Data processing method, apparatus and system for reducing redundant length information

A data processing method for reducing redundant length information is provided. At the higher layer of the two adjacent layers of protocol layers, at least one higher layer data block is encapsulated to a higher layer frame. At the lower layer of the two adjacent layers, the data from at least one higher layer frame is encapsulated to a lower layer frame. The lower layer frame header only carries the necessary length information of every higher layer data block without the redundant length information that is the total length information of every higher layer frame. The corresponding data processing device, mobile terminal, base station and mobile communication system are provided. The redundant length information in the wireless transmission is reduced, thus the wireless resource is efficiently saved.