PUCCH Power Control Across Multiple TRPs Using Grouped Resources
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Solution Overview
Problem
Existing power control mechanisms for PUCCH transmissions in NR are inadequate for supporting multiple TRPs, as they do not effectively manage power control for uplink control channels transmitted to multiple transmission/receive points, leading to inefficiencies and potential interference.
Innovation Solution
Implement a power control mechanism that configures multiple PUCCH groups and CORESET groups, along with enhanced power control parameters, including more than 8 P0 values and 4 pathloss reference signals, to manage PUCCH transmissions to multiple TRPs, using DCI format 2_2 for TPC commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing power control mechanisms for PUCCH transmissions are used, then the system maintains simplicity in power control configuration, but the system cannot effectively support multiple TRPs leading to interference and reliability issues
Solution Approach 1:
The patent divides the power control configuration into multiple PUCCH groups, where each group is associated with specific TRPs and has its own power control parameters. This segmentation allows independent power control for each TRP connection, improving reliability without requiring a complete redesign of the power control system.
Solution Approach 2:
The patent introduces TRP-specific power control parameters (P0, pathloss reference signals) that are locally optimized for each TRP connection. Each PUCCH group can have different power settings tailored to the specific characteristics of its associated TRPs, rather than using a single global power control configuration.
2Reliability
If multiple PUCCH transmissions to multiple TRPs are supported, then the system improves coverage and reliability, but power control management becomes inadequate leading to interference
Solution Approach 1:
The patent introduces new power control parameters (P0 values, pathloss reference signals) that are specifically configured for multiple TRP scenarios. By changing and expanding the parameter set to include TRP-specific values, the system can independently control power levels for each TRP connection, preventing interference while maintaining reliability.
Solution Approach 2:
The patent implements enhanced feedback mechanisms where the network can provide TRP-specific power control adjustments. This allows dynamic optimization of power levels for each TRP connection based on actual channel conditions, reducing interference while maintaining robust transmissions.
3Adaptability or versatility
If traditional power control parameters are used, then the configuration remains manageable, but the system lacks the necessary parameters to effectively control power for multiple TRPs
Solution Approach 1:
The patent extends the existing power control framework to serve multiple functions - it can handle both single TRP and multiple TRP scenarios using a unified configuration approach. The PUCCH group concept provides a universal structure that works for different deployment scenarios, making the system versatile without requiring completely separate parameter sets for different use cases.
Data Source
AI summary
A base station includes at least one memory and at least one processor coupled with the at least one memory. The at least one processor is configured to cause the base station to configure one or more PUCCH groups for a remote unit by higher layer signaling. The one or more PUCCH groups each contain one or more PUCCH resources. The at least one processor is also configured to cause the base station to configure one or more control resource set (CORESET) groups for the remote unit by higher layer signaling. Each CORESET of a same CORESET group is configured with a same higher layer signaling. Each of the PUCCH groups is associated with one of the CORESET groups.