| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and apparatus for implementing a handoff between radio access networks (RANs) deployed under different radio access technologies.SOLUTION: Each RAN sends a list of co-located RANs in the coverage area of the RAN to a wireless transmit/receive unit (WTRU). The WTRU stores the list and determines whether handoff criteria are met by one of the co-located RANs. The WTRU then initiates a handoff from a current RAN to a target RAN if the handoff criteria are met by the target RAN. Alternatively, the WTRU may send a measurement report to the current RAN, and thereby the current RAN determines whether the handoff criteria are met by a selected one of the co-located RANs and initiates a handoff to the selected RAN if the handoff criteria are met. |
