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Packet Scheduling in Rechargeable Wireless Sensor Networks under sinr model

China Communications 2023年第3期20卷 286-301页

作者： Baogui Huang Jiguo Yu Chunmei Ma Guangshun Li Anming Dong School of Computer Science Qufu Normal UniversityRizhao 276826China Big Data Institute Qilu University of TechnologyJinan 250353China School of Computer Science and Technology Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

Two packet scheduling algorithms for rechargeable sensor networks are proposed based on the signal to interference plus noise ratio *** allocate different transmission slots to conflicting packets and overcome the challenges caused by the fact that the channel state changes quickly and is *** first algorithm proposes a prioritybased framework for packet scheduling in rechargeable sensor *** packet is assigned a priority related to the transmission delay and the remaining energy of rechargeable batteries,and the packets with higher priority are scheduled *** second algorithm mainly focuses on the energy efficiency of *** priorities are related to the transmission distance of packets,and the packets with short transmission distance are scheduled *** sensors are equipped with low-capacity rechargeable batteries,and the harvest-store-use model is *** consider imperfect *** is,the battery capacity is limited,and battery energy leaks over *** energy harvesting rate,energy retention rate and transmission power are *** simulation results indicate that the battery capacity has little effect on the packet scheduling ***,the algorithms proposed in this paper are very suitable for wireless sensor networks with low-capacity batteries.

关键词： packet scheduling physical interference model rechargeable sensor networks sinr model

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Distributed Consensus for Blockchains in Internet-of-Things Networks

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Tsinghua Science and Technology 2022年第5期27卷 817-831页

作者： Li Yang Yifei Zou Minghui Xu Yicheng Xu Dongxiao Yu Xiuzhen Cheng School of Computer Science and Technology Shandong UniversityQingdao 266237China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

In recent years,due to the wide implementation of mobile agents,the Internet-of-Things(IoT) networks have been applied in several real-life scenarios,servicing applications in the areas of public safety,proximity-based services,and fog ***,when more complex tasks are processed in IoT networks,demands on identity authentication,certifiable traceability,and privacy protection for services in IoT networks *** a blockchain system in IoT networks can greatly satisfy such ***,the blockchain building in IoT brings about new challenges compared with that in the traditional full-blown Internet with reliable transmissions,especially in terms of achieving consensus on each block in complex wireless environments,which directly motivates our *** this study,we fully considered the challenges of achieving a consensus in a blockchain system in IoT networks,including the negative impacts caused by contention and interference in wireless channel,and the lack of reliable transmissions and prior network *** proposing a distributed consensus algorithm for blockchains on multi-hop IoT networks,we showed that it is possible to directly reach a consensus for blockchains in IoT networks,without relying on any additional network layers or protocols to provide reliable and ordered *** our theoretical analysis,we showed that our consensus algorithm is asymptotically optimal on time complexity and is energy *** extensive simulation results also validate our conclusions in the theoretical analysis.

关键词： distributed algorithm consensus in blockchain Internet-of-Things(IoT) sinr model

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