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The Ethernet VPN (EVPN) technology has emerged as a key solution for the interconnection of geo-distributed Data Centers (DCs) over provider-managed MPLS networks. Such interconnections need to satisfy service-level agreements, which can be achieved by enforcing Traffic Engineering (TE) policies. However, deploying an effective TE policy is challenging and complex. This stems from the fact that network...
Ethernet based secure VPLS (Virtual Private LAN Services) networks require to establish full mesh of VPLS tunnels between the customer sites. However, the tunnel establishment between geographically distant customer sites introduces a significantly high delay to the user traffic transportation.In this article, we propose a novel fast transmission mechanism for secure VPLS architectures to reduce the...
Content Delivery Networks (CDNs) are able to improve user-oriented application performance through caching and anycast routing or DNS-based user mapping mechanism. With the fact that BGP is widely used for inter autonomous system (AS) routing for CDNs, there is a middle mile bottleneck problem, which cause by the nature limitation of BGP. To solve this problem, we propose an SDN-based tunnel multi-path...
Software-Defined Networking (SDN) can be applied for managing application flows dynamically by a logically centralized SDN controller and SDN switches. Because SDN switch only support a few thousand installations of a forwarding rule per second, its poor performance becomes a bottleneck for dynamic and scalable application flow management. For this reason, reducing the number of flows is needed to...
Flat layer-2 large-scale network (FLATLANd) is a novel design for a telecommunications architecture that is strictly flat and conducts traffic at layer 2 without the use of tunneling, VPNs, or labels. The architecture is inherently open access in that no one network or service provider dominates over the others, as is the case in traditional wholesale and retail models for broadband access networks...
Voice transmission over the internet is the fundamental requirement of every organization. As a result various technologies have been introduced for the reliable transmission of voice over internet. Voice over Internet Protocol (VoIP) has emerged as a need for improvement of quality for a voice call. In this paper real time implementations have been performed for the VOIP over MPLS (Multi-Protocol...
The study presents the results of self-similar traffic effect on the performance quality indicators in the MPLS network using ns2 simulator. Multimedia 4G network traffic and IPTV-traffic were used as the test traffics. The statistical structure of the multimedia traffic was studied. There were determined probability laws of intervals of admission packages for service and probability time distribution...
Videos streaming is one of the top most used services delivered by Internet Service Providers. In contrast to classical video services, the streaming solutions offer interaction with the user and provide real-time feedback. In this paper we analyze the quality of the delivered video over MPLS networks, on of the most used technologies inside an ISP. We study the impact of traffic loss over the video...
Software-Defined Networking can be used to easily provision paths for business applications. However, such provisioning is static and is furthermore lost when application flows cross over to another operator domain. This paper proposes an online mechanism (SDNI) that considers application requirements and uses SDN to negotiate traffic policies between neighbouring operator domains. Hence, SDNI enables...
We introduce a distributed, dynamic, end-to-end (E2E) service-level management framework over a multi-domain SDN in order to enable end users to negotiate with their service providers a level of service according to their needs and budget. In this framework, the service provider offers multiple levels of service and allocates network resources to each user to satisfy specific service level requests...
Traffic Engineering (TE) algorithms aims at determining the packet routing paths in order to satisfy specific QoS requirements. These paths are normally established through control procedures e.g., exchange of RSVP messages in MPLS networks or links weights modification in pure IP networks. An increase of control traffic or long convergence time intervals, respectively, are the drawbacks of these...
This research paper investigates the challenges and issues (like wireless mobility, coverage, bandwidth, signal strength etc.) faced by 4G wireless networks in providing Quality of Services (QoS) [1]. The paper also focuses on how to improve QoS and proposes architecture for future 4G wireless networks using existing wireless infrastructure for smart cities [2]. The proposed solution will help telecom...
Application-specific Quality of Service (QoS) and additional Service Level Agreement (SLA) parameters to guarantee the committed service quality and avoid service interruption may be crucial in emerging applications and services. Moreover, among the wide range of services over IP transport networks, those requiring bandwidth-on-demand and related to network functions virtualization (NFV) are of particular...
Performance evaluation of VoIP is done by considering the network parameters jitter, packet end to end delay, and packet delay variation. Integration of Quality of Service (QoS) with the Internet Protocol (IP) and Multiprotocol Label Switching (MPLS)networks should enhance the performance of the network. Various scheduling algorithms can be used for implementing QoS on a network. In this paper, the...
An algorithm for Customer Virtual Network (CVN) reconfiguration with QoS constraints and bandwidth guarantees is presented. An MPLS virtual network supporting CVNs is pre-planned or dynamically reconfigured. Exhaustive simulations results show 19% CAPEX savings when the MPLS network is reconfigured.
Within the EU Project IoT@Work future Internet techniques such as network virtualization are investigated in order to provide communication services in automation systems. The physical network is modeled as an abstract pool of resources that is allocated through virtual slices to different automation applications. Each slice of the network resources fulfils the application communication needs in terms...
3G small cells are becoming a promising solution for inexpensive 3G coverage in rural small villages, but the high cost of backhaul infrastructures remains an obstacle for the worldwide adoption of this kind of solutions. On the other hand, broadband wireless infrastructures may be found in many rural areas for communications in specific sectors such as health or education services, environmental...
This paper presents an implementation of new QoS algorithm (SPPA, Sync- Pre-empted Probability Algorithm) for IntServ-aware MPLS network under windows platform. The algorithm, which comprises of optimal LSPs (Label Switching Paths) selection and the network resource allocation, is injected into the ingress router to verify the feasibility. This algorithm avoids the congestion in network traffic and...
This paper proposes a methodology for resource consolidation towards minimizing the power consumption in a large network, with a substantial resource overprovisioning. The focus is on the operation of the core MPLS networks. The proposed approach is based on a software defined networking (SDN) scheme with a reconfigurable centralized controller, which turns off certain network elements. The methodology...
Multi-Protocol Label Switching (MPLS), which was introduced by Internet Engineering Task Force (IETF), is widely used in communication networks to provide QoS guaranties to traffic. In this connection-oriented protocol, network failures can cause a serious disruption to critical data traffic which is unacceptable for customers who require highly reliable services. To guarantee high QoS and enhance...
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