SYSTEM FOR EFFICIENT RECOVERY OF NODE B BUFFERED DATA FOLLOWING SERVING HIGH SPEED DOWNLINK SHARED CHANNEL CELL CHANGE

摘要

The present invention refers to efficient recovery of high speed downlink packet data (HSDPA) following switching. The invention is a method and system for the UE to perform a series of actions in order to reduce the latency and potentially to prevent loss of PDU transmission during the serving HS-DSCH cell change procedure. A new criterion is introduced for the UE generating status report of the PDU. UE generates status report of the PDU as soon as possible following notification of the HS-DSCH cell change indicated by the RRC procedure to more efficiently recover source NODE B buffered data. PDU status may be signaled for each AM RLC associated with the HS-DSCH transport channel. During Inter Node B serving HS-DSCH cell change the SRNC may wait for PDU status report before initiating transmission of new data in target cell.