Patent ID: 7440763

Claim:
A method for performing call-setup in a multi-access communication system, comprising: passively scanning, from a mobile terminal, an existence of usable base stations of a second access network, said second access network having a lower energy-resource efficiency for keeping a mobile terminal reachable than a first access network; reporting data associated with said existence of said usable base stations of said second access network from said mobile terminal to said first access network; receiving an incoming call for said mobile terminal from an external entity by said first network; paging said mobile terminal by said first access network after receiving the incoming call, said paging comprising access information based on the data reported from said mobile terminal, said access information enabling determination of a preferred access network among at least said first access network and said second access network to which said mobile terminal is connectable; establishing a call-setup according to said access information, wherein said access information comprises a demand of quality of service for the call to be setup; and determining said preferred access network based on said demand of quality of service and on pre-determined knowledge about characteristics of at least said first access network and said second access network.