Reference Signal Power Control Under Dynamic Uplink Resource Changes

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Solution Overview

Problem

The dynamic adjustment of SRS transmission in NR technology leads to incorrect power control command duration and communication robustness issues due to variations in slot format configuration, particularly with DCI format 2_0, causing flexibility and DCI overhead problems.

Innovation Solution

Determine power adjustment information for current RS communication based on a modification result indicating whether previous RS communication is modified, and perform the current communication based on this information, ensuring availability and flexibility of uplink resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If dynamic adjustment of SRS transmission is implemented to improve flexibility, then adaptability is improved, but power control accuracy deteriorates due to incorrect TPC command duration counting

Engineering Contradiction:

Improveflexibility of SRS transmissionVSAvoidpower control accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent implements dynamic adjustment of SRS transmission timing through DCI format 2_0 indications, allowing the slot offset between PDCCH and SRS to be dynamically changed. This enables the system to adapt to varying slot format configurations while maintaining correct power control by dynamically adjusting the TPC command duration calculation based on the actual transmission timing.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of TPC command duration calculation method to accommodate dynamic SRS transmission adjustments. Instead of using a fixed duration based on original slot timing, the system calculates TPC command duration based on the actual dynamic transmission timing indicated by DCI format 2_0, ensuring power control accuracy is maintained despite timing variations.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If dynamic adjustment of SRS transmission is implemented to improve flexibility, then adaptability is improved, but communication reliability deteriorates due to robustness issues

Engineering Contradiction:

Improveflexibility of SRS transmissionVSAvoidcommunication robustness

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent incorporates feedback mechanisms where the network device monitors the dynamic SRS transmission adjustments and provides corrective indications through DCI format 2_0. This feedback loop ensures that power control commands are properly synchronized with actual transmission timing, maintaining communication reliability despite dynamic timing changes.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent applies beforehand cushioning by pre-calculating and indicating the correct TPC command duration through DCI format 2-0 before the actual SRS transmission occurs. This proactive approach prevents power control errors from occurring in the first place, thereby maintaining communication robustness while enabling dynamic timing adjustments.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Device complexity

If fixed TPC command duration counting is used to simplify power control, then device complexity is reduced, but adaptability deteriorates due to inability to handle dynamic timing adjustments

Engineering Contradiction:

Improvepower control complexityVSAvoidflexibility of SRS transmission

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent transitions from a static TPC command duration calculation to a dynamic one that adapts to changing transmission timing. The system now calculates TPC command duration based on the actual dynamic slot offset indicated by DCI format 2-0, allowing the power control mechanism to flexibly accommodate varying transmission schedules without requiring complex reconfiguration.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12557040B2Method, device and computer readable medium for communication

Publication Date: 2026.02.17 NEC CORP

AI summary

Embodiments of the present disclosure relate to methods, devices and computer readable media for communication of a RS. A method of communication comprises receiving, at a terminal device and from a network device, first information triggering a first communication of a reference signal in a first uplink resource, the first communication being triggered later than a second communication of the reference signal in a second uplink resource; determining, based on a modification result, power adjustment information for the first communication, the modification result indicating whether the second uplink resource is modified; and performing the first communication based on the power adjustment information. Embodiments of the present disclosure can ensure a correct power control for RS communication, and can achieve a dynamic adjustment for a RS communication while considering both flexibility of RS triggering and its related overhead.