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CN-121986447-A - CRI-based CSI reporting

CN121986447ACN 121986447 ACN121986447 ACN 121986447ACN-121986447-A

Abstract

The present disclosure relates to 5G or 6G communication systems for supporting higher data transmission rates. Apparatus and methods for enhancing Channel State Information (CSI) reporting for hybrid beamforming. A method performed by a User Equipment (UE) includes receiving information about a CSI report, K s CSI reference signal (CSI-RS) resources, and a value of M, where K s >1,1<M≤min(X,K s ), and X is an integer. The method further includes measuring K s CSI-RS resources based on the information and determining CSI reports associated with M of the K s CSI-RS resources. The CSI report includes M CSI-RS resource indicators (CRI), M Precoding Matrix Indicators (PMIs), and M Channel Quality Indicators (CQIs). The method further includes transmitting the CSI report.

Inventors

  • LI JIYUAN
  • E. N. Angosanus
  • M.S. Rachman

Assignees

  • 三星电子株式会社

Dates

Publication Date
20260505
Application Date
20240920
Priority Date
20240906

Claims (15)

  1. 1. A user equipment, UE, comprising: A transceiver configured to receive information about (i) channel state information, CSI, reports, (ii) Ks CSI reference signal, CSI-RS, resources, and (iii) a value of M, wherein Ks >1,1< M≤min (X, ks), and X is an integer, and A processor operably coupled to the transceiver, the processor configured to, based on the information: measuring Ks CSI-RS resources, and Determining a CSI report associated with M CSI-RS resources of the Ks CSI-RS resources, wherein the CSI report comprises: M CSI-RS resource indicators CRI, M precoding matrix indicators PMI, and M channel quality indicators CQI, Wherein the transceiver is further configured to transmit a CSI report.
  2. 2. The UE of claim 1, wherein Ks e {2,3,4,5,6,7,8} when a number of CSI-RS ports for each of the Ks CSI-RS resources is configured to be less than or equal to 16 ports.
  3. 3. The UE of claim 1, wherein Ks e {2,3,4} when a number of CSI-RS ports for each of the Ks CSI-RS resources is configured to be less than or equal to 32 ports.
  4. 4. The UE of claim 1, wherein the information further includes a radio resource control, RRC, parameter, a number of reports set to 'cri-RI-PMI-CQI' or 'cri-RI-LI-PMI-CQI'.
  5. 5. The UE of claim 1, wherein each CRI of the M CRIs is of size Bit indicator.
  6. 6. The UE of claim 1, wherein: The support value of Ks depends on the first UE capability, and The support value of M depends on the second UE capability.
  7. 7. The UE of claim 1, wherein the value of X corresponds to 2 or 4.
  8. 8. A base station BS, comprising: processor, and A transceiver operably coupled to the processor, the transceiver configured to: Transmitting information about (i) channel state information, CSI, reports, (ii) Ks CSI reference signal, CSI-RS, resources, and (iii) a value of M, wherein Ks >1,1< M≤min (X, ks), and X is an integer, and Receiving a CSI report associated with M CSI-RS resources of the Ks CSI-RS resources, wherein the CSI report comprises: M CSI-RS resource indicators CRI, M precoding matrix indicators PMI, and M channel quality indicators CQI.
  9. 9. The BS of claim 8, wherein Ks e {2,3,4,5,6,7,8} when a number of CSI-RS ports for each of the Ks CSI-RS resources is configured to be less than or equal to 16 ports.
  10. 10. The BS of claim 8, wherein Ks e {2,3,4} when a number of CSI-RS ports for each of the Ks CSI-RS resources is configured to be less than or equal to 32 ports.
  11. 11. The BS of claim 8, wherein each CRI of the M CRIs is of size Bit indicator.
  12. 12. The BS of claim 8, wherein: the supported value of Ks depends on the first user equipment UE capability, and The support value of M depends on the second UE capability.
  13. 13. The BS of claim 9, wherein the value of X corresponds to 2 or 4.
  14. 14. A method performed by a user equipment, UE, the method comprising: receiving information about (i) channel state information, CSI, reports, (ii) Ks CSI reference signals, CSI-RS, resources, and (iii) values of M, wherein Ks >1,1< m+.min (X, ks), and X is an integer; On the basis of the information that is to be mentioned, Measuring Ks CSI-RS resources, and Determining a CSI report associated with M CSI-RS resources of the Ks CSI-RS resources, wherein the CSI report comprises: M CSI-RS resource indicators CRI, M precoding matrix indicators PMI, and M channel quality indicators CQI, and And sending the CSI report.
  15. 15. A method performed by a base station, BS, the method comprising: Transmitting information about (i) channel state information, CSI, reports, (ii) Ks CSI reference signal, CSI-RS, resources, and (iii) a value of M, wherein Ks >1,1< M≤min (X, ks), and X is an integer, and Receiving a CSI report associated with M CSI-RS resources of the Ks CSI-RS resources, wherein the CSI report comprises: M CSI-RS resource indicators CRI, M precoding matrix indicators PMI, and M channel quality indicators CQI.

