Single Precoder Indication for Multi-Panel Uplink MIMO Signaling
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Solution Overview
Problem
Current wireless communication systems lack efficient methods to signal and configure precoders for multi-panel, non-codebook uplink MIMO transmissions, leading to increased signaling overhead and inefficiency.
Innovation Solution
A single precoder indication is used in downlink control information (DCI) to indicate precodings for multiple antenna panels, improving signaling efficiency and reducing overhead by indexing precoders across multiple panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate precoder indications are provided for each antenna panel, then precoding configuration accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges multiple separate precoder indications into a single precoder indication that applies to multiple antenna panels simultaneously. This is achieved by defining a single precoder indication field in the DCI that can indicate precoders for multiple panels, thereby reducing the total number of bits required for signaling while maintaining the ability to configure precoding for each panel.
Solution Approach 2:
The single precoder indication is designed to serve multiple antenna panels universally. The indication can point to different precoders for different panels based on a predefined mapping relationship, allowing one indication to perform the function of multiple separate indications would otherwise be needed.
2Reliability
If multiple precoder indications are provided for multi-panel transmissions, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the precoder configuration into a mapping relationship stored in the UE and a single dynamic indication in the DCI. The mapping relationship pre-associates precoders with antenna panel indices, allowing the UE to independently determine the appropriate precoder for each panel based on the single indication without requiring complex real-time processing.
3Ease of manufacture
If codebook-based precoding is used, then implementation simplicity is improved, but adaptability to channel conditions deteriorates
Solution Approach 1:
The patent implements non-codebook-based precoding where the precoder is dynamically determined based on the indicated precoder index and the current antenna panel configuration rather than being selected from a pre-defined codebook. This allows the system to adapt precoding to actual channel conditions and panel configurations while maintaining implementation simplicity through the use of index-based selection.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, downlink control information that indicates a single precoder indication associated with non-codebook usage. The UE may transmit, to the base station, a single antenna-panel uplink transmission or a multiple antenna-panel uplink transmission based at least in part on a determination of whether the single precoder indication indicates the single antenna-panel uplink transmission or the multiple antenna-panel uplink transmission. Numerous other aspects are provided.