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EP-4381663-B1 - CORESET SELECTION WITH DIFFERENT QCL-TYPED FOR M-TRP PDCCH REPETITION

EP4381663B1EP 4381663 B1EP4381663 B1EP 4381663B1EP-4381663-B1

Inventors

  • AHMADIAN TEHRANI, Amir Mehdi
  • LADDU, Keeth Saliya Jayasinghe
  • DEGHEL, Matha
  • YUK, YOUNGSOO

Dates

Publication Date
20260506
Application Date
20220712

Claims (13)

  1. An apparatus (110) comprising: means for determining to monitor physical downlink control channel candidates of two or more control resource sets of a communication network, wherein the two or more control resource sets are using different quasi co-location types associated with one or more spatial receiver parameters, QCL-TypeD; and means for determining whether there are at least two linked control resource sets from the two or more control resource sets; in response to the determination that there are no at least two linked control resource sets, means for determining that the physical downlink control channel candidates of the two or more control resource sets are not monitored; in response to the determination that there are at least two linked control resource sets, means for selecting a first control resource set and a second control resource set of the at least two linked control resource sets in a cell for monitoring, wherein based on more than one cell being configured with physical downlink control channel repetition, the selecting comprises selecting linked control resource sets in a cell with one of lowest or highest index, and wherein based on the determination of more than two linked control resource sets, the selecting comprises selecting linked control resource sets with lowest or highest indexes.
  2. The apparatus (110) of claim 1, wherein the selecting comprises selecting two control resource sets with different QCL-TypeD associated with physical downlink control channel repetitions.
  3. The apparatus (110) of claim 2, wherein the two or more control resource sets comprise at least the first control resource set with a first QCL-TypeD and at least one other control resource set, and wherein the monitoring comprises monitoring physical downlink control channel candidates of the at least one other control resource set associated with a second QCL-TypeD.
  4. The apparatus (110) of claim 3, wherein the monitoring is extended to monitor any control resource set of the at least one other control resource set having the same QCL-TypeD as the second QCL-TypeD.
  5. The apparatus (110) of claim 1, wherein the monitoring is not performed on control resource sets of the two or more control resource sets which are not linked with a first control resource set.
  6. The apparatus (110) of claim 1, wherein a priority is given for monitoring control resource sets allowing physical downlink control channel repetition that is not based on at least one of common search space or user equipment specific search space indexes.
  7. The apparatus (110) of claim 1, wherein the selecting comprises selecting the first control resource set with a first QCL-TypeD and selecting at least one other control resource set with a different QCL-TypeD based on control resource sets not associated with the first QCL-TypeD.
  8. The apparatus (110) of claim 1, wherein the selecting comprises using restrictions to support at least one of physical downlink control channel repetition or multi-transmission and reception point operations.
  9. The apparatus (110) of claim 1, wherein the apparatus comprises a user equipment or is comprised in a user equipment.
  10. A method, performed by an apparatus, comprising: determining to monitor physical downlink control channel candidates of two or more control resource sets of a communication network, wherein the two or more control resource sets are using different quasi co-location types associated with one or more spatial receiver parameters, QCL-TypeD; and determining whether there are at least two linked control resource sets from the two or more control resource sets; in response to the determination that there are no at least two linked control resource sets, means for determining that the physical downlink control channel candidates of the two or more control resource sets are not monitored; in response to the determination that there are at least two linked control resource sets, means for selecting a first control resource set and a second control resource set of the at least two linked control resource sets in a cell for monitoring, wherein based on more than one cell being configured with physical downlink control channel repetition, the selecting comprises selecting linked control resource sets in a cell with one of lowest or highest index, and wherein based on the determination of more than two linked control resource sets, the selecting comprises selecting linked control resource sets with lowest or highest indexes.
  11. The method of claim 10, wherein the selecting comprises selecting two control resource sets with different QCL-TypeD associated with physical downlink control channel repetitions.
  12. The method of claim 10 or 11, wherein the two or more control resource sets comprise at least the first control resource set with a first QCL-TypeD and at least one other control resource set, and wherein the monitoring comprises monitoring physical downlink control channel candidates of the at least one other control resource set associated with a second QCL-TypeD, and the monitoring is extended to monitor any control resource set of the at least one other control resource set having the same QCL-TypeD as the second QCL-TypeD.
  13. The method of claim 12, wherein a priority is given for monitoring control resource sets allowing physical downlink control channel repetition that is not based on at least one of common search space or user equipment specific search space indexes.

