The vigorous development of WLAN in recent years has introduced various kinds of WLAN techniques and research subjects been brought up. The development of WLAN in recent years has deeply involved in our life. Besides of applying in home and office, IEEE 802.11 is also used in medium to long distance wireless transmission. Therefore we proposed a ”Traffic Splitter Gateway Mechanism” that utilizes the link aggregation method in combination with RoHC to flexibly switch channels and utilize the wireless resources more efficiently in WLAN.