Time Awareness in Software Defined Networking

2018

The ordeal which network operators face in implementing traditional network protocols has posed a great challenge to network management. As digital revolution of the world continues to transpire, demand has been placed on the exertion of high-level policies that will take network management to the next level. A new world of network programmability, software-defined networking (SDN), recommends the separation of the control plane and the data plane, enabling routers and switches to use information from the control plane to forward incoming traffic out the appropriate egress interface. SDN therefore provides a means for network virtualization. In this article, we present a review, which focuses on the concept of softwaredefined networking and the challenges for future networks. We also take a look at some issues currently being faced by SDN. In conclusion, a summary of the review is given, highlighting the need for SDN in a global world.

IEEE Communications Surveys & Tutorials, 2000

The idea of programmable networks has recently re-gained considerable momentum due to the emergence of the Software-Defined Networking (SDN) paradigm. SDN, often referred to as a "radical new idea in networking", promises to dramatically simplify network management and enable innovation through network programmability. This paper surveys the state-of-the-art in programmable networks with an emphasis on SDN. We provide a historic perspective of programmable networks from early ideas to recent developments. Then we present the SDN architecture and the OpenFlow standard in particular, discuss current alternatives for implementation and testing of SDN-based protocols and services, examine current and future SDN applications, and explore promising research directions based on the SDN paradigm. 3 and a secure channel to the controller. Ethane laid the foundation for what would become Software-Defined Networking. To put Ethane in the context of today's SDN paradigm, Ethane's identity-based access control would likely be implemented as an application on top of an SDN controller such as NOX [17], Maestro [21], Beacon [22], SNAC [23], Helios [24], etc.

IEEE Communications Magazine, 2013

Cloud services are exploding and organizations are converging their data centres in order to take advantage of the predictability, continuity, and quality of service delivered by virtualization technologies. In parallel, energy-efficient and high-security networking is of increasing importance. Network operators, service and product providers require a new network solution to efficiently tackle the increasing demands of this changing network landscape. Software-Defined Networking has emerged as an efficient network technology capable of supporting the dynamic nature of future network functions and intelligent applications while lowering operating costs through simplified hardware, software, and management. In this article, the question of how to achieve a successful carrier grade network with Software-Defined Networking is raised. Specific focus is placed on the challenges of network performance, scalability, security and interoperability with the proposal of potential solution directions.

Internet has led to the creation of a digital society, where everything is connected and is accessible from anywhere. However, despite their widespread usage, traditional IP networks are complex and very hard to manage. It is both difficult to configure the network according to defined policies, and to reconfigure it to respond to faults, loads and changes. To make matters even more difficult, current networks are also vertically integrated i.e. the control and data planes are combined. With the increasing demand, usage of bandwidth and frequency spectrum resources is beyond expectations. The frequency spectrum and network information have considerable relevance. Thus the spectrum utilization and channel flow interactions should be simultaneously considered. Software Defined Networking (SDN) has evolved to change this state of affairs, by breaking this vertical integration.

The Internet has led to the creation of a digital society, where (almost) everything is connected and is accessible from anywhere. However, despite their widespread adoption, traditional IP networks are complex and very hard to manage. It is both difficult to configure the network according to pre- defined policies, and to reconfigure it to respond to faults, load and changes. To make matters even more difficult, current networks are also vertically integrated: the control and data planes are bundled together. Software-Defined Networking (SDN) is an emerging paradigm that promises to change this state of affairs, by breaking vertical integration, separating the network’s control logic from the underlying routers and switches, promoting (logical) centralization of network control, and introducing the ability to program the network. The separation of concerns introduced between the definition of network policies, their implementation in switching hardware, and the forwarding of traffic, is key to the desired flexibility: by breaking the network control problem into tractable pieces, SDN makes it easier to create and introduce new abstractions in networking, simplifying network management and facilitating network evolution. In this paper we present a comprehensive survey on SDN. We start by introducing the motivation for SDN, explain its main concepts and how it differs from traditional networking, its roots, and the standardization activities regarding this novel paradigm. Next, we present the key building blocks of an SDN infrastructure using a bottom-up, layered approach. We provide an in-depth analysis of the hardware infrastructure, southbound and north- bound APIs, network virtualization layers, network operating systems (SDN controllers), network programming languages, and network applications. We also look at cross-layer problems such as debugging and troubleshooting. In an effort to anticipate the future evolution of this new paradigm, we discuss the main ongoing research efforts and challenges of SDN. In particular, we address the design of switches and control platforms – with a focus on aspects such as resiliency, scalability, performance, security and dependability – as well as new opportunities for carrier transport networks and cloud providers. Last but not least, we analyze the position of SDN as a key enabler of a software-defined environment.

