The User-Equipment-controlled cell reselection algorithms in a UMTS or GERAN system currently operate independently of any subscriber-specific or service considerations. All user equipments, UE, are handled in the same way. In the case that any service or subscriber differentiation is required, e.g. for traffic steering between UTRAN and GERAN, this is typically performed once the UE has entered the UMTS CELL_DCH RRC state in which the network controls the mobility of terminal individually.
The proposed invention allows the mobile radio network to signal to certain mobiles an offset which is applied on the normal cell reselection parameters in order to selectively change the cell reselection behaviour of specific mobile terminals. This allows for example to steer some mobiles, e.g. depending on the used service, subscription, terminal capabilities etc., from one radio access technology to another based on changed cell reselection parameters.