Referring to FIG. 1, FIG. 1 is a structural diagram of a transmission control system in an embodiment of the present disclosure. As shown in FIG. 1, the system includes a UE 11 and a base station. In FIG. 1, the base station includes a first base station 12 or a second base station 13. For example, the UE 11 may be UE (User Equipment), for example, it may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), or a mobile device. Terminal-side devices such as a mobile Internet device (MID) or a wearable device (Wearable Device), it should be noted that the type of the UE 11 is not limited in the embodiment of the present disclosure. The UE 11 may establish communication with the first base station 12 and the second base station 13 at the same time. The first base station 12 and the second base station 13 are base stations in two different systems. For example, the above-mentioned first base station 12 may be in the first system, where the first system may be a Long Term Evolution (LTE) system or a 5G New Radio (NR) system, and the second base station 13 may be in the second system, where the second system may be an NR system or an LTE system. That is, the first base station 12 is an LTE base station, and the second base station 13 is an NR base station, or the first base station 12 is an NR base station, and the second base station 13 is an LTE base station.