About 60 percent inter-system reselection is from the GSM / TD-SCDMA dual-mode terminals

which make voice calls on TD-SCDMA network

then handover to 2G network and reselect to TD-SCDMA network when hanging up.According to general scheme

the terminal should stay on 2G network and measure in idle state

then reselect to 3G network.The time for this process is very long and the user can not be paged.Fast Return is a method for inter-system reselection in this special scene

which can reduce the time for inter-system reselection about 95 percent and enhance the experience of user.There are three schemes realizing Fast Return

which have different advantages and disadvantages

including the request of equipment upgrading

the performance and the standardization.The paper introduces the principle of different schemes and contrast the advantages and disadvantages

combining with the performance and request of equipment

which make sense of application of Fast Return.