通过使用SDN在雾计算中的基于卸载的MTC的延迟减少
Zahra Arefian1, Mohammad Reza Khayyambashi1, Naser Movahhedinia1
1Department of Computing Architecture, Faculty of Computer Engineering, University of Isfahan, Isfahan, Iran.
PloS one
|May 30, 2023
概括
雾计算 (FC) 与软件定义网络 (SDN) 结合,增强了机器类型通信的资源管理. 与传统的云计算相比,这种方法显著减少了延迟,并改善了延迟敏感流的服务.
科学领域:
- 计算机科学 计算机科学
- 网络化 网络化 网络化
- 分布式系统 分布式系统
背景情况:
- 雾计算 (FC) 将云计算功能扩展到更接近用户的用户,提高服务质量和减少延迟.
- 传统的云计算面临着高延迟和实时应用程序资源限制的挑战.
- 软件定义网络 (SDN) 为网络管理提供了一种灵活和可编程的方法.
研究的目的:
- 为高效的资源管理提出一个整合雾计算 (FC) 和软件定义网络 (SDN) 的框架.
- 在机器类型通信 (MTC) 中解决异质请求,优先考虑对延迟敏感的流程.
- 研究雾节点之间的流量卸载机制,以克服资源限制.
主要方法:
- 实施了一个结合FC和SDN的资源管理框架.
- 对于异质的MTC请求,应用优先级和差异流量空间分配.
- 模拟的雾节点使用队列理论和投票优先级算法来管理多队列系统.
- 使用SDN控制器进行智能流量卸载决策.
主要成果:
- 在处理对延迟敏感的流量方面取得了大约80%的改进.
- 减少了约65%的网络消耗.
- 与传统云计算相比,平均服务时间减少了约60%.
- 根据流量类型和任务卸载,证明了显著的延迟减少.
结论:
- 拟议的FC和SDN融合有效地管理了MTC的资源.
- 优先排队和流量卸载对于最小化雾环境中的延迟至关重要.
- 该框架为延迟敏感应用程序提供了与传统云计算相比的显著性能提升.
相关概念视频
Short-distance Transport of Resources
16.2K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
16.2K
Reducing Line Loss
180
In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss...
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss...
180
Load-frequency control
209
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
209
Distributed Loads: Problem Solving
680
Beams are structural elements commonly employed in engineering applications requiring different load-carrying capacities. The first step in analyzing a beam under a distributed load is to simplify the problem by dividing the load into smaller regions, which allows one to consider each region separately and calculate the magnitude of the equivalent resultant load acting on each portion of the beam. The magnitude of the equivalent resultant load for each region can be determined by calculating...
680
Distributed Loads
560
Distributed loads are a common type of load that engineers and scientists encounter in various practical situations. Distributed loads often refer to a type of load spread over a surface or a structure and can be modeled as continuous force per unit area.
For example, consider a bookshelf filled with books stacked vertically adjacent to each other. The weight of the books is evenly distributed over the length of the shelf. As a result, the pressure at different locations on the surface of the...
For example, consider a bookshelf filled with books stacked vertically adjacent to each other. The weight of the books is evenly distributed over the length of the shelf. As a result, the pressure at different locations on the surface of the...
560
Fast Decoupled and DC Powerflow
245
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
245


