Uplink Spatial Parameter Mapping for Multi-TO Wireless Transmission
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Solution Overview
Problem
The existing wireless communication systems face challenges in managing uplink transmission and reception due to the lack of efficient methods for updating default spatial relations and pathloss reference signals, particularly in scenarios involving single/multi-TRP and single/multi-panel terminals.
Innovation Solution
A method and device are introduced to update and utilize default spatial relations and pathloss reference signals for uplink transmission and reception, involving the configuration of multiple spatial parameters and pathloss reference signals, with predefined rules for specific transmission occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple spatial parameters and pathloss reference signals are configured for uplink transmission, then the reliability and adaptability of uplink transmission are improved, but the device complexity and configuration overhead increase
Solution Approach 1:
The patent segments the spatial parameters and pathloss reference signals into multiple candidates (first, second, third candidates) that can be selectively applied to different transmission occasions. This segmentation allows the system to manage complexity by dividing the configuration into manageable parts while maintaining multiple options for reliable transmission.
Solution Approach 2:
The patent establishes predefined rules for selecting spatial parameters and pathloss reference signals before actual uplink transmission occurs. The base station configures multiple candidates in advance, and the terminal prepares selection criteria beforehand, enabling rapid and reliable transmission decisions without real-time complex processing.
2Adaptability or versatility
If default spatial parameters are updated more frequently, then the adaptability to changing channel conditions is improved, but the loss of time for parameter updates and processing increases
Solution Approach 1:
The patent implements periodic updates of default spatial parameters and pathloss reference signals at predetermined intervals or transmission occasions. This periodic approach balances adaptability by regularly refreshing parameters while avoiding continuous updates that would consume excessive time and processing resources.
Solution Approach 2:
Multiple spatial parameter candidates and pathloss reference signal candidates are configured in advance before transmission occasions occur. This preliminary configuration allows the system to quickly select appropriate parameters when needed, reducing real-time update time while maintaining adaptability to channel conditions.
3Measurement precision
If multiple pathloss reference signals are configured for different transmission occasions, then the precision of pathloss measurement is improved, but the device complexity and signal management overhead increase
Solution Approach 1:
The patent segments pathloss reference signals into multiple candidates, each associated with specific transmission occasions or channel conditions. This segmentation allows precise measurement for different scenarios while managing complexity by organizing signals into distinct, manageable groups with specific purposes.
Solution Approach 2:
Different pathloss reference signal candidates are assigned to different transmission occasions or spatial parameters based on local channel conditions. This local quality approach ensures that each transmission occasion uses the most appropriate reference signal for its specific conditions, improving measurement precision without requiring all signals to be managed simultaneously.
Data Source
AI summary
Disclosed are a method and device for transmitting and receiving an uplink in a wireless communication system. A method by which a terminal performs uplink transmission in a wireless communication system according to one embodiment of the present disclosure comprises the steps of: receiving, from a base station, first configuration information related to mapping between one or more uplink reference signals (UL RS) and one or more downlink (DL) RS; receiving, from the base station, second configuration information related to a plurality of spatial parameter candidates for uplink transmission; and performing uplink transmission in N (N≥1) transmission opportunities (TO) on the basis of at least one among N uplink default spatial parameters and N pathloss reference signals (PL RS). The N uplink default spatial parameters are respectively associated with the N TOs. The N PL RSs are respectively associated with the N TOs. The default uplink spatial parameter for a specific TO among the N TOs may be: one spatial parameter, specified by a predefined rule, among the plurality of spatial parameter candidates based on the second configuration information; or a UL RS mapped to the one spatial parameter on the basis of the first configuration information.