A method for Internet Protocol, IP, Point of Presence, POP, change for a user equipment, UE, in a communication architecture having a user plane for packet data communication of user data and a control plane for controlling the packet data communication, wherein the communication architecture i) supports Internet Protocol version 4, IPv4, and ii) comprises a first Connectivity Handling Function-Unit, CHF-U, a second CHF-U, a first IP POP, a second IP POP and a Control Plane-Function Unit, CP-FU,, the method comprising: (a) managing (S1, S2) a first communication path in the user plane between the UE and the first IP POP having a first IP address (IP@L1), the first communication path having a first uplink path and a first downlink path; (b) deciding (S3, S4, S5, S6, S7), by the CP-FU in the control plane, on an IP POP change to a second communication path in the user plane between the UE and the second IP POP having a second IP address (IP@L2), the second communication path having a second uplink path and a second downlink path, wherein the first communication path and the second communication path share a common radio bearer; and (c) performing (S8, S9, S10, S11, S12), in the control plane, the IP POP change from the first communication path to the second communication path, wherein the IP POP change is effected by: i. preparing the second communication path by a Prepare Path message to the second CHF-U conveying the second IP address and other parameters comprising a tunnel endpoint identifier, TEID, and an ID of target base station, wherein undesired use of the second downlink path at this time is precluded by firewall settings in the second CHF-U; ii. switching, via a CP command issued from the CP-FU to the target base station, from the first uplink path to the second uplink path; iii. assigning the second IP address to the UE and notifying the second IP address from the CP-FU to the UE by using separate signalling; iv. activating, by removing the firewall settings, the second downlink path following receipt by the UE of the second IP address; and v. releasing the first downlink path. (a) managing (S1, S2) a first communication path in the user plane between the UE and the first IP POP having a first IP address (IP@L1), the first communication path having a first uplink path and a first downlink path; (b) deciding (S3, S4, S5, S6, S7), by the CP-FU in the control plane, on an IP POP change to a second communication path in the user plane between the UE and the second IP POP having a second IP address (IP@L2), the second communication path having a second uplink path and a second downlink path, wherein the first communication path and the second communication path share a common radio bearer; and (c) performing (S8, S9, S10, S11, S12), in the control plane, the IP POP change from the first communication path to the second communication path, wherein the IP POP change is effected by: i. preparing the second communication path by a Prepare Path message to the second CHF-U conveying the second IP address and other parameters comprising a tunnel endpoint identifier, TEID, and an ID of target base station, wherein undesired use of the second downlink path at this time is precluded by firewall settings in the second CHF-U; ii. switching, via a CP command issued from the CP-FU to the target base station, from the first uplink path to the second uplink path; iii. assigning the second IP address to the UE and notifying the second IP address from the CP-FU to the UE by using separate signalling; iv. activating, by removing the firewall settings, the second downlink path following receipt by the UE of the second IP address; and v. releasing the first downlink path. i. preparing the second communication path by a Prepare Path message to the second CHF-U conveying the second IP address and other parameters comprising a tunnel endpoint identifier, TEID, and an ID of target base station, wherein undesired use of the second downlink path at this time is precluded by firewall settings in the second CHF-U; ii. switching, via a CP command issued from the CP-FU to the target base station, from the first uplink path to the second uplink path; iii. assigning the second IP address to the UE and notifying the second IP address from the CP-FU to the UE by using separate signalling; iv. activating, by removing the firewall settings, the second downlink path following receipt by the UE of the second IP address; and v. releasing the first downlink path.