A method performed in a Radio Access Network, RAN, of a communication network used by a service client for service level communication with a service provider , in which communication network there is a first and a second communication bearer between a radio device , comprising the service client, and a core network, CN, of the communication network via the RAN, where the second communication bearer is associated with the service level communication, for establishing an interaction session on the second communication bearer between an Interaction Gateway, IGW, of the RAN and the service client for controlling the service level communication, the method comprising: obtaining (S1) an initialization message addressed to the RAN by means of default IGW address information on the first communication bearer , for initiating the interaction session , the initialization message comprising service level address information used for the service level communication on the service provider side; determining (S2) dedicated IGW address information for the interaction session ; initiating (S3) sending of a confirmation message comprising the determined (S2) dedicated IGW address information to the service client ; ensuring (S4) that the interaction session , using the dedicated IGW address information , is associated with the second communication bearer used for the service level communication ; obtaining (S5) an interaction session message addressed to the RAN by means of the determined (S2) dedicated IGW address information on the second communication bearer ; and initiating (S6) sending a response to the interaction session message , to the service client in the radio device on the second communication bearer , wherein the ensuring (S4) comprises initiating sending a message comprising the determined (S2) dedicated IGW address information as well as the service level address information to an Application Function, for initiating setting up of a filter in the CN for mapping IP data packets associated with the determined dedicated IGW address information to the second communication bearer . obtaining (S1) an initialization message addressed to the RAN by means of default IGW address information on the first communication bearer , for initiating the interaction session , the initialization message comprising service level address information used for the service level communication on the service provider side; determining (S2) dedicated IGW address information for the interaction session ; initiating (S3) sending of a confirmation message comprising the determined (S2) dedicated IGW address information to the service client ; ensuring (S4) that the interaction session , using the dedicated IGW address information , is associated with the second communication bearer used for the service level communication ; obtaining (S5) an interaction session message addressed to the RAN by means of the determined (S2) dedicated IGW address information on the second communication bearer ; and initiating (S6) sending a response to the interaction session message , to the service client in the radio device on the second communication bearer , wherein the ensuring (S4) comprises initiating sending a message comprising the determined (S2) dedicated IGW address information as well as the service level address information to an Application Function, for initiating setting up of a filter in the CN for mapping IP data packets associated with the determined dedicated IGW address information to the second communication bearer . <EOS>