Description

TECHNICAL FIELD: The teachings in accordance with the exemplary embodiments of this invention relate generally to determining CORESETs to monitor for physical resources and, more specifically, relate to determining CORESETs with different QCL-TypeDs using PDCCH repetitions for monitoring physical resources. BACKGROUND: This section is intended to provide a background or context to the invention that is recited in the claims. The description herein may include concepts that could be pursued, but are not necessarily ones that have been previously conceived or pursued. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims in this application and is not admitted to be prior art by inclusion in this section. APPLE INC: "On Multi-TRP Reliability Enhancement", R1-2105088, provides some discussion on PDCCH/PUSCH/PUCCH reliability enhancement. SPREADTRUM COMMUNICATIONS: "Discussion on enhancements on beam management for multi-TRP", R1-2100786, presents their opinions on enhancement on BM for multi-TRP MODERATOR (QUALCOMM): "Summary #3 of email discussions [104b-e-NR-feMIMO-02] for mTRP PDCCH enhancements", R1-2103915, provides a summary of email discussions for mTRP PDCCH enhancements. Certain abbreviations that may be found in the description and/or in the Figures are herewith defined as follows: ALAggregation LevelBDBlind DecodingCORESETControl Resource SetCSSCommon Search SpaceDCIDownlink Control InformationgNB5G Node BMAC CEMAC Control ElementM-TRPMulti Transmission and Reception PointOFDMOrthogonal Frequency-Division MultiplexingPDCCHPhysical Downlink Control ChannelPDSCHPhysical Downlink Shared ChannelQCLQuasi Co-LocationSSSearch SpaceSSSetSearch Space SetTCITransmission Configuration IndicatorTRPTransmission and Reception PointUEUser EquipmentUSSUE-Specific Search Space At the time of this application, as the demand for radio access continues to increase, there exists a need for further improvements in different aspects of communication systems including improving data rate, latency, reliability, and/or mobility for wireless communication for cellular wireless communication systems, such as for 5G NR. Such improvements relate to control resource set selection operations for such communications. Example embodiments of the invention work to further improve such operations. SUMMARY: The invention is set out in the appended set of claims. BRIEF DESCRIPTION OF THE DRAWINGS: The above and other aspects, features, and benefits of various embodiments of the present disclosure will become more fully apparent from the following detailed description with reference to the accompanying drawings, in which like reference signs are used to designate like or equivalent elements. The drawings are illustrated for facilitating better understanding of the embodiments of the disclosure and are not necessarily drawn to scale, in which: FIG. 1 shows a procedure for generating PDCCH from DCI;FIG. 2 shows an example of monitoring overlapping CORESETs with different QCL-TypeD with PDCCH repetition based on linkage in accordance with example embodiments of the invention;FIG. 3 shows an example of monitoring overlapping CORESETs with different QCL-TypeD with PDCCH repetition based on SS sets which are linked among other SS sets in accordance with example embodiments of the invention;FIG. 4 shows an example of monitoring overlapping CORESETs with different QCL-TypeD with PDCCH repetition and CSS/USS IDs are not associated with the first (selected) CORESET QCL-TypeD in accordance with example embodiments of the invention;FIG. 5 shows flow diagram illustrating the UE operation considering 2 discussed options for PDCCH repetition with multiple overlapping CORESETs with different QCL-TypeD in accordance with example embodiments of the invention;FIG. 6 shows a high level block diagram of various devices used in carrying out various aspects of the invention; andFIG. 7 shows a method in accordance with example embodiments of the invention which may be performed by an apparatus. DETAILED DESCRIPTION: In example embodiments of the invention there is at least a method and apparatus to perform determining CORESETs with different QCL-TypeDs using PDCCH repetition for monitoring physical resources. Example embodiments of the invention can relate to 3GPP New Radio (NR) physical layer design. More specifically, we focus on facilitating physical downlink control channel (PDCCH) candidates Search Space Sets (S SSets) linking when repetition and beam diversity for PDCCH transmissions is applied. From the physical layer perspective, the data and signalling messages in NR are carried in the downlink (DL) and uplink (UL) physical channels. Among these channels, the PDCCH plays a central role in, for example, DL scheduling assignments, UL scheduling grants. The PDCCH in NR carries Downlink Control Information (DCI). DCI contains the scheduling information for the UL or DL data channels an