Reliability mechanisms for physical downlink control channel (pdcch) transmissions in new radio (nr) systems

Patent metadata

Field	Value
Publication number	US-2019182807-A1
Application number	US-201916277680-A
Country	US
Kind code	A1
Filing date	Feb 15, 2019
Priority date	Feb 16, 2018
Publication date	Jun 13, 2019
Grant date	—

Abstract

Embodiments of the present disclosure describe methods, apparatuses, storage media, and systems for determining to transfer multiple copies of a downlink control information through physical downlink control channel (PDCCH) to a user equipment (UE), and further determining a first downlink control information (DCI) format for scheduling of downlink (DL) assignments for Physical Downlink Shared Channel (PDSCH) reception in a DL bandwidth part (BWP), or for determining a second DCI format for scheduling uplink (UL) grants for physical uplink shared channel (PUSCH) transmission in a UL bandwidth part (BWP). Other embodiments may be described and claimed.

First claim

What is claimed is:

1 . One or more non-transitory, computer-readable media having instructions that, when executed, cause a user equipment (UE) in a new radio (NR) system to:
determine a configuration of the UE for monitoring physical downlink control channel (PDCCH) candidates to obtain a first downlink control information (DCI) format, wherein the first DCI format is for scheduling of downlink (DL) assignments for Physical Downlink Shared Channel (PDSCH) reception in a DL bandwidth part (BWP), a parameter of the first DCI format is to indicate a frequency domain resource assignment for the scheduled DL assignments for PDSCH with a granularity of contiguous-in-frequency physical resource blocks (PRBs) that is configured to be greater than one by a protocol layer higher than a physical layer; and determine a schedule of DL assignments for PDSCH reception based on the first DCI format.

2 . The one or more non-transitory, computer-readable media of claim 1 , wherein the configuration of the UE is for monitoring PDCCH candidates to obtain a second DCI format for scheduling uplink (UL) grants for physical uplink shared channel (PUSCH) transmission in a UL bandwidth part (BWP), and wherein a parameter of the second DCI format is to indicate a frequency domain resource assignment for the scheduled UL grants for PUSCH with a granularity of contiguous-in-frequency physical resource blocks (PRBs) that is configured to be greater than one by a protocol layer higher than the physical layer.

3 . The one or more non-transitory, computer-readable media of claim 2 , wherein the second DCI format for scheduling UL grants has a same size as the first DCI format.

4 . The one or more non-transitory, computer-readable media of claim 2 , wherein the first DCI format is of a size smaller than or equal to a size of DCI format 1_0; and the second DCI format is of a size smaller than or equal to a size of DCI format 0_0.

5 . The one or more non-transitory, computer-readable media of claim 2 , wherein the first DCI format indicates a DL component carrier (CC) for PDSCH reception from a set with up to two candidate CCs for DL; and
the second DCI format indicates a UL CC for PUSCH transmission from a set with up to two candidate CCs for UL.

6 . The one or more non-transitory, computer-readable media of claim 2 , wherein the first DCI format is different from DCI formats 1_0 or 1_1; and
the second DCI format is different from DCI formats 0_0 or 0_1.

7 . The one or more non-transitory, computer-readable media of claim 2 , wherein the first or the second DCI format(s) is same as DCI formats 1_1 or DCI format 0_1 respectively with interpretation of one or more of information bit-fields that are different from that of Rel-15 NR specifications based on configuration conveyed by a protocol layer higher than the physical layer.

8 . The one or more non-transitory, computer-readable media of claim 2 , wherein the first or the second DCI format(s) indicates a time-domain resource assignment (TDRA) for the scheduled DL assignments for PDSCH or the scheduled UL grants for PUSCH respectively using a bit-width of one to two bits.

9 . The one or more non-transitory, computer-readable media of claim 2 , wherein the first or the second DCI format(s) has a bit-width of zero or one bit for a redundancy version bit-field.

