Tesis doctoral de Xavier Perez Costa
In this thesis the state of the art for ip networks and the two most predominant wireless access networks, umts and wireless lans, has been reviewed with respect to the enhancements required toward the objective of supporting services across different network technologies in a seamless manner. Three main areas of research were identified as key in the path toward all-ip networks: i) ip-based mobility management, ii) ip-based umts radio access networks and iii) qos for wireless lans. future all-ip networks require of an ip-based mobility management protocol to support mobility across heterogeneous networks. Several protocols are being proposed in the ietf for this purpose with mobile ipv6, hierarchical mobile ipv6 and fast handovers for mobile ipv6 being the ones with a higher acceptance. Our contribution in this area has been the thorough study of the performance enhancements provided by each protocol and their associated costs in realistic scenarios to support the design process of mobile ipv6-based networks where the suitability of the different options has to be evaluated. in addition, we proposed a combination of hierarchical mobile ipv6 and fast handovers for mobile ipv6, based on the description provided in the hierarchical mobile ipv6 draft, that aims to outperform both proposals by adding the advantages of each of them. during the evaluation of the ip-based mobility management protocols, the mobility model influence over the performance results led to an additional line of study where the main characteristics of the random waypoint mobility model were analyzed. The random waypoint model is a commonly used mobility model for simulations of wireless communication networks. We gave a formal description of this model in terms of a discrete- time stochastic process which provides a deep understanding on the characteristics of the mobility created by its usage. The results of our work are of practical value for performance analysis o
Datos académicos de la tesis doctoral «Toward aii-ip networks, ip and wireless networks convergence«
- Título de la tesis: Toward aii-ip networks, ip and wireless networks convergence
- Autor: Xavier Perez Costa
- Universidad: Politécnica de catalunya
- Fecha de lectura de la tesis: 09/05/2005
Dirección y tribunal
- Director de la tesis
- SebastiÁ Sallent Ribes
- Tribunal
- Presidente del tribunal: jose Paradell aspas
- eugenio Garcia moreno (vocal)
- raul Toral garces (vocal)
- Manuel Matias muriel (vocal)