Terminal Power Control for Multi-TRP Uplink Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In next-generation mobile communication systems, particularly in NR, the existing Rel. 15/16 specification limits performance, scheduling flexibility, and throughput during UL transmission when using multi-TRPs, leading to degraded communication quality.
Innovation Solution
A terminal equipped with a receiving section to process multiple power control parameters for a sounding reference signal resource indicator (SRI) field, allowing the control section to determine transmit power for the uplink shared channel (PUSCH) based on selected power control parameters from the downlink control information (DCI) for scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the existing Rel. 15/16 specification is used for multi-TRP transmission, then device complexity is reduced, but UL transmission performance and throughput are degraded
Solution Approach 1:
The patent segments the power control parameter configuration by associating different power control parameters with different SRI field values. Each SRI value (e.g., 0, 1, 2, 3) corresponds to a specific power control parameter set, allowing the terminal to select appropriate parameters based on the scheduled TRP. This segmentation enables multi-TRP UL transmission with differentiated power control without requiring complex overall reconfiguration.
Solution Approach 2:
The patent introduces a new dimension to the existing power control mechanism by adding SRI field-based parameter selection. Instead of using a single power control parameter for all transmissions, the system now operates in a multi-dimensional space where power control parameters are selected based on the SRI field value, enabling flexible adaptation to different TRP configurations while maintaining backward compatibility.
2Adaptability or versatility
If multiple power control parameters are configured for different SRI values, then UL transmission control flexibility is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by configuring power control parameters specifically for each SRI value rather than using a uniform configuration. Each SRI value (0, 1, 2, 3) has its own associated power control parameter, allowing localized optimization of power control for each TRP configuration. This enables the system to adapt power control settings to specific local conditions (different TRPs) without overwhelming global complexity.
Solution Approach 2:
The terminal performs self-service by autonomously selecting the appropriate power control parameter based on the SRI field value received in the DCI. The selection process is automated and follows predefined association rules, eliminating the need for complex manual configuration or centralized control. The terminal independently manages the mapping between SRI values and power control parameters, simplifying the overall system architecture.
3Reliability
If existing SRI field processing is used, then device complexity is minimized, but UL transmission performance with multi-TRPs is limited
Solution Approach 1:
The patent extends the universality of the SRI field by making it serve dual purposes: both indicating the scheduled TRP and selecting the appropriate power control parameter. The existing SRI field processing mechanism is enhanced to simultaneously perform resource indication and power control parameter selection, eliminating the need for separate signaling for power control in multi-TRP scenarios. This multi-functionality improves reliability without proportionally increasing complexity.
Solution Approach 2:
The system performs preliminary action by pre-configuring the association between SRI field values and power control parameters before actual UL transmission occurs. The terminal is provided with a predetermined mapping table that links each SRI value to its corresponding power control parameter. This preliminary configuration enables rapid, reliable parameter selection during transmission without requiring complex real-time calculations or negotiations.
Data Source
AI summary
A terminal according to an aspect of the present disclosure includes: a receiving section that receives information of a plurality of power control parameters corresponding to one code point of a sounding reference signal resource indicator (SRI) field; and a control section that determines transmit power for an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) by using one of the plurality of power control parameters selected based on a value of the SRI field of downlink control information (DCI) for scheduling the PUSCH. According to one aspect of the present disclosure, UL transmission can be appropriately controlled even in a case where multi-TRPs are used.