The smart vehicles are one of critical enablers for automated services in smart cities to provide intelligent transportation means without human intervention.In order to fulfil requirements,Vehicle-to-Anything(V2X)com...The smart vehicles are one of critical enablers for automated services in smart cities to provide intelligent transportation means without human intervention.In order to fulfil requirements,Vehicle-to-Anything(V2X)communications aims to manage massive connectivity and high traffic load on base stations and extend the range over multiple hops in 5G networks.However,V2X networking faces several challenges from dynamic topology caused by high velocity of nodes and routing overhead that degrades the network performance and increases energy consumption.The existing routing scheme for V2X networking lacks energy efficiency and scalability for high velocity nodes with dense distribution.In order to handle the challenges,this article proposes a scalable and energy-efficient routing scheme called Dynamic proactive reactive routing for 5G(DPR5)for high mobility speed and dense environment.As compared to existing schemes it uses a single routing table and efficiently minimizes the energy consumption in dense environment,improves node‘s lifetime upto 42%,and optimizes network performance by reducing the packet loss ratio upto 46%in a high velocity dense environment.展开更多
People and infrastructure in the Tibetan Plateau and surroundings(TPS)face an increasing risk from glacial lake outburst floods(GLOFs)as the construction boom in transport and hydropower infrastructure coincides with ...People and infrastructure in the Tibetan Plateau and surroundings(TPS)face an increasing risk from glacial lake outburst floods(GLOFs)as the construction boom in transport and hydropower infrastructure coincides with a sustained and regional increase in outburst frequency.We have compiled an inventory of GLOF events since 1900 in the TPS,an area that acts as a key engine of environmental change in Asia[1],and examined the evolution and impact of recent floods from the surging Shisper Glacier that have destroyed homes and highways and could continue for several more years.We conclude that this ongoing increase in both exposure and glacio-climatic hazard poses a significant threat to Asia’s economic development.展开更多
文摘The smart vehicles are one of critical enablers for automated services in smart cities to provide intelligent transportation means without human intervention.In order to fulfil requirements,Vehicle-to-Anything(V2X)communications aims to manage massive connectivity and high traffic load on base stations and extend the range over multiple hops in 5G networks.However,V2X networking faces several challenges from dynamic topology caused by high velocity of nodes and routing overhead that degrades the network performance and increases energy consumption.The existing routing scheme for V2X networking lacks energy efficiency and scalability for high velocity nodes with dense distribution.In order to handle the challenges,this article proposes a scalable and energy-efficient routing scheme called Dynamic proactive reactive routing for 5G(DPR5)for high mobility speed and dense environment.As compared to existing schemes it uses a single routing table and efficiently minimizes the energy consumption in dense environment,improves node‘s lifetime upto 42%,and optimizes network performance by reducing the packet loss ratio upto 46%in a high velocity dense environment.
基金supported by the Second Tibetan Plateau Scientific Expedition and Research Program(2019QZKK0603)the National Natural Science Foundation of China(41971153 and 42171086)+1 种基金the Science and Technology Department of Tibet Program(XZ202301ZY0016G)the Chinese Committee on International Centre for Integrated Mountain Development(CNICIMOD)。
文摘People and infrastructure in the Tibetan Plateau and surroundings(TPS)face an increasing risk from glacial lake outburst floods(GLOFs)as the construction boom in transport and hydropower infrastructure coincides with a sustained and regional increase in outburst frequency.We have compiled an inventory of GLOF events since 1900 in the TPS,an area that acts as a key engine of environmental change in Asia[1],and examined the evolution and impact of recent floods from the surging Shisper Glacier that have destroyed homes and highways and could continue for several more years.We conclude that this ongoing increase in both exposure and glacio-climatic hazard poses a significant threat to Asia’s economic development.
