Patent ID: 8761120

Claim:
A method for handling cell change in a wireless communication system employing High Speed Downlink Package Access (HSDPA) technology, comprising: initiating a handover procedure to change a serving cell of a mobile device when the mobile device moves from a first HSDPA cell into a second HSDPA cell; performing a first physical channel reconfiguration procedure from a High Speed Physical Downlink Shared Channel (HS-PDSCH) to a Dedicated Physical Data Channel (DPDCH), wherein the first physical channel reconfiguration procedure is initiated via a Radio Network Controller (RNC) of the wireless communication system; and performing the handover procedure after performing the first physical channel reconfiguration procedure; wherein performing the handover procedure comprises performing a cell addition procedure corresponding to the second HSDPA cell, and steps of performing the cell addition procedure corresponding to the second HSDPA cell comprise: adding the second HSDPA cell to an active set of the mobile device, wherein the active set includes cells communicating with the mobile device, when receiving a first active cell update message from the RNC; transmitting a first active cell update complete message to the RNC when addition of the second HSDPA cell to the active set is complete; establishing a physical channel corresponding to the second HSDPA cell, when receiving a second physical channel reconfiguration message from the RNC; transmitting a second physical channel reconfiguration complete message to the RNC, after establishment of the physical channel corresponding to the second HSDPA cell is complete; and updating a neighbor list information in the mobile device, when receiving a first measurement control message from the RNC.