说明：  对输入的第iUE个用户的第iTB个传输块进行码块分割。若输入信息b长度小于常数Z，则不进行分割；否则依据[2]第5.1.3.2.3节定义的分割大小进行码块分割，并对分割后的数据添加CRC24B校验。
(Input iUE the user iTB transmission blocks, code block segmentation. If the input b length less than the constant Z is not split otherwise in accordance with the defined partition size [2] section 5.1.3.2.3 code block segmentation and segmentation data Add CRC24B checksum.)