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Proactive Handover Decision for Mobile IP based on Link Layer Information

Mobile IP provides mobility support in heterogeneous wireless networks where mobile nodes change the point of attachment. The mobility is handled within the network layer and depends on either receiving router advertisements or sending solicitations. However, this movement detection is not appropriate to provide lossless connectivity during handovers. This paper presents a so-called proactive handover decision that is used before the previous link breaks. Moreover, this paper shows the improvement of handovers using modified link layer information. Therefore, three different handover scenarios are presented in this study to show the handover improvement during handovers between WLAN (802.11b) and GPRS. Keywords—Mobile IP, vertical handovers, WLAN, GPRS, proactive handover decision.