UE-Recommended Configurations for Reliable Multi-Transmission Downlink
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Solution Overview
Problem
Existing wireless communication systems face challenges in improving the reliability of downlink transmissions from a base station to user equipment (UE) by consistently selecting a single best configuration, which limits the benefit of using different configurations across multiple transmissions.
Innovation Solution
The UE determines preferred configurations, such as candidate beam configurations, and recommends them to the base station, which then uses these configurations for multiple downlink transmissions, enhancing transmit diversity and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single best configuration is selected for downlink transmissions, then device complexity is reduced, but transmission reliability deteriorates due to limited diversity
Solution Approach 1:
The patent segments the configuration selection process into two parts: the UE determines and recommends multiple candidate configurations, while the base station selects the final configuration. This segmentation allows the UE to leverage its knowledge of channel conditions to provide diverse configuration options, improving reliability without significantly increasing base station complexity.
Solution Approach 2:
The UE performs preliminary action by determining and recommending candidate configurations before the actual downlink transmission. This preliminary configuration recommendation enables the base station to have multiple viable options ready, ensuring that the most appropriate configuration can be selected based on current channel conditions, thereby improving transmission reliability.
2Reliability
If multiple different configurations are used across transmissions, then transmission reliability improves through diversity, but device complexity increases
Solution Approach 1:
The patent inverts the traditional approach by having the UE (rather than the base station) determine and recommend the configurations. Since the UE has direct knowledge of its receive conditions, this inversion simplifies the configuration management at the base station while maintaining the benefits of multiple diverse configurations for improved reliability.
Solution Approach 2:
The UE provides feedback to the base station by recommending candidate configurations based on its measurements and channel conditions. This feedback mechanism enables the base station to select configurations that are optimized for the UE's specific conditions, achieving high reliability without the base station needing to independently analyze all possible configurations.
3Reliability
If UE provides configuration recommendations, then transmission reliability improves through tailored configurations, but information processing load increases
Solution Approach 1:
The patent extracts only the essential configuration recommendation information from the UE's extensive channel state information. Rather than processing all available data, the system extracts and transmits only the candidate configuration indices that the UE has determined to be most suitable, significantly reducing the information processing load while maintaining the reliability benefits of tailored configurations.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for improving the reliability of downlink transmissions from a base station to a user equipment (UE). The UE may determine one or more preferred configurations for the base station to use to transmit multiple downlink transmissions to the UE, and the UE may transmit a recommendation of the preferred configuration(s) to the base station. The base station may then determine configurations to use for the multiple downlink transmissions based on the recommendation received from the UE, and the base station may transmit the downlink transmissions to the UE using the determined configurations. Because the UE may provide the recommendation of the preferred configuration(s) to the base station, the configurations used by the base station for the multiple downlink transmissions may be selected specifically for the UE. Thus, the reliability of the downlink transmissions may improve.