In NB-IoT WUS sequence, single ZC base sequence is adopted for waking up one group of UEs associated the same PO. To address the problem of unnecessary power consumption caused by group specific WUS, a direct solution is that multiple base sequences can be used as a group for indicating different UEs in one group. Enhanced NB-IoT WUS sequence is generated as shown in Figure 9. Base sequences can be used to wake up multiple users simultaneously and cover sequences can used to differentiate different cells.