Configuration of ultra reliable low latency communication
Methods, apparatuses, and computer-readable media are described for configuring Ultra Reliable Low Latency Communication (URLLC) simultaneous transmissions, which can be used to enhance network performance and/or to enhance procedures within the UE to achieve more efficient operations. For example, techniques are described for determining which modulation coding scheme (MCS) table to apply based on various factors. Different techniques are also described for configuring user equipment (UE) with an RNTI based on different considerations.
1. A method comprising:
receiving, at user equipment (UE), a downlink radio resource control (RRC) message including a first PhysicalCellGroupConfig information element (IE) and a second PhysicalCellGroupConfig IE, wherein:
the downlink RRC message is used to configure RRC for the UE;
the first PhysicalCellGroupConfig IE is used to configure a master cell group (MCG) and a radio network temporary identifier (RNTI), wherein configuration parameters for the MCG are provided in the first PhysicalCellGroupConfig IE; and
the second PhysicalCellGroupConfig IE is used to configure a secondary cell group (SCG), wherein configuration parameters for the SCG are provided in the second PhysicalCellGroupConfig IE;
determining the RNTI associated with the UE based on the first PhysicalCellGroupConfig IE in the downlink RRC message;
using the first PhysicalCellGroupConfig IE to configure the MCG, wherein the RNTI is configured for cells within the MCG;
using the second PhysicalCellGroupConfig IE to configure the SCG, wherein the RNTI is not configured for cells within the SCG;
receiving a first uplink grant for the cells within the MCG;
receiving a second uplink grant for the cells within the SCG; and
applying an RNTI-based modulation coding scheme (MCS) determination rule to the first uplink grant in response to the RNTI being configured via the first PhysicalCellGroupConfig IE without applying the RNTI-based MCS determination rule to the second uplink grant, wherein applying the RNTI-based MCS determination rule includes:
obtaining information from a physical downlink control channel (PDCCH), wherein the information includes downlink control information (DCI), and wherein the DCI includes a set of cyclic redundancy check (CRC) bits;
applying a first modulation coding scheme (MCS) table as a result of determining one or more CRC bits of the set of CRC bits in the information are scrambled with the RNTI; and
applying a second MCS table as a result of determining one or more CRC bits of the set of CRC bits in the information are not scrambled with the RNTI, wherein the first MCS table is associated with a higher channel code rate than a second MCS table.
2. The method of claim 1 , wherein the RNTI is a Modulation Coding Scheme Cell-RNTI (MCS-C-RNTI).
3. The method of claim 1 , further comprising applying the first MCS table to the second uplink grant, wherein the first MCS table is applied as a result of:
determining that an uplink data channel associated with the second uplink grant is indicated by a gNB to apply the first MCS table; and
the second uplink grant being scheduled by a DCI having a format 0_0, or 0_1.
4. The method of claim 1 , further comprising applying the first MCS table to the second uplink grant, wherein the first MCS table is applied as a result of the second uplink grant being scheduled by a DCI decoded on a UE-specific search space (USS).
5. The method of claim 1 , further comprising:
receiving a first downlink data scheduling for the cells within the MCG;
receiving a second downlink data scheduling for the cells within the SCG;
applying the RNTI-based MCS determination rule to the first downlink data scheduling in response to the RNTI being configured via the first PhysicalCellGroupConfig IE without applying the RNTI-based MCS determination rule to the second downlink data scheduling.
6. The method of claim 5 , further comprising applying the first MCS table to the second downlink data scheduling, wherein the first MCS table is applied as a result of:
determining that a downlink data channel associated with the second downlink data scheduling is indicated by a gNB to apply the first MCS table;
the second downlink data scheduling being scheduled by a DCI having a format 1_0 or 1_1.
7. The method of claim 5 , further comprising applying the first MCS table to the second downlink data scheduling, wherein the first MCS table is applied as a result of the second downlink data scheduling being scheduled by a DCI decoded on a USS.
