realized by using the mac layer activating deactivating control signaling in the message the explicit activating command or the explicit deactivating command can be multiplexed as can be seen from above the activating deactivating process of the uplink of a secondary cell may be performed explicitly or implicitly as required by the different scenarios thus the design of the activating deactivating control signaling may consider the differences of the different scenarios the mac sub header of the mac layer activating deactivating control signaling may be of the format shown in the following table in which the digit in parentheses represents the number of bits in the above table the first identification r 1 has 1 bit the second identification r 1 has 1 bit and the third identification e indicates whether there is another sub header following the current sub header 1 represents that there is another sub header following the current sub header and 0 in parentheses represents that there is not another sub header following the current sub header lcid logical channel id identifies the logical channel instants for activating deactivating mac payload may use the format as shown in the following table when the ue uses the ca transmission mode each added cell may be allocated a cell index the table shows an example in which the ue can aggregate at most 5 cells in this example 5 bits are sufficient to indicate the activating deactivating process of the ue under ca mode the meaning of each bit is explained as follows cell 0 activating or deactivating a cell with a cell index of 0 the value 1 indicates activating and.