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 p...

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Bibliographic Details
Published inWireless personal communications Vol. 41; no. 3; pp. 345 - 364
Main Authors Choi, Hyun-Ho, Song, Osok, Cho, Dong-Ho
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Nature B.V 01.05.2007
Subjects
Authentication
Broadband
Delay
Electric communication systems
Local area networks
Service introduction
Signaling
Universal Mobile Telecommunications System (UMTS)
User requirements
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Summary: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.
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-006-9146-2