Multi-TRP PUCCH Power Control Without Beam Indication
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting uplink control information (UCI) on physical uplink control channels (PUCCH) without defining or indicating beam information, particularly in frequency range 1 (FR1), which can lead to unnecessary complexity and potential interference.
Innovation Solution
Configuring user equipment (UE) to use separate sets of uplink power control parameters for UCI transmissions to multiple transmission-reception points (TRPs) without requiring beam information, by signaling power information separately from beam information, and allowing null values for beam parameters in FR1.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam information is defined and indicated for PUCCH spatial relation information, then transmission reliability to multiple TRPs is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments the spatial relation information configuration into two independent parts: beam information (spatial domain parameters) and power control information (power parameters). By separating these functions, the patent allows power control to be configured independently without requiring full beam information, thus reducing device complexity while maintaining transmission reliability through dedicated power control parameters for each TRP
Solution Approach 2:
The patent extracts the power control information from the complete beam information structure. Specifically, it identifies and separates the power-related parameters (such as pathloss reference signal indicators and power control adjustment states) from the beamforming parameters, allowing the UE to receive and process only the necessary power control information without the overhead of complete beam information definition
2Measurement precision
If separate beam information is configured for each TRP, then transmission precision is improved, but signaling overhead and latency increase
Solution Approach 1:
The patent extracts only the essential power control parameters needed for precise transmission without requiring complete beam information for each TRP. By taking out just the power-related configuration elements (pathloss references, power offsets, adjustment states), the system achieves transmission precision through optimized power control while minimizing signaling overhead and latency
Solution Approach 2:
The patent performs preliminary configuration of power control parameters at setup time, establishing the power control framework in advance. This preliminary action allows the UE to have pre-configured power control parameters for multiple TRPs, eliminating the need for real-time beam information signaling and reducing latency during actual transmission operations
3Use of energy by moving object
If uplink power control parameters are optimized for multiple TRPs, then power consumption efficiency is improved, but configuration complexity increases
Solution Approach 1:
The patent segments power control configuration into independent parameter sets for each TRP, where each set contains only the necessary power control parameters (pathloss reference, power offset, adjustment state) without requiring complete beam information. This segmentation allows the UE to manage power control for multiple TRPs independently, improving power consumption efficiency while keeping configuration complexity manageable through modular parameter organization
Solution Approach 2:
The patent introduces specific parameter changes by defining new power control parameter sets tailored for multi-TRP scenarios. These parameters include TRP-specific pathloss reference signals, power control adjustment states, and offset values that can be independently configured. By changing and optimizing these specific parameters, the system achieves better power consumption efficiency without requiring complete reconfiguration of the entire spatial relation information structure
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a message scheduling transmission, by the UE, of uplink control information (UCI) in a physical uplink control channel (PUCCH) resource. The UE may receive an indication that the UE is scheduled to transmit the UCI in the PUCCH resource to both a first transmission-reception point (TRP) and a second TRP. The UE may also receive a first set of uplink power control parameters for transmitting the UCI to the first TRP and a second set of uplink power control parameters for transmitting the UCI to the second TRP. The UE may transmit the UCI to the first TRP and to the second TRP in the PUCCH resource, based on the first set and the second set of uplink power control parameters, and without an uplink control channel beam indication.