16.9 UE procedure for receiving narrowband wake up signal
36.2133GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Physical layer proceduresRelease 17TS
A NB-IoT UE can be configured with up to two NWUS [14]. A UE may assume that no more than one NWUS sequence is transmitted per NWUS resource at a given time.
A NB-IoT UE using NWUS can assume the actual duration of NWUS is one of the values in the set listed in Table 16.9-1 corresponding to the maximum duration of NWUS, , configured by higher layers. There is a total of NB-IoT DL subframes and subframes #4 carrying SystemInformationBlockType1-NB in the maximum duration of NWUS. The NWUS starts in subframe w0, where w0 is the latest subframe such that there is a total of 
NB-IoT DL subframes and subframes #4 carrying SystemInformationBlockType1-NB in the duration that ends in subframe (g0-1), where g0 is defined by [14] and is the NWUS resource that the UE is associated to as defined in [3]. The UE may assume that NWUS and its associated NB-IoT paging occasion subframes are on the same NB-IoT carrier.
Table 16.9-1: Actual NWUS durations in NB-IoT DL subframes or subframes containing SystemInformationBlockType1-NB.
|
Actual NWUS durations set |
|
|
1 |
{1} |
|
2 |
{1, 2} |
|
4 |
{1, 2, 4} |
|
8 |
{1, 2, 4, 8} |
|
16 |
{1, 2, 4, 8, 16} |
|
32 |
{1, 2, 4, 8, 16, 32} |
|
64 |
{1, 2, 4, 8, 16, 32, 64} |
|
128 |
{1, 2, 4, 8, 16, 32, 64, 128} |
|
256 |
{1, 2, 4, 8, 16, 32, 64, 128, 256} |
|
512 |
{1, 2, 4, 8, 16, 32, 64, 128, 256, 512} |
|
1024 |
{1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024} |
A NB-IoT UE using NWUS can assume there are at least 10 NB-IoT DL subframes between the end of the maximum duration of NWUS and the first associated NB-IoT paging occasion subframe.