Patent ID: 8831606

Claim:
A mobile terminal registration method in a radio network, comprising following steps: a. a mobile terminal sending a non-access stratum message and identifier information of last registration to a radio access network unit, and the identifier information comprising a Serving CN Node identifier (Mobility Management Entity Identifier (MME ID)), a Serving CN Node pool identifier (Pool ID) and a Public Land Mobile Network Identifier (PLMN ID); b. if the radio access network unit determines that the identifier information is invalid, the radio access network unit allocating a Serving CN Node to the mobile terminal and sending the non-access stratum message to the Serving CN Node; c. after the Serving CN Node receives the non-access stratum message, if determining that the registration request of the mobile terminal can be accepted, the Serving CN Node sending a success response message to the mobile terminal which carries the identifier information of the current Serving CN Node, including the MME ID and the Pool ID, or further including the PLMN ID; and d. the mobile terminal saving the identifier information in the success response message after receiving the success response message.