The Wireless Identification and Sensing Platform (WISP) conjugates the identification potential of the rfid technology and the sensing and computing capability of the wireless sensors. Practical issues, such as the ne...
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The Wireless Identification and Sensing Platform (WISP) conjugates the identification potential of the rfid technology and the sensing and computing capability of the wireless sensors. Practical issues, such as the need of periodically recharging WISPs, challenge the effective deployment of large-scale rfid sensor networks (RSNs) consisting of rfid readers and WISP nodes. In this view, the paper proposes cooperative solutions to energize the WISP devices in a wide-area sensing network while reducing the data collection delay. The main novelty is the fact that both data transmissions and energy transfer are based on the rfid technology only: rfid mobile readers gather data from the WISP devices, wirelessly recharge them, and mutually cooperate to reduce the data delivery delay to the sink. Communication between mobile readers relies on two proposed solutions: a tag-based relay scheme, where rfid tags are exploited to temporarily store sensed data at pre-determined contact points between the readers;and a tag-based data channel scheme, where the WISPs are used as a virtual communication channel for real time data transfer between the readers. Both solutions require: (i) clustering the WISP nodes;(ii) dimensioning the number of required rfid mobile readers;(iii) planning the tour of the readers under the energy and time constraints of the nodes. A simulative analysis demonstrates the effectiveness of the proposed solutions when compared to non-cooperative approaches. Differently from classic schemes in the literature, the solutions proposed in this paper better cope with scalability issues, which is of utmost importance for wide area networks. (C) 2015 Elsevier B.V. All rights reserved.
A low-power system of rfid sensor networks was designed in this paper, which was used to solve the high energy consumption caused by collision. The architecture of rfid sensor networks based on intelligent node was us...
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ISBN:
(纸本)9781479979813
A low-power system of rfid sensor networks was designed in this paper, which was used to solve the high energy consumption caused by collision. The architecture of rfid sensor networks based on intelligent node was used in this system, and the intelligent node was composed of an rfid reader and a sensor node through the MCU of MSP430. The channel of WSN was utilized to control the reading of rfid system, which could reduce the collision of the system and improve the efficiency of reading, and then reduce the energy consumption of the system. Finally, the contrast of the simulation and the test analysis was given, which showed that the system has reached a low power requirements.
Running efficiency is an important factor to consider in order to avoid injury. In particular, foot pronation, the angle of the foot as it hits the ground, is a common cause for many types of injuries among runners. T...
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ISBN:
(纸本)9781605587486
Running efficiency is an important factor to consider in order to avoid injury. In particular, foot pronation, the angle of the foot as it hits the ground, is a common cause for many types of injuries among runners. Though pronation is common, diagnosing pronation is difficult and imprecise. Currently there is no method of diagonsis which can quantify the severity of pronation. In this paper we propose using WISP (Wireless Identification and Sensing Platform) sensors to help identify and quantify foot pronation.
Running efficiency is an important factor to consider in order to avoid injury. In particular, foot pronation, the angle of the foot as it hits the ground, is a common cause for many types of injuries among runners. T...
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ISBN:
(纸本)9781605585192
Running efficiency is an important factor to consider in order to avoid injury. In particular, foot pronation, the angle of the foot as it hits the ground, is a common cause for many types of injuries among runners. Though pronation is common, diagnosing pronation is difficult and imprecise. Currently there is no method of diagonsis which can quantify the severity of pronation. In this paper we propose using WISP (Wireless Identification and Sensing Platform) sensors to help identify and quantify foot pronation.
Internet of Things (IoT) is playing a more and more important role after its showing up, it covers from traditional equipment to general household objects such as WSNs and rfid. With the great potential of IoT, there ...
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Internet of Things (IoT) is playing a more and more important role after its showing up, it covers from traditional equipment to general household objects such as WSNs and rfid. With the great potential of IoT, there come all kinds of challenges. This paper focuses on the security problems among all other challenges. As IoT is built on the basis of the Internet, security problems of the Internet will also show up in IoT. And as IoT contains three layers: perception layer, transportation layer and application layer, this paper will analyze the security problems of each layer separately and try to find new problems and solutions. This paper also analyzes the cross-layer heterogeneous integration issues and security issues in detail and discusses the security issues of IoT as a whole and tries to find solutions to them. In the end, this paper compares security issues between IoT and traditional network, and discusses opening security issues of IoT.
Seatbelt state monitoring is important in intercity buses for passenger safety. This paper discusses the issues and challenges in power-saving design of radio frequency identification (rfid) sensornetworks in bus sea...
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Seatbelt state monitoring is important in intercity buses for passenger safety. This paper discusses the issues and challenges in power-saving design of radio frequency identification (rfid) sensornetworks in bus seatbelt monitoring. A new design approach is proposed in this work for low-power layout and parameter setting in rfidsensor nodes in hardware and software design. A one-to-many pairing registration method is suggested between the concentrator and the seat nodes. Unlike using extra computer software to write seat identification (ID) into an integrated circuit (IC) card, the node ID in this project can be stored into the concentrator directly, which can reduce intermediate operations and reduce development costs. The effectiveness of the proposed low-power design approach is verified by some experimental tests.
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