A method performed by a policy and charging rules node, PCRN, for handling an incoming request message, the method comprising: receiving, at the PCRN, a request message from an Evolved Packet Core node; determining whether the request message includes a request for a modification to an internet protocol connectivity access network, IP-CAN session; and if the request message includes a request for a modification to the IP-CAN session: determining a current bearer control mode for the IP-CAN session to be modified, determining a previous bearer control mode for the IP-CAN session, if the request message includes a request for a modification to the IP-CAN session the method comprises the further steps of: comparing the current bearer control mode to the previous bearer control mode, and if the current bearer control mode is different from the previous bearer control mode, modifying the IP-CAN session according to the current bearer control mode; the method further comprising the steps of: determining whether the request message includes a request for an establishment of a new gateway control session; and if the request message includes a request for an establishment of a new gateway control session, referring to at least one external rule to determine a bearer control mode for an IP-CAN session associated with the requested new gateway control session, characterized by the further steps of determining whether the new gateway control session is a service gateway pre-registration; if the new gateway control session is a service gateway pre-registration, determining whether the bearer control mode for an IP-CAN session associated with the new gateway control session is user equipment - network, UE_NW; and if the bearer control mode for an IP-CAN session associated with the new gateway control session is UE_NW, indicating to a serving gateway, SGW that it should install at least one QoS rule. receiving, at the PCRN, a request message from an Evolved Packet Core node; determining a current bearer control mode for the IP-CAN session to be modified, determining a previous bearer control mode for the IP-CAN session, comparing the current bearer control mode to the previous bearer control mode, and if the current bearer control mode is different from the previous bearer control mode, modifying the IP-CAN session according to the current bearer control mode; determining whether the request message includes a request for an establishment of a new gateway control session; and if the request message includes a request for an establishment of a new gateway control session, referring to at least one external rule to determine a bearer control mode for an IP-CAN session associated with the requested new gateway control session, determining whether the new gateway control session is a service gateway pre-registration; if the new gateway control session is a service gateway pre-registration, determining whether the bearer control mode for an IP-CAN session associated with the new gateway control session is user equipment - network, UE_NW; and if the bearer control mode for an IP-CAN session associated with the new gateway control session is UE_NW, indicating to a serving gateway, SGW that it should install at least one QoS rule.