The present invention relates to a network implicit
separation method of a user terminal, comprising: after the user terminal is registered in the long-term evolution network and the 2G / 3
G network, establishing an associated user terminal between the two networks; in one network, the user terminal enters an idle state , the network node starts the mobile reachable
timer of the user terminal; after the mobile reachable
timer of the network node expires, the user terminal is set to the quasi-hidden separation state, which is also true if the user terminal is in another network Implicit separation state, the two networks implicitly separate the user terminal, and the
mobility management state of the user terminal on the network is set to the separation state. Therefore, in the
separation method of the present invention, the two network nodes independently control the
mobility management context of the user terminal, and when the downlink data arrives,
paging is only performed in the currently camped RAT network; the
impact on the existing
system is as little as possible; two The associated context synchronization signaling between networks saves network resources.