2.2 UL BPL indication through BPL index indication: a method of sharing a BPL to be used for UL transmission by providing notification of the index of a BPL through BM. If the case of FIG. 1 is taken as an example, the method is a method in which the number of BPLs formed between the base station and the terminal is three and the base station notifies the terminal of the index of a BPL that belongs to the BPL #1 to the BPL #3 and that is activated for UL BPL indication.

2.3 UL BPL indication through beam index indication: a method of sharing a BPL to be used for UL transmission by providing notification of a beam index used for beam sweep in a BM process. It is assumed that in a DL BM process, a base station performs beam sweep using 16 beams and a terminal formed BPLs by reporting the four preferred beams of the 16 beams to the base station. In this case, since the four BPLs are formed, there is a difference in that for UL BPL indication, an activated BPL of the 4 candidates is notified in Method 2.2, whereas an activated BPL of the 16 candidates is notified in Method 2.3.

FIG. 2 is a diagram showing a process of applying a beam used for UL transmission through the indication if a beam association has been activated according to a first embodiment of the disclosure.