Multi-TU PUSCH Spatial Relation Configuration
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting high data traffic, increased data rates, and low latency while maintaining energy efficiency, particularly in receiving Physical Uplink Shared Channels (PUSCH) due to resource shortages and beam quality deterioration.
Innovation Solution
A method for a base station to configure and receive a multi-TU PUSCH by transmitting messages related to spatial relation Reference Signals (RS) applied to each time unit (TU) group, allowing for different beams to be used for each TU group, reducing signaling overhead, and mapping spatial relation RS according to UE capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a single spatial relation RS is applied to all time units for multi-TU PUSCH transmission, then signaling overhead is reduced, but communication reliability deteriorates when beam quality changes occur across different time units
Solution Approach 1:
The patent divides the time units into multiple TU groups and applies different spatial relation RS configurations to each group. This segmentation allows the system to adapt to beam quality changes in different time periods while maintaining manageable signaling overhead through group-level rather than individual-TU configuration.
Solution Approach 2:
The patent introduces dynamic spatial relation RS switching capability where the base station can indicate different spatial relation RS for different TU groups based on varying channel conditions. This dynamic adaptation enables the system to respond to beam quality deterioration in specific time units without reconfiguring all time units, thus improving reliability while controlling signaling overhead.
2Reliability
If different spatial relation RS are configured for each time unit to adapt to beam quality changes, then communication reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent merges multiple time units into TU groups and applies a common spatial relation RS configuration to each group. This merging reduces the number of separate configurations needed compared to individual TU configuration, thereby lowering signaling overhead while still allowing different groups to have different spatial relations adapted to their respective beam quality conditions.
Solution Approach 2:
The patent applies the principle of local quality by allowing different spatial relation RS configurations for different TU groups based on local channel conditions. Each TU group can have spatial relations optimized for its specific time period's beam quality, achieving localized adaptation without requiring system-wide reconfiguration for every condition change.
3Productivity
If multi-TU PUSCH transmission is implemented to increase data rate, then productivity is improved, but system complexity increases due to beam management across multiple time units
Solution Approach 1:
The patent segments the multi-TU transmission into TU groups with distinct spatial relation RS configurations. This segmentation simplifies beam management by creating manageable units that can be independently configured, reducing the overall complexity compared to managing each TU individually while still supporting high data rates through multi-TU transmission.
Solution Approach 2:
The patent changes the spatial relation RS parameter dynamically across different TU groups to adapt to varying channel conditions. This parameter change approach allows the system to maintain optimal beam configurations for high data rate transmission without requiring complex real-time beam switching, as the configurations are predetermined for each TU group.
Data Source
AI summary
A method for receiving, by a base station, a physical uplink shared channel (PUSCH) in a wireless communication system includes: transmitting a first message including information related to a configuration of a multi-TU PUSCH transmitted in a plurality of time units (TUs); transmitting a second message related to a spatial relation RS applied to the transmission of the multi-TU PUSCH; and receiving the multi-TU PUSCH. The plurality of time units (TUs) are classified into a plurality of TU groups, and the second message includes information indicating at least one spatial relation RS applied to each TU group among the plurality of TU groups.