Description

CRI-based CSI reporting Technical Field The present disclosure relates generally to wireless communication systems, and more particularly, to an apparatus and method for Channel State Information (CSI) reporting based on a RS resource indicator (CRI). Background The 5G mobile communication technology defines a wide frequency band, enabling high transmission rates and new services, and can be implemented not only in the "below 6 GHz" (such as 3.5 GHz) frequency band, but also in the "above 6 GHz" (including 28GHz and 39 GHz) frequency band called millimeter waves. In addition, in order to achieve a transmission rate five ten times faster than that of the 5G mobile communication technology and an ultra-low delay of one tenth of that of the 5G mobile communication technology, the industry has considered to implement the 6G mobile communication technology (referred to as a super 5G system) in a terahertz frequency band (e.g., 95GHz to 3THz frequency band). In the early stages of the development of 5G mobile communication technology, in order to support services and meet performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable low-delay communication (URLLC), and large-scale machine type communication (mMTC), standardization work has been continuously conducted on beamforming and massive MIMO for alleviating millimeter wave radio wave path loss and increasing millimeter wave radio wave transmission distance, support parameter sets (e.g., operating multiple subcarrier intervals) to efficiently utilize dynamic operation of millimeter wave resources and slot formats, support initial access technologies of multi-beam transmission and broadband, definition and operation of BWP (bandwidth part), novel channel coding methods for mass data transmission such as LDPC (low density parity check) codes and polarization codes for control information highly reliable transmission, L2 preprocessing, and network slicing for providing a specific service private network. Currently, considering services that the 5G mobile communication technology will support, discussions about improvement and performance enhancement of the initial 5G mobile communication technology are being developed, and physical layer standardization work has been developed about technologies such as V2X (internet of vehicles technology) for assisting an autonomous vehicle in driving determination and improving user convenience based on information about the position and state of the vehicle transmitted by the vehicle, NR-U (unlicensed band new air interface) intended to make system operation meet various regulatory-related requirements in an unlicensed band, new air interface user equipment saving energy (NR UE Power Saving), non-terrestrial network (NTN) that is to provide UE-satellite direct communication in an area where communication with the terrestrial network is impossible to achieve coverage, and positioning technology. Furthermore, standardization work has been continuously carried out in the air interface architecture/protocol field regarding technologies such as industrial internet of things (IIoT) for supporting new services through interworking and convergence with other industries, IAB (integrated access and backhaul) for providing nodes for network service area extension by supporting wireless backhaul links and access links in an integrated manner, mobility enhancement technologies including conditional handover and DAPS (dual active protocol stack) one-school, and two-step random access technologies (2-step RACH for NR) for simplifying random access procedures. Standardization work has also continued in the system architecture/service area regarding 5G baseline architecture (e.g., service-based architecture or service-based interface) for combining Network Function Virtualization (NFV) and Software Defined Network (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on UE location. With commercialization of the 5G mobile communication system, exponentially growing connection devices will be connected to the communication network, and thus it is expected that enhanced functions and performance of the 5G mobile communication system and integrated operation of the connection devices will be necessary. For this reason, new researches are being proposed for efficiently supporting augmented reality (XR) of Augmented Reality (AR), virtual Reality (VR), mixed Reality (MR), etc., achieving 5G performance improvement and complexity reduction by using Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metauniverse service support, and unmanned aerial vehicle communication. Further, such developments of 5G mobile communication systems will lay the foundation for developing not only new waveforms for providing coverage in the 6G mobile communication technology terahertz frequency band, multi-antenna transmission technologies such as full-dimensional MIMO (FD-MIMO), array antenn