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

摘要

THE PRESENT INVENTION RELATES TO EFFICIENT RECOVERY OF HIGH SPEED DOWNLINK PACKET ACCESS (HSDPA) DATA FOLLOWING HANDOVER. THE PRESENT INVENTION DISCLOSES A METHOD (10) AND SYSTEM FOR THE UE TO PERFORM A SERIAL OF ACTIONS IN ORDER TO REDUCE THE LATENCY AND POTENTIALLY PREVENT LOSE OF PDU TRANSMISSION DURING THE SERVING HS-DSCH CELL CHANGE PROCEDURE. A NEW CRITERION IS INTRODUCED FOR UE GENERATION OF THE STATUS REPORT OF RLC PDU. THE UE GENERATES STATUS REPORT OF THE STATUS OF RLC PDU. THE UE GENERATES STATUS REPORT (STEP 20) OF THE PDUS 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 SIGNALLED FOR EACH AM RLC INSTANCE ASSOCIATED WITH THE HS-DSCH TRANSPORT CHANNEL. FURTHERMORE, UPON 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.