RU Interference Signaling for DU Cell Parameter Adjustment

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Solution Overview

Problem

Wireless communication systems face challenges in mitigating non-stationary interference from sources like jammers, which are difficult to address with traditional network planning, leading to throughput and sensitivity degradation due to open loop automatic gain control failures.

Innovation Solution

A distributed unit (DU) receives an indication of non-stationary interference from a radio unit (RU), allowing it to adjust cell parameters to mitigate interference, thereby improving RU performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional network planning techniques are used to manage interference, then system complexity is kept low, but non-stationary interference from jammers cannot be mitigated effectively, leading to throughput and sensitivity degradation

Engineering Contradiction:

Improvethroughput and sensitivityVSAvoidnetwork planning complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements a feedback mechanism where the RU monitors interference conditions and sends indications to the DU about non-stationary interference. The DU then adjusts cell parameters based on this feedback, creating a closed-loop system that dynamically responds to jammer interference without requiring complex network planning changes.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The RU performs self-service by autonomously monitoring its own interference conditions and generating interference indications. This self-monitoring capability allows the system to detect and respond to non-stationary interference without external intervention, improving reliability while maintaining simple network planning.

Inventive Principle:

Principle #25Self-service

2Ease of operation

If open loop AGC adjustments are made to handle interference, then power control is simplified, but throughput and sensitivity degradation occur due to inadequate interference mitigation

Engineering Contradiction:

Improvepower control simplicityVSAvoidthroughput and sensitivity

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent transitions from static open-loop AGC to a dynamic closed-loop system where cell parameters are continuously adjusted based on real-time interference indications from the RU. This dynamic adaptation allows the system to maintain simple power control operations while effectively mitigating non-stationary interference to preserve throughput and sensitivity.

Inventive Principle:

Principle #15Dynamics

3Reliability

If the DU adjusts cell parameters in response to interference indications, then interference mitigation effectiveness is improved, but system response time and complexity increase

Engineering Contradiction:

Improveinterference mitigation effectivenessVSAvoidsystem response time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The RU continuously monitors interference conditions and prepares interference indications in advance, so when non-stationary interference is detected, the DU can immediately adjust cell parameters without delay. This preliminary monitoring and preparation reduces system response time while maintaining effective interference mitigation.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12610261B2Indication of non-stationary interference condition

Publication Date: 2026.04.21 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a distributed unit (DU) may receive, from a radio unit (RU) associated with the DU, an indication of a non-stationary interference condition. The DU may adjust a parameter of at least one cell associated with the RU using the indication. Numerous other aspects are described.