Wireless Local Area Network (WLAN) offloading is an important approach to\naddress the data traffic challenge faced by Long Term Evolution (LTE) network.\nLegacy offloading solutions based on the core network suffer from the\nlimitations of load unbalance and user experience degradation. To solve this\nproblem, 3GPP has recently proposed a radio access network (RAN) assisted\nWLAN offloading scheme. In this article, we thoroughly analyze the performance\nof this new scheme, with emphasis on the RAN auxiliary parameters\nand control rules defined in it. Furthermore, two kinds of offloading algorithms\nbased on this scheme are proposed and compared with the traditional\nsolutions by simulation. Results show that the RAN-assisted offloading\nscheme can increase average user throughput and leverage resources available\nin both LTE and WLAN systems.
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