Support of flexible PDCCH monitoring in new radio (NR)
Technology for a user equipment (UE), operable for monitoring a physical downlink control channel (PDCCH) is disclosed. The UE can monitor a downlink (DL) control channel for DL control information (DCI) at a predetermined monitoring occasion, wherein the predetermined monitoring occasion has a periodicity of P slots or P symbols with an offset Os. The UE can monitor a downlink (DL) control channel for DL control information (DCI) at a predetermined monitoring occasion, wherein Os has San offset with respect to a first slot in subframe number zero (SFN #0). The UE can monitor a downlink (DL) control channel for DL control information (DCI) at a predetermined monitoring occasion, wherein P is a positive integer greater than zero.
1. An apparatus of a user equipment (UE), operable for monitoring a downlink (DL) control channel, the apparatus comprising:
one or more processors configured to:
monitor the downlink (DL) control channel for DL control information (DCI) at predetermined monitoring occasions corresponding to slots of a numerology of the DL control channel, wherein:
the predetermined monitoring occasions have a periodicity of k s slots of the numerology of the DL control channel with an offset O s slots of the numerology of the DL control channel;
O s is an offset with respect to a first slot of the numerology of the DL control channel in subframe number zero (SFN #0); and
k s is a positive integer greater than zero; and
decode, from a higher layer signal, a value of k s and a value of O s , wherein the value of k s and the value of O s are each based on the numerology of the DL control channel; and
a memory interface configured to store in a memory the periodicity, k s ;
wherein a predetermined monitoring occasion of the predetermined monitoring occasions that is in a monitored slot is further offset by a number of symbols with respect to a boundary of the monitored slot, the number of symbols corresponding to a length of one or more reference signals (RSs).
2. The apparatus of the UE of claim 1 , wherein the one or more processors are further configured to monitor a selected number of symbols for DL control channel monitoring for a common search space (CSS) in a control resource set (CORESET) or common CORESET.
3. The apparatus of the UE of claim 1 , wherein the one or more processors are further configured to monitor a selected number of symbols for DL control channel monitoring for a UE-specific search space (USS) in a control resource set (CORESET).
4. The apparatus of the UE of claim 1 , further comprising a transceiver configured to: receive, at the UE, via the higher layer signal, the value of k s and the value of O s .
5. The apparatus of the UE of claim 1 , wherein the UE includes an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, an internal memory, a non-volatile memory port, or combinations thereof.
6. The apparatus of the UE of claim 1 , wherein the numerology of the DL control channel corresponds to a subcarrier spacing of a carrier frequency for the DL control channel.
7. At least one non-transitory machine readable storage medium having instructions embodied thereon for monitoring a downlink (DL) control channel, the instructions when executed by one or more processors at a user equipment (UE) perform the following:
monitoring the downlink (DL) control channel for DL control information (DCI) at predetermined monitoring occasions corresponding to slots of a numerology of the DL control channel, wherein:
the predetermined monitoring occasions have a periodicity of k s slots of the numerology of the DL control channel with an offset O s slots of the numerology of the DL control channel;
O s is an offset with respect to a first slot of the numerology of the DL control channel in subframe number zero (SFN #0); and
k s is a positive integer greater than zero; and
decoding, from a higher layer signal, a value of k s and a value of O s , wherein the value of k s and the value of O s are each based on the numerology of the DL control channel;
wherein a predetermined monitoring occasion of the predetermined monitoring occasions that is in a monitored slot is further offset by a number of symbols with respect to a boundary of the monitored slot, the number of symbols corresponding to a length of one or more reference signals (RSs).
8. The at least one non-transitory machine readable storage medium of claim 7 , further comprising instructions that when executed perform:
monitoring a selected number of symbols for DL control channel monitoring for a common search space (CSS) in a control resource set (CORESET) or common CORESET.
9. The at least one non-transitory machine readable storage medium of claim 8 , further comprising instructions that when executed perform:
monitoring the DL control channel in the CSS in the CORESET or the common CORESET with a minimum period of one slot duration.
10. The at least one non-transitory machine readable storage medium of claim 7 , further comprising instructions that when executed perform:
monitoring a selected number of symbols for DL control channel monitoring for a UE-specific search space (USS) in a control resource set (CORESET).
11. The at least one non-transitory machine readable storage medium of claim 7 , wherein the numerology of the DL control channel corresponds to a subcarrier spacing of a carrier frequency for the DL control channel.
12. A method for a user equipment (UE) to monitor a downlink (DL) control channel, the method comprising:
monitoring the downlink (DL) control channel for DL control information (DCI) at predetermined monitoring occasions corresponding to slot of a numerology of the DL control channel, wherein:
the predetermined monitoring occasions have a periodicity of k s slots of the numerology of the DL control channel with an offset O s slots of the numerology of the DL control channel;
O s is an offset with respect to a first slot of the numerology of the DL control channel in subframe number zero (SFN #0); and
k s is a positive integer greater than zero; and
decoding, a higher layer signal, a value of k s and a value of O s , wherein the value of k s and the value of O s are each based on the numerology of the DL control channel;
wherein a predetermined monitoring occasion of the predetermined monitoring occasions that is in a monitored slot is further offset by a number of symbols with respect to a boundary of the monitored slot, the number of symbols corresponding to a length of one or more reference signals (RSs).
13. The method of claim 12 , further comprising:
monitoring a selected number of symbols for DL control channel monitoring for a common search space (CSS) in a control resource set (CORESET) or common CORESET.
14. The method of claim 13 , further comprising:
monitoring the DL control channel in the CSS in the CORESET or the common CORESET with a minimum period of one slot duration.
15. The method of claim 12 , further comprising:
monitoring a selected number of symbols for DL control channel monitoring for a UE-specific search space (USS) in a control resource set (CORESET).
16. The method of claim 12 , wherein the numerology of the DL control channel corresponds to a subcarrier spacing of a carrier frequency for the DL control channel.