Multi-TRP Uplink Grant Association for Consistent PUSCH Repetitions
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Solution Overview
Problem
Existing technologies face challenges in associating multiple configured grant (CG) configurations for multi-TRP transmission, determining SRS resources, ensuring same HARQ processes, and maintaining TB size consistency in multi-TRP transmission scenarios.
Innovation Solution
A method involving receiving and associating at least two CG configurations, using DCI and MAC CE commands to activate them, and ensuring non-overlapping PUSCH transmission occasions with slot offsets, SRS resource indicators, and consistent HARQ process IDs across CG configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple CG configurations are used for multi-TRP transmission, then transmission reliability is improved, but system complexity increases due to association management and resource coordination
Solution Approach 1:
The patent segments the multi-TRP transmission by configuring separate CG configurations for different TRPs, each with independent SRS resources and HARQ processes. This allows independent management and optimization of each TRP's transmission parameters while maintaining overall system reliability through diversified transmission paths.
Solution Approach 2:
The patent introduces association information as an intermediary mechanism that links multiple CG configurations. This association information, transmitted via DCI or MAC CE, enables the system to coordinate multiple CG configurations without requiring complex direct interactions between them, thereby reducing management overhead while maintaining reliability.
2Reliability
If multiple CG configurations are activated for multi-TRP transmission, then transmission robustness is improved, but resource overhead increases due to multiple SRS resources and DCI commands
Solution Approach 1:
The patent merges multiple SRS resource indicators into a unified SRS resource indication mechanism. By associating multiple CG configurations with a common SRS resource set or using compact indication methods, the system reduces the total number of SRS resources required while still supporting multi-TRP transmission robustness.
Solution Approach 2:
The patent makes SRS resources universal by configuring them to serve multiple CG configurations simultaneously. A single SRS resource can be shared across multiple CG configurations through proper association, reducing resource overhead while maintaining the ability to support multiple TRPs with different transmission requirements.
3Productivity
If multiple CG configurations are used with different slot offsets, then time-domain resource utilization is improved, but transmission coordination complexity increases
Solution Approach 1:
The patent introduces dynamic slot offsets for different CG configurations, allowing the system to adaptively adjust time-domain resources based on channel conditions and TRP-specific requirements. This dynamic configuration improves time-domain resource utilization by avoiding fixed timing patterns that may lead to conflicts or inefficiencies.
Solution Approach 2:
The patent employs periodic transmission patterns with configured slot offsets for different CG configurations. By establishing regular periodic intervals with pre-configured offsets, the system achieves predictable resource utilization while reducing the need for complex real-time coordination, as the periodic nature allows for advance planning and resource reservation.
Data Source
AI summary
Embodiments of the present disclosure relate to a method and apparatus for multiple transmit-receive points (multi-TRP) transmission. According to an embodiment of the present disclosure, a method can include: receiving at least two configured grant (CG) configurations in a bandwidth part (BWP); receiving association information for associating the at least two CG configurations; and transmitting one or more repetitions of a transport block (TB) on one or more physical uplink shared channel (PUSCH) transmission occasions from each CG configuration of the at least two CG configurations based on the association information. Embodiments of the present disclosure can support the TB transmitted toward multi-TRP according to the multiple CG configurations.