The mega-constellation is a major future development direction for space-based technologies in communications,navigation,remote sensing,and other fields.However,there are marked security threats to the mega-constellat...The mega-constellation is a major future development direction for space-based technologies in communications,navigation,remote sensing,and other fields.However,there are marked security threats to the mega-constellation.Traditional password-based security protection techniques are inefficient for vast node access authentication because they lack a unified management system and methodology.To address the aforementioned issues,this work presents a mega-constellation node security access authentication technique based on sharding blockchain via the“1+N+1”mega-constellation security and trustworthiness architecture.We build a distributed node security access authentication system based on functional domains and functional cross-domains,and we develop mathematical models for the complexity of messaging and space,the throughput of transactions,and the overall estimation of sharding blockchain systems.The results demonstrate that every indicator outperforms conventional blockchain techniques,which has major implications for mega-constellation by creating a complete link security and trustworthiness system.A universal solution for the number of consensus nodes I and the number of shards N is found,which can be used to guide parameter design in mega-constellation sharding blockchain systems.展开更多
An ATM ring switching testbed is proposed in this paper. Two practical applications for the ATMring exchange are aimed, one is used ai ATM LAM/MAN, another is for rural local ATM exchange. A dis-tributed swithching an...An ATM ring switching testbed is proposed in this paper. Two practical applications for the ATMring exchange are aimed, one is used ai ATM LAM/MAN, another is for rural local ATM exchange. A dis-tributed swithching and control architecture is designed. together with a modular and flexible hardware and soft-ware structure which permits a rapid and easy introduction and testing of new, services. Hierarchical VP and VCswitching is organized, three AALs (AAL1, AAL4 & AAL5) are supported to provide conaretion-oriented andconnectionless services Broadcasting, multicasting and multi-conferencing functions are achieved at no extra cost,and imerworking with the existing network is emphasized. The constucticon of ring access node is described. As anexample a PDH-ATM interface is given.展开更多
基金the specific grant from China’s National Social Science Foundation (U23B2025 and U22B2014).
文摘The mega-constellation is a major future development direction for space-based technologies in communications,navigation,remote sensing,and other fields.However,there are marked security threats to the mega-constellation.Traditional password-based security protection techniques are inefficient for vast node access authentication because they lack a unified management system and methodology.To address the aforementioned issues,this work presents a mega-constellation node security access authentication technique based on sharding blockchain via the“1+N+1”mega-constellation security and trustworthiness architecture.We build a distributed node security access authentication system based on functional domains and functional cross-domains,and we develop mathematical models for the complexity of messaging and space,the throughput of transactions,and the overall estimation of sharding blockchain systems.The results demonstrate that every indicator outperforms conventional blockchain techniques,which has major implications for mega-constellation by creating a complete link security and trustworthiness system.A universal solution for the number of consensus nodes I and the number of shards N is found,which can be used to guide parameter design in mega-constellation sharding blockchain systems.
文摘An ATM ring switching testbed is proposed in this paper. Two practical applications for the ATMring exchange are aimed, one is used ai ATM LAM/MAN, another is for rural local ATM exchange. A dis-tributed swithching and control architecture is designed. together with a modular and flexible hardware and soft-ware structure which permits a rapid and easy introduction and testing of new, services. Hierarchical VP and VCswitching is organized, three AALs (AAL1, AAL4 & AAL5) are supported to provide conaretion-oriented andconnectionless services Broadcasting, multicasting and multi-conferencing functions are achieved at no extra cost,and imerworking with the existing network is emphasized. The constucticon of ring access node is described. As anexample a PDH-ATM interface is given.
