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In order to evaluate the efficiency of system communication network in energy internet, the evaluation index system should be established firstly. There is no unified standard for the efficiency evaluation index system of complex power electronics system based on Software Defined Network (SDN) now. The function of SDN in complex power electronics system is introduced in this paper and the characteristics...
Providing the new power system with well-tailored communication architecture is a key factor to guarantee expected smart grid capabilities. Among many requirements, quality of service awareness is a relevant feature for the smart grid communication system. Indeed, various data flows are to be exchanged in order to ensure smart grid services, having each different resilience, bandwidth and latency...
Controller placement is an important problem in software-defined networks. If a controller fails, there may be no controller with enough spare capacity to serve switches of the failed controller, which leads to switches being disconnected from the controller. Even if there are controllers with enough spare capacity, reassigning switches of the failed controller may drastically increase the worst case...
Software Defined Networking (SDN), the novel paradigm of decoupling the control logic from packet forwarding devices, has been drawing considerable attention from both academia and industry. As the latency between a controller and switches is a significant factor for SDN, selecting appropriate locations for controllers to shorten the latency becomes one grand challenge. In this paper, we investigate...
Even after decades, the Internet does not provide Quality of Service (QoS) guarantee for the users. In order to soften such situation, clients negotiate Service Level Agreements (SLAs) with their Internet Service Providers (ISPs), where reliability and available bandwidth are key requirements for Internet services. On the other hand, the ISPs aim to decrease the energy consumption to deliver their...
The Internet is now present in our personal and professional life, where reliability and green communications are still open issues to be addressed. Usually, clients establish Service Level Agreements (SLAs) with their Internet Service Providers (ISPs), including parameters of reliability and bandwidth. On the other hand, the ISPs aim to maximize their profit by establishing as many SLAs as possible...
In traditional campus network, application-layer classification is often achieved by using specific devices that support application-layer classification. Since different vendors have different realizations, even the same flow may have different results with different devices. Thus it's hard to set a global consistent application-layer management policy for the whole network. The idea of separating...
In this paper, a potential threat to reliability of Software Defined Networking (SDN) is disclosed: the cascading failures of controllers. Current SDN designs have widely utilized multiple controllers and the load of a failed controller can be redistributed to the other controllers. However, simply utilizing multiple controllers cannot protect SDN networks from a single point of failure: the load...
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