Timer based Stall Avoidance method in HSDPA system

The present invention is a high speed downlink packet access: to prevent the (HSDPA High Speed ​​Downlink Packet Access) a receiving side medium access in controlling layer to control a reordering buffer, in particular data block is stored in the reordering buffer of the system being in a deadlock situation It will have to make. The present invention is to determine the possible high-speed downlink packet access (HSDPA) a receiving side medium access control layer of the system according in delivering the data blocks to the upper layer, the receiving the data block and the received data blocks delivered to the upper layer step; Storing the data block received after check for the existence of deadlock the timer is transferred to the check result of the upper layer that is if the non-data block operation, and If it is not, operation drives the deadlock timer to reorder buffer to the serial number sequence .; When the operation is being interwoven timer expires, including the transfer and, deadlock the timer expires, the data blocks of successful data block received by one of the stuck timer expires, the data block before the data block to an upper layer in the subsequent data block and all the possible data blocks are sequentially delivered from characterized in that it comprises the step of delivering to an upper layer.