| 摘要 |
Performing inter-RAT cell handover of radio access terminals in a multi-RAT network environment comprised of a plurality of RAT networks is expected to become more complicated with the increased number of different available RATs (GSM, UMTS, LTE, WiMAX, CDMA2000, etc.). A radio access terminal camping on a serving cell in a first RAT network and requiring handover to a different RAT must initiate a series of cell selection parameter measurements. By ensuring that measurements are performed in a predetermined order and by initiating handover to a cell for which the value of cell selection parameter exceeds an adequacy threshold value, the time taken for performing sufficient measurements can be reduced by comparison with conventional techniques. As a result the number of failed inter-RAT handovers can be reduced. |
