A mobility management method, device and system

[0151]Embodiment 1 of the present invention provides a mobility management method, which is applied to an EPS, and the EPS includes at least two MMEs, at least two access network nodes, and a UE. Each of the at least two access network nodes establishes a static S1 connection with any one of the at least two MMEs in advance. Wherein, the at least two MMEs include the first MME and the second MME, the first MME is the MME currently serving the UE, and the second MME establishes a static S1 connection with the second access network node in advance; and at least two access The network nodes include a first access network node and a second access network node, the cell to which the UE is currently attached is a cell covered by the first access network node, and the cell covered by the first access network node is the same as the second access network node At least one cell covered by the access network node is adjacent, and the first access network node and the second access netwo...

[0165] Embodiment 2 of the present invention provides a mobility management method. When a UE moves from a cell covered by a first access network node to a cell covered by a second access network node, and the transfer from the first access network node to the second access network node has been completed After the handover of the network access node, the UE also needs to determine whether to trigger the TAU process according to the tracking area identifier of the currently attached cell (that is, the cell covered by the second access network node). In the embodiment of the present invention, after the UE enters the idle state, it is determined whether the TAU process needs to be triggered, specifically as figure 2 As shown, the method may include:

[0166] 101B. The UE determines that the current state is the idle state.

[0167] 102B. The UE determines that the received tracking area identifier sent by the second access network node is not in the tracking area list of the ...

[0173] Embodiment 3 of the present invention provides a mobility management method, which is applied to an EPS, and the EPS includes at least two MMEs, at least two access network nodes, and a UE. Each of the at least two access network nodes establishes a static S1 connection with any one of the at least two MMEs in advance. Wherein, the at least two MMEs include the first MME and the second MME, the first MME is the MME currently serving the UE, and the second MME establishes a static S1 connection with the second access network node in advance; and at least two access The network nodes include a first access network node and a second access network node, the cell to which the UE is currently attached is a cell covered by the first access network node, and the cell covered by the first access network node is the same as the second access network node At least one cell covered by the access network node is adjacent, and the first access network node and the second access netw...