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Software-defined networking (SDN) has separated control and forwarding planes, which is a powerful approach to enable network virtualization by SDN hypervisors to share physical SDN networks among multiple virtual SDN in cloud data center. However, the centralized control and virtual network shared physical network are delicately weak and easy to failure if virtual topology embedding is not properly...
This paper presents an adaptive service management mechanism that maintains service level agreement through use of overlay networks that are deployed over the cloud provider network. The application autonomic manager strives to maintain the SLA without provisioning new resources for as long as possible. Through continuous monitoring and analysis, autonomic manager uses software defined networking...
Software-defined networking (SDN) is used commercially to improve network agility and traffic management capability. As deployed and tactical military systems are often constrained by network performance it is vital to quantify the performance impact of the SDN control plane if SDN is to be exploited in this environment. To assess this we identify the key types of messages used in OpenFlow and how...
Supporting end-to-end quality of services for real-time interactive video applications such as videoconferencing and distance learning across the Internet requires a collection of independent networks or domains to work together to route packets between source and destination. Routing packets across the Internet using a feasible path - a path that meets the quality of service (QoS) attributes of video...
Multipath forwarding consists of using multiple paths simultaneously to transport data over the network. While most such techniques require endpoint modifications, we investigate how multipath forwarding can be done inside the network, transparently to endpoint hosts. With such a network-centric approach, packet reordering becomes a critical issue as it may cause critical performance degradation....
This paper is devoted to the development of the extended multi-commodity flow model in order to provide optimal routing based on the criteria of quality of service and minimal maximal channel utilization. Since most of the models consider these criteria separately and do not consider different requirements of flows to quality of service, the proposed model allows to close this gap by allowing to achieve...
The complexity of network routing infrastructures is increased dramatically. To tackle this issue, a promising state-of-the-art paradigm called software defined networking (SDN) is introduced. Due to the differences in the network requirements of applications, QoS-aware routing plays an important role in the networks. Recent proposed resource allocation algorithms focus on the current traffic matrix...
In this paper, we analyze flow-based routing schemes in SDN. Specifically, we study the flow-based routing performance; combining the knowledge of the link condition and updating the period for calculating the path. The framework uses centralized control of SDN where the SDN controller calculates available paths to determine the routing policy based on a global knowledge network. This flow-based routing...
Software Defined Networking (SDN) is emerging as a new paradigm in which the control plane is decoupled from the data plane. SDN is an enabler of network control to become directly programmable. The underlying infrastructure can be abstracted from applications and network services. Recently, SDN has rapidly expanded and attracted many research efforts. In the open literature, analytical tools have...
In this paper, we propose a new routing algorithm which calculates bandwidth-delay constrained routes in the fast and efficient manner. The algorithm is designed for the software-defined backbone networks, where the control plane is separated from the data plane and logically centralized. Besides providing the required quality of service (QoS), the algorithm aims to maximize utilization of network...
Multipath TCP is an extension to TCP protocol that allows a single connection to be split across multiple paths. MPTCP overcomes few limitations of TCP thereby offering added benefits like increased throughput and network resource utilization and resilience to possible link failures. Different data paths over the network face different end-to-end path delay. The performance of MPTCP is affected not...
This paper presents a scalable solution for guaranteeing bandwidth to interactions/communications assuming no information is provided by the applications. The objective is to define and assess what the network can do with so little information both in terms of guaranteeing quality and preventing being throttled by overloads. The suggestion of having applications indicating their needs did not materialize...
In this paper we analyzed suitability of different routing algorithms for establishing bandwidth-delay constrained traffic tunnels in SDN backbone networks. Bandwidth rejection ratio was used as indicator of algorithm's ability to efficiently utilize network resources. Through set of simulations on two real backbone topologies we showed that network topology can affect algorithm's performance, and...
The problem of path optimization and k disjoint pairs are important in survivable, QoS-aware communication network and SDN controlled networks. While the problem of optimally solving for maximally link-disjoint path pairs have always received a good level of attention, more work is needed with respect to k-maximally disjoint, multi-constrained, multiple QoS link weights route provisioning, and efficient...
MapReduce has been widely adopted as a programming model to process big data. However, parallel jobs in MapReduce are prone to be plagued by stragglers caused by non-local tasks for two reasons: first, system logs from production clusters show that a non-local task can be two times slower than a local task, second, a job's completion time is bottlenecked by its slowest parallel tasks. As a result,...
Software-Defined Networking (SDN) permits centralizing part of the decision-logic in controller devices. Thus, controllers can have an overall view of the network, assisting network programmers to configure network-wide services. Despite this, the behavior of network devices and their configurations are often written for specific situations directly in the controller. As an alternative, techniques...
This paper presents VLM+, a Virtual Link (VL) Embedding algorithm supporting Quality of Service (QoS). VLM+ has been developed evolving its Mixed Integer Programming (MIP) based Virtual Link Mapping algorithm precursor (VLM), whose analytical model has been enhanced including the ability to fulfill VL end-to-end QoS requirements and to prioritise VL requests according to their QoS class or revenue...
In this paper, we propose an adaptive routing approach for video streaming with QoS (Quality of Service) support over Software Defined Networks (SDN), called ARVS. In our approach, base layer packets and enhancement layer packets of video bit streams are treated separately as two levels of QoS flows (level-1 and level-2 QoS flows). During video streaming, if the shortest path does not satisfy the...
The network resource allocation in SDN for control applications is becoming a key problem in the near future because of the conflict between the need of the flow-level flexibility control and the limited capacity of flow table. Based on the analysis of the difference of the definition of network resource between SDN and traditional IP network, the idea of the integrated allocation of link bandwidth...
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