Multi-Panel PUCCH Precoding Control for Channel Estimation
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Solution Overview
Problem
Current communication systems lack a mechanism for the network to control precoding for simultaneous multi-panel Physical Uplink Control Channel (PUCCH) transmissions, leading to potential degradation in demodulation and channel estimation performance.
Innovation Solution
A new precoder indication method and corresponding UE transmission procedure are introduced, allowing the network to control precoding for simultaneous multi-panel PUCCH transmissions by configuring the UE to apply the same precoders used for Spatial Division Multiplexing (SDM) or Single Frequency Network (SFN) based Physical Uplink Shared Channel (PUSCH) transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network does not control precoding for simultaneous multi-panel PUCCH transmissions, then the system operates with existing mechanisms, but channel estimation and demodulation performance deteriorates
Solution Approach 1:
The patent applies universality by enabling the same precoding mechanism to serve multiple purposes: it controls both PUSCH transmissions and PUCCH transmissions. The network device uses the existing precoding control infrastructure to manage precoding across different uplink channel types, eliminating the need for separate control mechanisms while improving PUCCH performance.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network device sends precoding indication information (such as TPC commands or TPMI indicators) that mediates between the network's scheduling decisions and the UE's precoding application. This intermediary control signal enables precise precoding management for PUCCH without requiring complex direct UE-network coordination.
2Measurement precision
If precoding control mechanisms are introduced for simultaneous multi-panel PUCCH transmissions, then channel estimation performance improves, but system complexity increases
Solution Approach 1:
The patent merges the precoding control for PUCCH with the existing PUSCH precoding control mechanisms. By combining these controls into a unified framework where the same network device and signaling pathways manage both channel types, the patent achieves improved demodulation performance without proportionally increasing system complexity.
Solution Approach 2:
The patent enables the system to self-serve by utilizing existing precoding infrastructure and signaling mechanisms to automatically provide precise precoding control for PUCCH. The network device leverages its existing capability to send precoding indications for PUSCH and extends this same capability to PUCCH, allowing the system to improve performance using its own existing resources without external intervention.
3Adaptability or versatility
If separate precoding control is implemented for PUCCH and PUSCH, then transmission flexibility increases, but control signaling overhead increases
Solution Approach 1:
The patent applies universality by designing a precoding control mechanism that simultaneously handles both PUCCH and PUSCH transmissions through the same network device and signaling pathway. This multi-functional approach provides transmission flexibility for different channel types while avoiding the need for separate control signaling, thereby reducing overhead.
Data Source
AI summary
An apparatus includes means for determining to use a set of transmit antenna arrangements for spatial division multiplexing or single frequency network based simultaneous transmission across multiple antenna arrangement physical uplink shared channel transmission; and means for determining to use the set of transmit antenna arrangements for a physical uplink control channel resource transmission, in response to two different transmission configuration indicator states being indicated and the apparatus being configured to apply physical uplink shared channel precoding for simultaneous transmission across multiple antenna arrangement physical uplink shared channel transmission.