Wireless Mesh Network (WMN) is a new-type wireless network. Its core idea is that any of its wireless equipment can act as both an Access Point (AP) and a router. Each node in the network can send and receive signals ...Wireless Mesh Network (WMN) is a new-type wireless network. Its core idea is that any of its wireless equipment can act as both an Access Point (AP) and a router. Each node in the network can send and receive signals as well as directly communicate with one or several peer nodes. One important issue to be considered in wireless Mesh networks is how to secure reliable data transmission in multi-hop links. To solve the problem, the 3GPP system architecture proposes two functionalities: ARQ and HARQ. This paper presents two HARQ schemes, namely hop-by-hop and edge-to-edge, and three ARQ schemes: hop-by-hop, edge-to-edge, and last-hop. Moreover, it proposes three solutions for WMNs from the perspective of protocol stock design: layered cooperative mechanism, relay ARQ mechanism and multi-hop mechanism.展开更多
In order to achieve an access to strain sensor data with wireless transmission in bridge engineering structure testing, a wireless strain test system is presented based on the resistance strain sensor of networks. The...In order to achieve an access to strain sensor data with wireless transmission in bridge engineering structure testing, a wireless strain test system is presented based on the resistance strain sensor of networks. The wireless bridge strain test system composed of master station and substation adopts the wireless method to realize the high accuracy data acquisition between the master station and the substation under a reliable communication protocol. The system has been tested in contrast with the present strain apparatus. Results show that the wireless system is high-reliable, and has many characteristics such as high efficiency, good precision, high stability with low cost, and good flexibility, without using the present communication network.展开更多
Near Field Communication(NFC)and Radio Frequency Identification(RFID)technologies offer wireless data transmission and energy supply for flexible wearable and implantable sensing systems.By eliminating bulky batteries...Near Field Communication(NFC)and Radio Frequency Identification(RFID)technologies offer wireless data transmission and energy supply for flexible wearable and implantable sensing systems.By eliminating bulky batteries or external wiring,these technologies significantly advance personalized medicine through wearable and implantable systems with reduced size,increased flexibility,and improved mechanical adaptability to the human body.This multidisciplinary research area encompasses the fundamental mechanisms of antenna theory,simulation&design,micro/nano-fabrication,and their biomedical applications.This review provides an overview of emerging wireless,personalized/decentralized biomedical devices focusing on NFC/RFID antennas design mechanisms,flexible NFC/RFID-based physical,chemical,and biosensors,as well as drug delivery implants.Moreover,challenges and future directions regarding flexible NFC/RFID-based systems are provided.Advancing this field will require collaborative efforts from researchers in antenna design,materials science,biology,and medical care,driving the development of NFC/RFID in biomedical applications.展开更多
文摘Wireless Mesh Network (WMN) is a new-type wireless network. Its core idea is that any of its wireless equipment can act as both an Access Point (AP) and a router. Each node in the network can send and receive signals as well as directly communicate with one or several peer nodes. One important issue to be considered in wireless Mesh networks is how to secure reliable data transmission in multi-hop links. To solve the problem, the 3GPP system architecture proposes two functionalities: ARQ and HARQ. This paper presents two HARQ schemes, namely hop-by-hop and edge-to-edge, and three ARQ schemes: hop-by-hop, edge-to-edge, and last-hop. Moreover, it proposes three solutions for WMNs from the perspective of protocol stock design: layered cooperative mechanism, relay ARQ mechanism and multi-hop mechanism.
基金Sponsored by the Multidisciline Scientific Research Foundation of Harbin Institute of Technology(Grant No.HIT.MD2003.14)the Scientific Research Foundation of Liaoning Provincial Communication Department(Grant No.200516)
文摘In order to achieve an access to strain sensor data with wireless transmission in bridge engineering structure testing, a wireless strain test system is presented based on the resistance strain sensor of networks. The wireless bridge strain test system composed of master station and substation adopts the wireless method to realize the high accuracy data acquisition between the master station and the substation under a reliable communication protocol. The system has been tested in contrast with the present strain apparatus. Results show that the wireless system is high-reliable, and has many characteristics such as high efficiency, good precision, high stability with low cost, and good flexibility, without using the present communication network.
基金the financial support from the National Natural Science Foundation of China(62235008)Natural Science Foundation for Excellent Young Scholars(62322108)+3 种基金National Key R&D Program of China under Grant(2021YFB3601200)Natural Science Foundation for Young Scholars(62201286,62301283,22405131)the Program of Jiangsu Specially-Appointed Professor,Jiangsu Funding Program for Excellent Postdoctoral Talent(2023ZB587)Nanjing U35 Program,Natural Science Research Start-up Foundation of Recruiting Talents of Nanjing University of Posts and Telecommunications(NY222099).
文摘Near Field Communication(NFC)and Radio Frequency Identification(RFID)technologies offer wireless data transmission and energy supply for flexible wearable and implantable sensing systems.By eliminating bulky batteries or external wiring,these technologies significantly advance personalized medicine through wearable and implantable systems with reduced size,increased flexibility,and improved mechanical adaptability to the human body.This multidisciplinary research area encompasses the fundamental mechanisms of antenna theory,simulation&design,micro/nano-fabrication,and their biomedical applications.This review provides an overview of emerging wireless,personalized/decentralized biomedical devices focusing on NFC/RFID antennas design mechanisms,flexible NFC/RFID-based physical,chemical,and biosensors,as well as drug delivery implants.Moreover,challenges and future directions regarding flexible NFC/RFID-based systems are provided.Advancing this field will require collaborative efforts from researchers in antenna design,materials science,biology,and medical care,driving the development of NFC/RFID in biomedical applications.
