Device and Method for Handling a Cellular-Wireless Local Area Network Aggregation

A communication device for handling a cellular-wireless local area network (WLAN) aggregation (CWA), comprising:

• a storage device, for storing instructions of:
• receiving a first configuration message configuring a CWA for a radio bearer, from a first cell of a cellular network;
• enabling data handling for the radio bearer at a CWA adaption protocol (CWAAP) entity according to the first configuration message;
• communicating a plurality of CWAAP protocol data units (PDUs) associated to the radio bearer with a first WLAN at the CWAAP entity, when enabling the data handling for the radio bearer;
• receiving a handover command from the first cell of the cellular network, wherein the handover command configures the communication device to perform a handover to a second cell of the cellular network;
• disabling the data handling for the radio bearer at the CWAAP entity in response to the handover command;
• and
• enabling the data handling for the radio bearer at the CWAAP entity, when the handover command configures the CWA and the communication device completes the handover;
• and
• a processing circuit, coupled to the storage device, configured to execute the instructions stored in the storage device.

A communication device for handling a cellular-wireless local area network (WLAN) aggregation (CWA), comprising:

• a storage device, for storing instructions of:
• receiving a first configuration message configuring a CWA for a radio bearer, from a first cell of a cellular network;
• enabling data handling for the radio bearer at a CWA adaption protocol (CWAAP) entity according to the first configuration message;
• communicating a plurality of CWAAP protocol data units (PDUs) associated to the radio bearer with a WLAN at the CWAAP entity, when enabling the data handling for the radio bearer;
• initiating a radio resource control (RRC) connection reestablishment procedure to the first cell or a second cell of the cellular network;
• disabling the data handling for the radio bearer at the CWAAP entity in response to the RRC connection reestablishment procedure;
• and
• enabling the data handling for the radio bearer at the CWAAP entity, when receiving a second configuration message configuring the CWA from the first cell or the second cell, after the RRC connection reestablishment procedure;
• and
• a processing circuit, coupled to the storage device, configured to execute the instructions stored in the storage device.