Energy Efficiency Optimization for AF Relaying with TS-SWIPT

Recently, researchers pay much attention to Wireless Power Transfer-supported Deviceto-Device (D2D) Communication underlaying Cellular Network (WPT-DCCN), which has reliable and controllable energy resource, high energy and spectral efficiency. However, the Energy Efficiency (EE) of the whole WPT-DCCN, which combines the time allocation and the power control of all users (including base station, cellular and D2D user), is rarely studied. Consequently, this study establishes an EE optimization model of the whole WPT-DCCN. Facing the complexity of the modeled mathematical model, the EE problem is approximately converted to a convex one by a proposed Convex Approximation Scheme (CAS). Due to the fractional expression of the variables needed to be solved, it is hard to directly obtain an optimal solution for the converted convex problem through current convex optimization toolbox such as CVX. Thus, we skillfully utilize the Generalized Benders Decomposition (GBD) to obtain an optimal solution for the converted convex problem by analyzing the characteristics of the converted problem. Simulation results show that the proposed CAS can give a tight lower-bound solution of the original EE problem. Furthermore, CAS can help us to investigate some meaningful system features, for example the suitable energy conversion efficiency setting under different WPT-DCCN scenarios, which can give us a clear reference about the deployment of future WPT-DCCN.INDEX TERMS Wireless power transfer, D2D communication, energy efficiency, time allocation, power control, convex approximation scheme.

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“…The sufficiency and necessity of the above Theorem can be proved in Appendix, which is similar to references [26], [27].…”

Section: A the Fractional Equivalent Conversion Methodsmentioning

confidence: 74%

Energy Efficient Resource Allocation for Wireless Power Transfer-Supported D2D Communication With Battery

2019

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“…Recently, simultaneous wireless information and power transfer (SWIPT) has been considered a promising solution to address this problem because it allows the sensor device to harvest energy from radio frequency (RF) signals and exchange data packets using the harvested energy [13][14][15]. In addition, SWIPT can be classified into power-splitting (PS)-SWIPT and time-switching (TS)-SWIPT according to the receiver architecture [16][17][18]. In PS-SWIPT, the receiver splits the received RF signal into two separate signal streams to harvest energy and obtain information at the same time.…”

Section: Introductionmentioning

confidence: 99%

TSCH Multiple Slotframe Scheduling for Ensuring Timeliness in TS-SWIPT-Enabled IoT Networks

2020

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This paper presents a time-slotted channel hopping (TSCH) multiple slotframe scheduling (TMSS) protocol to ensure the timeliness of energy harvesting and data transmission for sensor devices with different transmission periods in Internet of Things (IoT) networks enabled with time-switching simultaneous wireless information and power transfer (TS-SWIPT). The TMSS uses a modified three-step 6P transaction to allocate power and data cells within the slotframe. The sensor device sets the slotframe length equal to the transmission period and estimates the number of power and data cells for allocation in the configured slotframe and requests cell allocation to the hybrid access point (HAP). Upon request from a sensor device, the HAP executes a cell-overlapping prevention (COP) algorithm to resolve the cell-overlapping problem and responds to the sensor device with a candidate cell list. Upon receiving the response from HAP, the sensor device determines its power and data cells by referring to the cell list. We conducted experimental simulations and compared the TMSS performance to that of the legacy TSCH medium access control (MAC) with a single slotframe and the harvest-then-transmit-based modified enhanced distributed coordination function (EDCF) MAC protocol (HE-MAC). The results showed that TMSS outperforms legacy TSCH MAC and HE-MAC in terms of delay, effective throughput and energy utilization.

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Research on Physical Layer Security Performance of Hybrid RF/FSO System Based on RIS Assistance under FSO Eavesdropping Environment

Sun,

Yan,

Wang

2024

IEEE Photonics J.

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Energy Efficiency Optimization for AF Relaying with TS-SWIPT

Cited by 4 publications

References 25 publications

Energy Efficient Resource Allocation for Wireless Power Transfer-Supported D2D Communication With Battery

Energy Efficient Resource Allocation for Wireless Power Transfer-Supported D2D Communication With Battery

TSCH Multiple Slotframe Scheduling for Ensuring Timeliness in TS-SWIPT-Enabled IoT Networks

Research on Physical Layer Security Performance of Hybrid RF/FSO System Based on RIS Assistance under FSO Eavesdropping Environment

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