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EP-4736559-A1 - TRANSMISSION AND RECEPTION OF PDCCH REPETITIONS

EP4736559A1EP 4736559 A1EP4736559 A1EP 4736559A1EP-4736559-A1

Abstract

Example embodiments of the present disclosure relate to apparatuses, methods, and computer readable storage medium for transmission and reception of physical control channel (PDCCH) repetitions. In a method, a user device determines a repetition pattern associated with repetitions of a PDCCH transmission. The repetition pattern is configured in at least one slot in one or more frames. The user device monitors the repetitions of the PDCCH transmission based on the repetition pattern. Then, the user device decodes control information based on at least one monitored repetition of the repetitions of the PDCCH transmission.

Inventors

  • BI, Bo
  • MARCONE, Alessio
  • AHMADZADEH, Arman
  • FREDERIKSEN, FRANK

Assignees

  • Nokia Technologies Oy

Dates

Publication Date
20260506
Application Date
20230630

Claims (20)

  1. A user device comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the user device at least to: determine a repetition pattern associated with repetitions of a physical downlink control channel, PDCCH, transmission, wherein the repetition pattern is configured in at least one slot in one or more frames; monitor the repetitions of the PDCCH transmission based on the repetition pattern; and decode control information based on at least one monitored repetition of the repetitions of the PDCCH transmission.
  2. The user device of claim 1, wherein the repetition pattern is determined based on at least one of: a repetition factor, a starting symbol number, a starting slot number, a starting frame number, a slot offset value, a frame offset value, or an index of a synchronization signal block, SSB, beam.
  3. The user device of claim 2, wherein the at least one slot has at least one slot number, wherein the at least one slot number comprises at least one of: a first slot number indicating the starting slot number for the repetitions of the PDCCH transmission, or a second slot number with the slot offset value with respect to the first slot number.
  4. The user device of claim 3, wherein the repetition pattern is configured in slots having at least one of the first or second slot number in the one or more frames.
  5. The user device of claim 3, wherein the repetition pattern is configured in a slot having the first or second slot number in each of the one or more frames.
  6. The user device of claim 5, wherein the repetition pattern is configured in at least one symbol of the slot having the first or second slot number.
  7. The user device of any of claims 3-6, wherein the first slot number is predefined.
  8. The user device of claim 2, wherein the one or more frames have one or more frame numbers, wherein the one or more frame numbers comprise at least one of: a first frame number indicating the starting frame number for the repetitions of the PDCCH transmission, or a second frame number with the frame offset value with respect to the first frame number.
  9. The user device of any of claims 2 and 8, wherein the starting frame number of the one or more frames is determined based on a predetermined periodicity and a reference frame.
  10. The user device of claim 9, wherein the reference frame has a system frame number (SFN) 0 or 1.
  11. The user device of claim 9 or 10, wherein the predetermined periodicity is associated with a number of frames for the repetitions of the PDCCH transmission, and the number of frames depends on the repetition factor.
  12. The user device of claim 11, wherein the starting frame number is determined based on: (SFN start –SFN reference ) mod (M×2) = 0, wherein SFN start represents the starting frame number, SFN reference represents a system frame number of the reference frame, and M represents the number of frames.
  13. The user device of any of claims 11-12, wherein the repetition pattern is configured in two slots in each of the one or more frames, and the number of frames is determined as: wherein M represents the number of frames, and N represents the repetition factor.
  14. The user device of any of claims 1-13, wherein the at least one memory and the at least one processor further cause the user device to: receive at least one configuration associated with the repetition pattern.
  15. The user device of any of claims 1-14, wherein the PDCCH comprises Type0-PDCCH.
  16. A network device comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to: determine a repetition pattern associated with repetitions of a physical downlink control channel, PDCCH, transmission, wherein the repetition pattern is configured in at least one slot in one or more frames; and transmit the repetitions of the PDCCH transmission based on the repetition pattern.
  17. The network device of claim 16, wherein the repetition pattern is determined based on at least one of: a repetition factor, a starting symbol number, a starting slot number, a starting frame number, a slot offset value, a frame offset value, or an index of a synchronization signal block, SSB, beam.
  18. The network device of claim 17, wherein the at least one slot has at least one predetermined slot number, wherein the at least one predetermined slot number comprises at least one of: a first slot number indicating a starting slot number for the repetitions of the PDCCH transmission, or a second slot number with the offset value with respect to the first slot number.
  19. The network device of claim 18, wherein the repetition pattern is configured in slots having at least one of the first or second slot number in the one or more frames.
  20. The network device of claim 18, wherein the repetition pattern is configured in a slot having the first or second slot number in each of the one or more frames.

