| abstract |
A method by a User Equipment (UE) is described. The method includes establishing a first radio interface between the UE and a first point on an Evolved Universal Terrestrial Radio Access Network (E-UTRAN). The method also includes establishing a second radio interface between the UE and a second point on the E-UTRAN by using the first radio interface. The method further includes mapping data radio bearers (DRBs) to at least one of the first radio interface and the second radio interface. |