Simulation design and performance evaluation of LWIP system

Tightly coupled LTE---Wi-Fi networks have emerged as a promising solution for improving capacity and coverage of wireless networks. Different architectures which realize this integration include LTE---Wi-Fi radio level interworking with IPSec tunnel (LWIP) and LTE---Wi-Fi Aggregation (LWA). In this paper, we firstly have described the structure of LWIP and stated its specific implement process. Then we have designed and implemented three different scenes to compare the performance differences between LWIP and LTE/WLAN. Simulation results demonstrate that the performances of LWIP are better than separate LTE and WLAN.