Radio Base Station Interference Correction via Pre-computed Values

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Solution Overview

Problem

Current radio communications networks face performance reduction due to errors in Channel Quality Indicator (CQI) estimates, particularly caused by interference mismatch and delayed RSRP reports, which affect throughput and delay communication performance.

Innovation Solution

A method and system that identify specific interference situations within a radio communications network to select and apply correction values for radio transmission parameters, such as SINR or CQI, to improve transmission accuracy and efficiency by using a set of correction values associated with different interference scenarios, allowing for quicker and more accurate adjustments based on real-time interference conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If RSRP reports are used to compensate for CQI errors, then correction accuracy is improved, but response time increases due to estimation delays of hundreds of milliseconds

Engineering Contradiction:

ImproveCQI correction accuracyVSAvoidresponse time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent pre-calculates and stores correction values for different interference situations before they occur. When interference is detected, the system simply looks up the pre-computed correction value rather than performing time-consuming real-time calculations, thus achieving both accuracy and speed

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent divides the continuous interference compensation problem into discrete interference situations, each with its own correction value. This segmentation allows the system to handle different interference scenarios independently using pre-computed values, avoiding the need for complex real-time analysis

Inventive Principle:

Principle #1Segmentation

2Device complexity

If a single correction value is used for all interference situations, then system complexity is reduced, but performance deteriorates in fast-varying interference conditions

Engineering Contradiction:

Improvecorrection system complexityVSAvoidthroughput

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent applies different correction values tailored to specific interference situations rather than using a uniform correction approach. Each interference situation has its own optimized correction value, allowing the system to adapt locally to varying interference conditions and maintain high throughput

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Correction values for different interference situations are pre-calculated and stored in advance. This allows the system to quickly switch between appropriate correction values based on current interference conditions without performing complex real-time computations, maintaining both simplicity and performance

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8744427B2Radio base station, user equipment and methods therein

Publication Date: 2014.06.03 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

Embodiments herein relate to a method in a radio base station (12) for communicating with a user equipment (10) over a channel structured in transmission time intervals in a radio communications network. The radio base station (12) identifies an interference situation, associated with a transmission time interval, in the cell (15) from a set of interference situations. The radio base station (12) selects a correction value associated with the identified interference situation. Furthermore, the radio base station (12) determines a radio transmission parameter using the correction value; and transmits information, to the user equipment (10), based on the radio transmission parameter.