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CN-116530028-B - Method and apparatus for port selection codebook based CSI reporting

CN116530028BCN 116530028 BCN116530028 BCN 116530028BCN-116530028-B

Abstract

The present disclosure relates to a communication method and system for fusing higher data rates and internet of things (IoT) technologies that support more than fourth generation (4G) systems. The present disclosure may be applied to intelligent services based on 5G communication technology and internet of things related technology, such as intelligent home, intelligent building, intelligent city, intelligent car, networking car, healthcare, digital education, intelligent retail, security and security services. The present disclosure relates to methods and apparatus for port-selection codebook-based CSI reporting.

Inventors

  • M.S. Rachman
  • E. N. ngosanusi

Assignees

  • 三星电子株式会社

Dates

Publication Date
20260508
Application Date
20211020
Priority Date
20211015

Claims (15)

  1. 1. A User Equipment (UE) in a communication system, the UE comprising: Transceiver, and A processor operably coupled to the transceiver and configured to: Receiving a configuration associated with a codebook from a Base Station (BS) via Radio Resource Control (RRC) signaling, the configuration including parameters associated with a first parameter Associated information and second parameters corresponding to a plurality of vectors Associated information in which And (C) sum Based on the codebook-associated configuration, a Channel State Information (CSI) report is transmitted to the BS, Wherein, in And is also provided with In the case of (a), the CSI report includes and Precoding Matrix Indicator (PMI) index associated with each vector, and Wherein the PMI index includes A number of bits for reporting, where Is a round-up function.
  2. 2. The UE of claim 1, wherein, in And is also provided with In the case of (a) the number of the cells, The individual vectors are based on the information indicated by the PMI index Is identified.
  3. 3. The UE of claim 2, wherein: When (when) At this time, based on the codebook-associated configuration via RRC signaling, from Determination of A kind of electronic device When (when) In the time-course of which the first and second contact surfaces, Is 0, and Depending on the PMI index.
  4. 4. The UE of claim 3, wherein, in And is also provided with In the case of (2), the values 0,1, 2 of the PMI index indicate respectively The values of (2) are 1, 2, 3.
  5. 5. The UE of claim 1, wherein the determined if the CSI report corresponds to multiple layers The individual vectors are common to all layers.
  6. 6. The UE of claim 1, wherein, in In the case of (a) the number of the cells, The individual vectors include , Wherein Wherein Is the total number of precoding matrices, and Wherein for the following , Corresponding to Index of the individual vectors.
  7. 7. The UE of claim 1, wherein The index of the individual vectors is determined from {0, 1., Determination of (1) wherein Is a value from the configuration of the value set 2,4, Is the total number of precoding matrices.
  8. 8. A Base Station (BS) in a communication system, the BS comprising: Transceiver, and A processor operably coupled to the transceiver and configured to: Generating a configuration associated with the codebook, the configuration including a first parameter Associated information and second parameters corresponding to a plurality of vectors Associated information in which And (C) sum Transmitting the codebook-associated configuration to a User Equipment (UE) via Radio Resource Control (RRC) signaling, and A Channel State Information (CSI) report is received from the UE, Wherein the CSI report is based on the codebook-associated configuration, an Wherein, in And is also provided with In the case of (a), the CSI report includes and Precoding Matrix Indicator (PMI) index associated with each vector, and Wherein the PMI index includes A number of bits for reporting, where Is a round-up function.
  9. 9. The BS of claim 8, wherein in And is also provided with In the case of (a) the number of the cells, The individual vectors are based on the information indicated by the PMI index Is identified.
  10. 10. The BS of claim 9, wherein: When (when) At this time, according to the codebook-associated configuration via RRC signaling, from Is determined in (1) A kind of electronic device When (when) In the time-course of which the first and second contact surfaces, Is 0, and Depending on the PMI index.
  11. 11. The BS of claim 10, wherein, in And is also provided with In the case of (2), the values 0,1, 2 of the PMI index indicate respectively The values of (2) are 1, 2, 3.
  12. 12. The BS of claim 8, wherein, in In the case of (a) the number of the cells, The individual vectors include , Wherein Wherein Is the total number of precoding matrices, and Wherein for the following , Corresponding to Index of the individual vectors.
  13. 13. The BS of claim 8, wherein The index of the individual vectors is determined from {0, 1., Determining, wherein Is a value from the configuration of the value set 2,4, Is the total number of precoding matrices.
  14. 14. A method for operating a User Equipment (UE), the method comprising: Receiving a configuration associated with a codebook from a Base Station (BS) via Radio Resource Control (RRC) signaling, the configuration including parameters associated with a first parameter Associated information and second parameters corresponding to a plurality of vectors Associated information in which ; Based on the codebook-associated configuration, a Channel State Information (CSI) report is transmitted to the BS, Wherein, in And is also provided with In the case of (a), the CSI report includes and Precoding Matrix Indicator (PMI) index associated with each vector, and Wherein the PMI index includes A number of bits for reporting, where Is a round-up function.
  15. 15. A method for operating a Base Station (BS), the method comprising: Generating a configuration associated with the codebook, the configuration including a first parameter Associated information and second parameters corresponding to a plurality of vectors Associated information in which ; Transmitting configuration for said codebook associated to User Equipment (UE) via Radio Resource Control (RRC) signaling, and A Channel State Information (CSI) report is received from the UE, Wherein the method comprises the steps of The CSI report is based on the codebook-associated configuration, and Wherein, in And is also provided with In the case of (a), the CSI report includes and Precoding Matrix Indicator (PMI) index associated with each vector, and Wherein the PMI index includes A number of bits for reporting, where Is a round-up function.

