Inter-system hand-over of a mobile terminal operable with a first and a second radio access network

摘要

A method and device for initiation a mobile originating service-based inter-system handover. At least two radio access networks (RANs) of different types, i.e. RAN of a first type and a RAN of a second type. A dual-mode mobile terminal communicates with the communication system via the RAN of the first type. The initiation of the inter-system handover is included in a transmission including a bearer capability (BC) field. The BC field indicates that a requested service is only operable with the RAN of the second type. In particular, at least one BC field is set to a parameter value, which serves as indication for the receiving network and its processing entities, respectively, which receiving network indicated to carry out the inter-system handover initiated by the mobile terminal.

主权项

1. A method of initiating a service based inter-system handover by a mobile terminal comprising:
accessing a communication network via a radio access network of a first type by the mobile terminal, the communication network comprises at least said radio access network of the first type and a radio access network of a second type; transmitting by the mobile terminal information including at least one field indicating that a requested service is operable only with the radio access network of said second type, wherein the at least one field comprises an inapplicable parameter value for the radio access network of said first type and the at least one field is ignored by the radio access network of said second type; initiating the service based inter-system handover from the radio access network of the first type to the radio network access network of the second type in response to the information transmitted by the mobile terminal, wherein the information transmitted by the mobile terminal prevents the radio access network of the first type from determining a configuration to prevent the service based inter-system handover.