Multi-Panel Uplink Transmission with SRS Resource Sets
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Solution Overview
Problem
Current uplink transmission schemes for user equipment (UE) with multiple panels in multi-TRP systems do not provide an optimized solution to support simultaneous transmission of physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH) towards different multi-transmission/reception points (TRPs) from multiple panels.
Innovation Solution
The proposed solution involves configuring user equipment (UE) with multiple sounding reference signal (SRS) resource sets and transmission configuration indicator (TCI) states, allowing the UE to efficiently transmit uplink transmissions such as PUSCH or PUCCH with two panels simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current uplink transmission scheme is used for UE with multiple panels, then the system maintains simple configuration and operation, but the uplink transmission performance and reliability are insufficient due to lack of optimized multi-panel support
Solution Approach 1:
The patent segments the SRS resources into multiple independent resource sets, where each resource set can be independently configured and activated for different panels. This allows the system to support multiple panels without requiring complete reconfiguration of all SRS resources, thereby improving uplink transmission reliability through diversified panel usage while maintaining manageable configuration complexity.
Solution Approach 2:
The patent introduces dynamic activation and deactivation mechanisms for SRS resource sets, allowing the base station to flexibly enable or disable specific resource sets based on current transmission needs. This dynamic approach enables the system to adapt to varying uplink transmission requirements across multiple panels without permanently increasing configuration complexity, thus resolving the contradiction between reliability and complexity.
2Productivity
If multiple SRS resource sets and TCI states are configured for simultaneous multi-TRP transmission, then the uplink transmission performance improves, but the configuration and management complexity increases
Solution Approach 1:
The patent designs SRS resource sets with multi-functional capabilities, where each resource set can serve multiple purposes including uplink channel sounding, beam management, and transmission configuration. This universal design allows the same resource set structure to support various uplink transmission scenarios (single-TRP, multi-TRP, different panels) without requiring separate configurations for each scenario, thereby improving uplink transmission efficiency while controlling configuration complexity.
Solution Approach 2:
The patent utilizes parameter changes in TCI states and SRS resource set configurations to enable flexible multi-TRP transmission. By modifying specific parameters (such as spatial filter indicators, power control parameters, and resource allocation) within the existing configuration framework, the system can achieve efficient multi-panel transmission without fundamentally changing the overall configuration structure, thus balancing productivity improvement with complexity management.
Data Source
AI summary
A method of uplink transmission with multiple panels, by a user equipment (UE) includes being configured, by a base station, with a plurality of sounding reference signal (SRS) resource sets, wherein the SRS resource sets include a first SRS resource set and a second SRS resource set; being configured, by the base station, with a plurality of transmission configuration indicator (TCI) states associated with an uplink transmission, wherein the TCI states include a first TCI state and a second TCI state; and being indicated, by the base station, to transmit the uplink transmission with the first TCI state and/or the second TCI state.