SWITCHING METHOD AND SWITCHING SYSTEM BETWEEN HETEROGENEOUS NETWORKS

摘要

Provided are a switching method and system between heterogeneous networks. The switching method includes: a terminal sends identity information and a network access identifier to a home subscriber server by means of a mobile management entity; the home subscriber server sends the network access identifier to an access gateway; the home subscriber server receives a seed key sends the seed key to the terminal calculates a local key and a local identifier and sends the local key and the local identifier to an authentication authorization and accounting server of a target network; the terminal calculates a second switching key and a second switching identifier for network switching; and the authentication authorization and accounting server sends a first switching key obtained through calculation to an access point of the target network so as to be used for the access point and the terminal to execute a network switching operation. The technical solution of the present invention effectively decreases the communication traffic of a re authentication process when a cellular network (for example an LTE network) is switched to a WLAN network thereby decreasing the time delay of re authentication and effectively increasing the switching success probability.