FIG. 9 is an exemplary flow chart of a method of QoS provision for downlink LWA packet from LTE base station perspective in accordance with embodiments of the current invention. In step 901, an LTE base station configures LTE-WLAN aggregation (LWA) for a user equipment (UE) in a wireless network. The UE is connected with both the base station and an LWA-enabled access point (AP). In step 902, the base station establishes a data radio bearer (DRB) with the UE. The DRB corresponds to an evolved packet system (EPS) bearer associated with a QoS Class Identifier (QCI). In step 903, the base station determines access category (AC) information based on the QCI. In step 904, the base station forwards a data packet carrying the AC information and a protocol data unit (PDU) to the AP. The PDU is to be transmitted to the UE using an AC value determined based on the AC information.

FIG. 10 is an exemplary flow chart of a method of QoS provision for downlink LWA packet from WLAN AP perspective in accordance with embodiments of the current invention. In step 1001, a WLAN AP establishes a connection with a user equipment (UE) in a wireless network. The UE is connected with both a base station and the AP for LTE-WLAN aggregation (LWA). In step 1002, the AP receives a data packet from the base station. The data packet comprises a protocol data unit (PDU) and access category (AC) information. In step 1003, the AP maps the AC information to an AC value based on AC mapping information. In step 1004, the AP performs a channel contention procedure using the AC value and transmitting the PDU to the UE upon winning the channel contention.