• For multi-stages sequence, if previous stage sequence is not found, UE will not perform detection on next stage sequence, which is beneficail of UE energy saving. • For the same sequence multiplexing capacity, multi-stage sequence have better performance for the case of waking up large number of UEs simultaneously. For example, to support 16 UEs, two stage sequences need 4 sequences overlap on each stage sequence, but 16 sequences overlap is needed for one stage sequence. Oboviously, the former has much better perofmance than later as fewer sequence multiplxing means higher received SNR and the evaluation result is given in Figure 12. • Multi-stage sequence are not sensitive to time/frequency offset and proper design of sequence patterns can provide comprable channel tracking ability with NR TRS. Contrast to PDCCH reception, sequence used for fine syncronization is not needed for multi-stage seuqnce.