Method, performed by an apparatus, for providing a user plane address for a mobile transceiver in a mobile communication system further comprising at least one mobile communication system infrastructure entity communicating with the mobile transceiver via a user plane communication channel , the mobile transceiver being controlled via a control plane communication channel and comprising a first network interface (NI1) and a second network interface (NI2), the method comprising: obtaining a control plane address for the mobile transceiver ; determining a first user plane address associated with said first network interface (NI1) of the mobile transceiver reversibly mapped to said control plane address and a first network interface identifier characterizing said first network interface (NI1); determining a second user plane address associated with said second network interface (NI2) of the mobile transceiver reversibly mapped to said control plane address and a second network interface identifier characterizing said second network interface (NI2); providing said first and second user plane address; wherein the network interface identifier is an identifier identifying a primary or secondary cell, said network interface identifier being a ServCellIndex parameter, and wherein the control plane address corresponds to at least one element of the group of a Temporary Mobile Subscriber Identity, a System Architecture Evolution Temporary Mobile Subscriber Identity, International Mobile Subscriber Identity, and Globally Unique Temporary user equipment Identity and wherein the providing said first and second user plane address comprises: transmitting the first and second user plane address to the mobile transceiver ; and using the first and second user plane address for forwarding packets to its destination. obtaining a control plane address for the mobile transceiver ; determining a first user plane address associated with said first network interface (NI1) of the mobile transceiver reversibly mapped to said control plane address and a first network interface identifier characterizing said first network interface (NI1); determining a second user plane address associated with said second network interface (NI2) of the mobile transceiver reversibly mapped to said control plane address and a second network interface identifier characterizing said second network interface (NI2); providing said first and second user plane address; wherein the network interface identifier is an identifier identifying a primary or secondary cell, said network interface identifier being a ServCellIndex parameter, and wherein the control plane address corresponds to at least one element of the group of a Temporary Mobile Subscriber Identity, a System Architecture Evolution Temporary Mobile Subscriber Identity, International Mobile Subscriber Identity, and Globally Unique Temporary user equipment Identity and wherein the providing said first and second user plane address comprises: transmitting the first and second user plane address to the mobile transceiver ; and using the first and second user plane address for forwarding packets to its destination. transmitting the first and second user plane address to the mobile transceiver ; and using the first and second user plane address for forwarding packets to its destination. <EOS>