Abstract
This paper presents the design and analysis of GPRS-WLAN Mobility Gateway (GWMG) for the integration of GPRS and wireless LANs (WLANs). The proposed architecture leverages Mobile IP as the mobility management protocol over WLANs. The interworking between GPRS and WLANs is achieved by the GWMG which resides on the border of GPRS and WLAN systems. The design goal is to minimize the modications in GPRS and WLANs as that both systems are widely available in the market already. By deploying the GWMG, users can seamlessly roam among two systems. Both mathematical analysis and simulation are developed to analyze the performance. The analysis models include the cost, handoff latency, and buffer size. The proposed GWMG has also been implemented in a commercial GPRS system. The results show that the GWMG could achieve the design goal to effectively integrate GPRS and WLANs.