Beam based downlink control signaling
Disclosed herein are methods, systems, and devices that are associated with downlink (DL) control, grant free (GF) transmission, or initial access. Particularly, disclosed herein are multi beam physical downlink control channel (PDCCH) transmission mechanisms, grant free transmissions mechanisms, demodulation reference signal (DMRS) for physical broadcast channel (PBCH) mechanisms, and DMRS sequence design for new radio-channel state information-reference signal (NR-CSI-RS) and new radio-physical downlink shared channel (PDSCH) (NR-PDSCH), among other things.
1. A method comprising:
monitoring, by a wireless transmit/receive unit (WTRU), in one or more monitoring occasions for control information,
wherein the control information is received using a first beam, wherein the first beam is based on a physical downlink control channel (PDCCH) quasi co-located with a synchronization signal block (SSB); and
based on the one or more monitoring occasions, receiving, by the WTRU, downlink control channel spatial information using the first beam,
wherein the SSB is received using a second beam and the physical downlink control channel (PDCCH) transmission is received using the first beam, wherein the first beam and the second beam are received from a same direction and the SSB and PDCCH transmission are quasi co-located with respect to spatial quasi co-location parameters.
2. The method of claim 1 , wherein the one or more monitoring occasions are different for different types of control resource sets.
3. The method of claim 1 , wherein the one or more monitoring occasions are configured using radio resource control (RRC) signaling.
4. The method of claim 1 , further comprising obtaining multiple downlink control informations (DCIs), wherein each of the multiple DCIs indicate a respective physical downlink shared channel grant, wherein each of the multiple DCIs indicate a same respective frequency resource for the respective physical downlink shared channel grant.
5. The method of claim 1 , further comprising activating or deactivating grant free resources based on downlink control information.
6. The method of claim 1 , further comprising obtaining time and frequency resources for grant free transmission based on downlink control information.
7. The method of claim 1 , further comprising transmitting control signaling for a grant free resource in uplink control information, wherein the transmission comprises user equipment identifier.
8. An apparatus comprising:
a processor; and
memory coupled with the processor, the memory comprising executable instructions stored thereon that when executed by the processor cause the processor to effectuate operations comprising:
monitoring in one or more monitoring occasions for control information,
wherein the control information is received using a first beam, wherein the first beam is based on a physical downlink control channel (PDCCH) quasi co-located with a synchronization signal block (SSB); and
based on the one or more monitoring occasions, receiving downlink control channel spatial information using the first beam,
wherein the SSB is received using a second beam and the physical downlink control channel (PDCCH) transmission is received using the first beam, wherein the first beam and the second beam are received from a same direction and the SSB and PDCCH transmission are quasi co-located with respect to spatial quasi co-location parameters.
9. The apparatus of claim 8 , wherein the apparatus is a wireless transmit/receive unit (WTRU).
10. The apparatus of claim 8 , the operations further comprising obtaining multiple downlink control informations (DCIs), wherein each of the multiple DCIs indicate a respective physical downlink shared channel grant, wherein each of the multiple DCIs indicate a same respective frequency resource for the respective physical downlink shared channel grant.
11. The apparatus of claim 8 , the operations further comprising activating or deactivating grant free resources based on downlink control information.
12. The apparatus of claim 8 , the operations further comprising obtaining time and frequency resources for grant free transmission based on downlink control information.
13. The apparatus of claim 8 , the operations further comprising transmitting control signaling for a grant free resource in uplink control information, wherein the transmission comprises user equipment identifier.
14. The apparatus of claim 8 , the operations further comprising encoding together payload size, modulation coding scheme, and redundancy version in the control information.
15. The apparatus of claim 8 , wherein the one or more monitoring occasions are configured using radio resource control (RRC) signaling.
16. A computer readable storage medium storing computer executable instructions that when executed by a computing device cause said computing device to effectuate operations comprising:
monitoring in one or more monitoring occasions for control information,
wherein the control information is received using a first beam, wherein first beam is based on a physical downlink control channel (PDCCH) quasi co-located with a synchronization signal block (SSB); and
based on the one or more monitoring occasions, receiving downlink control channel spatial information using the first beam,
wherein the SSB is received using a second beam and the physical downlink control channel (PDCCH) transmission is received using the first beam, wherein the first beam and the second beam are received from a same direction and the SSB and PDCCH transmission are quasi co-located with respect to spatial quasi co-location parameters.
17. The computer readable storage medium of claim 16 , wherein the one or more monitoring occasions are configured using radio resource control (RRC) signaling.
18. The computer readable storage medium of claim 16 , the operations further comprising activating or deactivating grant free resources based on downlink control information.
19. The computer readable storage medium of claim 16 , the operations further comprising obtaining time and frequency resources for grant free transmission based on downlink control information.
20. The computer readable storage medium of claim 16 , the operations further comprising transmitting control signaling for a grant free resource in uplink control information, wherein the transmission comprises user equipment identifier.