Mobile IP: state of the art report

Due to roaming, a mobile device may change its network attachment each time it moves to a new link. This might cause a disruption for the Internet data packets that have to reach the mobile node. Mobile IP is a protocol, developed by the Mobile IP Internet Engineering Task Force (IETF) working group, that is able to inform the network about this change in network attachment such that the Internet data packets will be delivered in a seamless way to the new point of attachment. This document presents current developments and research activities in the Mobile IP area

Análise dos problemas de provisão de QoS em redes sem fio utilizando simulação

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência da Computação

An Architecture for QoS guarantees and Routing in Wireless/Mobile Networks

Efforts are underway to enhance the Internet with Quality of Service (QoS) capabilities for transporting real-time data. The ReSerVation Protocol (RSVP) provides a signaling mechanism for end-to-end QoS negotiation. The issue of wireless networks and mobile hosts being able to support multimedia applications like voice and video that require QoS has become very significant. Reservation of resources and the maintenance of QoS for the mobile as it moves from one region to another creates a new set of challenges. Apart from resource reservation, there is a need for routing techniques which help in faster handoff so that QoS can be maintained. In this paper, a hierarchical architecture based on the concept of QoS-domains and routing-domains is proposed. The architecture will help in maintaining QoS and providing fast handoffs in wireless networks. The architecture uses a modified RSVP protocol that helps provide QoS support for mobile hosts. The modified RSVP protocol has been implemented in an experimental wireless and mobile testbed to test the feasibility and performance of our approach. The experimental results show that the modified RSVP helps in satisfying resource requests for mobile hosts, after hand-off occurs. The implementation of a routing architecture that uses mobile IP and route table changes is discussed and its incorporation into the experimental testbed is being worked on