Preemption indications for new radio
Embodiments of dynamic multiplexing are described, including the transmission of preemption indication (PI) to indicate preemption of time-frequency resources. In some embodiments, a next Generation NodeB (gNB) is configured to transmit PIs in signaling to preempt an enhanced Mobile Broadband (eMBB) communications transmission with an ultra-reliable and low latency communications (URLCC) transmission. In some embodiments, a user equipment (UE) is configured to monitor a region of time-frequency resources, within a bandwidth part (BWP), for a PI. The PI indicates to the UE a portion of time-frequency resources that omit transmissions intended for the UE. In some embodiments, the gNB transmits the PI to the UE within preemption indication downlink control information (PI-DCI) in a physical downlink control channel (PDCCH) in a control resource set (CORESET). In some embodiments, the BWP is defined according to a frequency domain location, a bandwidth, and a subcarrier spacing for a given numerology.
1. An apparatus of a New Radio (NR) NodeB (gNB), the apparatus comprising:
one or more processors configured to:
encode radio resource control (RRC) signaling to configure a user equipment (UE) for monitoring a region of time-frequency resources within a bandwidth part (BWP) for a preemption indication (PI) via a group-common downlink control information (DCI), wherein the PI via group-common DCI (PI-DCI) is transmitted in a control resource set (COREST);
encode, for transmission to a group of UEs including the UE, the PI-DCI to indicate frequency domain resources that omit transmissions intended for the UE, wherein the transmission of one or more synchronization signal (SS) blocks in the frequency domain resources are not preempted; and
configure transceiver circuitry to transmit the PI-DCI in a physical downlink control channel (PDCCH) in the CORESET to the group of UEs.
2. The apparatus of claim 1 , wherein the PI provides an indication of a slot, back in time relative to the slot carrying the PI, in which preemption occurs.
3. The apparatus of claim 1 , wherein, when the CORESET in which the DCI-PI is transmitted and the resources to which the PI apply are in different BWPs, the resources to which PI applies are determined according to a numerology of the BWP in which the DCI-PI is transmitted.
4. The apparatus of claim 1 , wherein, when the CORESET in which the DCI-PI is transmitted and the resources to which the PI apply are in different BWPs, the resources to which PI applies are determined according to a numerology of the BWP including the resources to which the PI applies.
5. The apparatus of claim 1 , wherein the RRC signaling includes a preemption indication radio network temporary identifier (PI-RNTI) used for indicating preemption in a downlink (DL), and wherein the one or more processors are configured to encode the PI-DCI with a cyclic redundancy check (CRC) scrambled by the PI-RNTI.
6. The apparatus of claim 1 , wherein the region of time-frequency resources is defined by a starting position and a number of resource blocks within the BWP.
7. The apparatus of claim 1 , wherein the PI-DCI includes a bit value of 0 to indicate a transmission in a corresponding symbol group, and wherein the PI-DCI includes a bit value of 1 to indicate no transmission in the corresponding symbol group.
8. The apparatus of claim 1 , wherein the RRC signaling includes an indication corresponding to a granularity parameter of the region of time-frequency resources.
9. A computer-readable hardware storage device that stores instructions for execution by one or more processors of a New Radio (NR) NodeB (gNB), the instructions to configure the one or more processors to:
encode radio resource control (RRC) signaling to configure a user equipment (UE) for monitoring a region of time-frequency resources within a bandwidth part (BWP) for a preemption indication (PI) via a group-common downlink control information (DCI), wherein the PI via group-common DCI (PI-DCI) is transmitted in a control resource set (COREST);
encode, for transmission to a group of UEs including the UE, the PI-DCI to indicate frequency domain resources that omit transmissions intended for the UE, wherein the transmission of one or more synchronization signal (SS) blocks in the frequency domain resources are not preempted; and
configure transceiver circuitry to transmit the PI-DCI in a physical downlink control channel (PDCCH) in the CORESET to the group of UEs.
10. The computer-readable hardware storage device of claim 9 , wherein the PI provides an indication of a slot, back in time relative to the slot carrying the PI, in which preemption occurs.
11. The computer-readable hardware storage device of claim 9 , wherein, when the CORESET in which the DCI-PI is transmitted and the resources to which the PI apply are in different BWPs, the resources to which PI applies are determined according to a numerology of the BWP in which the DCI-PI is transmitted.
12. The computer-readable hardware storage device of claim 9 , wherein, when the CORESET in which the DCI-PI is transmitted and the resources to which the PI apply are in different BWPs, the resources to which PI applies are determined according to a numerology of the BWP including the resources to which the PI applies.
13. An apparatus of a user equipment (UE) comprising:
processing circuitry configured to:
decode radio resource control (RRC) signaling, received from a New Radio (NR) NodeB (gNB), the RRC signaling to configure the UE for monitoring a region of time-frequency resources within a bandwidth part (BWP) for a preemption indication (PI) via a group-common downlink control information (DC), wherein the PI via group-common DCI (PI-DCI) is transmitted in a control resource set (CORESET);
configure transceiver circuitry to receive signaling in a physical downlink control channel (PDCCH) in the CORESET; and
decode the PI-DCI from the received signaling, the PI-DCI to indicate frequency domain resources that omit transmissions intended for the UE, wherein transmission of one or more synchronization signal (SS) blocks in the frequency domain resources is not preempted.
14. The apparatus of claim 13 , wherein the PI provides an indication of a slot, back in time relative to the slot carrying the PI, in which preemption occurs.
15. The apparatus of claim 13 , wherein, when the CORESET in which the DCI-PI is received and the resources to which the PI apply are in different BWPs, the resources to which PI applies are determined according to a numerology of the BWP in which the DCI-PI is received.
16. The apparatus of claim 13 , wherein, when the CORESET in which the DCI-PI is received and the resources to which the PI apply are in different BWPs, the resources to which PI applies are determined according to a numerology of the BWP including the resources to which the PI applies.
17. The apparatus of claim 13 , wherein the processing circuitry is configured to:
decode, from the RRC signaling, a preemption indication radio network temporary identifier (PI-RNTI) indicating preemption in a downlink (DL); and
identify a cyclic redundancy check (CRC) scrambled by the PI-RNTI and decode the PI-DCI based on the PI-RNTI.
18. The apparatus of claim 13 , wherein the region of time-frequency resources is defined by a starting position and a number of resource blocks within the BWP.
19. The apparatus of claim 13 , wherein the processing circuitry is configured to decode, from the RRC signaling, an indication corresponding to a granularity parameter of the region of time-frequency resources.
20. The apparatus of claim 13 , wherein the processing circuitry is configured to:
determine that a symbol group includes a transmission intended for the UE when the PI-DCI includes a bit value of 0; and
determine that a symbol group omits transmissions intended for the UE when the PI-DCI includes a bit value of 1.