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Qingqing Zhang
Tongji University
10Publications
2H-index
13Citations
Publications 10
Newest
Published on Apr 1, 2019in IEEE Internet of Things Journal 5.87
Wei Wang1
Estimated H-index: 1
(Chinese Academy of Sciences),
Qingqing Zhang2
Estimated H-index: 2
(Tongji University)
+ 3 AuthorsQingwen Liu11
Estimated H-index: 11
(Tongji University)
Power supply for Internet of Things (IoT) devices is one of the bottlenecks in IoT development. To provide perpetual power supply for IoT devices, resonant beam charging (RBC) is a promising safe, long-range, and high-power wireless power transfer solution. How long distance RBC can reach and how much power RBC can transfer? In this paper, we analyze the consistent and steady operational conditions of the RBC system, which determine the maximum power transmission distance. Then, we study the pow...
1 Citations Source Cite
Published on Feb 1, 2019in IEEE Internet of Things Journal 5.87
Wen Fang2
Estimated H-index: 2
(Tongji University),
Qingqing Zhang2
Estimated H-index: 2
(Tongji University)
+ 2 AuthorsPengfei Xia2
Estimated H-index: 2
(Tongji University)
Resonant beam charging (RBC) is the wireless power transfer (WPT) technology, which can provide high-power, long-distance, mobile, and safe wireless charging for Internet of Things (IoT) devices. Supporting multiple IoT devices charging simultaneously is a significant feature of the RBC system. To optimize the multiuser charging performance, the transmitting power should be scheduled for charging all IoT devices simultaneously. In order to keep all IoT devices working as long as possible for fai...
2 Citations Source Cite
Published on Feb 1, 2019in IEEE Internet of Things Journal 5.87
Qingqing Zhang2
Estimated H-index: 2
(Tongji University),
Wen Fang2
Estimated H-index: 2
(Tongji University)
+ 3 AuthorsPengfei Xia2
Estimated H-index: 2
(Tongji University)
As a long-range high-power wireless power transfer (WPT) technology, resonant beam charging (RBC) can transmit watt-level power over long distance for the devices in the Internet of Things (IoT). Due to its open-loop architecture, RBC faces the challenge of providing dynamic current and voltage to optimize battery charging performance. In RBC, battery overcharge may cause energy waste, thermal effects, and even safety issues. On the other hand, battery undercharge may lead to charging time exten...
1 Citations Source Cite
Published on Feb 1, 2019in IEEE Internet of Things Journal 5.87
Mingliang Xiong1
Estimated H-index: 1
(Tongji University),
Mingqing Liu1
Estimated H-index: 1
(Tongji University)
+ 3 AuthorsPengfei Xia2
Estimated H-index: 2
(Tongji University)
Resonant beam charging (RBC) can realize wireless power transfer (WPT) from a transmitter to multiple Internet of Things devices via resonant beams. The adaptive RBC (ARBC) can effectively improve its energy utilization. In order to support multiuser WPT in the ARBC system, we propose the time-division multiple access (TDMA) method and design the TDMA-based WPT scheduling algorithm. Our TDMA WPT method has the features of concurrently charging, continuous charging current, individual user power ...
2 Citations Source Cite
Published on Feb 1, 2019in IEEE Internet of Things Journal 5.87
Qingqing Zhang2
Estimated H-index: 2
(Tongji University),
Mingqing Liu1
Estimated H-index: 1
(Tongji University)
+ 3 AuthorsPengfei Xia2
Estimated H-index: 2
(Tongji University)
To enable electric vehicles (EVs) to access to the Internet of Intelligent Vehicles (IoIV), charging EVs wirelessly anytime and anywhere becomes an urgent need. The resonant beam charging (RBC) technology can provide high-power and long-range wireless energy for EVs. However, the RBC system is unefficient. To improve the RBC power transmission efficiency, the adaptive RBC (ARBC) technology was introduced. In this paper, after analyzing the modular model of the ARBC system, we obtain the closed-f...
Source Cite
Published on Feb 1, 2019in IEEE Internet of Things Journal 5.87
Wen Fang2
Estimated H-index: 2
(Tongji University),
Qingqing Zhang2
Estimated H-index: 2
(Tongji University)
+ 2 AuthorsPengfei Xia2
Estimated H-index: 2
(Tongji University)
Resonant beam charging (RBC) is a promising wireless power transfer technology to provide long-range, high-power, mobile, and safe wireless power for the Internet of Things devices. The point-to-multipoint (PtMP) RBC system can charge multiple receivers simultaneously similar to WiFi communications. To guarantee the quality of charging service (QoCS) for each receiver and maximize the overall earning in the PtMP RBC service, we specify the charging pricing strategy and develop the high priority ...
1 Citations Source Cite
Published on Dec 1, 2018 in Global Communications Conference
Aozhou Wu (Tongji University), Qingqing Zhang2
Estimated H-index: 2
(Tongji University)
+ 4 AuthorsPengfei Xia2
Estimated H-index: 2
(Tongji University)
Resonant Beam Charging (RBC) is a promising multi-Watt and multi-meter wireless power transfer method with safety, mobility and simultaneously-charging capability. However, RBC system operation relies on information availability including power receiver location, class label and the receiver number. Since smartphone is the most widely-used mobile device, we propose a Mask R-CNN based smartphone detection model in the RBC system. Experiments illustrate that our model reduces the smartphone scanni...
Source Cite
Published on Oct 1, 2018in IEEE Internet of Things Journal 5.87
Qingqing Zhang2
Estimated H-index: 2
(Tongji University),
Wen Fang2
Estimated H-index: 2
(Tongji University)
+ 3 AuthorsLiuqing Yang36
Estimated H-index: 36
(Colorado State University)
Wireless power transfer (WPT) is a promising solution to provide convenient and perpetual energy supplies to electronics. Traditional WPT technologies face the challenge of providing Watt-level power over meter-level distance for Internet of Things (IoT) and mobile devices, such as sensors, controllers, smart-phones, laptops, etc. Distributed laser charging (DLC), a new WPT alternative, has the potential to solve these problems and enable WPT with the similar experience as WiFi communications. I...
5 Citations Source Cite
Published on Jun 1, 2018
Sai Jiang (Tongji University), Qingqing Zhang2
Estimated H-index: 2
(Tongji University)
+ 3 AuthorsPengfei Xia2
Estimated H-index: 2
(Tongji University)
Existing Unmanned Aerial Vehicles (UAVs) mainly rely on the direct ground-to-UAV communications over the unlicensed spectrum, which can only operate within the visual line of sight. Integrating UAVs into cellular networks is a promising solution to extend the range but poses new challenges to the transport protocols. To ensure the flight safety, the transmission of UAV commands and mission-related data is required to be reliable with low latency. In this paper, we propose a Low-latency Reliable ...
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Published on Sep 1, 2017
Qingqing Zhang2
Estimated H-index: 2
(Tongji University),
Xiaojun Shi1
Estimated H-index: 1
+ 3 AuthorsYong Liao1
Estimated H-index: 1
Distributed laser charging (DLC) is a wireless power transfer technology for mobile electronics. Similar to traditional wireless charging systems, the DLC system can only provide constant power to charge a battery. However, Li-ion battery needs dynamic input current and voltage, thus power, in order to optimize battery charging performance. Therefore, neither power transmission efficiency nor battery charging performance can be optimized by the DLC system. We at first propose an adaptive DLC (AD...
1 Citations Source Cite
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