The pros of multi-stage sequences a

The pros of multi-stage sequences are disussed as follows. • Multi-stages sequence can increase power saving signal sequence capacity significatly with low detection complexity. For example, if each one stage sequence is based on length-512 Hadamard sequence, two stages sequences have 512*512=216 sequences combinations and can carry more information bits than that of the same lengh one stage sequence, as shown in Figure 11. If each one stage sequence is based on NR SSS sequence, 1008*1008 sequences combinations can be achieved to transmit near 20 information bis. • As multi-stage sequence provide compareble ability of carrying multiple information bits with DCI, UEID， Cell ID, BWP index，WUS transmissin resources information, etc., can be indicted using sequence based WUS. • 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.