Terminal Default Beam Pathloss Control for Multi-Slot Uplink
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Solution Overview
Problem
Existing radio communication systems, particularly in next-generation mobile communication systems, face challenges in configuring and managing default Transmission Configuration Indication (TCI) states, spatial relations, and pathloss reference signals for terminals, leading to potential degradation in communication quality and throughput.
Innovation Solution
A terminal is equipped with a receiving section to receive configuration information for enabling two default beam pathlosses for uplink transmission and a control section that determines, based on whether the uplink transmission spans multiple slots, at least one of a default spatial relation and a default pathloss reference signal to be applied to the uplink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal applies default TCI states and spatial relations for uplink transmission in next-generation mobile communication systems, then communication reliability is improved, but operation complexity increases due to insufficiently studied configuration methods
Solution Approach 1:
The terminal autonomously determines and applies default spatial relations and pathloss reference signals based on whether uplink transmission spans multiple slots, without requiring complex external configuration or intervention, thereby simplifying operations while maintaining reliability
Solution Approach 2:
The terminal dynamically selects different default spatial relations and pathloss reference signals based on the temporal parameter of uplink transmission (single-slot vs. multi-slot), adapting the configuration to transmission conditions without increasing operational complexity
2Adaptability or versatility
If configuration methods for default TCI states and spatial relations are not sufficiently defined, then system flexibility is maintained, but communication quality degrades
Solution Approach 1:
The configuration method dynamically adapts default spatial relations and pathloss reference signals based on transmission conditions (single-slot vs. multi-slot), providing specific guidance that improves communication quality while maintaining overall system flexibility through conditional application
3Ease of operation
If default spatial relations and pathloss reference signals are not appropriately controlled, then operation simplicity is maintained, but throughput reduction occurs
Solution Approach 1:
The terminal pre-determines the appropriate default spatial relation and pathloss reference signal based on the uplink transmission configuration before transmission occurs, ensuring optimal throughput is achieved without requiring complex real-time control or adjustment operations
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section that receives configuration information for enabling two default beam pathlosses for uplink (UL) transmission and information for indicating the UL transmission, and a control section that determines, based on whether the UL transmission is transmission over a plurality of slots, at least one of a default spatial relation and a default pathloss reference signal (PL-RS) to be applied to the UL transmission. According to one aspect of the present disclosure, it is possible to appropriately control operation related to a default TCI state/spatial relation/pathloss reference signal.