Dynamic SRS Frequency Hopping for Power-Aware Channel Reporting

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Solution Overview

Problem

Existing SRS frequency hopping configurations in cellular communications are inefficient and slow, leading to excessive power consumption and difficulty in adapting to changing channel conditions, especially in power-limited or high mobility scenarios, without a fast and efficient mechanism to dynamically switch between wideband and sub-band reporting.

Innovation Solution

Implementing a dynamic mechanism using MAC-CE and DCI signaling to adjust SRS frequency hopping configurations based on power and channel conditions, allowing for sub-band reporting when necessary, thereby conserving energy and improving reporting efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If wideband SRS frequency hopping configuration is used, then channel coverage is improved, but power consumption increases

Engineering Contradiction:

Improvechannel coverageVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic switching between wideband and sub-band SRS frequency hopping configurations based on real-time channel conditions and power status. The base station receives power status indicators from the UE and channel quality indicators, then dynamically selects the appropriate SRS configuration type and bandwidth, allowing the system to adapt between full channel coverage and energy conservation modes as needed

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the SRS configuration parameters (bandwidth, frequency hopping pattern, reporting type) based on detected channel conditions and power status. When power is limited, the system transitions from wideband to sub-band configurations, modifying the frequency domain bandwidth parameter to reduce power consumption while maintaining adequate channel assessment capability

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If fixed SRS frequency hopping configuration is used, then system complexity is reduced, but adaptability to changing channel conditions deteriorates

Engineering Contradiction:

Improvesystem complexityVSAvoidadaptability to channel conditions

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent establishes a feedback mechanism where the UE reports power status indicators and channel quality indicators to the base station. The base station uses this feedback to determine the appropriate SRS configuration type and bandwidth, then communicates the configuration back to the UE. This closed-loop feedback system enables automatic adaptation to changing conditions without increasing operational complexity for the user

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system transitions from a fixed SRS configuration to a dynamic configuration that adapts to changing channel conditions and power status. The base station dynamically selects between aperiodic and periodic SRS reporting types, and adjusts the bandwidth between wideband and sub-band configurations based on real-time conditions, enabling the system to respond to mobility scenarios and power constraints

Inventive Principle:

Principle #15Dynamics

3Measurement precision

If wideband SRS reporting is used, then channel assessment accuracy is improved, but power consumption increases

Engineering Contradiction:

Improvechannel assessment accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent modifies the SRS bandwidth parameter dynamically based on power status and channel conditions. When the UE indicates power limitation, the base station changes the SRS configuration from wideband to sub-band, reducing the frequency domain bandwidth parameter. This parameter change maintains adequate channel assessment capability for the current transmission while significantly reducing the power consumption associated with wideband SRS transmission

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250240130A1Dynamic Selection of Sounding Reference Signal Frequency Hopping Configurations

Publication Date: 2025.07.24 DELL PROD LP

AI summary

A system can, as part of attaching with user equipment (UE), determine a first sounding reference signal (SRS) frequency hopping configuration. The system can communicate the first SRS frequency hopping configuration to the UE. The system can, after the attaching with the UE, receive respective first SRS reports from the UE that are configured according to the first SRS frequency hopping configuration. The system can, in response to identifying that a power consumption of the UE satisfies a power limitation criterion, or that a UE channel condition satisfies a channel condition criterion, modify the first SRS frequency hopping configuration to a second SRS frequency hopping configuration, and communicate the second SRS frequency hopping configuration to the UE. The system can, after communicating the second SRS frequency hopping configuration to the UE, receive respective second SRS reports from the UE that are configured according to the second SRS frequency hopping configuration.