Codebook Design for 5G Non-Precoded MIMO Signaling
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Solution Overview
Problem
Existing channel quality reporting processes in wireless communication systems do not adequately accommodate the reporting of channel state information associated with large two-dimensional array transmit antennas, leading to inefficiencies in channel quality measurement and reporting, especially in 5G communication systems that utilize full-dimension MIMO technology.
Innovation Solution
The development of methods and apparatuses for codebook design and signaling that enable user equipment (UE) to receive and process configuration information for channel state information (CSI) and CSI reference signals, allowing for accurate CSI reporting with reduced feedback overhead, specifically designed for non-precoded MIMO types and beamformed CSI-RS resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing channel quality reporting processes are used, then system compatibility is maintained, but measurement precision and reporting accuracy for large two-dimensional array transmit antennas deteriorate
Solution Approach 1:
The patent changes the parameters of channel quality reporting by introducing new reporting formats and measurement methods specifically designed for large two-dimensional array transmit antennas. This includes modifying CSI reporting structures to accommodate the unique characteristics of FD-MIMO systems, thereby improving measurement precision without sacrificing adaptability to new antenna configurations
Solution Approach 2:
The patent implements dynamic adaptation mechanisms that allow the channel quality reporting process to adjust its behavior based on the detected MIMO type and antenna configuration. The system dynamically selects appropriate reporting formats and measurement procedures, enabling it to maintain high accuracy for both traditional and large two-dimensional array configurations
2Adaptability or versatility
If codebook parameters are received for non-precoded MIMO types, then adaptability to different MIMO configurations is improved, but device complexity increases
Solution Approach 1:
The patent segments the configuration information reception and processing into distinct stages and components. Configuration parameters are divided into mandatory and optional parts, with different processing paths for different MIMO types. This segmentation reduces the complexity burden on the UE by providing a structured, modular approach to handling diverse configuration scenarios
Solution Approach 2:
The patent implements a universal configuration framework that can handle multiple MIMO types through a common interface and processing structure. The same basic configuration mechanisms serve both traditional and advanced MIMO configurations, reducing overall system complexity while maintaining broad adaptability
3Productivity
If feedback overhead is reduced, then system efficiency is improved, but information completeness for accurate CSI reporting may deteriorate
Solution Approach 1:
The patent extracts and separates critical CSI information from the complete reporting set, identifying and transmitting only the most essential parameters with high reliability. Less critical information is either derived at the receiver side or transmitted with lower overhead, achieving an optimal balance between information completeness and feedback efficiency
Solution Approach 2:
The patent implements partial reporting mechanisms where the UE reports only a subset of available CSI parameters based on configuration and channel conditions. This partial action approach reduces feedback overhead while maintaining sufficient information for effective channel quality assessment and link adaptation
Data Source
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AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). Methods and apparatuses for codebook design and signaling are provided. A user equipment (UE) apparatus for codebook design and signaling includes a processor and a transceiver operably connected to the processor. The transceiver is configured to receive configuration information for a channel state information (CSI) process, receive configuration information for a CSI reference signal (CSI-RS) resource; receive configuration information for a MIMO type; and receive a plurality of codebook parameters when the MIMO type is non-precoded. A base station (BS) apparatus for codebook design and signaling includes a transceiver and a processor operably connected to the transceiver. The processor is configured to configure a UE with a CSI process and a CSI-RS resource, configure the UE with a MIMO type, and cause the transceiver to transmit configuration information for the CSI process, the CSI-RS resource, and the MIMO type to the UE.