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. Method of initiation of an inter-system handover of a mobile terminal accessing a communication network, wherein the communication network comprises at least a radio access network of a first type and a radio access network of a second type, wherein the mobile terminal is capable of operating in at least the radio networks of the first type and the second type, comprising
initiating the inter-system handover of the mobile terminal accessing the communication network via the radio access network of the first type in response to the mobile terminal transmitting information including at least one bearer capability field indicating that a requested service is only operable with the radio access network of the second type, wherein the at least one bearer capability field has an inapplicable parameter value in view of the radio access network of the first type and wherein the at least one bearer capability field is ignored by the radio access network of the second type.