10 . The one or more non-transitory, computer-readable media of claim 2 , wherein the first or the second DCI format(s) indicates a Hybrid Automatic Repeat reQuest (HARQ) process index for the scheduled DL assignments for PDSCH or the scheduled UL grants for PUSCH respectively using a one-, two-, or three-bit field indicating one of two, four, or eight HARQ processes.

11 . The one or more non-transitory, computer-readable media of claim 1 , wherein the instructions, when executed, further cause the UE to:
determine a configuration of the UE for monitoring PDCCH for downlink control information, wherein multiple copies of the downlink control information are transmitted from a base station of the NR system through PDCCH to the UE; monitor the PDCCH to obtain the downlink control information; and perform operations according to the downlink control information.

12 . The one or more non-transitory, computer-readable media of claim 11 , wherein the multiple copies of the downlink control information are transmitted by multiple PDCCH candidates.

13 . The one or more non-transitory, computer-readable media of claim 12 , wherein the instructions, when executed, further cause the UE to:
combine the multiple PDCCH candidates received by the UE to improve reception reliability or coverage.

14 . The one or more non-transitory, computer-readable media of claim 11 , wherein the configuration of the UE for monitoring PDCCH is configured with a set of one or more PDCCH repetition levels using radio resource control (RRC) signaling.

15 . The one or more non-transitory, computer-readable media of claim 11 , wherein the multiple copies of the downlink control information are transmitted over multiple control resource sets (CORESET).

16 . The one or more non-transitory, computer-readable media of claim 15 , wherein the multiple CORESETs have different configurations of frequency or time domain resources, or different interleaving parameters for control-channel element (CCE) to resource-element group (REG) mapping.

17 . The one or more non-transitory, computer-readable media of claim 12 , wherein a time reference for a start of a PDSCH or PUSCH transmission corresponds to a last symbol of a last PDCCH candidate of the multiple PDCCH candidates.

18 . An apparatus for wireless communication, comprising:
memory circuitry to store multiple copies of downlink control information for a user equipment (UE) in a new radio (NR) system; processing circuitry coupled with the memory circuitry, the processing circuitry to:
determine a configuration of the UE for monitoring physical downlink control channel (PDCCH) for the multiple copies of downlink control information transmitted from a base station of the NR system through PDCCH to the UE;
monitor the PDCCH to obtain the downlink control information; and
perform operations according to the downlink control information.

19 . The apparatus of claim 18 , wherein the multiple copies of the downlink control information are transmitted by multiple PDCCH candidates, and the processing circuitry is to combine the multiple PDCCH candidates received by the UE to improve reception reliability or coverage.

20 . The apparatus of claim 18 , wherein the configuration of the UE for monitoring PDCCH is configured with a set of one or more PDCCH repetition levels using radio resource control (RRC) signaling.

21 . The apparatus of claim 18 , wherein the multiple copies of the downlink control information are transmitted over multiple control resource sets (CORESET).

22 . One or more non-transitory, computer-readable media having instructions that, when executed, cause a base station in a new radio (NR) system to:
determine to transfer multiple copies of a downlink control information through physical downlink control channel (PDCCH) to a user equipment (UE); determine a first downlink control information (DCI) format, wherein the first DCI format is for scheduling of downlink (DL) assignments for Physical Downlink Shared Channel (PDSCH) reception in a DL bandwidth part (BWP), a parameter of the first DCI format is to indicate a frequency domain resource

Assignees

• Intel Corp

Inventors

• Panteleev Sergey
• Chatterjee Debdeep
• Xiong Gang
• Hamidi-Sepehr Fatemeh
• He Hong

Classifications

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L1/1893

  Physical mapping arrangements (physical resource mapping in general H04L5/00) · CPC title

• H04L1/1819

  with retransmission of additional or different redundancy · CPC title

• H04L1/189

  Transmission or retransmission of more than one copy of a message · CPC title

• H04L1/1887

  Scheduling and prioritising arrangements · CPC title