8. An apparatus comprising:
a memory; and
a processor coupled to the memory and configured to:
receive a downlink radio resource control (RRC) message including a first PhysicalCellGroupConfig information element (IE) and a second PhysicalCellGroupConfig IE, wherein:
the downlink RRC message is used to configure RRC for the apparatus;
the first PhysicalCellGroupConfig IE is used to configure a master cell group (MCG) and a radio network temporary identifier (RNTI), wherein configuration parameters for the MCG are provided in the first PhysicalCellGroupConfig IE; and
the second PhysicalCellGroupConfig IE is used to configure a secondary cell group (SCG), wherein configuration parameters for the SCG are provided in the second PhysicalCellGroupConfig IE;
determine the RNTI associated with the apparatus based on the first PhysicalCellGroupConfig IE in the downlink RRC message;
use the first PhysicalCellGroupConfig IE to configure the MCG, wherein the RNTI is configured for cells within the MCG; and
use the second PhysicalCellGroupConfig IE to configure the SCG, wherein the RNTI is not configured for cells within the SCG;
receive a first uplink grant for the cells within the MCG;
receive a second uplink grant for the cells within the SCG; and
apply an RNTI-based modulation coding scheme (MCS) determination rule to the first uplink grant in response to the RNTI being configured via the first PhysicalCellGroupConfig IE without applying the RNTI-based MCS determination rule to the second uplink grant, wherein applying the RNTI-based MCS determination rule includes:
obtaining information from a physical downlink control channel (PDCCH), wherein the information includes downlink control information (DCI), and wherein the DCI includes a set of cyclic redundancy check (CRC) bits;
applying a first modulation coding scheme (MCS) table as a result of determining one or more CRC bits of the set of CRC bits in the information are scrambled with the RNTI; and
applying a second MCS table as a result of determining one or more CRC bits of the set of CRC bits in the information are not scrambled with the RNTI, wherein the first MCS table is associated with a higher channel code rate than a second MCS table.
9. The apparatus of claim 8 , wherein the RNTI is a Modulation Coding Scheme Cell-RNTI (MCS-C-RNTI).
10. The apparatus of claim 8 , wherein the apparatus is a mobile device.
11. The apparatus of claim 8 , wherein the processor is further configured to apply the first MCS table to the second uplink grant, wherein the first MCS table is applied as a result of:
determining that an uplink data channel associated with the second uplink grant is indicated by a gNB to apply the first MCS table; and
the second uplink grant being scheduled by a DCI having a format 0_0 or 0_1.
12. The apparatus of claim 8 , wherein the processor is further configured to apply the first MCS table to the second uplink grant, wherein the first MCS table is applied as a result of the second uplink grant being scheduled by a DCI decoded on a UE-specific search space (USS).
13. The apparatus of claim 8 , wherein the processor is further configured to:
receive a first downlink data scheduling for the cells within the MCG;
receive a second downlink data scheduling for the cells within the SCG;
apply the RNTI-based MCS determination rule to the first downlink data scheduling in response to the RNTI being configured via the first PhysicalCellGroupConfig IE without applying the RNTI-based MCS determination rule to the second downlink data scheduling.
14. The apparatus of claim 13 , wherein the processor is further configured to apply the first MCS table to the second downlink data scheduling, wherein the first MCS table is applied as a result of:
determining that a downlink data channel associated with the second downlink data scheduling is indicated by a gNB to apply the first MCS table;
the second downlink data scheduling being scheduled by a DCI having a format 1_0 or 1_1.
15. The apparatus of claim 13 , wherein the processor is further configured to apply the first MCS table to the second downlink data scheduling, wherein the first MCS table is applied as a result of the second downlink data scheduling being scheduled by a DCI decoded on a USS.
