Method for exchanging higher layer system information on a wireless system and automatic system selection of a wireless lan

In a communication network, the system information of broadcasting to using a high system message (e.g. an Internet protocol layer WTRUs); the IP layer providing new transmission, wherein the WTRUs the searching network and consultation of service social stratum of ability. The service social stratum information can be applied in selecting of wireless network, and transmission operation of in of a out of the is higher layer information system. The automatic network and sheet in of by using a a pre-formed programming's WTRUs or for is a general user distinguishing module, and a straight.