INTERSYSTEM HANDOVER BETWEEN A FIRST AND SECOND NETWORK USING IDLE MODE TO QUICKLY RECONNECT TO THE FIRST NETWORK

摘要

pMethods and apparatus for easily and quickly returning to a first radio access technology (RAT) network when handover to a second RAT network is cancelled are provided. The methods and apparatus may involve a mobile station (MS) entering idle mode before handover to the second RAT network is completed and requesting a serving base station (BS) to retain MS service and operational information, as well as service flow state information. In this manner, should handover to the second RAT network be cancelled before completion, a re-entry to the first RAT network may be expeditiously performed using the retained MS information./p [US2009280812A1]