Patent ID: 9301230
Filing Date: 2016-03-29
CPC Classification: H04W

Claim Text:
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.