Abstract EN:

In this thesis, we orient our efforts towards the area of mobility handling and resource allocation in wireless multiservice networks. Our contributions concern second, third and fourth generation networks. First, we introduce a call admission control for wireless multiservice mobile networks. Two different scheduling schemes are analysed and compared. An innovative Dynamic Adaptive Architecture DYNAA is afterwards presented. Within this architecture, we introduce the adaptation concept that implies the ability of the application to adapt to the resource fluctuation and to share with the network the Quality of service (QoS) responsibility. We pursue our studies and bring the focus on the IP Wireless networks. In a first step, we present an enhanced uplink routing mechanism coupled with a smooth handover study in a Cellular IPv6 network. In a second step, the resource allocation and the call admission control aspects are treated in Cellular IPv6 networks. The DYNAA architecture with its enhanced version paves the way for a possible CAC and resource allocation that can be applied in Cellular IPv6 networks. We then investigate the issue of providing an end-to-end quality of service. Thus, we propose an end-to-end QoS approach using IntServ in the Cellular IPv6 networks and DiffServ in the core network. Another contribution of this thesis focuses on the QoS in IEEE 802. 11 WLAN. We propose a novel mechanism within the MAC sub-layer that enhances the differentiation among flows when compared to other approaches. The last contribution of this thesis deals with a QoS study of the MAC layer in UMTS. This study allows us to perform the call admission control in UMTS.