scholarly journals Survivable Virtual Network Link Protection Method Based on Network Coding and Protection Circuit

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 67477-67493 ◽  
Author(s):  
Yuze Su ◽  
Xiangru Meng ◽  
Qiaoyan Kang ◽  
Xiaoyang Han
Keyword(s):  
Network Coding ◽  
Virtual Network ◽  
Protection Method ◽  
Network Link ◽  
Protection Circuit ◽  
Link Protection

scholarly journals Survivable Virtual Network Link Shared Protection Method Based on Maximum Spanning Tree

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 92137-92150 ◽  
Author(s):  
Xiaoyang Han ◽  
Xiangru Meng ◽  
Qiaoyan Kang ◽  
Yuze Su
Keyword(s):  
Spanning Tree ◽  
Virtual Network ◽  
Shared Protection ◽  
Protection Method ◽  
Network Link ◽  
Maximum Spanning Tree

scholarly journals Failure Recovery In SDN: A Segment Routing Based Link Protection Approach

2021 ◽  
Author(s):  
Mirja Shahriar Enan
Keyword(s):  
Computer Network ◽  
Complex Structure ◽  
Failure Recovery ◽  
Total Recovery ◽  
Protection Mechanism ◽  
Fine Grained ◽  
Memory Efficiency ◽  
Protection Method ◽  
Local Recovery ◽  
Link Protection

The present computer network has been evolved into a complex structure with a growing challenge to manage and scale modern day’s requirements. A new approach to tackle these difficulties is SDN, which empowers network with programmability and is designed to perform fine grained traffic forwarding decisions. However, similar to the need of traditional networks, fault tolerance is necessary to achieve high availability. In this thesis, we propose a link protection method based on the Segment Routing (SR) for rapid failure recovery in OpenFlow based SDN. Our proposed scheme performs local recovery at the switch level without the controller intervention, thus significantly reducing the total recovery time. Additionally, it reduces initial load on the controller while proactively computing the backup paths by minimizing the algorithm complexity. Moreover, memory efficiency is achieved by using a per-link protection with aggregated flow rules instead of traditional per-flow based protection mechanism. In Segment Routing, we may encounter the limitation on the size of the label stack, known as Segment List Depth (SLD). Therefore, we also propose an efficient label encoding algorithm to mitigate the SLD impact.

scholarly journals Failure Recovery In SDN: A Segment Routing Based Link Protection Approach

2021 ◽  
Author(s):  
Mirja Shahriar Enan
Keyword(s):  
Computer Network ◽  
Complex Structure ◽  
Failure Recovery ◽  
Total Recovery ◽  
Protection Mechanism ◽  
Fine Grained ◽  
Memory Efficiency ◽  
Protection Method ◽  
Local Recovery ◽  
Link Protection

The present computer network has been evolved into a complex structure with a growing challenge to manage and scale modern day’s requirements. A new approach to tackle these difficulties is SDN, which empowers network with programmability and is designed to perform fine grained traffic forwarding decisions. However, similar to the need of traditional networks, fault tolerance is necessary to achieve high availability. In this thesis, we propose a link protection method based on the Segment Routing (SR) for rapid failure recovery in OpenFlow based SDN. Our proposed scheme performs local recovery at the switch level without the controller intervention, thus significantly reducing the total recovery time. Additionally, it reduces initial load on the controller while proactively computing the backup paths by minimizing the algorithm complexity. Moreover, memory efficiency is achieved by using a per-link protection with aggregated flow rules instead of traditional per-flow based protection mechanism. In Segment Routing, we may encounter the limitation on the size of the label stack, known as Segment List Depth (SLD). Therefore, we also propose an efficient label encoding algorithm to mitigate the SLD impact.

CAD Of Anticorrosive Protection Of Steel Structures

2019 ◽  
pp. 18-23
Keyword(s):  
Protective Coating ◽  
Computer Aided Design ◽  
Steel Structures ◽  
Cost Effective ◽  
Operating Conditions ◽  
Computational Tool ◽  
Protection Method ◽  
Cost Effective Method ◽  
The Cost ◽  
Aided Design

The choice of cost-effective method of anticorrosive protection of steel structures is an urgent and time consuming task, considering the significant number of protection ways, differing from each other in the complex of technological, physical, chemical and economic characteristics. To reduce the complexity of solving this problem, the author proposes a computational tool that can be considered as a subsystem of computer-aided design and used at the stage of variant and detailed design of steel structures. As a criterion of the effectiveness of the anti-corrosion protection method, the cost of the protective coating during the service life is accepted. The analysis of existing methods of steel protection against corrosion is performed, the possibility of their use for the protection of the most common steel structures is established, as well as the estimated period of effective operation of the coating. The developed computational tool makes it possible to choose the best method of protection of steel structures against corrosion, taking into account the operating conditions of the protected structure and the possibility of using a protective coating.

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