SHARE: seamless handover architecture for 3G-WLAN roaming environment

Authors:
Chaegwon Lim;Dong-Young Kim;Osok Song;Chong-Ho Choi
Affiliations:
School of Electrical Engineering and Computer Science, and ASRI, Seoul National University, Seoul, Korea;School of Electrical Engineering and Computer Science, and ASRI, Seoul National University, Seoul, Korea;Samsung Electronics Co., Suwon, Korea;School of Electrical Engineering and Computer Science, and ASRI, Seoul National University, Seoul, Korea
Venue:
Wireless Networks
Year:
2009

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Abstract

For the transition from 3G communication systems to 4G communication systems, 3G-WLAN interworking systems can be a reference model for 4G communication systems. In this paper, we identify challenging problems in 3G-WLAN interworking systems and propose a loosely coupled architecture called SHARE. In SHARE, each WLAN hotspot access point (AP) is equipped with a 3G radio transmission module to generate radio signals for control channels of 3G networks in addition to a WLAN radio module. Consequently, base stations of the 3G networks share their control channels with hotspot APs. By monitoring these channels, mobile nodes can easily detect available WLAN hotspots without probe delay for handovers.