RFID-assisted Movement Detection Improvement in IP Mobility

摘要

The current trend towards all-IP networks and the tremendous growth of wireless access technologies have sparked a significant research interest for enhancing the IP functionality. User mobility is one of the main concerns and Mobile IP is the standard protocol for supporting it, through a process named handover (HO). However, during HO the mobile node (MN)'s session is disturbed due to the HO latency. The movement detection procedure, whereby the MN becomes aware of its new IP network has been proposed for reducing the HO latency and the packet loss. Often layer 3 HOs are supposed to be driven by layer 2 triggers, making Mobile IP dependent of lower layer technologies and difficult to implement in heterogenous networks. In this paper, we propose a novel movement detection scheme based on the RFID (Radio Frequency IDentification) technology. The idea behind our proposal is to predict the next point of attachment of an RFID-enabied MN using topology information provided by an RFID system. The proposed scheme is simple, does not interrupt the main communication channel and is independent of the underlying radio access technology. Simulation-based results validate its performance in predicting accurately the next MN's movement.