METHOD FOR CONTROLLING HANDOVERS TERMINAL DEVICE BASE STATION AND WIRELESS COMMUNICATIONS SYSTEM

摘要

DISCLOSED IS A METHOD THAT EXECUTES HANDOVERS WITHOUT DATA LOSS EVEN IN CIRCUMSTANCES WHEREIN CROSS-SCHEDULING MAY BE TAKING PLACE. IN A METHOD FOR CONTROLLING HANDOVERS FROM A FIRST BASE STATION TO A SECOND BASE STATION BY A TERMINAL DEVICE THAT COMMUNICATES WIRELESSLY UPON A COMMUNICATIONS CHANNEL THAT IS FORMED BY INTEGRATING A PLURALITY OF COMPONENT CARRIERS, SCHEDULING INFORMATION CONCERNING EACH RESPECTIVE COMPONENT CARRIER IS DISTRIBUTED ACCORDING TO ETHER A STRAIGHT SCHEDULING PROTOCOL OR A CROSS-SCHEDULING PROTOCOL, AND THE METHOD INCLUDES A STEP OF INSTRUCTING A HANDOVER FROM THE FIRST BASE STATION INITIALLY TO THE TERMINAL DEVICE CONCERNING A SECOND COMPONENT CARRIER THAT IS TO BE OPERATED ACCORDING TO THE STRAIGHT SCHEDULING PROTOCOL UPON THE SECOND BASE STATION WHEN IT IS DETERMINED THAT A HANDOVER IS TO BE EXECUTED CONCERNING A FIRST COMPONENT CARRIER ACCORDING TO THE CROSS-SCHEDULING PROTOCOL.