DRX for narrowband transmissions
In narrowband communication, channels may use repetitions in multiple subframes. SPS and DRX for the narrowband communication may not accommodate such repetitions, because repetitions for a channel may fall only partially within a DRX ON duration. An apparatus addresses this problem by determining a DRX ON duration, determining a set of subframes carrying a narrowband PDCCH candidate and determining that the DRX ON duration at least partially overlaps with the set of subframes of the narrowband PDCCH. The apparatus then refrains from decoding the first narrowband PDCCH candidate, decodes the first narrowband PDCCH candidate, or extends the DRX ON duration to include the set of subframes entirely and decoding the first narrowband PDCCH candidate carried in the set of subframes in the extended DRX ON duration. The apparatus may also determine DRX configuration parameters based on parameters of bundled channels, and handle invalid subframes for an SPS grant.
1. A method of wireless communication at a user equipment (UE), comprising:
determining a parameter of a narrowband physical downlink control channel (PDCCH) candidate monitored by the UE, wherein the parameter relates to a repetition of the narrowband PDCCH candidate;
receiving an indication associated with a discontinuous reception (DRX) configuration of the UE;
determining, at the UE, a DRX configuration parameter, the DRX configuration parameter being a function of the parameter of the narrowband PDCCH candidate and the indication; and
performing DRX based on the DRX configuration parameter determined by the UE.
2. The method of claim 1 , wherein the parameter of the narrowband PDCCH candidate comprises a repetition level of the narrowband PDCCH candidate.
3. The method of claim 1 , wherein the indication comprises a number of subframes for which the UE should monitor for the narrowband PDCCH candidate.
4. The method of claim 1 , wherein the indication comprises a number of subframes for which the UE should monitor for the narrowband PDCCH candidate, the method further comprising:
determining a repetition level for each of a plurality of narrowband PDCCH candidates monitored by the UE; and
determining, at the UE, a DRX ON duration as a function of the indication and a maximum repetition level for the plurality of narrowband PDCCH candidates.
5. An apparatus for wireless communication at a user equipment (UE), comprising:
means for determining a parameter of a narrowband physical downlink control channel (PDCCH) candidate monitored by the UE, wherein the parameter relates to a repetition of the narrowband PDCCH candidate;
means for receiving an indication associated with a discontinuous reception (DRX) configuration of the UE;
means for determining, at the UE, a DRX configuration parameter, the DRX configuration parameter being a function of the parameter of the narrowband PDCCH candidate and the indication; and
means for performing DRX based on the DRX configuration parameter determined by the UE.
6. The apparatus of claim 5 , wherein the parameter of the narrowband PDCCH candidate comprises a repetition level of the narrowband PDCCH candidate.
7. The apparatus of claim 5 , wherein the indication comprises a number of subframes for which the UE should monitor for the narrowband PDCCH candidate.
8. The apparatus of claim 5 , wherein the indication comprises a number of subframes for which the UE should monitor for the narrowband PDCCH candidate, wherein the means for determining the parameter determines a repetition level for each of a plurality of narrowband PDCCH candidates monitored by the UE, and wherein the means for determining the DRX configuration parameter determines a DRX ON duration as a function of the indication and a maximum repetition level for the plurality of narrowband PDCCH candidates.
9. An apparatus for wireless communication at a user equipment (UE), comprising:
a memory; and
at least one processor coupled to the memory and configured to:
determine a parameter of a narrowband physical downlink control channel (PDCCH) candidate monitored by the UE, wherein the parameter relates to a repetition of the narrowband PDCCH candidate;
receive an indication associated with a discontinuous reception (DRX) configuration of the UE;
determine, at the UE, a DRX configuration parameter, the DRX configuration parameter being a function of the parameter of the narrowband PDCCH candidate and the indication; and
perform DRX based on the DRX configuration parameter determined by the UE.
10. The apparatus of claim 9 , wherein the parameter of the narrowband PDCCH candidate comprises a repetition level of the narrowband PDCCH candidate.
11. The apparatus of claim 9 , wherein the indication comprises a number of subframes for which the UE should monitor for the narrowband PDCCH candidate.
12. The apparatus of claim 9 , wherein the indication comprises a number of subframes for which the UE should monitor for the narrowband PDCCH candidate, wherein the at least one processor determines the parameter by determining a repetition level for each of a plurality of narrowband PDCCH candidates monitored by the UE, and wherein the at least one processor determines a DRX ON duration as a function of the indication and a maximum repetition level for the plurality of narrowband PDCCH candidates.
13. A non-transitory computer-readable medium storing computer executable code for wireless communication at a user equipment (UE), comprising code to:
determine a parameter of a narrowband physical downlink control channel (PDCCH) candidate monitored by the UE, wherein the parameter relates to a repetition of the narrowband PDCCH candidate;
receive an indication associated with a discontinuous reception (DRX) configuration of the UE;
determine; at the UE, a DRX configuration parameter, the DRX configuration parameter being a function of the parameter of the narrowband PDCCH candidate and the indication; and
performing DRX based on the DRX configuration parameter determined by the UE.
14. The non-transitory computer-readable medium of claim 13 , wherein the parameter of the narrowband PDCCH candidate comprises a repetition level of the narrowband PDCCH candidate.
15. The non-transitory computer-readable medium of claim 13 , wherein the indication comprises a number of subframes for which the UE should monitor for the narrowband PDCCH candidate.
16. The non-transitory computer-readable medium of claim 13 , wherein the indication comprises a number of subframes for which the UE should monitor for the narrowband PDCCH candidate, and further comprising code to determine the parameter by determining a repetition level for each of a plurality of narrowband PDCCH candidates monitored by the UE, and code to determine a DRX ON duration as a function of the indication and a maximum repetition level for the plurality of narrowband PDCCH candidates.