A QoS-Enable Solution for Mobile Environments

Nuno Lopes, Maria J. Nicolau, Alexandre Santos

Universidade do Minho
Escola de Engenharia
4710-057 Braga, Portugal

Tel.: +351 253 604430
Fax.: +351 253 604471
E-mail: vascolopes (at) di.uminho.pt, joao (at) dsi.uminho.pt, alex (at) di.uminho.pt


This paper addresses the problem of designing a suitable Quality of Service (QoS) solution for mobile en- vironments. The proposed solution deploys a dynamic QoS provisioning scheme able to deal with service protection during node mobility within a local domain, presenting extensions to deal with global mobility. The dynamic QoS provisioning encompasses a QoS architecture that uses explicit and implicit setup mechanisms to request resources from the network for the purpose of supporting control plane functions and optimizing resource allocation.

For efficient resource allocation, the resource and mobil- ity management schemes have been coupled resulting in a QoS/Mobility aware network architecture able to react proac- tively to mobility events. Both management schemes have been optimized to work together, in order to support seamless han- dovers for mobile users running real-time applications.

The analysis of performance improvement and the model parametrization of the proposed solution have been evaluated using simulation. Simulation results show that the solution avoids network congestion and also the starvation of less priority DiffServ classes. Moreover, the results also show that bandwidth utilization for priority classes is levered and that the QoS offered to Mobile Node’s (MN’s) applications, within each DiffServ class, is maintained in spite of MN mobility.

The proposed model is simple, easy to implement and takes into account the mobile Internet requirements. Simulation results show that this new methodology is effective and able to provide QoS services adapted to application requests.

CRC 2010 - Actas da 10a Conferência sobre Redes de Computadores, 2010, eds. A. Santos, P. Carvalho, M. Nicolau, et al, ISBN: 978-989-96929-1-6, Universidade do Minho, Braga, Portugal , 2010