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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...
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...
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...
Network resources in terms of available bandwidth are not always sufficient to provide desired quality of service, especially for real-time traffic. Network performance parameters such as delay, jitter and packet loss are significant indicators of suitability of the path for this type of traffic. To provide QoS traffic engineering methods are used. In this paper we focus on traffic engineering in...
One of the solutions to overcome the network congestion issue over the WAN is to deploy QoS. However Service Provider rarely utilized the QoS function to avoid any implication on the network because it requires high maintenance and attention from network administrator. Usually they would propose customers to add more bandwidth due to congestion but it would only resolve the congestion issue temporarily...
This paper proposes a new Bandwidth Constraints Model for MPLS networks, called CAM (Courteous Allocation Model). CAM allocates added bandwidth to lower classes of traffic without affecting the high priority traffic. Simulations are performed to compare CAM with the two basic Constraints Models, namely, MAM (Maximum Allocation Model) and RDM (Russian Dolls Model). The results show that our model gives...
We present HADEGA, a novel adaptive mitigation solution to handle the impact of network attacks. By extracting information from network detection alerts, and build upon the Multiprotocol Label Switching (MPLS) standard, the solution assigns labels and quality of service treatments to suspicious flows. As a result, those labeled flows are controlled and properly handled inside the core network of service...
IP/MPLS based ASON/GMPLS networks enable the interaction between the IP layer and the optical WDM layer. Furthermore, it decouples the physical topology from the dynamically created IP topology, which is called Virtual Topology. In this network architecture, there are two known routing policies, they are the Physical Topology First (PTF) and Virtual Topology First (VTF). PTF and VTF are different...
Multi Protocol Label Switching (MPLS) is a core networking Quality of service architecture that basically operates in between Layers 2 and 3 of the Open Systems Interconnection (OSI) model; for this reason, MPLS has been referred to as operating at Layer 2.5. MPLS provides its users a number of advantageous features for instance guarantee Quality of Service (QoS), failure protection,. MPLS networks...
This paper presents an overview of the current service delivery models that exist in the Internet, covering also the motivation that triggered the introduction of each model separately. Different Quality of Service (QoS) frameworks like Integrated Services (IntServ), Differentiated Services (DiffServ) and Multiprotocol Label Switching (MPLS) are presented taking into consideration also the alteration...
On the analysis of QoS control mechanism of IMS architecture in 3GPP, this paper proposed a DiffServ-based QoS control mechanism of the IMS network, using MPLS bearing technologies, from the core network and the bearer network to achieve the end to end QoS control of IMS network.
The appearance of new uses underlines the need for a greater quality of service (QoS) not only for conveying accurately or increasing a certain traffic, but also conveying it as soon as possible while holding management account of the resources networks (band-width), which implies a network management even more complex. These are the needs which gave birth to MPLS technology. Admittedly, the growth...
In this paper a flow-based model balancing queues at the nodes of MPLS-network is proposed. The novelty of the model is that it, in the contrast to the previously known models takes into account the features of the Traffic Engineering Queues technology. This technology has a purpose to ensuring load balancing of the node buffer resource.
Many services provided over the Internet, like voice over IP and video on demand, increase the demand for assurances concerning the quality of the underlying network. A score of techniques for assurance of quality of service (QoS) have been devised for use within administrative domains. However, when paths cross the border of autonomous systems, assurance of end-to-end QoS remains an unsolved issue...
In this paper, we investigate and evaluate the performance of two fast reroute mechanisms in packet switched core networks. Such mechanisms enable, in the case of a network fault, the fast switchover of protected traffic onto pre-established backup paths within minimal time (typically below 50 ms) to minimize traffic loss. Our research testbed consists of both real and emulated IP/MPLS Label Switching...
Wireless Mesh Networks (WMNs) research has matured in recent years and implementations are being tested around the world. In a WMN, participating nodes are automatically configured allowing them to communicate among their peers via multiple hops when no direct physical connectivity exists. Increasing demand for real-time multimedia content poses a challenge for the typical WMN routing protocols such...
Multiprotocol Label Switching (MPLS) is an Internet Engineering Task Force (IETF) specified framework that provides for the efficient designation, routing, forwarding and switching of traffic flows through the network. MPLS is a versatile solution to address the problems faced by present-day networks like speed, scalability, quality-of-service (QoS) management, and traffic engineering. MPLS carries...
One of the major challenges for next-generation mobile systems is to achieve efficient mobility management in next generation wireless networks. To track host mobility, Mobile IP setup a tunnel between the Home Agent and the Mobile Node. This paper proposes a new architecture called LinkWork Mobile MPLS which takes advantage of MPLS traffic engineering capability, to achieve fast-reroute when a mobile...
The Quality of Service (QoS) research investigations in Wired and Wireless networks have been conducted mostly in isolation [2]. Recently, a need for an end to end quality of service over hybrid networks (containing wired and wireless segments) has become evident. IEEE 802.11e work group has set up the standards for wireless network quality of service which became part of the comprehensive approved...
MPLS recovery mechanisms are increasing in popularity because they can guarantee fast restoration and high QoS assurance. In fact, QoS is important for interactive voice and video application and for specific clients. However, link failure always incurs delay and packet losses of the traffic passing through the failed link. Therefore, network has to restore the traffic by switching the affected traffic...
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