Method of determining transport block size and device thereof, synchronization method, apparatus and system

The invention discloses a method of determining a transport block size and a device thereof, a synchronization method, an apparatus and a system. The synchronization method comprises the steps of an eNB obtaining the number of frequency-domain physical resource blocks and a modulation and coding scheme index of a UE; determining a temporary transport block size based on the number of frequency-domain physical resource blocks and the modulation and coding scheme index; determining a scale factor of a transmission time interval bundling transmission block size based on the temporary transport block size and/or a transmission time interval bundling size; determining the transmission time interval bundling transport block size based on the scale factor and the temporary transport block size; and notifying the UE of the scale factor of the transmission time interval bundling transmission block size, the number of frequency-domain physical resource blocks and the modulation and coding scheme index, or notifying the UE of the number of frequency-domain physical resource blocks and the modulation and coding scheme index to trigger the UE to synchronize the transport block size. According to the invention, the transmission time interval bundling transmission block size is synchronized, and thus the effect of improving uplink coverage is achieved.