The Congress venue can be reached easily from all directions with Deutsche Bahn trains. The closest railway stations are the east and central railway stations (Ostbahnhof and Hauptbahnhof). Berlin also has two airports, which are well connected to the local public transport system - the nearest airport is Berlin-Tegel.
Berlin's excellent connection to the motorway network and the city's first-rate infrastructure make it a place that is easy to reach. (You will be sent precise directions with your reservation confirmation.)