UE xPUSCH CSI and Beam Reporting Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in LTE and 5G networks, face challenges in efficiently reporting channel state information and beam quality indicators from user equipment (UE) to base stations, which affects modulation and coding schemes, and beam management in MIMO systems.
Innovation Solution
User equipment (UE) transmits channel state information, including channel quality indicators, precoding matrix indicators, and beam information, over the extra-large physical uplink shared channel (xPUSCH), using specific reporting modes and indicators triggered by uplink grants from the base station, allowing for precise feedback on channel quality and beam strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel state information and beam information are reported using existing LTE/5G mechanisms, then the reporting process is standardized, but the reporting efficiency and precision for beam management is insufficient
Solution Approach 1:
The patent combines channel state information reporting and beam information reporting into a unified feedback mechanism. The UE reports both CSI (including CQI, PMI, RI) and beam quality indicators (RSRP, RSRQ) through integrated uplink messages, allowing the base station to simultaneously optimize both channel encoding and beam selection based on comprehensive feedback
Solution Approach 2:
The patent introduces beam reference signals as intermediary reference measurements that enable precise beam quality assessment. These reference signals serve as mediators between the physical beam transmission and the higher-layer beam management decisions, allowing accurate beam identification and quality reporting
2Adaptability or versatility
If multiple beams are used in MIMO systems, then coverage and capacity are improved, but the complexity of beam management and information reporting increases
Solution Approach 1:
The patent segments beam information reporting into distinct components: beam identification (using reference signal indices), beam quality measurement (RSRP/RSRQ), and beam selection indicators. This segmentation allows the base station to process different beam parameters independently while maintaining overall beam management coherence across multiple beams
Solution Approach 2:
The patent changes the reporting parameters to be more compact and efficient for multi-beam scenarios. Instead of reporting full channel matrices for each beam, the system uses differential reporting where only changes from reference beams are reported, and uses codebook-based precoding indicators that implicitly represent multiple beam combinations
Data Source
AI summary
An apparatus of a user equipment (UE) may include a memory and one or more processors operatively coupled to the memory. The processors may process a scheduling trigger to provide channel state information (CSI) and beam information using extra-large physical uplink shared channel (xPUSCH). The processing device may also generate a reporting message comprising CSI and beam information. The processing device may then encode xPUSCH data to include the reporting message.