16. A non-transitory computer-readable medium of a user equipment (UE) having stored thereon instructions that, when executed by one or more processors, cause the one or more processors to:
receive a downlink radio resource control (RRC) message including a first PhysicalCellGroupConfig information element (IE) and a second PhysicalCellGroupConfig IE, wherein:
the downlink RRC message is used to configure RRC for the apparatus;
the first PhysicalCellGroupConfig IE is used to configure a master cell group (MCG) and a radio network temporary identifier (RNTI), wherein configuration parameters for the MCG are provided in the first PhysicalCellGroupConfig IE; and
the second PhysicalCellGroupConfig IE is used to configure a secondary cell group (SCG), wherein configuration parameters for the SCG are provided in the second PhysicalCellGroupConfig IE;
determine the RNTI associated with the apparatus based on the first PhysicalCellGroupConfig IE in the downlink RRC message;
use the first PhysicalCellGroupConfig IE to configure the MCG, wherein the RNTI is configured for cells within the MCG; and
use the second PhysicalCellGroupConfig IE to configure the SCG, wherein the RNTI is not configured for cells within the SCG;
receive a first uplink grant for cells within the MCG;
receive a second uplink grant for the cells within the SCG; and
apply an RNTI-based modulation coding scheme (MCS) determination rule to the first uplink grant in response to the RNTI being configured via the first PhysicalCellGroupConfig IE without applying the RNTI-based MCS determination rule to the second uplink grant, wherein applying the RNTI-based MCS determination rule includes:
obtaining information from a physical downlink control channel (PDCCH), wherein the information includes downlink control information (DCI), and wherein the DCI includes a set of cyclic redundancy check (CRC) bits;
applying a first modulation coding scheme (MCS) table as a result of determining one or more CRC bits of the set of CRC bits in the information are scrambled with the RNTI; and
applying a second MCS table as a result of determining one or more CRC bits of the set of CRC bits in the information are not scrambled with the RNTI, wherein the first MCS table is associated with a higher channel code rate than a second MCS table.
17. The non-transitory computer-readable medium of claim 16 , wherein the RNTI is a Modulation Coding Scheme Cell-RNTI (MCS-C-RNTI).
18. The non-transitory computer-readable medium of claim 16 , further comprising instructions that, when executed by the one or more processors, cause the one or more processors to apply the first MCS table to the second uplink grant, wherein the first MCS table is applied as a result of:
determining that an uplink data channel associated with the second uplink grant is indicated by a gNB to apply the first MCS table; and
the second uplink grant being scheduled by a DCI having a format 0_0 or 0_1.
19. The non-transitory computer-readable medium of claim 16 , further comprising instructions that, when executed by the one or more processors, cause the one or more processors to apply the first MCS table to the second uplink grant, wherein the first MCS table is applied as a result of the second uplink grant being scheduled by a DCI decoded on a UE-specific search space (USS).
20. The non-transitory computer-readable medium of claim 16 , further comprising instructions that, when executed by the one or more processors, cause the one or more processors to:
receive a first downlink data scheduling for the cells within the MCG;
receive a second downlink data scheduling for the cells within the SCG;
apply the RNTI-based MCS determination rule to the first downlink data scheduling in response to the RNTI being configured via the first PhysicalCellGroupConfig IE without applying the RNTI-based MCS determination rule to the second downlink data scheduling.
21. The non-transitory computer-readable medium of claim 20 , further comprising instructions that, when executed by the one or more processors, cause the one or more processors to apply the first MCS table to the second downlink data scheduling, wherein the first MCS table is applied as a result of:
determining that a downlink data channel associated with the second downlink data scheduling is indicated by a gNB to apply the first MCS table;
the second downlink data scheduling being scheduled by a DCI having a format 1_0 or 1_1.
22. The non-transitory computer-readable medium of claim 20 , further comprising instructions that, when executed by the one or more processors, cause the one or more processors to apply the first MCS table to the second downlink data scheduling, wherein the first MCS table is applied as a result of the second downlink data scheduling being scheduled by a DCI decoded on a USS.