Abstract: Systems and methods for data transmission are disclosed. A network access entity (3) is configured to provide access to communication services of a data network (10) to at least one user equipment, UE, (50). The network access entity (3) includes a packet data network gateway, PGW, (32) with a PGW identifier, PGWID, which uniquely identifies the PGW, and a UE mobility table (36) containing an assignment of a UE identifier, UEID, of each one of the at least one UE to a PGW, wherein the assignment indicates a PGWID of a PGW via which a specific UE is accessible from the data network.