UE Spectrum Parameter Reporting for Interference Management

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Solution Overview

Problem

Wireless communication systems face challenges in fully utilizing limited spectrum resources, especially in shared spectra where multiple operators coexist, leading to inefficiencies in power control and interference management.

Innovation Solution

User Equipment (UE) is equipped to detect and report parameters associated with non-serving Base Stations (BS) operating in the same shared spectrum to its serving BS, enabling better power control and interference management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple operators share the same spectrum, then spectrum utilization is improved, but interference management becomes more difficult

Engineering Contradiction:

Improvespectrum utilizationVSAvoidinterference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent implements feedback mechanisms where UEs report measurements of non-serving BS parameters (such as reference signal received power, cell global identifier) to their serving BS. The serving BS uses this feedback information to assess interference conditions and adjust power control parameters dynamically, creating a closed-loop system that manages interference while maintaining spectrum sharing efficiency.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent changes operational parameters by introducing new measurement parameters (non-serving BS RSSI, non-serving BS CGI) and adjusting power control parameters based on detected interference conditions. This allows the system to adapt to varying interference environments while maintaining productive spectrum sharing across multiple operators.

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If UE reports detailed parameters of non-serving BS, then interference management is improved, but signaling overhead increases

Engineering Contradiction:

Improveinterference managementVSAvoidsignaling overhead

Core Design Contradiction:

Object-affected harmful factorsVSLoss of information

Solution Approach 1:

The patent extracts only the most essential parameters from non-serving BS measurements - specifically reference signal received power (RSRP) and cell global identifier (CGI) - that are sufficient for interference assessment. By selecting only these critical parameters for reporting, the patent reduces signaling overhead while maintaining effective interference management capability.

Inventive Principle:

Principle #2Taking out (Extraction)

3Productivity

If serving BS performs optimized power control, then communication efficiency is improved, but system complexity increases

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent enables self-service power control where each serving BS independently manages its own power control parameters based on local measurements and reports from its served UEs. Each BS autonomously adjusts its transmit power and other parameters without requiring complex centralized coordination, thereby improving communication efficiency while limiting the growth of system complexity.

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP3583796B1Measurement and reporting enhancements for shared spectrum

Publication Date: 2021.05.19 QUALCOMM INC

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AI summary

Aspects of the disclosure provide methods and apparatus for enhanced reporting in for a UE operating in a shared spectrum. The UE may detect at least one parameter associated with a non-serving base station (BS) operating in a same spectrum as a serving BS and report, to the serving BS, an indication of the (at least one) parameter.