Estimating a narrowband reference signal received power parameter
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a plurality of master information blocks (MIBs) on a narrowband physical broadcast channel (NPBCH). The UE may determine an NPBCH signal power based at least in part on the plurality of MIBs. The UE may estimate a narrowband reference signal received power (NRSRP) parameter based at least in part on the NPBCH signal power. In some aspects, a base station may determine whether to enable or disable NPBCH-based estimates of an NRSRP parameter for a UE. The base station may transmit, to the UE, an indication of whether NPBCH-based estimates of the NRSRP parameter are enabled or disabled for the UE based at least in part on the determination. Numerous other aspects are provided.
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving a plurality of master information blocks (MIBs) on a narrowband physical broadcast channel (NPBCH);
determining an NPBCH signal power based at least in part on the plurality of MIBs; and
estimating a narrowband reference signal received power (NRSRP) parameter based at least in part on the NPBCH signal power.
2. The method of claim 1 , wherein the NRSRP parameter is estimated using the NPBCH signal power and a ratio between the NPBCH signal power and a signal power associated with a set of narrowband reference signals.
3. The method of claim 1 , wherein the NRSRP parameter is estimated using the NPBCH signal power based at least in part on an indication, from a base station, that NPBCH-based NRSRP estimates are enabled for the UE.
4. The method of claim 1 , further comprising receiving an indication, from a base station, of whether NPBCH-based NRSRP estimates are enabled or disabled for the UE.
5. The method of claim 4 , wherein the indication is received in a system information block (SIB) associated with a cell.
6. The method of claim 1 , wherein the NRSRP parameter is estimated for a serving cell.
7. The method of claim 1 , wherein using the NPBCH signal power reduces at least one of a discontinuous reception (DRX) cycle wake time or an NRSRP measurement period for the UE as compared to estimating the NRSRP parameter using only a set of narrowband reference signals.
8. The method of claim 1 , wherein determining the NPBCH signal power comprises:
decoding a first MIB of the plurality of MIBs;
generating a reference MIB using the decoded first MIB; and
comparing the reference MIB and a second MIB of the plurality of MIBs.
9. The method of claim 1 , further comprising estimating the NRSRP parameter using a set of narrowband reference signals based at least in part on a determination that semi-static content, included in the plurality of MIBs, has changed.
10. The method of claim 1 , further comprising disabling narrowband reference signal measurements based at least in part on a determination that a correlation value associated with the plurality of MIBs satisfies a threshold.
11. The method of claim 1 , wherein the NRSRP parameter is estimated using only the NPBCH signal power and not a signal power determined for a set of narrowband reference signals.
12. The method of claim 1 , wherein the NRSRP parameter is estimated using the NPBCH signal power and a signal power determined for a set of narrowband reference signals.
13. A method of wireless communication performed by a base station, comprising:
determining whether to enable or disable narrowband physical broadcast channel (NPBCH)-based estimates of a narrowband reference signal received power (NRSRP) parameter for a user equipment (UE); and
transmitting, to the UE, an indication of whether NPBCH-based estimates of the NRSRP parameter are enabled or disabled for the UE based at least in part on the determination.
14. The method of claim 13 , wherein the determination is based at least in part on a relative power between NPBCH transmissions and narrowband reference signal (NRS) transmissions.
15. The method of claim 13 , wherein the determination is based at least in part on a frequency with which content of a master information block (MIB) change.
16. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
receive a plurality of master information blocks (MIBs) on a narrowband physical broadcast channel (NPBCH);
determine an NPBCH signal power based at least in part on the plurality of MIBs; and
estimate a narrowband reference signal received power (NRSRP) parameter based at least in part on the NPBCH signal power.
17. The UE of claim 16 , wherein the NRSRP parameter is estimated using the NPBCH signal power and a ratio between the NPBCH signal power and a signal power associated with a set of narrowband reference signals.
18. The UE of claim 16 , wherein the NRSRP parameter is estimated using the NPBCH signal power based at least in part on an indication, from a base station, that NPBCH-based NRSRP estimates are enabled for the UE.
19. The UE of claim 16 , wherein the one or more processors are further configured to receive an indication, from a base station, of whether NPBCH-based NRSRP estimates are enabled or disabled for the UE.
20. The UE of claim 19 , wherein the indication is received in a system information block (SIB) associated with a cell.
21. The UE of claim 16 , wherein the NRSRP parameter is estimated for a serving cell.
22. The UE of claim 16 , wherein using the NPBCH signal power reduces at least one of a discontinuous reception (DRX) cycle wake time or an NRSRP measurement period for the UE as compared to estimating the NRSRP parameter using only a set of narrowband reference signals.
23. The UE of claim 16 , wherein the one or more processors, when determining the NPBCH signal power, are configured to:
decode a first MIB of the plurality of MIBs;
generate a reference MIB using the decoded first MIB; and
compare the reference MIB and a second MIB of the plurality of MIBs.
24. The UE of claim 16 , wherein the one or more processors are further configured to estimate the NRSRP parameter using a set of narrowband reference signals based at least in part on a determination that semi-static content, included in the plurality of MIBs, has changed.
25. The UE of claim 16 , wherein the one or more processors are further configured to disable narrowband reference signal measurements based at least in part on a determination that a correlation value associated with the plurality of MIBs satisfies a threshold.
26. The UE of claim 16 , wherein the NRSRP parameter is estimated using only the NPBCH signal power and not a signal power determined for a set of narrowband reference signals.
27. The UE of claim 16 , wherein the NRSRP parameter is estimated using the NPBCH signal power and a signal power determined for a set of narrowband reference signals.
28. A base station for wireless communication, comprising:
a memory; and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
determine whether to enable or disable narrowband physical broadcast channel (NPBCH)-based estimates of a narrowband reference signal received power (NRSRP) parameter for a user equipment (UE); and
transmit, to the UE, an indication of whether NPBCH-based estimates of the NRSRP parameter are enabled or disabled for the UE based at least in part on the determination.
29. The base station of claim 28 , wherein the determination is based at least in part on a relative power between NPBCH transmissions and narrowband reference signal (NRS) transmissions.
30. The base station of claim 28 , wherein the determination is based at least in part on a frequency with which content of a master information block (MIB) change.