| 摘要 |
The present invention discloses a method of interworking between different radio access networks (RAN-A, RAN-B). In this method, a radio transceiver device capable of operating with the first radio access network (RAN-A) and the second radio access network (RAN-B) is attached to the first radio acces s network (RAN-A). The method comprises the steps of detecting (S11) a service request, accessing information on conditions for the first and the second radio access network (RAN-A, RAN-B) for giving sufficient support for a service requested by the service request, analysing (S12) whether or not the first radio access network (RAN-A) and the second radio access network (RAN- B) meets the conditions, and initiating a handover (S14) of the radio transceiv er device (MS) from the first radio access network (RAN-A) to the second radio access network (RAN-B) if the second radio access network (RAN-B) meets the conditions but the first radio access network (RAN-A) does not. Thus, the method according to the present invention serves to support dual mode mobile stations and networks in such a way that the correct radio access which sufficiently supports a requested service is automatically obtained.
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