Handover Mechanism for Differentiated QoS in High-Speed Portable Internet

Abstract

When using the Mobile IP, which is the representative technology to secure the mobility in general IP networks, the packet loss during the handover is inescapable. To remedy the packet loss problem, the smooth handover was introduced. However, this solution is also flawed. In particular, the smooth handover causes the packet sequence to be disrupted during the packet forwarding procedure. In turn, it may result in the degradation of the network performance. The same problem also occurs in the HPi (High-speed Portable Internet) system; the next generation portable IP service system. The HPi system, which provides the high speed data service just like xDSL and leased line in wired internet, aims to guarantee the portability, mobility, and the differentiated service based on IEEE 802.16. In this paper, we will propose a handover mechanism and a packet sequence control algorithm that prevent the packet loss and the out-of-sequence packet problem for differentiated service in the HPi system.

This work was supported by University IT Research Center Project and the Research Grant from Kwangwoon University in 2004