Scheduling in communication systems with multiple service types
A method for a user equipment (UE) to receive physical downlink control channels (PDCCHs) with a first sub-carrier spacing (SCS) includes receiving a bitmap indicating symbols of a slot that are first symbols of control resource sets (CORESETs) for PDCCH receptions, determining, based on the bitmap, a first number of symbols that is a smallest number of symbols in between a first symbol of PDCCH receptions in first CORESETs and a first symbol of PDCCH receptions in second CORESETs, determining, based on the first number of symbols and the SCS, a first maximum number of non-overlapping control channel elements (CCEs), and receiving the PDCCHs with the first SCS according to the first maximum number of non-overlapping CCEs.
1. A method for a base station to determine sizes of downlink control information (DCI) formats, the method comprising:
determining:
a first total number of DCI format sizes is larger than a predetermined number, and
a smaller first DCI format and a larger second DCI format between a DCI format 0_2 and a DCI format 1_2;
padding first one or more bits to a number of information bits of the first DCI format until a size of the first DCI format is same as a size of the second DCI format;
determining:
a second total number of DCI format sizes is larger than the predetermined number, after padding the first one or more bits, and
a smaller third DCI format and a larger fourth DCI format between a DCI format 0_1 and a DCI format 1_1;
padding second one or more bits to a number of information bits of the third DCI format until a size of the third DCI format is same as a size of the fourth DCI format, wherein:
the DCI format 0_1 or the DCI format 0_2 schedules a physical uplink shared channel (PUSCH) reception, and
the DCI format 1_1 or the DCI format 1_2 schedules a physical downlink shared channel (PDSCH) transmission; and
transmitting, to a user equipment (UE), a physical downlink control channel (PDCCH) that provides one of the DCI format 0_2, the DCI format 1_2, the DCI format 0_1, or the DCI format 1_1.
2. The method of claim 1 , wherein the predetermined number corresponds to a number of sizes for DCI formats with a cyclic redundancy check (CRC) scrambled by a cell radio network temporary identifier (C-RNTI) for the UE.
3. The method of claim 1 , wherein the size of the DCI format 0_2 is smaller than the size of the DCI format 0_1.
4. The method of claim 1 , wherein the size of the DCI format 1_2 is smaller than the size of the DCI format 1_1.
5. The method of claim 1 , wherein the predetermined number is 3.
6. The method of claim 1 , further comprising:
transmitting:
information for a first search space set for PDCCH transmissions that provide the DCI format 0_1 or the DCI format 1_1, and
information for a second search space set for PDCCH transmissions that provide the DCI format 0_2 or the DCI format 1_2, wherein the first search space set is different from the second search space set.
7. The method of claim 1 , further comprising:
transmitting:
information for first and second groups of search space sets, and
PDCCHs according to the first group of search space sets;
receiving a scheduling request; and
transmitting PDCCHs according to the second group of search space sets based on the reception of the scheduling request.
8. A base station comprising:
a processor configured to:
determine:
a first total number of DCI format sizes is larger than a predetermined number, and
a smaller first DCI format and a larger second DCI format between a DCI format 0_2 and a DCI format 1_2;
pad first one or more bits to a number of information bits of the first DCI format until a size of the first DCI format is same as a size of the second DCI format;
determine:
a second total number of DCI format sizes is larger than the predetermined number, after padding the first one or more bits, and
a smaller third DCI format and a larger fourth DCI format between a DCI format 0_1 and a DCI format 1_1; and
pad second one or more bits to a number of information bits of the third DCI format until a size of the third DCI format is same as a size of the fourth DCI format, wherein:
the DCI format 0_1 or the DCI format 0_2 schedules a physical uplink shared channel (PUSCH) reception, and
the DCI format 1_1 or the DCI format 1_2 schedules a physical downlink shared channel (PDSCH) transmission; and
a transceiver operably coupled to the processor, the transceiver configured to transmit, to a user equipment (UE), a physical downlink control channel (PDCCH) that provides one of the DCI format 0_2, the DCI format 1_2, the DCI format 0_1, or the DCI format 1_1.
9. The base station of claim 8 , wherein the predetermined number corresponds to a number of sizes for DCI formats with a cyclic redundancy check (CRC) scrambled by a cell radio network temporary identifier (C-RNTI) for the UE.
10. The base station of claim 8 , wherein the size of the DCI format 0_2 is smaller than the size of the DCI format 0_1.
11. The base station of claim 8 , wherein the size of the DCI format 1_2 is smaller than the size of the DCI format 1_1.
12. The base station of claim 8 , wherein the predetermined number is 3.
13. The base station of claim 8 , wherein the transceiver is further configured to transmit:
information for a first search space set for PDCCH transmissions that provide the DCI format 0_1 or the DCI format 1_1, and
information for a second search space set for PDCCH transmissions that provide the DCI format 0_2 or the DCI format 1_2, wherein the first search space set is different from the second search space set.
14. The base station of claim 8 , wherein the transceiver is further configured to:
transmit:
information for first and second groups of search space sets, and
PDCCHs according to the first group of search space sets;
receive a scheduling request; and
transmit PDCCHs according to the second group of search space sets based on the reception of the scheduling request.
15. A user equipment (UE) comprising:
a processor configured to:
determine:
a first total number of DCI format sizes is larger than a predetermined number, and
a smaller first DCI format and a larger second DCI format between a DCI format 0_2 and a DCI format 1_2;
pad first one or more bits to a number of information bits of the first DCI format until a size of the first DCI format is same as a size of the second DCI format;
determine:
a second total number of DCI format sizes is larger than the predetermined number, after padding the first one or more bits, and
a smaller third DCI format and a larger fourth DCI format between a DCI format 0_1 and a DCI format 1_1; and
pad second one or more bits to a number of information bits of the third DCI format until a size of the third DCI format is same as a size of the fourth DCI format, wherein:
the DCI format 0_1 or the DCI format 0_2 schedules a physical uplink shared channel (PUSCH) transmission, and
the DCI format 1_1 or the DCI format 1_2 schedules a physical downlink shared channel (PDSCH) reception; and
a transceiver operably coupled to the processor, the transceiver configured to receive a physical downlink control channel (PDCCH) that provides one of the DCI format 0_2, the DCI format 1_2, the DCI format 0_1, or the DCI format 1_1.
16. The UE of claim 15 , wherein the predetermined number corresponds to a number of sizes for DCI formats with a cyclic redundancy check (CRC) scrambled by a cell radio network temporary identifier (C-RNTI).
17. The UE of claim 15 , wherein the size of the DCI format 0_2 is smaller than the size of the DCI format 0_1.
18. The UE of claim 15 , wherein the size of the DCI format 1_2 is smaller than the size of the DCI format 1_1.
19. The UE of claim 15 , wherein the predetermined number is 3.
20. The UE of claim 15 , wherein the transceiver is further configured to receive:
information for a first search space set for PDCCH receptions that provide the DCI format 0_1 or the DCI format 1_1, and
information for a second search space set for PDCCH receptions that provide the DCI format 0_2 or the DCI format 1_2, wherein the first search space set is different from the second search space set.