Nokia Corporation

Janne Esa Petteri Noyranen

Olli Antero Rantapuska

Esko Mikael Kokkonen

Jyrki Tauno Johannes Porio

Marcin Matuszewski

Heiki Juhani Kokkinen

The invention relates to a method where a first address () from a first network () is obtained to a mobile node (). Network address translation information is received from a network node () to the mobile node (), the network node () being connected to a second network (). An address mapping is indicated between the first address () and a second address () to the network node (), the second address () being associated with the second network (). A session establishment request is obtained. The request comprises instances of the first addresses () and third addresses (). The first addresses () are replaced with the second addresses () in the request. An address mapping is indicated between the third address () and a fourth address () to the first network node (). The session establishment request is sent to a remote network node () from the mobile node ().

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Helsinki, Finland

Janne Esa Petteri Noyranen