Mobility protocols and RSVP performance in wireless IPv6 networks: shortcomings and solutions
Resource reservation protocol (RSVP) is a network-control protocol used to guarantee Quality-of-Service (QoS) requirements for real-time applications such as Voice-over-IP (VoIP) or Video-over-IP (VIP). However, RSVP was designed for end-systems whose IP addresses do not change. Once mobility of an end-system is allowed, the dynamically changing mobile IP address inevitably impacts on RSVP performance. Our Study aims to first quantify the significance of this impact, and then propose a modified RSVP mechanism that provides improved performance during handoffs. Our simulations reveal that the deployment of standard RSVP over Mobile IPv6 (MIPv6) does not yield a satisfactory result, particularly in the case of VIP traffic. Fast Handovers for Mobile IPv6 (FMIPv6) was found to be providing the best performance in all tested scenarios, followed by Hierarchical Mobile IPv6 (HMIPv6) with a single exception: during low handoff rates with VoIP traffic, MIPv6 outperformed HMIPv6. We then designed a new RSVP mechanism, and tested it against standard RSVP. We found that the proposed approach provides a significant improvement of 54.1% in the Total Interruption in QoS (TIQos) when deployed over a MIPv6 wireless network. For HMIPv6, performance depended primarily on the number of hierarchical levels in the network, with no improvement in TIQos for single-level hierarchy and up to 37% for a 5-level hierarchy. FMIPv6 on the other hand, provided no room for improvement due to pre-handoff signaling and the tunneling mechanism used to ensure a mobile node (MN)'s connectivity during a handoff, regardless of the RSVP mechanism used. Copyright (C) 2007 John Wiley & Sons, Ltd.
rsvp qos voice-over-ip video-over-ip mobile ip hierarchical mobile ip