A method for hierarchically storing data connection information in network nodes of a mobile radio network which is designed to transmit data packets in accordance with an IP-based tunnel protocol, comprising the following method steps: a) defining a plurality of different data traffic classes; b) providing, by a mobile radio-capable device , using the IP-based tunnel protocol a data connection establishment message for establishing a data connection via the mobile radio network to a destination device connectable to the mobile radio network , the data connection establishment message containing information for identifying one of the plurality of data traffic classes; c) transmitting the data connection establishment message provided in step b) to a core network of the mobile radio network ; d) establishing, by the core network , in response to the data connection establishment message an IP-based tunnel connection between a first network node of the core network associated with the mobile radio-capable device and a second network node of the core network associated with the destination device ; e) assigning, by the core network , a unique tunnel identifier of the IP-based tunnel connection established in step d); f) determining, by the first network node and by the second network node , in each case by evaluating the identification information contained in the data connection establishment message the data traffic class assigned to the data connection establishment message; g) hierarchically storing, in the first network node and in the second network node , each at least partially the data connection establishment message and the unique tunnel identifier assigned to the IP-based tunnel connection in step e) as a data connection information depending on the data traffic class determined in step f); and h) repeating steps b) to g) for at least one further mobile radio-capable device . a) defining a plurality of different data traffic classes; b) providing, by a mobile radio-capable device , using the IP-based tunnel protocol a data connection establishment message for establishing a data connection via the mobile radio network to a destination device connectable to the mobile radio network , the data connection establishment message containing information for identifying one of the plurality of data traffic classes; c) transmitting the data connection establishment message provided in step b) to a core network of the mobile radio network ; d) establishing, by the core network , in response to the data connection establishment message an IP-based tunnel connection between a first network node of the core network associated with the mobile radio-capable device and a second network node of the core network associated with the destination device ; e) assigning, by the core network , a unique tunnel identifier of the IP-based tunnel connection established in step d); f) determining, by the first network node and by the second network node , in each case by evaluating the identification information contained in the data connection establishment message the data traffic class assigned to the data connection establishment message; g) hierarchically storing, in the first network node and in the second network node , each at least partially the data connection establishment message and the unique tunnel identifier assigned to the IP-based tunnel connection in step e) as a data connection information depending on the data traffic class determined in step f); and h) repeating steps b) to g) for at least one further mobile radio-capable device . <EOS>