Tesis doctoral de Anna Urra Fabregas
The use of optical technology in core networks combined with ip/multi-protocol label switching (mpls) solution has been presented as a suitable choice for the next generation internet architecture. The integration of both layers is facilitated by the development of generalized mpls (gmpls). in this network architecture, a single fibre failure can result in potentially huge data losses as the effects propagate up and through the network causing disruptions in the service of many applications. Thus, survivability has become a key issue to improve and satisfy the increasing requirements of reliability and quality of service (qos) of these applications. Fault recovery schemes have been adopted in the network in order to provide such survivability. These schemes are based on switching the traffic affected by the failure to an alternative/backup path. The computation of the working and backup path is a crucial step to offer the required qos to the traffic services. Some relevant parameters, such as resource consumption and recovery time, could be affected negatively if suitable routing algorithms are not used. According to the timing of backup path computation, recovery mechanisms are classified in protection and restoration. Although restoration is flexible in terms of resource consumption, it offers low recovery time and the recovery action may not be successful because there are insufficient network resources. Protection describes recovery schemes that are pre-planned for both spare capacity and backup paths achieving the shortest recovery time and providing high availability against network failures. The accuracy and performance of qos with protection (qosp) routing algorithms in terms of resource consumption depends on the available network information. The availability of full or partial network information influences the management of the network capacity. The reduction of the recovery time is another parameter to be considered for backup path selection and it is
Datos académicos de la tesis doctoral «Multi-layer survivability: routing schemes for gmpls-based networks«
- Título de la tesis: Multi-layer survivability: routing schemes for gmpls-based networks
- Autor: Anna Urra Fabregas
- Universidad: Girona
- Fecha de lectura de la tesis: 18/12/2006
Dirección y tribunal
- Director de la tesis
- Marzo Lazaro Jospe LLuis
- Tribunal
- Presidente del tribunal: jordi Domingo pascual
- a. Schupke dominic (vocal)
- tricha Anjali (vocal)
- xavier Masip (vocal)