The access network discovery & selection function（ANDSF） is introduced in this paper. The selection of network connection can be made by ANDSF according to UE capability

subscriber preference

network capability and status

traffic type

operation strategy. This new technology can be employed to fulfill traffi c offl oading effectively

especially for traffi c offl oading from cellular network to WLAN network. In this paper

the technology standard

requirement of current network

application scenario is analyzed in detail and some employment proposals are provided. The standardization of ANDSF has not completed yet

how to introduce ANDSF and whether it is should be introduced is still an open question.