Configured Grant Multi-TRP Uplink Parameter Mapping
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring parameters for configured grant based multi-transmission reception point communications, particularly in managing redundancy versions and power control parameters across multiple transmission/reception points.
Innovation Solution
The system implements a method where user equipment (UE) receives control messages scheduling repetitions of uplink transmissions to multiple transmission/reception points, with specific redundancy version sequences and power control parameters applied to each set of repetitions, allowing for efficient mapping and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple redundancy version sequences are configured for different transmission/reception points, then communication reliability is improved, but parameter configuration complexity increases
Solution Approach 1:
The patent divides the redundancy version configuration into separate sequences for different transmission/reception points. Each TRP receives a dedicated RV sequence, allowing independent optimization of reliability for each point while maintaining manageable configuration through clear separation of parameters.
Solution Approach 2:
Different redundancy version sequences are assigned to different transmission/reception points based on their specific channel conditions and requirements. This allows each TRP to have optimized local parameters tailored to its transmission characteristics, improving overall system reliability without requiring uniform configuration across all points.
2Reliability
If separate power control parameters are configured for each transmission/reception point, then transmission performance is improved, but control message overhead increases
Solution Approach 1:
Power control parameters are segmented into separate sets for different transmission/reception points, with each set independently configured and applied. This segmentation enables precise power control for each TRP while the patent manages overhead through efficient parameter organization in control messages.
Solution Approach 2:
The patent introduces parameter mapping rules that efficiently organize and transmit multiple power control parameter sets. By establishing systematic mapping relationships between parameter sets and TRPs, the patent reduces control message overhead while maintaining the ability to independently adjust power parameters for each transmission point.
3Reliability
If multiple sets of parameters are mapped to different repetition sets, then transmission robustness is improved, but processing complexity at UE increases
Solution Approach 1:
Parameter mapping rules are pre-configured and established before actual transmission occurs. The UE receives and stores multiple parameter sets with predefined mapping relationships to different repetition sets, eliminating the need for complex real-time decision-making during transmission and reducing processing complexity while maintaining robustness.
Solution Approach 2:
The patent establishes systematic parameter mapping rules that transform multiple parameter sets into an organized structure that the UE can efficiently process. By defining clear mapping relationships between parameter sets and repetition sets, the patent reduces UE processing complexity while enabling the use of multiple parameter sets for improved transmission robustness.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for a user equipment (UE) receiving control messages that schedule a first and second set of repetitions of an uplink transmission to respective transmission/reception points (TRPs). The one or more control messages may be indicative of a first redundancy version (RV) sequence that is to be applied to the first set of repetitions and a second RV sequence that is to be applied to the second set of repetitions. The control messages may also indicate a first set of power control parameters and a second set of power control parameters. The UE may map the first and second set of power control parameters to the first and second set of repetitions according to a rule. The UE may transmit the first and second sets of repetitions according to the respective RV sequences and power control parameters.