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 network entity enabled for triggering an inter-system handover in a communication network, of which the network entity is a part, wherein the communication network comprises at least a radio access network of a first type and a radio access network of a second type, the network entity in a case of a mobile terminating call configured to:
receive a message over the radio access network of the first type, wherein the message is encoded with one or more information elements including at least one field indicating that a requested service is only operable with the radio access network of the second type; process the message; and, trigger the inter-system handover in response to processing the message.