A network node adapted to support at least two different radio access technologies, RATs, comprising: a first radio resource control, RRC, component; a second RRC component; and at least one processor configured to: a) activate the first RRC, component corresponding to a first RAT, wherein the first RAT is a default RAT of a mobile terminal configured to communicate with the network node, wherein the network node is a master node that is adapted to comprise connection contexts and to control and coordinate communications from different transmission nodes utilizing different RATs; b) determine whether a second RAT is available to the mobile terminal based on at least one predetermined criterion; and c) if the second RAT is available, activate the second RRC component corresponding to the second RAT, wherein both the first RAT and the second RAT are active at a same time to communicate with the mobile terminal; d) re-configure a radio link of the mobile terminal with a new media access control, MAC, layer process and a physical, PHY layer process to provide a new radio link branch corresponding to the second RAT; and e) re-configure a mapping between logical channels and transport channels to provide at least one transport channel corresponding to the second RAT. a first radio resource control, RRC, component; a second RRC component; and at least one processor configured to: a) activate the first RRC, component corresponding to a first RAT, wherein the first RAT is a default RAT of a mobile terminal configured to communicate with the network node, wherein the network node is a master node that is adapted to comprise connection contexts and to control and coordinate communications from different transmission nodes utilizing different RATs; b) determine whether a second RAT is available to the mobile terminal based on at least one predetermined criterion; and c) if the second RAT is available, activate the second RRC component corresponding to the second RAT, wherein both the first RAT and the second RAT are active at a same time to communicate with the mobile terminal; d) re-configure a radio link of the mobile terminal with a new media access control, MAC, layer process and a physical, PHY layer process to provide a new radio link branch corresponding to the second RAT; and e) re-configure a mapping between logical channels and transport channels to provide at least one transport channel corresponding to the second RAT. a) activate the first RRC, component corresponding to a first RAT, wherein the first RAT is a default RAT of a mobile terminal configured to communicate with the network node, wherein the network node is a master node that is adapted to comprise connection contexts and to control and coordinate communications from different transmission nodes utilizing different RATs; b) determine whether a second RAT is available to the mobile terminal based on at least one predetermined criterion; and c) if the second RAT is available, activate the second RRC component corresponding to the second RAT, wherein both the first RAT and the second RAT are active at a same time to communicate with the mobile terminal; d) re-configure a radio link of the mobile terminal with a new media access control, MAC, layer process and a physical, PHY layer process to provide a new radio link branch corresponding to the second RAT; and e) re-configure a mapping between logical channels and transport channels to provide at least one transport channel corresponding to the second RAT.