Precoder Indication Segmentation for DCI Overhead Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication technologies, such as LTE and NR, face inefficiencies in scheduling multi-panel transmissions due to the significant overhead required to indicate precoders for each antenna panel in downlink control information (DCI).
Innovation Solution
The method involves selecting a first precoder indicator from a set of precoder indicators and a second precoder indicator from a subset of those indicators, reducing the number of bits needed to identify the second precoder, thereby reducing the overhead in DCI, allowing for more efficient scheduling of multi-panel transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a precoder indicator is indicated for each antenna panel in DCI, then the scheduling capability for multi-panel transmissions is improved, but the overhead in DCI increases significantly
Solution Approach 1:
The precoder indication is segmented into two parts: a first precoder indicator applied to a first antenna panel and a second precoder indicator applied to a second antenna panel. This segmentation allows independent optimization of each panel's precoding while reducing the total indication overhead compared to indicating all precoders individually for each panel.
Solution Approach 2:
The patent applies partial action by indicating precoders for only the necessary antenna panels rather than all panels. The first precoder indicator is indicated for a first antenna panel while the second precoder indicator is indicated for a second antenna panel, providing sufficient precoding capability for multi-panel transmissions without the excessive overhead of indicating precoders for every possible panel configuration.
2Quantity of substance
If the number of bits to identify the second precoder is reduced, then the overhead in DCI is reduced, but the precision of precoder indication may be compromised
Solution Approach 1:
Different precision levels are applied to different precoder indicators based on local requirements. The first precoder indicator maintains full precision for the first antenna panel, while the second precoder indicator uses reduced precision for the second antenna panel. This local quality differentiation reduces total bit overhead while maintaining sufficient precision where needed.
Solution Approach 2:
The patent changes the parameter of precision for the second precoder indicator by using a subset of the full precoder indicator set. This parameter change reduces the number of bits required to indicate the second precoder while still providing adequate precoding options for the second antenna panel, thereby reducing DCI overhead without completely sacrificing indication precision.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive downlink control information that identifies a first precoder indicator selected from a set of precoder indicators and a second precoder indicator selected from a subset of the set of precoder indicators. The UE may communicate using multiple antenna panels based at least in part on the first precoder indicator and the second precoder indicator. Numerous other aspects are provided.