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Currently deployed backbone/metro networks rarely supports dynamically configurable multicasting. One of the major reasons is the high complexity and low scalability of current multicasting solutions. Alternative multicasting solutions are emerging based on Software Defined Networking (SDN), indeed, using a central controller simplifies the multicast tree management but still requires the explicit...
In enterprise networks, policies (e.g., QoS or security) are often defined based on the categorization of hosts along dimensions, such as the organizational role of the host (faculty versus student) and department (engineering versus sales). While current best practices (virtual local area networks) help when hosts are categorized along a single dimension, policy may often need to be expressed along...
Prevailing network technologies separate control and data planes embedded within networking devices. Problems with this are expensive maintenance of closed-technology network devices and the inability to enforce coherent network-wide policies. Software Defined Networks (SDN) solves these problems with logical centralization based on open standards that use existing networking equipment. Quality of...
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...
We demonstrate experimentally how an Autonomic Network based on the CPN protocol can provide the Quality of Service (QoS) required by voice communications. The implementation uses Reinforcement Learning to dynamically seek paths that meet the quality requirements of voice communications. Measurements of packet delay, jitter, and loss illustrate the performance obtained from the system.
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 (SDN) is a promising step towards the future network. But, it still has some issue regarding the security. One of the security issues is the augmented impact of Denial of Service (DoS) attacks. In this paper, we create an application on the top of Beacon controller to mitigate the DoS attacks in the OpenFlow networks. The attacks include IP/MAC Spoofing and Bulky/Garbage...
Under the OTT threat, a telecom call-based ICT integration approach is studied to alleviate the revenue shrinkage. The CT-initiated IT services are thereby proposed to maintain existing telecom call service while adding OTT-like communication features on Internet. To do this, an IMS-based ICT service infrastructure is developed and the OpenFlow Controller is incorporated. Under such infrastructure...
Cloud computing data centers are becoming increasingly popular for the provisioning of computing resources. In the past, most of the research works focused on the effective use of the computational and storage resources by employing the Virtualization technology. Network automation and virtualization of data center LAN and WAN were not the primary focus. Recently, a key emerging trend in Cloud computing...
IP multicast suffers from scalability and QoS provisioning problems when supporting large scale group communication cross domain. To solve the problems, we propose WSCT-PAN, a per-access-network based wide-sense circuit tree transmission scheme, in which one Wide-Sense Circuit Tree (WSCT) is established for a class of multicast traffic per access network. By using mapping and label switching, multiple...
Traditional multicast protocol forms multicast trees rooted at different sources to forward packets. If the multicast sources and receivers are in different domains, these trees will produce a great number of multicast states in the backbone, resulting in poor scalability. Therefore, we propose a one Wide-Sense Circuit Tree per Traffic Class based inter-domain multicast (WSCT-TC), in which a Wide-Sense...
The objective of this paper is to define a mathematic model for the dimensioning of LTE Rel-8 network. After describing the mechanisms influencing the dimensioning such us the Scheduling, QOS and LTE capacity, we define the strategy of the planning and the objective function which aim to minimize the number of the base stations and the capacities of the wired links to deploy. The mathematical formulation...
The concept of network virtualization offers the promising possibility for parallel deployment of network solutions that can be based on different protocol stacks. The way of implementation of network virtualization plays essential role in deployment of the mentioned concept. This paper proposes a novel solution for implementation of the IPv6 QoS System in the virtualized environment. This system...
Network virtualization in cloud computing environment has attracted many attentions recently. With the help of network virtualization, VMM is able to provide fine-grained isolation among different VMs. However, the performance and overhead introduced by network virtualization is also important concerns when applying network virtualization to the cloud computing environment. In this paper, we evaluated...
With the description of tGPON and qos principle, we introduce the flow classification technology and speed limit method to implement QoS and put the implementation way and workflow. Then we introduce the experiment steps and the result and give related analysis.
We propose Energy Watermark Algorithm (EWA), an adaptive algorithm to reduce power consumption in Internet Protocol (IP)-over-Wavelength Division Multiplexing (WDM) networks. Our solution wisely adapts the set of powered on line cards to the actual traffic demand. In particular, EWA trades between network power consumption and Quality of Service (QoS) by changing the level of overprovisioning of the...
The Differentiated Services architecture represents a highly scalable architecture for deployment of Quality of Services across the next-generation Internet. The Differentiated Services enable the packets that pass through network devices operating on layer 3 information, such as routers, to have their relative priority differentiated from one another. With Differentiated Services marking, Layer 3...
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