QoS issues in mobile IP: challenges, requirements and solutions

Guaranteeing Quality of Service (QoS) in the Internet is a topic of active research. The technologies that have drawn the most attention are several different models. IntServ uses the per-flow approach to provide guarantees to individual streams, DiffServ provides aggregate assurances for a group of applications, while MPLS tries to provide the efficiency and simplicity of IP routing together with the high speed switching of ATM by integrating the label-swapping paradigm with network layer routing. However, all these models have been designed to work for fixed Internet so far. There exists an urgent and important requirement today to study and identify the possible modifications that need to be made to make them suitable for the coming mobile Internet. In this paper, we aim to develop a thorough understanding of the unique opportunities and challenges, problems, requirements and candidate solutions, that arise in modifying the existing QoS models in order to enable them to efficiently work in mobile Internet. Some existing work is outlined as a survey, while some new ideas and proposals are presented from the research viewpoint