Seamless handoff scheme based on pre-registration and pre-authentication for UMTS-WLAN interworking

Interworking issues between Universal Mobile Telecommunication System (UMTS) and Wireless Local Area Network (WLAN) have become a great matter of interest as an increasing number of mobile internet users require broadband wireless access to IP services in the wide area. In this paper, we present a practical UMTS-WLAN interworking architecture based on 3GPP standards and propose a seamless handoff scheme that guarantees low delay and low packet loss during UMTS-WLAN handoff. For low handoff delay, the proposed handoff scheme performs pre-registration and pre-authentication processes before layer 2 handoff. Moreover, it uses packet buffering and forwarding functions in order to reduce packet loss during the handoff period. On the above basis, detailed signaling procedures are presented, together with system requirements when a mobile terminal moves from UMTS to WLAN and vice-versa. Numerical results show that the proposed scheme performs well with respect to signaling cost, handoff delay, and packet loss compared with conventional schemes.
Publisher
SPRINGER
Issue Date
2007-05
Language
English
Keywords

DATA-NETWORKS; ARCHITECTURE; MOBILITY

Citation

WIRELESS PERSONAL COMMUNICATIONS, v.41, no.3, pp.345 - 364

ISSN
0929-6212
DOI
10.1007/s11277-006-9146-2
URI
http://hdl.handle.net/10203/165
Appears in Collection
EE-Journal Papers(저널논문)
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