This research studies on multimedia applications which are now mainly achieved by wired and fixed internet users will also be widely achieved by mobile internet users in 4G networks as well. 3GPP2 has proposed a solution through integrating CDMA2000 network and WLAN network with fixed internet network for the issue. This kind of integration does not consider the wireless spectrum disparity and utilize them efficiently to get higher data rates for mobile internet users. In this study, we propose a new protocol to combine the two networks wireless spectrum. In the end, we simulate and quantitatively demonstrate the new protocol performance.