Linear Combination Coefficient Coding for Channel State Information Reporting in Multi-Transmit / Receive Point Coherent Joint Transmission

The Type II MIMO codebook optimizes CSI reporting for multi-TRP CJT by encoding non-zero coefficients with differential quantization, addressing the lack of CJT support in 3GPP standards and enhancing network performance.

JP2026503876AActive Publication Date: 2026-02-02APPLE INC
1 Cites 0 Cited by

Patent Information

Application Number
JP2025524985
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-11-04
Filing Date
2023-10-10
Publication Date
2026-02-02
Estimated Expiration
2043-10-10

AI Technical Summary

Technical Problem

Current 3GPP standards do not support coherent joint transmission (CJT) for multi-transmission reception point (TRP) communication scenarios, requiring extended channel state information (CSI) reporting to accommodate multiple non-colocated TRPs.

Method used

Implementing a Type II MIMO codebook for multi-TRP CJT that efficiently encodes CSI reports by grouping non-zero coefficients (NZCs) and differentially quantizing their phases and amplitudes, allowing flexible reporting configurations to reduce signaling overhead.

Benefits of technology

Enhances multi-TRP CJT performance by optimizing CSI reporting to improve beamforming accuracy and reduce signaling overhead, thereby increasing network efficiency and reliability.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

An apparatus, a processor, and a method for channel state information (CSI) reporting for coherent joint transmission using multiple transmit / receive points (TRPs) are provided. In one example, a baseband processor of a user equipment (UE) is configured to determine multiple non-zero coefficients (NZCs) corresponding to linear combination coefficients based on channel state information (CSI) measurement resources transmitted by the multiple transmit / receive points (TRPs). The baseband processor selects a reported NZC from the multiple NZCs, each set of the reported NZCs being associated with a respective transmission layer, and at least one of the sets of reported NZCs includes NZCs associated with at least two different TRPs. The baseband processor is configured to generate a CSI report that encodes information regarding the reported NZCs for each transmission layer, and to perform the CSI report.
Need to check novelty before this filing date? Find Prior Art