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Qingqing Zhang
Tongji University
10Publications
2H-index
13Citations
Publications 10
Newest
#1Qingqing Zhang (Tongji University)H-Index: 2
#2Wen Fang (Tongji University)H-Index: 2
Last.Pengfei Xia (Tongji University)H-Index: 13
view all 6 authors...
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...
Dec 1, 2018 in GLOBECOM (Global Communications Conference)
#1Aozhou Wu (Tongji University)
#2Qingqing Zhang (Tongji University)H-Index: 2
Last.Pengfei Xia (Tongji University)H-Index: 2
view all 7 authors...
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...
#1Qingqing Zhang (Tongji University)H-Index: 2
#2Wen Fang (Tongji University)H-Index: 2
Last.Liuqing Yang (CSU: Colorado State University)H-Index: 36
view all 6 authors...
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...
#1Mingliang XiongH-Index: 1
#2Mingqing LiuH-Index: 1
Last.Pengfei XiaH-Index: 13
view all 6 authors...
Resonant beam charging (RBC) can realize wireless power transfer (WPT) from a transmitter to multiple receivers via resonant beams. The adaptive RBC (ARBC) can effectively improve its energy utilization. In order to support multi-user 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 control, constan...
#1Qingqing ZhangH-Index: 2
#2Mingqing LiuH-Index: 1
Last.Pengfei XiaH-Index: 13
view all 6 authors...
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 resonant beam charging (ARBC) technology was introduced. In this paper, after analyzing the modular model of the ARBC system, we ...
#1Wen FangH-Index: 2
#2Qingqing ZhangH-Index: 2
Last.Pengfei XiaH-Index: 13
view all 5 authors...
Resonant Beam Charging (RBC) is a promising Wireless Power Transfer (WPT) technology to provide long-range, high-power, mobile and safe wireless power for the Internet of Things (IoT) 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 (CPS) and develop t...
#1Wen FangH-Index: 2
#2Qingqing ZhangH-Index: 2
Last.Pengfei XiaH-Index: 13
view all 5 authors...
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 multi-user 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 fa...
#1Wei WangH-Index: 12
#2Qingqing ZhangH-Index: 2
Last.Qingwen LiuH-Index: 11
view all 6 authors...
Power supply for Internet of Things (IoT) devices is one of the bottlenecks in IoT development. To provide perpetual power supply to IoT devices, resonant beam charging (RBC) is a promising safe, long-range and high-power wireless power transfer solution. How long distance can RBC reach and how much power can RBC transfer? In this paper, we analyze the RBC's consistent and steady operational conditions, which determine the maximum power transmission distance. Moreover, we study the power transmi...
#1Sai Jiang (Tongji University)
#2Qingqing Zhang (Tongji University)H-Index: 2
Last.Pengfei Xia (Tongji University)H-Index: 2
view all 6 authors...
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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