To address the issues of head-of-line(HOL)blocking at the virtual output queue(VOQ)level,packet loss,and congestion spreading caused by buffer overflow in the shared-buffer-based combined input and output queued(CIOQ)...To address the issues of head-of-line(HOL)blocking at the virtual output queue(VOQ)level,packet loss,and congestion spreading caused by buffer overflow in the shared-buffer-based combined input and output queued(CIOQ)switching architecture,while enhancing its performance and stability,we propose a de-blocking adaptive feedback control(AFC)design in this study.The introduction of the credit timeout detection mechanism(CTDM)enables the CIOQ to achieve theoretical 100%non-blocking state,effectively eliminating the impact of HOL blocking.With the combined effect of the proposed VOQ dynamic regulation algorithm(VDRA)and threshold dynamic adaptive algorithm(TDAA),it can reduce the risk of congestion spreading caused by buffer overflow and consequently improve the overall performance of the system.Both theoretical analysis and experimental results demonstrate that,under typical traffic conditions,the proposed design achieves a maximum throughput of 1499.66 Gb/s and a minimum latency of 83 ns.Additionally,the effective throughput ratio reaches 96.94%,with a data link layer packet(DLLP)loss ratio of merely 0.61%and a packet loss rate as low as 0.6%.In comparison with traditional CIOQ and input queued(IQ)switch architectures,the proposed design demonstrates improvements in throughput by 15.12%and 20.55%,and forwarding latency is reduced by 26.9%and 54.7%,respectively,and the system stability is stronger,which can fully satisfy the demand for data exchange in complex situations.展开更多
Software-defined satellite networks(SDSNs)play an essential role in future networks.Due to the diverse service scenarios,SDSN faces the demand of packet processing for heterogeneous protocols.Existing packet switching...Software-defined satellite networks(SDSNs)play an essential role in future networks.Due to the diverse service scenarios,SDSN faces the demand of packet processing for heterogeneous protocols.Existing packet switching typically works on one single protocol.For protocol-heterogeneous users,existing packet switch architectures have to construct multiple protocol-specific switching instances,resulting in severe resource waste.In this article,we propose the heterogeneous protocol-independent packet switch architecture(HISA).HISA employs a fast parsing structure to achieve efficient heterogeneous packet parsing and a novel match-action pipeline to achieve shared packet processing among heterogeneous users.HISA can also support the online configuration of switching behaviors.Use cases illustrate the effectiveness of applying HISA in SDSN.Numerical results show that compared to existing packet switching,HISA can significantly improve the resource utilization of SDSN.展开更多
A novel optical burst switching （OBS） high speed network architecture has been proposed. To verify its feasibility and evaluate its performance, just-enough-time （JET） signaling has been considered as a high perfo...A novel optical burst switching （OBS） high speed network architecture has been proposed. To verify its feasibility and evaluate its performance, just-enough-time （JET） signaling has been considered as a high performance protocol. In the proposed architecture, to avoid burst losses, firstly, a short-prior- confirmation-packet （SPCP） is sent over the control channel that simulates the events that the actual packet will experience. Once SPCP detects a drop at any of the intermediate nodes, the actual packet is not sent but the process repeats. In order to increase network utilization, cost effectiveness and to overcome some limitations of conventional OBS, inherent codes （e.g., orthogonal optical codes （OOC））, which are codified only in intensity, has been used. Through simulations, it shows that a decrease in burst loss probability, cost effectiveness and a gain in processing time are obtained when optical label processing is used as compared with electronic processing.展开更多
In this paper, combining with active networks, we design a new kind of programmable routing switch architecture to provide a common intelligent switch platform for multi-protocol switching and multi-service accessing...In this paper, combining with active networks, we design a new kind of programmable routing switch architecture to provide a common intelligent switch platform for multi-protocol switching and multi-service accessing. We elaborate how programmable switch and network intelligence are achieved, and how packets are classified, queued and scheduled. We point out that edge intelligence and network software are the tendency for the development of future networks.展开更多
基金supported by the National Key Research and Development Program of China(No.2022YFB4500900).
文摘To address the issues of head-of-line(HOL)blocking at the virtual output queue(VOQ)level,packet loss,and congestion spreading caused by buffer overflow in the shared-buffer-based combined input and output queued(CIOQ)switching architecture,while enhancing its performance and stability,we propose a de-blocking adaptive feedback control(AFC)design in this study.The introduction of the credit timeout detection mechanism(CTDM)enables the CIOQ to achieve theoretical 100%non-blocking state,effectively eliminating the impact of HOL blocking.With the combined effect of the proposed VOQ dynamic regulation algorithm(VDRA)and threshold dynamic adaptive algorithm(TDAA),it can reduce the risk of congestion spreading caused by buffer overflow and consequently improve the overall performance of the system.Both theoretical analysis and experimental results demonstrate that,under typical traffic conditions,the proposed design achieves a maximum throughput of 1499.66 Gb/s and a minimum latency of 83 ns.Additionally,the effective throughput ratio reaches 96.94%,with a data link layer packet(DLLP)loss ratio of merely 0.61%and a packet loss rate as low as 0.6%.In comparison with traditional CIOQ and input queued(IQ)switch architectures,the proposed design demonstrates improvements in throughput by 15.12%and 20.55%,and forwarding latency is reduced by 26.9%and 54.7%,respectively,and the system stability is stronger,which can fully satisfy the demand for data exchange in complex situations.
基金supported by the National Natural Science Foundation of China(62101300,62341130)the Youth Fund Program of the Beijing National Research Center for Information Science and Technology under Grant BNR2021RC01012the Open Research Fund Program of the Beijing National Research Center for Information Science and Technology under Grant BNR2021KF02001.
文摘Software-defined satellite networks(SDSNs)play an essential role in future networks.Due to the diverse service scenarios,SDSN faces the demand of packet processing for heterogeneous protocols.Existing packet switching typically works on one single protocol.For protocol-heterogeneous users,existing packet switch architectures have to construct multiple protocol-specific switching instances,resulting in severe resource waste.In this article,we propose the heterogeneous protocol-independent packet switch architecture(HISA).HISA employs a fast parsing structure to achieve efficient heterogeneous packet parsing and a novel match-action pipeline to achieve shared packet processing among heterogeneous users.HISA can also support the online configuration of switching behaviors.Use cases illustrate the effectiveness of applying HISA in SDSN.Numerical results show that compared to existing packet switching,HISA can significantly improve the resource utilization of SDSN.
文摘A novel optical burst switching （OBS） high speed network architecture has been proposed. To verify its feasibility and evaluate its performance, just-enough-time （JET） signaling has been considered as a high performance protocol. In the proposed architecture, to avoid burst losses, firstly, a short-prior- confirmation-packet （SPCP） is sent over the control channel that simulates the events that the actual packet will experience. Once SPCP detects a drop at any of the intermediate nodes, the actual packet is not sent but the process repeats. In order to increase network utilization, cost effectiveness and to overcome some limitations of conventional OBS, inherent codes （e.g., orthogonal optical codes （OOC））, which are codified only in intensity, has been used. Through simulations, it shows that a decrease in burst loss probability, cost effectiveness and a gain in processing time are obtained when optical label processing is used as compared with electronic processing.
文摘In this paper, combining with active networks, we design a new kind of programmable routing switch architecture to provide a common intelligent switch platform for multi-protocol switching and multi-service accessing. We elaborate how programmable switch and network intelligence are achieved, and how packets are classified, queued and scheduled. We point out that edge intelligence and network software are the tendency for the development of future networks.
