Uplink Channel Repetition with Spatial Relation Mapping
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Solution Overview
Problem
Existing wireless communication systems face challenges in accommodating explosive data traffic, high transmission rates, and low latency while ensuring energy efficiency, particularly in the context of uplink channel transmission.
Innovation Solution
A method and device for repeatedly transmitting an uplink channel in a wireless communication system, where the channel is mapped to multiple transmission occasions with associated transmission units, and a spatial relation reference signal is mapped to each occasion, allowing for the same or different signals across contiguous occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink channel is transmitted multiple times across multiple transmission occasions, then reliability of transmission is improved, but transmission time and system complexity increase
Solution Approach 1:
The patent segments the uplink channel transmission into multiple transmission occasions (TO) with multiple transmission units (TU). Each TO can contain one or more TUs, allowing the transmission to be divided into manageable parts that can be independently configured and transmitted at different times, thereby improving reliability while controlling time consumption through structured segmentation.
Solution Approach 2:
The patent introduces dynamic configuration where the mapping between transmission occasions and transmission units can be flexible. The system can adaptively assign multiple TUs to specific TOs based on channel conditions and requirements, allowing dynamic adjustment of transmission timing and structure to optimize both reliability and time efficiency.
2Measurement precision
If spatial relation reference signal is mapped to each transmission occasion, then transmission precision and beam alignment accuracy are improved, but configuration complexity increases
Solution Approach 1:
The spatial relation reference signal serves multiple functions: it provides beam alignment information, enables spatial relation determination for different TUs within the same TO, and facilitates downlink control channel configuration. By making this single signal resource multi-functional, the patent improves measurement precision without proportionally increasing configuration complexity.
Solution Approach 2:
The patent performs preliminary mapping of spatial relation reference signals to transmission occasions before actual transmission occurs. This pre-configuration allows the system to prepare beam alignment parameters and spatial relations in advance, reducing real-time configuration complexity while maintaining high measurement precision during transmission.
3Adaptability or versatility
If transmission unit is split into multiple parts across transmission occasions, then adaptability to different channel conditions is improved, but uncertainty in signal mapping arises
Solution Approach 1:
The patent incorporates feedback mechanisms where the base station receives signals from the terminal across multiple transmission occasions and uses this feedback to determine optimal spatial relations and adjust future transmissions. This feedback loop resolves mapping uncertainties by continuously adapting the signal mapping based on actual channel conditions and reception quality.
Solution Approach 2:
The patent allows dynamic changes in transmission parameters across different transmission occasions, such as modifying which TUs are transmitted in which TOs, adjusting spatial relation configurations, and changing beam directions. These parameter changes enable adaptability to varying channel conditions while maintaining clear signal mapping through systematic parameter management.
4Productivity
If multiple transmission units are mapped to transmission occasions, then system capacity and data throughput are improved, but control channel configuration complexity increases
Solution Approach 1:
The patent merges multiple transmission units into transmission occasion structures that can be configured and controlled together. By grouping TUs into TOs, the system can manage multiple transmission units through a unified control framework, increasing system capacity while reducing the complexity of individual control channel configurations through consolidation.
Data Source
AI summary
A method for a terminal to repeatedly transmit an uplink channel in a wireless communication system includes: an uplink channel mapping step for mapping one uplink channel to a plurality of transmission occasions (TO) associated with a plurality of transmission units (TU) that are fewer in number than the plurality of TOs, wherein each of one or more specific TUs among the plurality of TUs includes two or more contiguous TOs; a step for mapping a spatial relation reference signal (RS) to each of the plurality of TOs; and a step for transmitting the one uplink channel to a base station at each of the plurality of TOs on the basis of the spatial relation reference signals, wherein the spatial relation reference signals to be mapped to the two or more contiguous TOs included in the one or more specific TUs may be identical or different.