Active handover method and terminal based on high rate packet data system

An active handover method based on a High Rate Packet Data system, applied in handover of a terminal from a source system to the High Rate Packet Data system, the method comprises:

• the terminal receiving an active handover command, in which if a virtual connection has existed, it disconnects the virtual connection;
• and if the virtual connection is being established, it terminates the establishment process of the virtual connection;
• and
• establishing High Rate Packet Data air interface connection;
• wherein,
• when a virtual connection has existed or when a virtual connection is being established, a HRPD Signaling Adaptation Protocol module of the terminal is in a non-closed state, wherein the non-closed state includes:
• an open state indicating that the virtual connection has already existed, and an establishment state indicating that the virtual connection is being established;
• the step of disconnecting the virtual connection or terminating the establishment process of the virtual connection includes:
• transferring the HRPD Signaling Adaptation Protocol module to a closed state;
• and
• if the virtual connection does not exist, triggering the establishment of HRPD air interface connection, wherein when the virtual connection does not exist, the HRPD Signaling Adaptation Protocol module of the terminal is in the closed state.