| 摘要 |
<p>A method for handover between systems is provided by the present invention. After a user terminal handovers from a first communication system to a second communication system, a communication control device of the second communication system obtains and saves encryption information of the user terminal. When the user terminal is to handover from the second communication system back to the first communication system, the communication control device of the second communication system sends the encryption information of the user terminal to a first access network device of the first communication system. The user terminal handovers back to the first communication system through the interaction between the first communication system and the second communication system. The method and device of the present invention may guarantee that the user terminal handovers successfully between two communication systems repeatedly.</p> |
