User cooperation for enhanced throughput fairness in wireless powered communication networks

Zhong, Mingquan; Bi, Suzhi; Lin, Xiaohui

doi:10.1007/s11276-016-1401-1

Cited by 23 publications

(23 citation statements)

References 20 publications

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“…According to the data rates of WDs given in equations (20), ( 21), (22), and (23), both the spectral efficiency and fairness of our proposed protocol can be evaluated. More specifically, sum throughput performance can reflect spectral efficiency, that is…”

Section: Stage Iii: Cluster-to-hap Transfermentioning

confidence: 99%

“…Subsequently, many researchers proposed different methods of user cooperation to improve user fairness of WPCN, that is, users close to the associated HAP forwarded the information of users far away from the associated HAP. [20][21][22][23][24][25][26][27][28] For example, Zhong et al 20 presented those two users interact with each other's information to form a distributed system of antennas that jointly transfer their messages Chen et al 21 thought of a simple reference module for three nodes in a WPCN, where a harvest-then-cooperate (HTC) protocol was first put forward, and then extended it to common multi-user collaboration scenarios. Ju and Zhang 22 proposed a two-user collaboration method, in which the closer user acted as a relay to assist in transmitting the farther user's message to HAP.…”

Section: Introductionmentioning

confidence: 99%

“…Ju and Zhang 22 proposed a two-user collaboration method, in which the closer user acted as a relay to assist in transmitting the farther user's message to HAP. Zhong et al 23 further considered a general multi-user scenario: multiple users are used to assist users far from the associated HAP to transmit their formation. Besides, Yuan et al [29][30][31] proposed a multi-antenna cluster-based cooperation protocol, in which a WD acted as a cluster head (CH) and relayed the other cluster members' (CMs) messages to the HAP.…”

Section: Introductionmentioning

confidence: 99%

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Interactive communication with clustering collaboration for wireless powered communication networks

Yuan

Chen

Gong

2022

International Journal of Distributed Sensor Networks

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In this article, we propose a novel wireless powered communication network, which is composed of two multiple antennas hybrid access points and a series of distributed wireless devices. The two hybrid access points transmit downlink wireless energy to the wireless devices and receive uplink wireless messages from the wireless devices; meanwhile, the information of wireless devices nearer to their corresponding hybrid access point should be transmitted to the faraway hybrid access point. To improve the throughput performance of some wireless devices away from their corresponding hybrid access point, we propose a clustering-collaboration interactive communication protocol with multiple antennas by Time Division Multiple Access, where two of the distributed wireless devices are selected as cluster heads to help relay information of other cluster members, which can efficiently improve some faraway wireless devices’ throughput performance. However, its performance is also constrained by cluster heads’ high-energy consumption. To solve this energy imbalance problem, multi-antenna energy beamforming technology is exploited for the hybrid access points, which distributes more transmission power to the cluster heads to balance all the wireless devices’ energy consumption. In particular, we obtain the proposed system’s throughput performance through the multi-antenna cluster-based collaboration, and verify through simulations that this scheme can effectively enhance user unfairness and improve the throughput performance.

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Section: Stage Iii: Cluster-to-hap Transfermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interactive communication with clustering collaboration for wireless powered communication networks

Yuan

Chen

Gong

2022

International Journal of Distributed Sensor Networks

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“…In [ 26 ], the paper considered two communication groups that cooperated via the WPT and time sharing to fulfill their expected information delivery and achieve a “win-win” collaboration. In [ 27 ], they presented a new user cooperation method where a pair of wireless powered UNs first exchanged their independent messages with each other and then transmitted jointly to the destination node, enhancing the throughput fairness in WPCNs. In [ 28 ], they considered implementing energy-efficient information transfer to mitigate the “near-far” effect.…”

Section: Related Workmentioning

confidence: 99%

“…Based on the information, each UN controls its operation in the time block. Since the energy consumption of receiving the controlling information is much less than that of transmission information in the time block, its energy cost is ignored [ 14 , 25 , 26 , 27 , 32 ].…”

Section: System Model and Problem Formulationmentioning

confidence: 99%

Fairness-Aware Resource Allocation in Multi-Hop Wireless Powered Communication Networks with User Cooperation

Lei

Zhang

Ding

et al. 2018

Sensors

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In wireless powered communication networks (WPCNs), the harvested energy varies greatly among user nodes (UNs), resulting in throughput unfairness. Since the harvested energy is limited, each UN must strategically allocate the energy used for forwarding the other nodes’ information and for transmitting its own information, which further aggravates the global unfairness in terms of throughput. In this paper, we leverage user cooperation in multi-hop transmission to improve the throughput fairness. We formulate the fairness problem as the max-min throughput with resource allocation, which is NP-hard. We design an approximate algorithm to address this problem. The theoretical proof and the simulation results both show that the proposed algorithm provides tight upper and lower bounds for the optimal solution. Compared with the benchmark methods, our proposed method significantly enhances the throughput fairness for WPCNs.

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Reusing Wireless Power Transfer for Backscatter-Assisted Cooperation in WPCN

Lin

et al. 2018

Machine Learning and Intelligent Communications

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This paper studies a novel user cooperation method in a wireless powered communication network (WPCN), where a pair of closely located devices first harvest wireless energy from an energy node (EN) and then use the harvested energy to transmit information to an access point (AP). In particular, we consider the two energy-harvesting users exchanging their messages and then transmitting cooperatively to the AP using space-time block codes. Interestingly, we exploit the short distance between the two users and allow the information exchange to be achieved by energy-conserving backscatter technique. Meanwhile the considered backscatter-assisted method can effectively reuse wireless power transfer for simultaneous information exchange during the energy harvesting phase. Specifically, we maximize the common throughput through optimizing the time allocation on energy and information transmission. Simulation results show that the proposed user cooperation scheme can effectively improve the throughput fairness compared to some representative benchmark methods.

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User cooperation for enhanced throughput fairness in wireless powered communication networks

Cited by 23 publications

References 20 publications

Interactive communication with clustering collaboration for wireless powered communication networks

Interactive communication with clustering collaboration for wireless powered communication networks

Fairness-Aware Resource Allocation in Multi-Hop Wireless Powered Communication Networks with User Cooperation

Reusing Wireless Power Transfer for Backscatter-Assisted Cooperation in WPCN

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