Based Cognitive Relay Systems

Total Transmission Time Minimization Through Relay Selection for Full-Duplex Wireless Powered Cooperative Communication Networks

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