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ABSTRACT: Recently, there has been increasing interest in applying MPLS (multi-protocol label switching) to IP-based wireless access networks. During a handover on a mobile MPLS-based network a registration update message is sent from the foreign agent (FA) to the home agent (HA) which results in a handover delay. There have been proposals for handover processing mechanisms over MPLS-based networks using micro-mobility to decrease the amount of signaling delay between the HA and the FA. Unfortunately, network delays still occur when the demand on the network exceeds its capacity. This makes it difficult to guarantee QoS. In this paper we propose to isolate multimedia traffic from the other traffic flows as in dynamic-class based threshold (D-CBT). Non-multimedia traffic will be forwarded to the active queue management (AQM) system. We implemented load balancing on AQM for multimedia traffic. In this paper, we propose an approach that dynamically adjusts the threshold on multimedia traffic and Drop/Mark probability based on queue length, output rate, and media access delay on a micro-mobility on a MPLS-based network. Our simulation results show that our proposed technique provides maximum resource utilization, and decreases the number of packets dropped. In addition, our proposed method also yields lower average queue length
Communication Networks and Services Research Conference, 2006. CNSR 2006. Proceedings of the 4th Annual; 06/2006
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ABSTRACT: Real-time multimedia is typically associated with various quality of service (QoS) requirements. Several QoS routing schemes have been proposed to determine a path which has sufficient bandwidth to achieve the desired QoS requirements. Some of these schemes flood nodes with advertisements to obtain information about congestion on the links. Consequently, protocol overhead is of concern in such cases. Other schemes use source routing to determine the shortest routing path, but security is a major concern for allowing source routing in the Internet. To efficiently support QoS over IP networks, traffic engineering (TE) has introduced multiprotocol label switching (MPLS). QoS routing is an essential component of MPLS to maximize network resources. In this paper, we propose an approach that sets up a label switched path (LSP) based on the lowest time delay from the ingress to the egress router using only the ingress, rather than requiring all the nodes in the network to exchange information. Our simulation results show that with our proposed approach, we obtain an improvement in the number of packets delivered and better use of network resources. Furthermore, modification of the MPLS domain is not required.
Systems Communications, 2005. Proceedings; 09/2005
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ABSTRACT: In recent years, IP networks have been subjected to different types of Internet applications with different quality of service (QoS) requirements. Traffic engineering enables routed traffic to be altered from standard routes to routes that improve network resources or avoid network congestions. However the best effort characteristic of IP makes it inadequate to support traffic engineering and QoS. To support QoS over IP networks, traffic engineering (TE) has introduced multiprotocol label switching (MPLS). Network traffic delays are often the result of network congestions. Internet service providers (ISP) have to minimize network congestions because such congestions cause packet delays, and consumption of network resources resulting in a decrease in QoS. In this paper we propose a congestion control scheme between the receiving node and the ingress router for MPLS-based networks. Our simulation results demonstrate that with our proposed approach, we obtain an improvement in the number of packets delivered and better use of network resources. Furthermore, with our approach, modification of MPLS is not required.
Telecommunications, 2005. Advanced Industrial Conference on Telecommunications/Service Assurance with Partial and Intermittent Resources Conference/ E-Learning on Telecommunications Workshop. AICT/SAPIR/ELETE 2005. Proceedings; 08/2005
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Multimedia Services Access Networks, 2005. MSAN '05. 2005 1st International Conference on; 07/2005