Description

Method and apparatus for port selection codebook based CSI reporting Technical Field The present disclosure relates generally to wireless communication systems, and more particularly, to codebook-based CSI reporting. Background In order to meet the increasing demand for wireless data traffic since the deployment of 4G communication systems, efforts have been made to develop improved 5G or front 5G communication systems. Therefore, the 5G or front 5G communication system is also referred to as a 'post 4G network' or a 'post LTE system'. A 5G communication system is considered to be implemented in a higher frequency (millimeter wave) band (e.g., 60GHz band) in order to achieve higher data rates. In order to reduce propagation loss of radio waves and increase transmission distance, beamforming, massive Multiple Input Multiple Output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, massive antenna techniques are discussed in 5G communication systems. Further, in the 5G communication system, development of system network improvement is underway based on advanced small cells, cloud Radio Access Networks (RANs), ultra dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, cooperative multipoint (CoMP), reception-side interference cancellation, and the like. In 5G systems, hybrid FSK and QAM modulation (FQAM) and Sliding Window Superposition Coding (SWSC) have been developed as Advanced Code Modulation (ACM), as well as Filter Bank Multicarrier (FBMC), non-orthogonal multiple access (NOMA) and Sparse Code Multiple Access (SCMA) as advanced access techniques. The internet is an artificially-centric connected network in which humans generate and consume information, and is now evolving towards the internet of things (IoT) in which distributed entities, such as things, exchange and process information without human intervention. Through connection with cloud servers, internet of everything (IoE) has emerged that combines IoT technology with big data processing technology. As technical elements required to implement IoT, such as "sensing technology", "wired/wireless communication and network infrastructure", "service interface technology" and "security technology", sensor networks, machine-to-machine (M2M) communication, machine Type Communication (MTC), etc., have recently been studied. Such IoT environments may provide intelligent internet technology services that create new value for human life by collecting and analyzing data generated between the interconnects. With the convergence and integration between existing Information Technology (IT) and various industrial applications, ioT may be applied in a variety of fields including smart homes, smart buildings, smart cities, smart cars or networked cars, smart grids, healthcare, smart appliances, and advanced medical services. In response to this, various attempts have been made to apply 5G communication systems to IoT networks. For example, techniques such as sensor networks, machine Type Communications (MTC), and machine-to-machine (M2M) communications may be implemented by beamforming, MIMO, and array antennas. The application of cloud Radio Access Networks (RANs) as the big data processing technology described above may also be considered as an example of a convergence between 5G technology and IoT technology. Understanding and properly estimating the channel between a User Equipment (UE) and a Base Station (BS), e.g., gNode B (gNB), is important for efficient and effective wireless communications. To properly estimate DL channel conditions, the gNB may send reference signals (e.g., CSI-RS) to the UE for DL channel measurements, and the UE may report (e.g., feedback) information (e.g., CSI) about the channel measurements to the gNB. With this DL channel measurement, the gNB can select appropriate communication parameters to efficiently and effectively perform wireless data communication with the UE. Disclosure of Invention Technical problem It is known in the literature that UL-DL channel reciprocity can exist in the angle domain and the delay domain if the UL-DL duplex distance is small. Due to the delayed transformation in the time domain (or close correlation) of the basis vectors in the Frequency Domain (FD), rel.16 enhancement type II port selection can be further extended to angle and delay domains (or SD and FD). Specifically, the DFT-based SD base in W 1 and the DFT-based FD base in W f may be replaced with SD and FD port selections, i.e., L CSI-RS ports in SD and/or M ports in FD. In this case, the CSI-RS ports are beamformed in SD (assuming UL-DL channel reciprocity in the angle domain) and/or FD (assuming UL-DL channel reciprocity in the delay/frequency domain), and the corresponding SD and/or FD beamforming information may be obtained at gNB based on the UL channel estimated using SRS measurements. The present disclosure provides some design components (component