MOBILE COMMUNICATION SYSTEM, USER EQUIPMENT, AND METHOD FOR REDUCING COMMUNICATION PROCESSING COMPLETION TIME USED FOR THEM

摘要

The present invention provides a user equipment that can shorten the time required for a communication ending. The user equipment is put into an error monitoring state in the procedure a4 at the MAC, and a synchronization check is performed. If a RLC-UM transmission request [MAC-DATA-REQ] is repeated (procedure a5) after the UTRAN side is cut off the air in the procedure a3 in the setting from the RLC to the MAC in the hierarchy in the user equipment, at the point where SIR deterioration is detected through a SIR check (procedure a7), the user equipment stops the MAC-DATA-REQ transmission prior to a DCH error detection after the synchronization check, and moves on to the DCH close procedure (procedure a10). The user equipment then ends the communication.