With the rapid advancement of information technology, the digital space has become humanity's “third living space.” However,this new space has also created security risks, exhibiting novel national security and ...With the rapid advancement of information technology, the digital space has become humanity's “third living space.” However,this new space has also created security risks, exhibiting novel national security and development-related characteristics. In such a context,digital sovereignty encompasses dominance over digital technologies,rule-making authority in the digital realm, a voice in the digital space,and the right to develop the digital economy. Many countries and regions worldwide, such as the United States, the European Union, and China,have placed extreme importance on digital sovereignty, as evidenced by their adoption of relevant strategies. China faces four barriers that hinder its efforts to enhance digital sovereignty: path dependence,technology maturity, generalized functional security, and energy consumption. China urgently needs to promote information technology innovation at the paradigm level, facilitate much-needed breakthroughs in ground-breaking technologies, and build an independent knowledge system with Chinese characteristics regarding the digital space. Only in this manner can China forge a new path of digitalization to consolidate its digital sovereignty and advance its modernization.展开更多
To improve and optimize the bandwidth utilization for multi-service packet transporting system, a kind of Dynamic Full Bandwidth Utilized (DFBU) allocation algorithm allowing a single link to use far beyond its fair s...To improve and optimize the bandwidth utilization for multi-service packet transporting system, a kind of Dynamic Full Bandwidth Utilized (DFBU) allocation algorithm allowing a single link to use far beyond its fair share bandwidth is presented. Three important parameters as the bound on max and minimum bandwidth, the maximum packet delay and the minimum bandwidth utilization are discussed and analyzed. Results of experiments show that the DFBU-algorithm is capable of making a single link in the system use all the spare bandwidth (up to full-bandwidth) while the performance of fairness and QoS requirement is still guaranteed.展开更多
A kind of packet labeling algorithm for autonomous system is introduced. The fairness of the algorithm for each traffic stream in the integratedservices is analyzed. It is shown that the rate of each stream in the int...A kind of packet labeling algorithm for autonomous system is introduced. The fairness of the algorithm for each traffic stream in the integratedservices is analyzed. It is shown that the rate of each stream in the integratedservices would converge to a stable value if the transmitting or forwarding rates converge to that of the receiving exponentially.展开更多
A Single-Buffered (SB) router is a router where only one stage of shared buffering is sand- wiched between two interconnects in comparison of a Combined Input and Output Queued (CIOQ) router where a central switch fab...A Single-Buffered (SB) router is a router where only one stage of shared buffering is sand- wiched between two interconnects in comparison of a Combined Input and Output Queued (CIOQ) router where a central switch fabric is sandwiched between two stages of buffering. The notion of SB routers was firstly proposed by the High-Performance Networking Group (HPNG) of Stanford Uni- versity, along with two promising designs of SB routers: one of which was Parallel Shared Memory (PSM) router and the other was Distributed Shared Memory (DSM) router. Admittedly, the work of HPNG deserved full credit, but all results presented by them appeared to relay on a Centralized Memory Management Algorithm (CMMA) which was essentially impractical because of the high processing and communication complexity. This paper attempts to make a scalable high-speed SB router completely practical by introducing a fully distributed architecture for managing the shared memory of SB routers. The resulting SB router is called as a Virtual Output and Input Queued (VOIQ) router. Furthermore, the scheme of VOIQ routers can not only eliminate the need for the CMMA scheduler, thus allowing a fully distributed implementation with low processing and commu- nication complexity, but also provide QoS guarantees and efficiently support variable-length packets in this paper. In particular, the results of performance testing and the hardware implementation of our VOIQ-based router (NDSC? SR1880-T? series) are illustrated at the end of this paper. The pro- posal of this paper is the first distributed scheme of how to design and implement SB routers publi- cized till now.展开更多
文摘With the rapid advancement of information technology, the digital space has become humanity's “third living space.” However,this new space has also created security risks, exhibiting novel national security and development-related characteristics. In such a context,digital sovereignty encompasses dominance over digital technologies,rule-making authority in the digital realm, a voice in the digital space,and the right to develop the digital economy. Many countries and regions worldwide, such as the United States, the European Union, and China,have placed extreme importance on digital sovereignty, as evidenced by their adoption of relevant strategies. China faces four barriers that hinder its efforts to enhance digital sovereignty: path dependence,technology maturity, generalized functional security, and energy consumption. China urgently needs to promote information technology innovation at the paradigm level, facilitate much-needed breakthroughs in ground-breaking technologies, and build an independent knowledge system with Chinese characteristics regarding the digital space. Only in this manner can China forge a new path of digitalization to consolidate its digital sovereignty and advance its modernization.
文摘To improve and optimize the bandwidth utilization for multi-service packet transporting system, a kind of Dynamic Full Bandwidth Utilized (DFBU) allocation algorithm allowing a single link to use far beyond its fair share bandwidth is presented. Three important parameters as the bound on max and minimum bandwidth, the maximum packet delay and the minimum bandwidth utilization are discussed and analyzed. Results of experiments show that the DFBU-algorithm is capable of making a single link in the system use all the spare bandwidth (up to full-bandwidth) while the performance of fairness and QoS requirement is still guaranteed.
文摘A kind of packet labeling algorithm for autonomous system is introduced. The fairness of the algorithm for each traffic stream in the integratedservices is analyzed. It is shown that the rate of each stream in the integratedservices would converge to a stable value if the transmitting or forwarding rates converge to that of the receiving exponentially.
基金the National High-Tech Research and De-velopment Program of China (863 Program) (2003AA103510, 2004AA103130, 2005AA121210).
文摘A Single-Buffered (SB) router is a router where only one stage of shared buffering is sand- wiched between two interconnects in comparison of a Combined Input and Output Queued (CIOQ) router where a central switch fabric is sandwiched between two stages of buffering. The notion of SB routers was firstly proposed by the High-Performance Networking Group (HPNG) of Stanford Uni- versity, along with two promising designs of SB routers: one of which was Parallel Shared Memory (PSM) router and the other was Distributed Shared Memory (DSM) router. Admittedly, the work of HPNG deserved full credit, but all results presented by them appeared to relay on a Centralized Memory Management Algorithm (CMMA) which was essentially impractical because of the high processing and communication complexity. This paper attempts to make a scalable high-speed SB router completely practical by introducing a fully distributed architecture for managing the shared memory of SB routers. The resulting SB router is called as a Virtual Output and Input Queued (VOIQ) router. Furthermore, the scheme of VOIQ routers can not only eliminate the need for the CMMA scheduler, thus allowing a fully distributed implementation with low processing and commu- nication complexity, but also provide QoS guarantees and efficiently support variable-length packets in this paper. In particular, the results of performance testing and the hardware implementation of our VOIQ-based router (NDSC? SR1880-T? series) are illustrated at the end of this paper. The pro- posal of this paper is the first distributed scheme of how to design and implement SB routers publi- cized till now.
