Multi-slot PDSCH Beam Diversity via Slot-level Selection
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Solution Overview
Problem
Current mobile and wireless telecommunication systems, particularly in 5G and NR technologies, face challenges in achieving robust and efficient beam diversity for multi-slot communication channels, which is essential for maintaining connectivity and data integrity in high-blocking environments and reducing beam reporting frequency.
Innovation Solution
The implementation of a method that involves receiving configuration for a multi-slot transmission mode, selecting candidate transmit beams, determining the appropriate transmit beam for each slot, and applying a corresponding reception beam, thereby enabling beam diversity for multi-slot PDSCH transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam diversity is implemented for multi-slot PDSCH transmissions, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the multi-slot transmission into individual slot-level beam selections, where each slot can independently select from a configured set of candidate beams. This segmentation allows the system to achieve diversity benefits across multiple slots while managing complexity through structured beam candidate sets and slot-specific indications.
Solution Approach 2:
The patent applies preliminary action by pre-configuring a set of candidate beams before the multi-slot transmission begins. The network node configures the UE with multiple beam candidates and their associated QCL assumptions in advance, allowing the UE to efficiently select appropriate beams for each slot without real-time complex processing.
2Loss of information
If beam reporting frequency is reduced, then loss of information decreases, but measurement precision deteriorates
Solution Approach 1:
The patent performs preliminary beam quality measurements and configurations before the multi-slot transmission. The network configures QCL assumptions and beam candidates based on prior measurements, enabling the system to maintain measurement precision while reducing the frequency of beam reporting during the actual transmission.
Solution Approach 2:
The patent uses QCL (Quasi-Co-Location) assumptions to copy spatial relationship information from reference signals to PDSCH transmissions. This allows the system to infer beam quality characteristics without performing new measurements, thereby reducing information loss while maintaining effective measurement precision through reference to previously measured beam properties.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for applying beam diversity for multi-slot physical downlink shared channel (PDSCH) are provided. One method may include receiving configuration of a multi-slot transmission mode for a multi-slot communication channel. The method may also include receiving, based on the configuration of the multi-slot transmission mode, transmission configuration indications of a plurality of transmit beams for slots in the multi-slot communication channel. A selected set of candidate transmit beams may be received among the plurality of transmit beams for the slots in the multi-slot communication channel. The method may also include determining, among the selected set of candidate transmit beams, which transmit beam is used for each slot in the multi-slot communication channel, and applying a reception beam corresponding to each transmit beam used for each slot in the multi-slot communication channel.