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This paper proposes a method of TCP multi-pathization for IoT network by SDN. The method distributes packets according to the congestion between paths and IP packet length. Since it is performed over SDN, no changes of existing protocols and devices are required. The authors implement the method by actual IoT devices and evaluate QoS by experiment. The results of the experiment show that the TCP throughput...
Most of IoT applications include large number of distributed sensors which are interesting in specific geographical area. A large number of IoT entities have multiple relations and dynamic connections with each other. And there are many group communication requirements. Flexible multicast mechanism will be essential in such environments but it is difficult to satisfy verious requirements by means...
The paper proposes to use a solution based on software-defined networks (SDN) to control traffic flows in wireless local area networks (Wi-Fi). The paper examines the testing methods for a software-configurable wireless local area network based on the model network of the St. Petersburg State University of Telecommunications. Classify traffic based on DSCP values in the IP-headers of packets. After...
Medical applications, along with Information and Communication Technology (ICT), have contributed with many solutions to support the treatment of SEPSIS. However, there are few solutions for the transport of sepsis data with Quality of Service (QoS). In this paper we propose a self-manageable architecture for the provision and delivery of sepsis data using Software-Defined Networking (SDN). To evaluate...
Mesh networks provide natural link and node fault tolerance and load balancing characteristics. However, existing solutions for real-time flow allocation seldom utilize those advantages. This paper deals with the real-time flow allocation problem in mesh networks. The objective is to find the suitable path under delay constraint while allowing load balancing. For this purpose, combined online flow...
In this work, we propose OpenSched, a layered architecture that glues the QoS apps, the controller and the switches together to maximally unleash the power of centralized QoS control. Specifically, our design consists of (1) a flexible northbound interface via the ``builder pattern'', (2) one-to-many controller-switch interactions via device abstraction, thread pooling and Java NIO's selector mechanism,...
Using the cloud for software defined networks opens new possibilities for the organization of computing processes of network controllers. The article considers the possibility of using an “endless train” method for virtualization of individual functional opportunities of SDN OpenDayLight controller. This method allows organizing controller computer processes caused by the need to serve the dynamically...
Quality of Service (QoS) control is an important concept in computer networking, as it is related to end-user experience. While providing QoS guarantees over the Internet has long been deemed too complicated, the emergence of Software Defined Networking (SDN), and OpenFlow as its most popular standard, may facilitate QoS control. In this paper, we consider how to enable bandwidth guarantees with OpenFlow...
The paper describes a management model where a service provider (SP) maintains multiple protocol modules to exercise the infrastructure resources (e.g., bandwidth, storage, servers) under various environment conditions. Each protocol depicts a distinctive work-flow among the networked entities (i.e., message exchanges and task coordination), incurring a certain amount of resource use. Different levels...
Aware of the benefits that Software-Defined Networking (SDN) can entail for traffic engineered services, the pan-European National Research and Education Network (NREN) Géant has started to work on an SDN-based solution to provide Bandwidth on Demand (BoD) services. The proposed solution relies on a framework called DynPaC, which is able to provide resilient L2 services taking into account bandwidth...
Direct (or D2D) communications allow two UEs to communicate without passing through the eNodeB. However, the two UEs may still need to relay their communication through the eNB from time to time, hence should be able to switch from the direct to the re-layed mode seamlessly, without this affecting the QoS. In this paper we show that in conventional systems a mode switching may cause relevant losses,...
Information-Centric Networks (ICN) is a communication paradigm that promises to transfer the Internet from a host-to-host communication network to a massive information delivery system, capable of supporting the future needs of the users. ICNs are based on three main concepts: content forwarding, in-network caching, and multicasting. To realize these three key concepts, Software-Defined Networking...
This paper presents an upgrade for OpenFlow 1.0 extension module [1]. The new module developed for the simulation of OpenFlow 1.3 based networks with OMNeT++, a well-known, widely-used modular simulation framework, which offers a high degree of experiment support. It focuses mainly on modelling the OpenFlow switch and controller with a particular attention on the aspects related to support load balancing,...
Virtual Network (VN) bandwidth guarantee is an important issue in scenarios such as enterprise network and multi-tenant datacenter. The Software Defined Network (SDN) is sophisticated technology for network control and management. In this paper we proposed a VN bandwidth guarantee method which use SDN controller and Open vSwitch to allocate the available bandwidth by VN's priority. According to simulation...
In spite of their rapid growth, cloud applications still heavily rely on the network communication infrastructure, whose stability and latency directly affect the quality of experience. In fact, as mobile devices need to rapidly get real-time information and files from the cloud, it becomes an extremely important factor for cloud providers to deliver a better user experience. In this paper, we specify...
Mobile data traffic has increased drastically during last few years and expected to increase multifold in the coming years. Heterogeneous wireless networks have made it possible to have simultaneous traffic flows on all available wireless accesses. IP Flow Mobility (IFOM) which has been standardized from 3GPP Release 10 provides possibility to seamlessly transfer individual flows from one access to...
Data traffic in Mobile networks is increasing exponentially since last few years and is projected to increase multifold before the end of this decade. Evolution in heterogeneous wireless networks and network based mobility protocols has enabled the usage of simultaneous traffic flows on all available wireless accesses. Standardization of IP Flow Mobility (IFOM) from 3GPP Release 10 provides possibility...
Software Defined Networking decouples network services from the underlying physical hardware, thus agile and secure networks can be build, moved, replaced, and programmatically provided on demand. However, the full range of Software Defined Networking capabilities is not utilized in today's cloud middle wares, especially dynamic Quality of Service enforcement for cloud networks. In this paper we combine...
Due to the partition/aggregate nature of many cloud applications, incast traffic is preponderant in data center networks (DCNs). Because TCP is agnostic to this composite nature of the applications traffic and their quality of service requirements, a few congestion events often degrade significantly the user perceived quality of service. This is exacerbated by the co-existence of such incast traffic...
Avionics full duplex switched Ethernet (AFDX) is a time-critical network for aeronautical communications. Based on the static routing configuration of the virtual links (VL), real-time packets can be transmitted before their deadlines through AFDX. The next generation aeronautical communication environment comprises of multiple networks and service providers. Packets transmitted in AFDX may be changed...
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