The Internet has led to the creation of a digital society, where (almost) everything is connected and is accessible from anywhere. However, despite their widespread adoption, traditional IP networks are complex and very hard to manage. It is both difficult to configure the network according to predefined policies, and to reconfigure it to respond to faults, load and changes. To make matters even more difficult, current networks are also vertically integrated: the control and data planes are bundled together. Software-Defined Networking (SDN) is an emerging paradigm that promises to change this state of affairs, by breaking vertical integration, separating the network's control logic from the underlying routers and switches, promoting (logical) centralization of network control, and introducing the ability to program the network. The separation of concerns introduced between the definition of network policies, their implementation in switching hardware, and the forwarding of traffic, is key to the desired flexibility: by breaking the network control problem into tractable pieces, SDN makes it easier to create and introduce new abstractions in networking, simplifying network management and facilitating network evolution.

Sensors, 2020

The Internet of Things (IoT) connects smart devices to enable various intelligent services. The deployment of IoT encounters several challenges, such as difficulties in controlling and managing IoT applications and networks, problems in programming existing IoT devices, long service provisioning time, underused resources, as well as complexity, isolation and scalability, among others. One fundamental concern is that current IoT networks lack flexibility and intelligence. A network-wide flexible control and management are missing in IoT networks. In addition, huge numbers of devices and large amounts of data are involved in IoT, but none of them have been tuned for supporting network management and control. In this paper, we argue that Software-defined Networking (SDN) together with the data generated by IoT applications can enhance the control and management of IoT in terms of flexibility and intelligence. We present a review for the evolution of SDN and IoT and analyze the benefits...

Sensors

MQTT is one of the most popular application-layer protocols used in the scope of the Internet-of-Things (IoT) and Industrial-Internet-of-Things (IIoT), given its suitability for resource-constrained embedded systems. However, MQTT Quality-of-Service policies do not support timeliness requirements, which is common in IIoT. The literature reports several research works that address this limitation, but they are limited in scope (e.g., improvements in the broker’s internal operation, control of the publisher’s data rate, and path optimizations). Conversely, this paper presents a comprehensive architectural approach, proposing a set of extensions to the MQTT protocol that allow applications to explicitly specify real-time requirements and instantiate corresponding network reservations to enforce the desired temporal behavior. Such reservations are enforced via Software Defined Networking, specifically the OpenFlow protocol, but other protocols that allow bandwidth reservations, e.g., TS...

2014

In 2013, the IEEE Future Directions Committee (FDC) formed an SDN work group to explore the amount of interest in forming an IEEE Software-Defined Network (SDN) Community. To this end, a Workshop on “SDN for Future Networks and Services” (SDN4FNS’13) was organized in Trento, Italy (Nov. 11-13 2013). Following the results of the workshop, in this paper, we have further analyzed scenarios, prior-art, state of standardization, and further discussed the main technical challenges and socio-economic aspects of SDN and virtualization in future networks and services. A number of research and development directions have been identified in this white paper, along with a comprehensive analysis of the technical feasibility and business availability of those fundamental technologies. A radical industry transition towards the “economy of information through softwarization” is expected in the near future. Keywords—Software-Defined Networks, SDN, Network Functions Virtualization, NFV, Virtualizatio...

Global journal of computer science and technology, 2018

Software Defined Networking (SDN) promises to provide a powerful way to introduce Quality of Service (QoS) concepts in today’s communication networks. In SDN the behavior and the functionality of the network devices is programmatically modified using a single high-level program. Software Defined Networking (SDN) instantiation OpenFlow is designed according to these properties. The realization of the Quality of Service (QoS) concepts becomes understandable with SDN in a convenient way. This paper focuses on the existing architectures parameters such as response time, switch capacity and bandwidth isolation and we evaluate these parameters here. Although concepts of QoS are well researched, it is hard to understand that due to high implementation complexity and realization costs. OpenFlow as the best-known SDN standard so far defines a standard protocol for network control. These observations of switch variety may provide SDN application developer’s insights when realizing QoS concept...