Description

TRANSMISSION AND RECEPTION OF PDCCH REPETITIONS FIELDS Various example embodiments of the present disclosure generally relate to the field of telecommunication and in particular, to apparatuses, methods and computer readable storage medium for transmission and/or reception of physical control channel (PDCCH) repetitions. BACKGROUND In the third-generation partnership project (3GPP) Release 18 (Rel-18) , it is studied for non-terrestrial networks (NTNs) to apply solutions developed by new radio (NR) coverage enhancements to NTNs, and to identify potential issues and enhancements, considering NTN characteristics including large propagation delay and satellite movement. In a preliminary study phase, coverage performance of different uplink (UL) and downlink (DL) channels is assessed, and the bottleneck channels are identified. Such identification leads to the objectives for NTNs to specify physical uplink control channel (PUCCH) enhancements for Message 4 (Msg4) hybrid automatic repeat request (HARQ) -acknowledgement (ACK) (e.g., repetitions) and to study demodulation reference signal (DMRS) bundling for a physical uplink shared channel (PUSCH) taking NTN-specifics (e.g., time-frequency pre-compensation) into account and, if necessary, to specify enhancements to Release 17 (Rel-17) procedures. Some DL channels need enhancements as well. SUMMARY In a first aspect of the present disclosure, there is provided a user device. The user device comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the user device at least to: determine a repetition pattern associated with repetitions of a physical downlink control channel (PDCCH) transmission; monitor the repetitions of the PDCCH transmission based on the repetition pattern; and decode control information based on at least one monitored repetition of the repetitions of the PDCCH transmission. The repetition pattern is configured in at least one slot in one or more frames. In a second aspect of the present disclosure, there is provided a network device. The network device comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to: determine a repetition pattern associated with repetitions of a PDCCH transmission; and transmit the repetitions of the PDCCH transmission based on the repetition pattern. The repetition pattern is configured in at least one slot in one or more frames. In a third aspect of the present disclosure, there is provided a method. The method comprises determining a repetition pattern associated with repetitions of a PDCCH transmission; monitoring the repetitions of the PDCCH transmission based on the repetition pattern; and decoding control information based on at least one monitored repetition of the repetitions of the PDCCH transmission. The repetition pattern is configured in at least one slot in one or more frames. In a fourth aspect of the present disclosure, there is provided a method. The method comprises determining a repetition pattern associated with repetitions of a PDCCH transmission; and transmitting the repetitions of the PDCCH transmission based on the repetition pattern. The repetition pattern is configured in at least one slot in one or more frames. In a fifth aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises means for determining a repetition pattern associated with repetitions of a PDCCH transmission, the repetition pattern being configured in at least one slot in one or more frames; means for monitoring the repetitions of the PDCCH transmission based on the repetition pattern; and means for decoding control information based on at least one monitored repetition of the repetitions of the PDCCH transmission. In a sixth aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises means for determining a repetition pattern associated with repetitions of a PDCCH transmission, the repetition pattern being configured in at least one slot in one or more frames; and means for transmitting the repetitions of the PDCCH transmission based on the repetition pattern. In a seventh aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium comprises instructions stored thereon for causing an apparatus to perform at least the method according to the third or fourth  aspect. It is to be understood that the Summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description. BRIEF DESCRIPTION OF THE DRAWINGS Some example embodiments will now be described with reference to the accompanying