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In this paper a new methodology to evaluate the protection performance of some existing mechanisms for establishing quality of service network paths with protection is presented. In order to evaluate the protection degree of a network, different components, such as protection parameters (packet loss and restoration time), or network parameters and(More)
IP based networks still do not have the required degree of reliability required by new multimedia services, achieving such reliability will be crucial in the success or failure of the new Internet generation. Most of existing schemes for QoS routing do not take into consideration parameters concerning the quality of the protection, such as packet loss or(More)
We define new quality-of-service (QoS) routing schemes with protection in In-ternet Protocol (IP)/Multiprotocol Label Switching (MPLS) over optical networks. The novelty of the proposed routing schemes is the use of the knowledge of the logical links already protected by the optical layer. The logical topology defined by the optical layer is given and(More)
— In this paper a novel methodology aimed at minimizing the probability of network failure and the failure impact (in terms of QoS degradation) while optimizing the resource consumption is introduced. A detailed study of MPLS recovery techniques and their GMPLS extensions are also presented. In this scenario, some features for reducing the failure impact(More)
— This paper focuses on QoS routing with protection in an MPLS network over an optical layer. In this multi-layer scenario each layer deploys its own fault management methods. A partially protected optical layer is proposed and the rest of the network is protected at the MPLS layer. New protection schemes that avoid protection duplications are proposed.(More)
The paper presents a novel protection methodology for setting protected paths in a multiservice GMPLS-based network scenario. By applying the proposed methods, label switched paths can be protected to obtain small failure probabilities and fast failure recovery time. The presented methodology allows classifying the required protection level depending on the(More)
Minimum interference routing schemes are good options for achieving fewer working-path request rejections. They improve the vast majority of the current QoS routing proposals. However, when backup paths are added there is no guarantee of achieving a similar performance. In this paper, we analyze the suitability of these routing schemes in protected network(More)
In the next generation optical internet, GMPLS-based IP-over-optical networks, ISPs will be required to support a wide variety of applications each having their own requirements. These requirements are contracted by means of the SLA. This paper describes a recovery framework that may be included in the SLA contract between ISP and customers in order to(More)
This paper presents a tool, for the analysis and regeneration of web contents, implemented through XML and Java. At the moment, the web content delivery from server to clients is carried out without taking into account clients' characteristics. Heterogeneous and diverse characteristics, such as user's preferences, different capacities of the client's(More)