Abstract
3G-WLAN heterogeneous network handover technology as one of the key technology of next generation wireless mobile communication technology, other countries have conducted in-depth research on it. Network heterogeneity is one of the biggest challenges of vertical handover, the traditional vertical handover algorithm can no longer adapt to the booming of network integration. This thesis mainly researches the 3G-WLAN heterogeneous network security of access and seamless handover algorithm simulation and performance analysis. Comparing with the traditional vertical handover algorithm, 3G-WLAN network handover algorithm has adopted tight coupling integration schemes and considered the location, speed and angle information of the mobile terminal, distinguish handover mode, set the variable into the community out distance, and assisted by receiving signal strength, effectively reduced the handover frequency, limited the ping-pong effect, improved the handover performance.
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